The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called

A. chemosynthesis

B. photosynthesis

C. anabolism

D. catabolism

Conduction of water and mineral salts through the xylem vessels is enhanced because the xylem cells are

A. thickened with lignin

B. long, narrow tubes placed end to end

C. close to the endodermis

D. centrally placed in the roots

Which of the following factors is likely to increase the rate of transpiration in plants?

A. A reduction in the number of stomata per unit surface area

B. Increase in humidity around the leaves of plants

C. An increase in leaf surface area to volume ratio

D. Removal of leaves from plant

The name of the enzyme that catalyses the conversion of glucose to glucose-6-phosphate at the beginning of glycolysis is

A. phospho-fructokinase

B. glucose isomerase

C. hexokinase

D. glucose-6-kinase

The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is

A. Carbohydrates, fats and oils, water, protein

B. Fats and oils, carbohydrates, protein, water

C. Water, fats and oils, carbohydrates, protein

D. Protein, fats and oils water and carbohydrates

Which of the following substances is not complex carbohydrate?

A. Glycogen

B. Cellulose

C. Starch

D. Glucose

Which of the following associations is an example of epiphytism?

A. Lice in the human hair

B. Mistletoe on citus fruit.

C. Egret on cow

D. Fern on palm tree

Ecology simply means the study of

A. particular species of plants and animals

B. the interrelationship between orgganisms and their environment

C. the properties of a habitat

D. the interrelationship between plants and animals

The maximum size of a population that a given area can support is known as

A. population density

B. carrying capacity

C. population growth

D. maximum population

The producers in a food chain in an aquatic environment are

A. birds

B. phytoplankton

C. zooplankton

D. fishes