Structural Organization in Animals Chapter-Wise Test 9

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about frog metamorphosis is incorrect?

Metamorphosis in frogs is controlled by thyroid hormones.
Frog eggs hatch directly into small frogs without a larval stage.
Tadpoles respire through gills before developing lungs.
Tadpoles undergo morphological changes before becoming adult frogs.
2

Frogs undergo indirect development, where eggs hatch into tadpoles, which later metamorphose into adult frogs.

What is the function of the cloaca in frogs?

Digestion
Excretion and reproduction
Hearing
Gas exchange
2

The cloaca in frogs serves as a common chamber for excretion, reproduction, and digestive waste removal.

Which of the following statements about frog metamorphosis is incorrect?

Tadpoles undergo metamorphosis to become adult frogs.
Thyroid hormones regulate metamorphosis.
Tadpoles respire using gills before developing lungs.
Metamorphosis in frogs is controlled by the adrenal gland.
4

Metamorphosis in frogs is primarily controlled by thyroid hormones, not the adrenal gland.

Which type of respiration is used by frogs when they are both on land and in water?

Pulmonary and cutaneous respiration
Buccal and branchial respiration
Pulmonary and gill respiration
Only pulmonary respiration
1

Frogs use pulmonary respiration on land (lungs) and cutaneous respiration in water (skin).

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

The thyroid gland regulates metamorphosis in frogs.
Frogs do not have an adrenal gland.
The pancreas is not an endocrine gland in frogs.
The pituitary gland only controls digestion.
1

The thyroid gland plays a crucial role in regulating metamorphosis in frogs, controlling the transition from tadpole to adult.

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

Frogs have a pair of kidneys for excretion.
Frogs excrete urea as their primary waste product.
The urinary bladder stores urine temporarily.
Frogs excrete solid waste through the skin.
4

Frogs do not excrete solid waste through their skin; they excrete liquid nitrogenous waste through their kidneys and cloaca.

Which of the following statements about frog reproduction is correct?

Fertilization is internal
Fertilization is external
Fertilization occurs in the ovary
Male frogs lay eggs
2

Fertilization in frogs is external, occurring in water where the male fertilizes the eggs laid by the female.

Which type of reproduction is found in frogs?

Asexual reproduction
Viviparous reproduction
Oviparous reproduction
Binary fission
3

Frogs are oviparous, meaning they lay eggs that hatch into tadpoles.

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

Frogs exhibit external fertilization.
Female frogs lay eggs in water.
Frogs undergo direct development without a larval stage.
Male frogs have vocal sacs used during mating.
3

Frogs undergo indirect development with a larval stage (tadpole) before transforming into an adult.

Which of the following statements about frog locomotion is correct?

Frogs have powerful hind limbs adapted for jumping.
Forelimbs are longer than hind limbs to help with movement.
Frogs use only their front limbs for swimming.
Frogs cannot move on land.
1

Frogs have strong, muscular hind limbs that help them jump on land and swim in water.

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