Use the diagram above that shows the effect of nitrates on water bodies Study it carefully and answer the question(s) below

Another cause that could lead to the phenomenon in the diagram is

A. exhaust from cars

B. oil spillage

C. dumping of sewage

D. excess rainfall

The illustration above represents a cross between a colour blind male and normal female.
Study it carefully and answer the questions.

What is the genotype ratio of carrier females to normal males in the cross?

A. 1:1

B. 2:3

C. 3:4

D. 4:1

Which of the genotypes are carriers of colour blindness?

A. 1 and 11 only

B. 1 and 111 only

C. 11 and 111 only

D. 1, 11 and 111 only

The type of placentation illustrated in the diagram above is

A. marginal

B. perietal

C. axile

D. basal

Plant A was seen to appear as Plant B after seven hours
Study the above diagrams carefully and answer the questions.

The term that can be used to describe what happened to Plant A after seven hours is

A. wilting

B. competition

C. transpiration

D. Osmosis

The environmental factors responsible for the condition in plant B are

A. low humidity and low temperature

B. high humidity and low temperature

C. low humidity and high temperature

D. high humidity and high temperature

Study the diagram above and answer the question.

A decrease in the number of 11 will result in

A. an increase in urine production

B. an increase in energy production

C. a decreased population

D. decreased immunity

The major problem experience by organisms living in small water bodies is

A. drying up

B. oxygen deficiency

C. scarcity of food

D. wave action

The capillarity of a soil refers to

A. the particle size of soil

B. how easily water passes through soil

C. how well water rises up in soil

D. proportion of water a soil holds

An organism at the start of a food chain which provides the total input energy into an ecosystem is the

A. sun

B. producer

C. consumer

D. decomposer