Structural Organization in Animals Chapter-Wise Test 10

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about the frog’s nervous system is correct?

Frogs have a central nervous system consisting of a brain and spinal cord.
Frogs do not have cranial nerves.
The cerebellum in frogs is responsible for vision.
The frog’s brain is divided into two regions only.
1

Frogs have a central nervous system that consists of a brain and spinal cord, along with a peripheral nervous system that includes cranial and spinal nerves.

Which reproductive organ in female frogs is responsible for producing eggs?

Oviduct
Cloaca
Ovary
Bidder’s canal
3

The ovaries in female frogs produce eggs, which are later released into water for external fertilization.

Which excretory organ is found in both male and female frogs?

Oviduct
Testes
Kidneys
Bidder’s canal
3

Both male and female frogs have kidneys, which function as excretory organs.

Which of the following statements about the frog’s skeletal system is incorrect?

Frogs have an endoskeleton composed of bones.
The vertebral column in frogs provides body support.
Frog skeletons are entirely made of cartilage.
The skull of frogs is bony and protects the brain.
3

The frog's skeleton is made of bones, except for some cartilaginous structures in the developing tadpole.

Which of the following statements about frog locomotion is incorrect?

Frogs use their hind limbs for jumping.
Frogs have webbed feet that aid in swimming.
Frogs rely only on forelimbs for movement.
Frogs can leap long distances using their muscular legs.
3

Frogs use their hind limbs, not just their forelimbs, for movement, jumping, and swimming.

Which structure in male frogs produces sperm?

Kidney
Testes
Oviduct
Ureter
2

The testes in male frogs produce sperm, which is transported through the urinogenital ducts.

Which of the following statements about frog metamorphosis is incorrect?

Tadpoles have gills for respiration.
Metamorphosis in frogs is controlled by growth hormones.
Tadpoles undergo drastic morphological changes to become adult frogs.
Frogs develop lungs as they transition from tadpoles to adults.
2

Metamorphosis in frogs is primarily controlled by thyroid hormones, not general growth hormones.

Which of the following statements about frog sense organs is incorrect?

The tympanum functions as an external ear.
Frogs lack a well-developed vision system.
Frogs have taste buds on their tongue.
The nictitating membrane protects the frog’s eyes underwater.
2

Frogs have well-developed eyes that help them detect movement and depth.

Which of the following statements about the frog’s excretory system is incorrect?

Frogs have a pair of kidneys for excretion.
Frogs excrete ammonia as their primary waste product.
Urinogenital ducts in male frogs transport both urine and sperm.
The urinary bladder stores urine temporarily before excretion.
2

Frogs are ureotelic, meaning they excrete urea as their primary nitrogenous waste, not ammonia.

Which of the following statements about frog locomotion is correct?

Frogs use only their front limbs for movement.
Hind limbs are muscular and adapted for jumping.
Frogs cannot move on land.
Frogs lack webbed feet.
2

Frogs have strong hind limbs that are adapted for jumping and swimming.

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