General Science: Biology Quiz (Structural Organisation In Animals)

Instructions:

1. This quiz contains 20 multiple-choice questions.
2. Select the most appropriate option for each question.
3. After selecting an option, click on "NEXT" to move to the next question.
4. Once you have completed the test, you will see your score and can review your answers.

Result:

1/20

What is the most common species of frog found in India?

Rana hexadactyla

Rana cyanophlyctis

Rana aurantiaca

Rana tigrina

The most common species of frog found in India is Rana tigrina. This species is widely distributed and known for its adaptability to various environments. Understanding the different species helps in the study of biodiversity and ecological balance.

2/20

What helps frogs in camouflage?

Their ability to produce sound

Their ability to swim

Their ability to change color

Their ability to jump

Frogs have the ability to change their color to blend into their surroundings, a phenomenon known as camouflage. This ability helps them hide from predators and is crucial for their survival in the wild.

3/20

What is the function of the nictitating membrane in frogs?

Protects eyes underwater

Helps in hearing

Aids in respiration

Assists in jumping

The nictitating membrane in frogs is a transparent or translucent third eyelid that protects their eyes while they are underwater, allowing them to see clearly and stay safe from debris or predators.

4/20

How do frogs maintain their body temperature?

By basking in the sun

By varying with the environment

By burrowing underground

By staying in water

Frogs are cold-blooded animals, meaning their body temperature varies with the temperature of the environment. This adaptation allows them to survive in diverse climates but makes them dependent on external conditions to regulate their body temperature.

5/20

What is the term used for the summer sleep of frogs?

Hibernation

Aestivation

Camouflage

Migration

Aestivation is the term used for the summer sleep of frogs. During extreme heat, frogs enter a state of dormancy to avoid dehydration and overheating, similar to hibernation in winter but triggered by high temperatures.

6/20

What is the main function of the liver in frogs?

Secretes bile

Filters blood

Stores nutrients

Produces red blood cells

The liver in frogs secretes bile, which is essential for the digestion of fats. Bile is stored in the gall bladder and released into the small intestine to aid in the emulsification of fats, making them easier to digest and absorb.

7/20

Where does the final digestion of food take place in frogs?

Stomach

Duodenum

Rectum

Intestine

The final digestion of food in frogs takes place in the intestine. The intestine contains numerous finger-like projections called villi and microvilli that increase the surface area for absorption of nutrients.

8/20

How do frogs respire underwater?

Through lungs

Through nostrils

Through skin

Through mouth

Frogs respire underwater through their skin in a process called cutaneous respiration. Their skin can absorb dissolved oxygen from water, allowing them to breathe without using their lungs.

9/20

What is the main role of the pancreas in frogs?

Produces bile

Filters blood

Secretes digestive enzymes

Stores glycogen

The pancreas in frogs secretes digestive enzymes that aid in the breakdown of carbohydrates, proteins, and fats. These enzymes are released into the small intestine, where they help in the final stages of digestion.

10/20

How do frogs' hind limbs help them?

In breathing

In swimming and jumping

In hearing

In feeding

The hind limbs of frogs are larger and more muscular than their forelimbs, helping them in swimming and jumping. The webbed digits of the hind limbs aid in swimming by increasing surface area for propulsion.

11/20

What do male frogs use their vocal sacs for?

Producing sounds

Breathing

Feeding

Hearing

Male frogs use their vocal sacs to produce sounds, which are crucial for attracting females during the breeding season. These sounds are also used to establish territory and communicate with other frogs.

12/20

How do frogs absorb water?

Through mouth

Through lungs

Through nostrils

Through skin

Frogs absorb water through their skin, particularly from their belly region, in a process known as cutaneous absorption. This adaptation allows them to stay hydrated without drinking water.

13/20

What is the function of the tympanum in frogs?

Hearing

Breathing

Feeding

Swimming

The tympanum, or eardrum, in frogs is a thin membrane that vibrates in response to sound waves, allowing the frog to hear. It is an important sensory organ for detecting sounds in their environment.

14/20

What is the role of the cloaca in frogs?

Respiration

Circulation

Excretion and reproduction

Feeding

The cloaca is a common chamber and outlet for the digestive, urinary, and reproductive tracts in frogs. It plays a crucial role in the excretion of waste and the release of eggs or sperm during reproduction.

15/20

How do frogs' tongues help them catch prey?

By swallowing the prey whole

By producing enzymes

By being sticky and fast

By making sounds

Frogs have long, sticky tongues that can rapidly extend to catch prey. The stickiness helps them hold onto insects and other small animals, which are then pulled back into the mouth for consumption.

16/20

What triggers metamorphosis in frog tadpoles?

Temperature change

Hormonal changes

Food availability

Water levels

Metamorphosis in frog tadpoles is triggered by hormonal changes, specifically the release of thyroxine. This hormone initiates the transformation from a tadpole to an adult frog, involving significant physical and physiological changes.

17/20

What helps frogs to stay moist and avoid dehydration?

Their diet

Their behavior

Their habitat

Their permeable skin

Frogs have permeable skin that allows them to absorb water directly from their surroundings, helping them stay moist and avoid dehydration. This adaptation is essential for their survival, especially in dry environments.

18/20

What is the role of the amplexus in frog reproduction?

Ensures fertilization

Aids in egg protection

Helps in mating calls

Provides nourishment

Amplexus is the mating position of frogs, where the male clasps the female to ensure that his sperm is released over the eggs as they are laid, ensuring fertilization. This behavior increases the chances of successful reproduction.

19/20

What helps frogs to detect changes in their environment?

Their lungs

Their skin

Their sensory organs

Their bones

Frogs have well-developed sensory organs, including eyes, ears, and skin receptors, that help them detect changes in their environment. These organs allow them to respond to threats, find food, and communicate with other frogs.

20/20

Why do frogs have webbed feet?

For gripping prey

For climbing

For swimming

For jumping

Frogs have webbed feet that help them swim efficiently by increasing the surface area of their feet, allowing them to push against the water more effectively. This adaptation is crucial for their aquatic lifestyle.

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