Structural Organization in Animals Chapter-Wise Test 7

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which chamber in a frog’s heart receives deoxygenated blood?

Left atrium
Right atrium
Ventricle
Conus arteriosus
2

The right atrium of the frog’s heart receives deoxygenated blood from the body through the vena cava.

Which of the following features helps frogs in camouflage?

Tympanum
Nictitating membrane
Mimicry
Webbed feet
3

Frogs use mimicry to blend into their surroundings, helping them avoid predators.

Which organ in a frog acts as the site for nitrogenous waste filtration?

Lungs
Kidneys
Liver
Heart
2

The kidneys filter nitrogenous waste from the blood and help maintain osmoregulation.

Which part of a frog’s nervous system controls involuntary actions?

Cerebrum
Cerebellum
Medulla oblongata
Olfactory lobes
3

The medulla oblongata controls involuntary actions like heartbeat and respiration in frogs.

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

Frog skin is highly vascularized and helps in respiration.
Frogs have dry, scaly skin to prevent water loss.
The skin of frogs contains mucus glands.
Frog skin plays a role in camouflage.
2

Frog skin is moist and lacks scales, allowing cutaneous respiration and water absorption.

Which of the following statements about the nervous system of frogs is incorrect?

Frogs have a well-developed brain with forebrain, midbrain, and hindbrain.
Frogs have 10 pairs of cranial nerves.
The spinal cord extends throughout the length of the body.
Frog brains contain optic lobes responsible for vision.
2

Frogs have 10 pairs of cranial nerves, not 12 as seen in mammals.

Which part of the frog's digestive system is responsible for nutrient absorption?

Stomach
Liver
Small intestine
Large intestine
3

The small intestine contains villi and microvilli that absorb nutrients from digested food.

Which of the following statements about frog reproduction is incorrect?

Male frogs have vocal sacs to attract females during mating.
Frogs undergo external fertilization.
Frogs reproduce through asexual reproduction.
Female frogs lay eggs in water.
3

Frogs reproduce sexually through external fertilization, where males fertilize eggs in water.

Which hormone in frogs is responsible for regulating calcium metabolism?

Thyroxine
Adrenaline
Parathyroid hormone
Insulin
3

The parathyroid hormone regulates calcium metabolism and maintains calcium levels in frogs.

Which part of the frog’s excretory system temporarily stores urine?

Kidney
Ureter
Urinary bladder
Cloaca
3

The urinary bladder stores urine temporarily before it is excreted through the cloaca.

Performance Summary

Score:

Category Details
Total Attempts:
Total Skipped:
Total Wrong Answers:
Total Correct Answers:
Time Taken:
Average Time Taken per Question:
Accuracy:
0