Which of the following processes removes carbon from the atmosphere?

A. putrefaction

B. photosynthesis

C. volcanic eruption

D. burning of fuels

Which of the following cycles involves the process of precipitation and transpiration?

A. water cycles

B. carbon cycle

C. nitrogen cycle

D. oxygen cycle

What is the critical limiting factor for plants below the photic zone in an aquatic ecosystem?

A. availability of nutrients

B. availability of water

C. intensity of light

D. carbon dioxide concentration

Which of the following instruments is used to estimate the number of plants in a habitat?

A. pooter

B. pitfall trap

C. quadrant

D. sweep net

Which of the following statements is true about sandy soil?

A. has limited air space

B. is light and easy to dig

C. drains slowly

D. is heavy and poorly aerated

Which of the following organisms is a primary consumer?

A. dog

B. sheep

C. grass

D. fungus

Study the diagram of a food chain shown and use; it to answer the question.P ---> Q ---> R ---> S ---> TThe organism designated P in the food chain above is normally sustained by energy from

A. sunlight

B. carbohydrates

C. green plants

D. mineral salts

Study the diagram of a food chain shown and use; it to answer the question.P ---> Q ---> R ---> S ---> TWhich of the following statements best describes the organism designated R? It

A. feeds on S

B. is a primary consumer

C. is a producer as well as a consumer

D. is a secondary consumer

Which of the following diseases is not hereditary?

A. Albinism

B. Scabies

C. Haemophilla

D. Colour blindness

The immediate product of meiosis in flowering plants is the

A. sporophyte

B. gametophyte

C. zygote

D. endosperm