A waterlogged habitat with low light penetration and very low quantity of dissolved oxygen best describes a/an habitat

A. estuarine

B. marine

C. sahel savanna

D. swampy

E. tropical rainforest

Deficiency of calcium in a child’s diet causes

A. cretinism

B. goiter

C. kwashiorkor

D. rickets

E. scurvy

Which of these is a direct photosynthetic product?

A. fats

B. glucose

C. latex

D. protein

E. starch

Which of the following is a nitrifying bacterium?

A. Azotobacter

B. Clostridium

C. Nitrobacter

D. Rhizobium

E. Staphylococcus

Ln the process of succession, a climax community is established when

A. a stable community is achieved

B. the colonizers accommodate the new corners

C. the colonizers are wiped out

D. the first inhabitants settle down

E. the new corners dominate the original inhabitants

The speed of wind can be measured with an instrument called

A. anemometer

B. barometer

C. hygrometer

D. photometer

E. thermometer

All these statements are correct about a vein EXCEPT that it

A. carries blood to the heart

B. contains blood at low pressure

C. has no valve

D. possesses fairly thick walls

E. usually carries deoxygenated blood

Tsetse-fly is a vector of a disease known as

A. cholera

B. dysentery

C. elephantiasis

D. malaria

E. trypanosomiasis

Which of the following does NOT occur during photosynthesis?

A. Carbon dioxide is evolved

B. Energy from the sun is utilized

C. Glucose is synthesized

D. Oxygen is given off

E. Split of water

Which of the following is NOT a function of placenta in mammals?

A. absorption of food

B. gaseous exchange

C. removal of wastes

D. secretion of hormones

E. secretion of enzymes.