Structural Organisation in Animals MCQs

Analyze the following statements regarding morphology and anatomy definitions:

I. Morphology refers to the study of form or externally visible features in plants, microbes, and animals.
II. In plants or microbes, morphology refers to the external appearance of internal organs.
III. In animals, morphology refers to the external appearance of the organs or parts of the body.
IV. The word anatomy is conventionally used for the study of morphology of internal organs in animals.

Consider the following statements regarding the ecology and general physiology of frogs:

I. Frogs can live both on land and in freshwater.
II. Frogs belong to class Amphibia of phylum Chordata.
III. The most common species of frog found in India is Rana tigrina.
IV. Frogs are warm-blooded (homeothermic) animals that maintain a constant body temperature.

Consider the following statements regarding the adaptive mechanisms of frogs:

I. Frogs have the ability to change their skin colour to hide from enemies, which is called camouflage.
II. The protective coloration of changing skin colour in frogs is called mimicry.
III. During peak summer and winter, frogs take shelter in deep burrows to protect themselves from extreme temperatures.
IV. Summer sleep of frogs is known as hibernation, whereas winter sleep is known as aestivation.

Analyze the following statements regarding the physical characteristics and hydration of the frog's skin:

I. The skin of the frog is smooth and slippery due to the presence of mucus.
II. The skin is always maintained in a moist condition.
III. The frog drinks large quantities of water through its mouth to stay hydrated on land.
IV. The frog never drinks water but instead absorbs it through the skin.

Consider the following statements regarding the coloration and main body divisions of the frog:

I. The colour of the dorsal side of the frog's body is generally olive green with dark irregular spots.
II. On the ventral side, the skin is uniformly pale yellow.
III. The body of a frog is divisible into head, neck, and trunk.
IV. A neck and tail are completely absent in the adult frog.

Consider the following statements regarding the external sensory structures on a frog's head:

I. Above the mouth, a pair of nostrils is present.
II. Eyes are flat, sunken, and lack any protective membrane.
III. Eyes are bulged and covered by a nictitating membrane that protects them while in water.
IV. On either side of the eyes, a membranous tympanum (ear) receives sound signals.

Analyze the following statements regarding the structure and function of the frog's limbs:

I. The forelimbs and hind limbs help in swimming, walking, leaping, and burrowing.
II. The hind limbs end in five digits and are larger and more muscular than forelimbs.
III. The forelimbs end in four digits.
IV. Feet have webbed digits that help in swimming.

Consider the following statements regarding the digestive system layout of the frog:

I. The body cavity of frogs accommodates organ systems with well-developed structures and functions.
II. The digestive system consists of an alimentary canal and digestive glands.
III. The alimentary canal is extremely long because frogs are herbivores.
IV. The alimentary canal is short because frogs are carnivores, which reduces the length of the intestine.

Consider the following statements regarding the pathway of food in the digestive tract of a frog:

I. The mouth opens into the buccal cavity.
II. The buccal cavity leads to the oesophagus through the pharynx.
III. The oesophagus is a short tube that opens into the stomach.
IV. The stomach continues as the intestine, rectum, and finally opens outside by the cloaca.

Analyze the following statements regarding the frog's digestive glands and food capture:

I. Liver secretes bile that is stored in the gall bladder.
II. Pancreas, a digestive gland, produces pancreatic juice containing digestive enzymes.
III. Food is captured by the single-lobed, pointed tongue of the frog.
IV. Food is captured by the bilobed tongue.

Which of the above statements are correct?