Category: Class 11 Biology Objective Questions

250+ TOP MCQs on Human Excretory System and Answers

Biology Multiple Choice Questions on “Human Excretory System – 1”.

1. Which of the following is not included in the excretory system of humans?
a) Cloaca
b) Kidneys
c) Ureters
d) Urethra
Answer: a
Clarification: In humans, the excretory system consists of a pair of kidneys, one pair of ureters, a urinary bladder, and urethra. Kidneys are reddish-brown and bean-shaped structures.

2. Where are the kidneys situated?
a) Between the 7th and 10th ribs
b) Between the last thoracic and third lumbar vertebra
c) Between the 8th and 9th ribs
d) Between the first and second thoracic vertebra
Answer: b
Clarification: Kidneys are reddish-brown, bean-shaped structures situated between the levels of the last thoracic and third lumbar vertebra close to the dorsal inner wall of the abdominal cavity.

3. What is the average weight of a human kidney?
a) 40 g
b) 100 g
c) 120 g
d) 10 g
Answer: c
Clarification: Each kidney of an adult human measures for about 10-12 cm in length, 5-7 cm in width, and 2-3 cm in thickness with an average weight of 120-170 grams.

4. Through which of the following nerves and blood vessels enter the kidneys?
a) Hilum
b) Tubules
c) Pelvis
d) Medulla
Answer: a
Clarification: Through the hilum, the nerves, the ureters and the blood vessels enter the kidneys. The hilum is a notch which is present towards the centre of the inner concave surface of the kidney.

5. Inside the kidney, there are three zones.
a) True
b) False
Answer: b
Clarification: The outer layer of the kidney is a tough capsule. Inside the kidney, there are two zones, an outer cortex, and an inner medulla. Inner to the hilum, a broad funnel-shaped space is presently called the renal pelvis.

6. Which of the following is responsible for the formation of Columns of Bertini?
a) Medulla
b) Renal pelvis
c) Calyces
d) Cortex
Answer: d
Clarification: Cortex is mainly responsible for the formation of columns of Bertini. The portion of the cortex which extends in between the medullary pyramids as renal columns form the columns of Bertini. The medulla region of the kidney is divided into a few conical masses called medullary pyramids which project into the calyces.

7. Which of the following is incorrectly marked in the given diagram?

a) Renal artery and inferior vena cava
b) Hepatic portal vein and sebaceous gland
c) Dorsal aorta and ureter
d) Urinary bladder and urethra
Answer: b
Clarification: The correct labelling of the given diagram is as shown below:

The given diagram represents the human urinary system. The human urinary system is a complex excretory system which is responsible for the concentration of urine and elimination of urea from the body.

8. How many nephrons are present in each kidney?
a) One million
b) One billion
c) One trillion
d) Two million
Answer: a
Clarification: Each kidney has approximately one million complex tubular structures called nephrons. These nephrons are the structural and functional units of the kidneys.

9. In how many parts a nephron is divided?
a) One
b) Two
c) Three
d) Four
Answer: b
Clarification: Each nephron is divided into two parts- the glomerulus and the renal tubule. The glomerulus is a tuft of capillaries while the renal tubule begins with a double-walled cup-like structure called Bowman’s capsule.

10. What will happen if the diameter of the afferent arteriole is less than efferent arteriole?
a) Dilute urine
b) Concentrated urine
c) No ultrafiltration
d) Black urine
Answer: c
Clarification: The afferent arteriole is a fine branch of the renal artery which has ha wider lumen than the efferent arteriole which carries blood away from the glomerulus. If the afferent arteriole diameter is less than the efferent arteriole, then ultrafiltration is not possible.

11. What does the question mark represents in the given figure?

a) Cortex
b) Medulla
c) Medullary pyramid
d) Renal pelvis
Answer: c
Clarification: The correct labelling of the given figure is as shown:

This figure represents the longitudinal section or a diagrammatic view of a kidney.

12. Starfishes are aminotelic organisms.
a) True
b) False
Answer: a
Clarification: Starfishes are aminotelic organisms as they excrete amino acids directly into the urine. Hippuric acid is an excretory waste formed by the combination of benzoic acid and glycine in mammals.

13. What are osmoregulators?
a) Animals which cannot change their body osmolarity
b) Animals which can change their osmolarity sometimes
c) Animals which can change their osmolarity
d) Animals which cannot excrete out waste
Answer: a
Clarification: Osmoregulators are the animals that cannot change their body osmolarity according to their external environment. They cannot tolerate a wide range of salinity.

14. Which of the following organism is not an osmoconformer?
a) Hagfish
b) Spongilla
c) Marine invertebrates
d) Skates
Answer: b
Clarification: Osmoconformers are the animals that can change their body osmolarity according to the external environment like hagfish, marine invertebrates, sharks, and skates.

15. Which of the following is not an adaptation of kangaroo rat?
a) Drinks water
b) Feeds on fatty seeds
c) Excretes concentrated urine
d) The nasal counter current system
Answer: a
Clarification: Kangaroo rat does not drink water as it feeds on fatty seeds because 1g of fat oxidation produces a double amount of water. It excretes out concentrated urine and has a nasal counter current system.

250+ TOP MCQs on Neural Coordination Basics and Answers

Biology Multiple Choice Questions on “Neural Coordination Basics”.

1. Which of the following integrates all the activities of the organs?
a) The neural and endocrine system
b) The neural and digestive system
c) Digestive and excretory system
d) Excretory and Respiratory system
Answer: a
Clarification: In our body, the neural and the endocrine system jointly coordinate and integrate all the activities of the organs so that they function in a synchronised fashion.

2. Which network does the neural system provide?
a) Cell to cell connection only
b) Point to point connection
c) Organ to organ connection only
d) Tissue to tissue connection only
Answer: a
Clarification: The neural system provides an organized network of point to point connections for quick coordination. These functions of the organs or the organ systems must be coordinated in our body to maintain homeostasis.

3. What is meant by coordination?
a) Only two organs interact
b) Only three organs interact
c) Only two organs systems interact
d) Two or more organs interact
Answer: d
Clarification: Coordination is the process through which two or more organs interact and complement the functions of one another. For example, the functions of muscles, lungs, heart, blood vessels, kidney, and other organs are coordinated while performing physical exercises.

4. What does the endocrine system provide us?
a) Chemical integration through cell secretions
b) Chemical integration through cell division
c) Chemical integration through hormones
d) Chemical integration through tissues
Answer: c
Clarification: The endocrine system provides chemical integration through the hormones. The neural and the endocrine systems jointly coordinate and regulate the physiological functions in the body.

5. Which of the following functions is not performed by neurons?
a) Detect the stimuli
b) Receive the stimuli
c) Transmit the stimuli
d) Secrete the stimuli
Answer: d
Clarification: The neurons are not responsible for secreting the stimuli. Instead, their main functions include-detecting, receiving and transmitting stimuli over large distances in our body.

6. What kind of neurons is present in Hydra?
a) Apolar neurons
b) Unipolar neurons
c) Bipolar neurons
d) Multipolar neurons
Answer: a
Clarification: The neural organisation is very simple in lower invertebrates. For example, Hydra neural organisation just consists of a network of neurons. Apolar or non-polar types of neurons are present in hydra.

7. The neural system of lower invertebrates is better than the insects.
a) True
b) False
Answer: b
Clarification: The neural system of insects is better organised than the lower invertebrates as a brain is present along with several ganglia and neural tissues. The vertebrates have a more developed neural system.

8. How can a nerve cell be distinguished from other cells of the body?
a) Presence of granules in nucleus
b) Presence of different nucleus
c) Presence of neurites
d) Presence of ribosomes
Answer: c
Clarification: A nerve cell can be distinguished from other cells of the body by the presence of neurites. Neurites are any projection from the cell body of the neuron-like dendrites or the axons.

9. What is the full form of PNS?
a) Peripheral neural systole
b) Peripheral nervous system
c) Peritubular neural systole
d) Peritubular nervous system
Answer: b
Clarification: PNS stands for the Peripheral nervous system. The PNS comprises of all the nerves of the body associated with the central nervous system-brain and the spinal cord.

10. How many different types of PNS fibres are there?
a) One
b) Two
c) Three
d) Four
Answer: b
Clarification: The nerve fibres of the PNS are of two types:
i. Afferent fibres which transmit impulses from tissues/organs to CNS
ii. Efferent fibres which transmit regulatory impulses from CNS to the concerned tissues/organs.

11. The peripheral nervous system has how many divisions?
a) Two
b) Three
c) Four
d) Five
Answer: a
Clarification: The PNS is divided into two major divisions called somatic neural system and autonomic neural system. The somatic neural system relays impulses from CNS to the skeletal muscles while ANS transmits impulses from CNS to the smooth muscles.

12. The visceral nervous system is the part of the peripheral nervous system.
a) True
b) False
Answer: a
Clarification: Visceral nervous system is the part of the peripheral nervous system that comprises the whole complex of nerves, fibres, ganglia, and plexuses by which impulses travel from the CNS to the viscera and vice-versa.

13. Which of the following is not a part of a neuron?
a) Cell body
b) Lignin
c) Dendrites
d) Axon
Answer: b
Clarification: A neuron is a microscopic structure composed of three major parts, namely, call body, dendrites, and axon. The cell body contains cytoplasm with typical cell organelles and certain granular bodies called Nissl’s granules.

14. What are the short repeatedly branched fibres called?
a) Axon
b) Cell body
c) Neurite
d) Dendrite
Answer: d
Clarification: Short and repeatedly branched fibres are called dendrites. These branches project out of the cell body of the neuron. These branches also contain Nissl’s granules in their cytoplasm.

15. What does each branch of axon terminate into?
a) Synaptic knob
b) Vesicles
c) Tubules
d) Another cell
Answer: a
Clarification: Each branch of an axon terminates into a synaptic knob. The axon is a long fibre which is branched at the end. Each branch terminates as a bulb-like structure called a synaptic knob. These knobs consist of some synaptic vesicles which contain some neurotransmitters like acetylcholine.

250+ TOP MCQs on Chemical Control and Coordination – Mechanism of Hormone Action and Answers

Biology Multiple Choice Questions on “Chemical Control and Coordination – Mechanism of Hormone Action”.

1. Hormone receptors are ______
a) glycolipids
b) lipids
c) polysaccharides
d) proteins
Answer: d
Clarification: Hormone receptors are proteinaceous in nature. These receptors are located on or inside the cells. It is where a hormone binds on a cell. The binding of the hormone signals the cells to perform their tasks.

2. Which of these is false regarding receptors?
a) Intracellular receptors are present within the cell
b) Receptors form complexes with hormones
c) Receptors disintegrate after contact with hormones
d) Receptors are specific
Answer: c
Clarification: Receptors are the structures of the cell to which hormones bind and form hormone-receptor complex. They do not disintegrate. Receptors are specific for each hormone. Intracellular receptors are present in the cytoplasm.

3. What type of hormone is glucagon?
a) Iodothyronines
b) Steroids
c) Peptide
d) Amino acid derivatives
Answer: c
Clarification: Glucagon is a peptide hormone. It is synthesized and secreted by the alpha cells of the pancreas. The function of glucagon is to break glycogen into glucose. This raises the blood sugar level.

4. Hypothalamic hormones are ______
a) peptides
b) steroids
c) iodothyronines
d) amino acid derivates
Answer: a
Clarification: Hypothalamic hormones are peptides. They are secreted by the hypothalamus. Peptides, steroids, iodothyronines and amino acid derivatives are the different categories of hormones.

5. Adrenaline is derived from ______
a) lipopolysaccharides
b) amino acids
c) lipids
d) sugars
Answer: b
Clarification: Adrenaline or epinephrine is derived from amino acids. It is secreted by the outer cortex of the pair of adrenal glands. It is the emergency hormone secreted during a fight or flight response.

6. Which of these is a secondary messenger?
a) Ca2+
b) Mg2+
c) Na+
d) K+
Answer: c
Clarification: Ca2+ is an important secondary messenger. It carries signals or messages from membrane receptors to the designated areas inside the cells. It is also important for muscle contractions.

7. IP3 is a(n) _____
a) secondary messenger
b) membrane receptor
c) intracellular receptor
d) nuclear receptor
Answer: a
Clarification: IP3 is an important secondary messenger. When a hormone binds to a receptor, it forms a hormone receptor complex. This hormone receptor complex transmits a secondary signal inside the cell via secondary messengers.

8. Which of these functions is not regulated by intracellular hormone-receptor complexes?
a) Regulation of gene expression
b) Regulation of chromosome function
c) Interaction with the genome
d) Regulation of K+ entry into the cell
Answer: d
Clarification: Intracellular hormone-receptor complexes transmit signals mainly to the nucleus for the regulation of gene expression, regulation of chromosome function through indirect interaction with the genome.

9. Identify the structure ‘x’.

a) Nuclear receptor
b) Intracellular receptor
c) Hormone-receptor complex
d) Gap junction
Answer: c
Clarification: When a hormone binds to a receptor it forms a hormone-receptor complex. The given hormone-receptor complex lies on the cell membrane. Hence, the hormone is bound to a membrane receptor.

10. The receptor for estrogen is intracellular. True or false?
a) True
b) False
Answer: a
Clarification: Estrogen is a steroid hormone secreted by the ovaries. Since it is a steroid hormone, estrogen can easily pass through the lipid bilayer of the cell membrane without a receptor. Thus its receptor lies in the cytoplasm, or the receptor is intracellular.

250+ TOP MCQs on Diversity in the Living World and Answers

Biology MCQs for Class 11 on “Diversity in the Living World – 2”.

1. The number of described species of living organisms is _________
a) 1.25 million species
b) 0.5 million species
c) 1.025 million species
d) 1.7 million species
Answer: d
Clarification: There are 1.7-1.8 million species of living organisms described on the date. Also, there are 1.25 million species of animals, 0.5 million species of plants and 1.025 million species of insects found and described by scientists.

2. The organisation of the biological world begins with __________
a) cellular level
b) atomic level
c) submicroscopic molecular level
d) organismic level
Answer: c
Clarification: The biological world organisation begins with the submicroscopic molecular level which further broadens to the cellular level and organismic level. The submicroscopic molecular level consists of proteins, carbohydrates, lipids and nucleic acids organised into organelles of the cell.

3. Which of the following books is not written by Carolus Linnaeus?
a) Systema Naturae
b) Historia Naturalis
c) Species Plantarum
d) Philosophia Botanica
Answer: b
Clarification: Historia Naturalis is authored by Pliny the Elder whereas Systema Naturae, Species Plantarum and Philosophia Botanica are written by Linnaeus.

4. Who is the Father of New Systematics?
a) Aristotle
b) Linnaeus
c) Theophrastus
d) Julian Huxley
Answer: d
Clarification: Sir Julian Huxley is the Father of New Systematics. Aristotle is the Father of Zoology. Linnaeus is the Father of Taxonomy. Theophrastus is the Father of Botany.

5. A taxon can be defined as _________
a) a group of related families
b) a group of related species
c) a taxonomic group of any ranking
d) the number and type of organisms present on Earth
Answer: c
Clarification: A taxon is a taxonomic group of any ranking whereas a group of related species is the genus and a group of related families is the order. Biodiversity is the number and type of organisms present on Earth.

6. Which among the following is not a code of nomenclature for organisms?
a) International Code of Botanical Nomenclature
b) International Code of Bacteriological Nomenclature
c) International Code of Zoological Nomenclature
d) International Union of Pure and Applied Chemistry
Answer: d
Clarification: International Union of Pure and Applied Chemistry is for the nomenclature of organic compounds while the International Code of Botanical Nomenclature, International Code of Bacteriological Nomenclature and International Code of Zoological Nomenclature are the three codes of nomenclature for living organisms.

7. Statement A: Species is the basic unit of classification.
Statement B: Two plants can be said to belong to the same species if they can reproduce freely with each other and form seeds.
a) Both the statements are true
b) Both the statements are false
c) Statement A is true but Statement B is false
d) Statement B is true but Statement A is false
Answer: a
Clarification: Both the statements are correct. Closely linked organisms belong to the same species and they can interbreed among themselves to produce fertile progenies.

8. Statement A: The process of classification is called taxonomy.
Statement B: Characterisation, identification, classification and nomenclature are basic to taxonomy.
a) Both the statements are true
b) Both the statements are false
c) Statement A is true but Statement B is false
d) Statement B is true but Statement A is false
Answer: a
Clarification: Both the statements are correct. Taxonomy involves classification of organisms and Characterisation, identification, classification and nomenclature are parts of the same.

9. Which of the following takes into account evolutionary relationships between organisms?
a) Cladistics
b) Artificial System of Classification
c) Natural System of classification
d) Systematics
Answer: d
Clarification: Systematics considers phylogenetic relationships for classification. Cladistics consists of ancestral and derived characters as the basis of classification, Artificial System of Classification takes into account the morphological characters and Natural System of classification considers the natural similarities and dissimilarities to bring out relationships.

10. Binomial Nomenclature means giving a scientific name consisting of a generic name and a family name.
a) True
b) False
Answer: b
Clarification: Binomial Nomenclature means giving a scientific name consisting of a generic name and a specific epithet.

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250+ TOP MCQs on Plant Kingdom – Algae-2 and Answers

Biology Written Test Questions and Answers for Class 11 on “Plant Kingdom – Algae-2”.

1. Which of the following modes are used by spirogyra to reproduce?
a) Fragmentation
b) Multiple fission
c) Spore formation
d) Binary fission
Answer: a
Clarification: In fragmentation, a parent organism breaks into a fragment and each fragment gives a new individual. Spirogyra uses fragmentation to reproduction.

2. During unfavourable conditions, the outer layer that is formed in chlamydomonas is called as ______
a) Cyst
b) Nuclear membrane
c) Cell wall
d) Cellular membrane
Answer: a
Clarification: During unfavourable conditions, an outer layer that is formed outside chlamydomonas is called cyst. These unfavourable conditions allow multiple fission inside the cyst.

3. Which among the following is an incorrect statement?
a) Multiple fission is a process through which many individuals are produced by repeated nuclear division
b) Multiple fission takes place under suitable conditions
c) During multiple fission, an outer layer called cyst is formed
d) Nucleus divides repeatedly and new individuals are formed inside the cyst after which cyst breaks to release new individuals
Answer: b
Clarification: Multiple fission is a process through which many individuals are produced by repeated nuclear division. Multiple fission takes place under unfavourable conditions. During multiple fission, an outer layer called cyst is formed. Nucleus divides repeatedly and new individuals are formed inside the cyst after which cyst breaks to release new individuals.

4. Which among the following is an incorrect statement?
a) Most of the algae reproduce using spore formation
b) Asexual spores are called as zoo-spores and the reproductive part in algae is called zoosporangium
c) Under favourable conditions, these organisms germinate to form new organism
d) Zoo-spores are non-motile and flagellated
Answer: d
Clarification: Most of the algae reproduce using spore formation. Asexual spores are called as zoo-spores and the reproductive part in algae is called zoosporangium. Under favourable conditions, these organisms germinate to form new organism. Zoo-spores are motile and flagellated.

5. Reproduction in humans is an example of _______
a) Isogamous
b) Anisogamous
c) Oogamous
d) Sapiogamous
Answer: c
Clarification: In oogamous mode of reproduction, the larger gamete is non-motile and smaller gamete is motile. In humans, sperms being the smaller gamete are motile and the egg being the larger gamete is non-motile. Therefore, reproduction in humans is an example of oogamous reproduction.

6. The male gamete in sexual reproduction of algae is called as _______
a) Antherozoid
b) Egg
c) Basidiogamete
d) Zoosperm
Answer: b
Clarification: The male gamete in sexual reproduction of algae is called antherozoid and the female gamete is called egg. These two gametes fuse to form a zygote which will further develop to form spores.

7. Gelidium and Gracilaria is used in the formation of _______
a) Agar
b) Vinegar
c) Yoghurt
d) Beer
Answer: a
Clarification: Gelidium and Gracilaria is used in the formation of Agar. Agar is used in the preparation of ice-creams and jellies. Apart from the preparation of ice-creams, agar has different uses in both industries and in research.

8. Which among the following is incorrect?
a) Algae help in increasing oxygen levels in the environment
b) Chlorella and Spirullina are multi-cellular algae that are rich proteins and are used as food supplements for space travelers
c) Chlorophyceae comprise algae that contain chlorophyll a and chlorophyll b
d) Chlorophyceae store food as proteins, starch or as oil droplets
Answer: b
Clarification: Algae help in increasing oxygen levels in the environment. Chlorella and Spirullina are multi-cellular algae that are rich proteins and are used as food supplements for space travelers. Chlorophyceae comprise algae that contain chlorophyll a and chlorophyll b. Chlorophyceae store food as proteins, starch or as oil droplets.

9. The storage bodies present in chloroplasts of chlorophyceae are called as ________
a) Pyrenoids
b) Carragen
c) Stroma
d) Alga
Answer: a
Clarification: In chlorophyceae, chloroplasts contain storage bodies called Pyrenoids. Pyrenoids consists of proteins and starch. Chlorophyceae sometimes store food as oil droplets.

10. The color in Phaecophyceae depends on the amount of xanthophyll and fucoxanthin.
a) True
b) False
Answer: a
Clarification: The color in Phaecophyceae depends on the amount of xanthophylls and fucoxanthin. Their colors vary from olive green to different shades of brown depending on the amount of pigments present.

11. Food is stored in Phaecophyceae as ___________
a) Starch
b) Laminol
c) Glucose
d) Fructose
Answer: a
Clarification: In Phaecophyceae, food is stored in the form of complex carbohydrates like laminol and manitol. Sometimes food is also stored as oil droplets in phaecophyceae.

12. A leaf like photosynthetic organ in Phaecophyceae is called as ________
a) Frond
b) Stipe
c) Holdfast
d) Algin
Answer: a
Clarification: The vegetative cells in Phaecophyceae are made up of two layers with the inner one being made of cellulose and the other being made of gelatinous coating of algin. A leaf like photosynthetic organ in Phaecophyceae is called as frond. They also have a stalk called stipe and a substratum called as holdfast.

13. Rhodophyceae is also called as red algae because of the presence of a pigment called r-phycoerythrin.
a) True
b) False
Answer: a
Clarification: Rhodophyceae are also called as red algae because of the presence of a red pigment called r-phycoerythrin. They are mostly found in marine water and float on the surface of the water.

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250+ TOP MCQs on Animal Kingdom – Chordata-3 and Answers

Zoology Question Bank on “Animal Kingdom – Chordata-3”.

1. The word Chordata gets its origin from ________
a) Greek
b) Latin
c) Arab
d) Sanskrit
Answer: b
Clarification: The word Chordata derives its origin from the Latin word Chordate which means those that posses’ chord. In most of the chordates spinal cord might gradually mature to form back bone.

2. Salamander is an example of __________
a) Reptile
b) Osteichthytes
c) Amphibians
d) Mammals
Answer: c
Clarification: Salamander is an example of the phylum amphibia. Salamander can survive both in water and on land. They use their gills when inside water and they use lungs when on land. Their skin is moist.

3. Scutes are also called as _____
a) Wings
b) Scales
c) Gills
d) Glands
Answer: b
Clarification: Scutes are also called scales. Reptiles are covered with scales and help them in movement and in respiration. Vipera, garden lizard, chelone, testudo, alligator and hemicydactylus are examples of scales.

4. What does the word homoiothermous refer to?
a) Lie in the same temperature
b) Warm blooded animals
c) The animal is in thermal equilibrium with its surrounding
d) The animal lives in isotonic conditions
Answer: b
Clarification: Homoiothermous are the warm blooded animals i.e. they can generate heat internally. Examples of the warm-blooded include aves and mammals and examples of cold blooded animals include reptiles and Pisces.

5. Mammals are the milk feeding animals.
a) True
b) False
Answer: a
Clarification: Mammals are the milk feeding animals. Mammals are derived from the Latin word “mamma” which means breast. All the mammals feed the animals with milk. Sometimes, mammals lay eggs to reproduce and may give birth to reproduce.

6. Which among the following is an incorrect interesting fact about Aves?
a) Their bones are hollow and help them to fly
b) Air sacs are sites of gas exchange in Avian Dinosaurs
c) Humming bird is the smallest bird
d) Ostrich and penguins are few birds that can’t fly
Answer: b
Clarification: The Aves have hollow bones and help them to fly. Air sacs are not sites of gas exchange in Avian Dinosaurs. Humming bird is the smallest bird. Ostrich and penguins are few birds that can’t fly.

7. Which among the following is incorrect about mammals?
a) African elephant is the largest mammal on the Earth
b) Mammalia derives its origin from Latin word Mamma which means breast
c) Mammals have hair or fur and are warm-blooded
d) The necessary condition for being a mammal is to give birth to their young ones
Answer: d
Clarification: African elephant is the largest mammal on the Earth. Mammalia derives its origin from Latin word Mamma which means breast. Mammals have hair or fur and are warm-blooded. The necessary condition for being a mammal is to feed their young ones with milk. Although most animals reproduce by laying eggs there are few exceptions to this.

8. Which among the following is incorrect about reptiles?
a) Reptiles cannot generate their body heat internally like humans do
b) Reptiles cannot sense smell like humans do instead they flick their tongue out in order to sense chemo receptors
c) Reptiles derive its origin from the word reptum which means creep or crawl
d) Reptiles are warm blooded animals
Answer: d
Clarification: Reptiles cannot generate their body heat internally like humans do. Reptiles cannot sense smell like humans do instead they flick their tongue out in order to sense chemo receptors. Reptiles derive its origin from the word reptum which means creep or crawl. Reptiles are cold blooded animals.

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