Frogs are poikilormic animals. This means that y have a fluctuating body temperature which varies with environmental conditions, or y lack constant body temperature.

Frogs show external fertilization. This process takes place in water. The development of frogs involves a larval stage called tadpole. Tadpoles are restricted to water and later metamorphosize into an adult frog.

Frogs have ability to change ir color to defend mselves from predators. This phenomenon is known as camouflage and protective coloration using which it hides in its surroundings is knows as mimicry.

Bile is stored in gall bladder of frog after it has been secreted by liver. Bile is a greenish-yellow fluid that emulsifies fats. Bidder?s canal is a part of male reproductive system of frogs.

Frogs are beneficial for farming as y feed on insects and hence protect agricultural crop. They are an essential part of food web and hence maintain ecological balance. They are not herbivores. Frog legs can be eaten.

The vascular system in cockroach is of open type. They have poorly developed blood vessels which open up into haemocoel, where visceral organs are located. The hemolymph is colorless and contains hemocytes and plasma.

Frogs have simple eyes. This means that ir eyes are made of single units each. Compound eyes are made of several ommatidia and are characteristic of arthropods, annelids and mollusks.

Cockroaches are dioecious. This means that male and female reproductive organs of cockroach are present separately. Hence, y are not bisexual, hermaphrodite and monoecious as se have both organs in same animal.

Frogs have specialized vein connections between intestine and liver and as well as between kidneys and lower parts of frog body, known as hepatic and renal portal systems. They have a lymphatic system and nucleated erythrocytes.

The question mark in given figure represents Malpighian tubules. They are present at junction of midgut and hindgut and are 100-150 in number. They help in removal of excretory products from haemolymph, thus y help in excretion. The correct labelling of diagram is as shown below: