The part labelled II is the

A. fenestra ovalis

B. middle ear canal

C. internal auditrory meatus

D. ear ossicles

When specimen X is mixed with few drops of iodine solution, the appearance of a blue-black colour confirms that X is

A. galactose

B. starch

C. sucrose

D. glucose

The structure above represents a

A. caudal vertebra

B. lumbar vertebra

C. thoracic vertebra

D. cervical vertebra

Blood vessel usually pass through the structure labelled

A. III

B. II

C. V

D. IV

Salts and water are absorbed in the roots and transported to leaves by

A. diffusion through the xylem tissues

B. osmosis through the phloem tissues

C. diffusion through the phloem tissues

D. osmosis through the xylem tissues

The number of plants species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp?

A. 35%

B. 16%

C. 46%

D. 23%

Carbon (IV) oxide content of the atmosphere is least affected by

A. cutting down and clearing of forests

B. forest fires

C. burning of fossil fuels

D. plant and animal respiration

The factor that least affects food shortages in sub-saharan Africa is

A. flooding

B. pests

C. mixed-cropping

D. drought

The epiphytic habitat can best be described as

A. arboreal

B. estaurine

C. aquatic

D. terrestrial

The highest percentage of energy in an ecosystem occurs at the level of the

A. secondary consumer

B. decomposers

C. producers

D. primary consumers