2018 - JAMB Biology Past Questions and Answers - page 6

The hormones function to lower glucose levels in the bloodstream and promote the storage of glucose in fat, muscle, liver and other body tissues.

Blood circulation in human beings is known as double circulation just because the blood is pumped twice ( from two different sections involving Deoxygenated and oxygenated blood) simultaneously through heart, one carries out the pulmonary circulation and other the heart- to- body- circulation.

Unlike the other animals listed, a hen does not have mammary gland

A hygrometer is weather instrument used to measure the amount of humidity in the atmosphere. There are two main types of hygrometers -- a dry and wet bulb psychrometer and a mechanical hygrometer.

Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer.

The absorption is by the process called, Osmosis.... Root hairs are made up of epidermal cells, which are present on the surface of the root, they also increase the surface area for absorption. They absorb minerals by active transport and water by osmosis. These substances then move to the xylem.

Earthworm doesn't have red blood because they do gaseous exchange with the help of skin.

The blood is red due to the presence of hemoglobin in the red blood cell which helps in carrying oxygen

Conjugation consists of the temporary union of two organisms and the exchange of micronuclear elements

Xylem transports water and mineral salts from the roots up to other parts of the plant, while phloem transports sucrose and amino acids between the leaves and other parts of the plant.

The xylem, vessels and tracheid’s of the roots, stems and leaves are interconnected to form a continuous system of water conducting channels reaching all parts of the plants.

saprophytism is the ability of certain plants to live in dead or decaying organic matter.