Even though some flowering plants contain accessory pigments which give them colours they still contain
the pigment

A. melanin

B. chlorophyll

C. xanthrophyll

D. carotene

E. chlorocruorin.

Which of the following is not regarded as a micro-nutrient or trace element for plant growth?

A. Phosphorus

B. Zinc

C. Boron

D. Silicon

E. Molybdenum

In a water culture experiment a plant showed poor growth and yellowing of the leaves. These symptoms
were probably due to the absence of

A. calcium

B. phosphorus

C. iron

D. zinc

E. copper

The relationship between a herbivore and the bacteria which live in its caecum is known as

A. parasitism

B. symbiosis

C. commensalism

D. saprophytism

E. predation

Autotropic nutrition may be defined in terms of food obtained

A. from other organisms in exchange for some products.

B. by the breakdown of complex substances

C. by an organism utilizing its own store of energy

D. by synthesizing simple substances using energy from an external source

E. in a synthesized form from other living organism.

Which of the following is not classified as a terrestrial habitat?

A. Forest

B. Guinea Savannah

C. Afro Alpine

D. Littoral zone

E. Desert

Which of the following does not contribute to the biomass in an ecosystem?

A. Producers

B. Food chains

C. Consumers

D. Micro-organisms

E. Saprophytes

Which of the following is not a characteristic feature of tropical rain-forest habitat?

A. Trees with longer boles than those in Savannah

B. Fewer canopy strata than the savannah

C. Many more trees and climbers than savannah

D. Plenty of leaf litter on the ground

E. More diverse communities than the savannah

Which of the following factors is not associated with aquatic habitat?

A. Temperature

B. Light intensity

C. Humidity

D. Turbidity

E. Wave action

Terrestrial organisms which are capable of maintaining their body temperature constant within fairly close
limits are referred to as

A. thermoclines

B. homotherms

C. poikilotherms

D. eurytherms

E. stenotherms