The type of placentaion shown is

A. axial

B. marginal

C. parietal

D. central

An example of a plant having the placentation shown is

A. allamander

B. hibiscus

C. water lily

D. pride of Barbados

The term caryopsis is used to describe a fruit in which the

A. testa and pericarp are separate

B. seed and endocarp are fused

C. testa and pericarp are fused

D. seed coat and fruit wall are impermeable

The sex of a foetus is determined during

A. meiosis

B. copulation

C. fertilization

D. placentation

Biological growth refers strictly to an increase in the

A. protoplasm of an organism

B. number of organisms

C. size of an organism

D. development of form

The process of walking is under the control of the part of the brain called

A. optic lobe

B. olfactory lobe

C. cerebellum

D. medulla oblongata

The gland directly affecting metabolic rate, growth and development is known as

A. adrenal land

B. thyroid gland

C. mammary gland

D. parathyroid gland

Which of the following ions is involved in the conduction of the nerve impulse?

A. Ca²⁺

B. K⁺

C. H⁺

D. Mg²⁺

The depth of illumination in a water body can be measured with a

A. photometer

B. secchi disc

C. hydrometer

D. anemometer

In a food chain involving a primary producer, a primary consumer as well as a secondary consumer, the sharing of trophic energy is in the form that the

A. the primary consumer has more energy than the primary poducer

B. secondary consumer takes up all the energy contents of the primary consumer

C. energy is shared equally between the three groups of organism

D. secondary consumer gets only a small portion of the energy contained in the primary producer