Classes of Animals MCQs with Answers

The life cycle of butterfly is?

• A.Eggs → nymph → adult → butterfly
• B.Eggs → pupa → caterpillar → butterfly
• C.Eggs → caterpillar → pupa → butterfly
• D.Eggs → larva → nymph → butterfly

Which one of the following coelenterates is also called Portuguese man of war?

• A.Obelia
• B.Hydra
• C.Physalia
• D.Aurelia

Ampullae of Lorenzini is closely associated to ?

• A.Temperature
• B.Pressure
• C.Electric fields
• D.Salinity

The physoclistous swim bladder is attached to the _ with pneumatic duct?

• A.Oesophagus
• B.Stomach
• C.Intestine
• D.None of these

Grey crescent in Ascidians cell gives rise to?

• A.Epidermis
• B.Neural tube
• C.Notochord
• D.Gut lining

Larva of Anopheles mosquito floats in water _?

• A.Vertically with head downward
• B.Horizontally with tail exposed in air
• C.Horizontally with head exposed in air
• D.Vertically with tail downward

Countercurrent exchange in the fish gill helps to maximize which of the following?

• A.Active transport
• B.Osmosis
• C.Diffusion
• D.Facilitated diffusion

In _ development, the blastopore becomes the mouth.

• A.Deuterostome
• B.Blastula
• C.Protostome
• D.Gastrula

Which are smaller than many protists but are truly multicellular and have specialized organ systems?

• A.Rotifers
• B.Tardigrades
• C.Nematodes
• D.Planarians

The heart of fishes receives _?

• A.Oxygenated blood
• B.Mixed blood
• C.Deoxygenated blood
• D.No blood