Structural Organization in Animals
Test 5

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following tissues is NOT found in the frog’s heart?

Epithelial tissue
Connective tissue
Muscular tissue
Nervous tissue
1

The frog’s heart is composed of connective, muscular, and nervous tissues, but not epithelial tissue.

What is the mode of fertilization in frogs?

Internal fertilization
External fertilization
Parthenogenesis
Budding
2

Frogs undergo external fertilization, where the male fertilizes the eggs in water.

Which structure in a frog's body is responsible for receiving sound vibrations?

Nictitating membrane
Tympanum
Olfactory lobes
Vocal sacs
2

The tympanum is the external ear structure in frogs that receives sound vibrations and transmits them to the inner ear.

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

The pancreas secretes digestive enzymes.
The liver secretes bile, which is stored in the gall bladder.
The stomach leads directly to the cloaca without an intestine.
Frogs capture food using their bilobed, sticky tongue.
3

The stomach does not lead directly to the cloaca; food passes through the intestine for digestion and absorption before reaching the cloaca.

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

Frogs have an endoskeleton made primarily of bones.
Frogs have an exoskeleton for protection.
The skeleton of frogs is composed entirely of cartilage.
Frogs lack a vertebral column.
1

Frogs have an endoskeleton composed mainly of bones, providing structural support and aiding in movement.

Which of the following is absent in frogs?

External ears
Tympanum
Nictitating membrane
Forelimbs
1

Frogs lack external ears, but they have a tympanum for receiving sound signals.

Which of the following statements about frog respiration is TRUE?

Frogs use gills for respiration throughout their life.
Frogs respire only through lungs.
Frogs respire through skin, lungs, and buccal cavity.
Frogs can only breathe in water.
3

Frogs use their skin (cutaneous respiration), lungs (pulmonary respiration), and buccal cavity for breathing at different stages of life.

What is the function of the ureters in male frogs?

Transport urine only
Transport sperm only
Transport both urine and sperm
Transport bile
3

In male frogs, ureters function as urinogenital ducts, transporting both urine and sperm.

Which of the following structures helps frogs during swimming?

Forelimbs
Webbed feet
Vocal sacs
Nostrils
2

Frogs have webbed feet that help them propel through water while swimming.

Which of the following statements about frog excretion is correct?

Frogs excrete uric acid as their primary waste product.
Frogs have a pair of kidneys that help in excretion and osmoregulation.
The urinary bladder of a frog is absent.
Frogs excrete solid waste in the form of ammonia.
2

Frogs excrete urea (not uric acid or ammonia) and have kidneys that help in excretion and osmoregulation.

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