In man, the ability to roll the tongue is a variation classified as

A. anatomical

B. physiological

C. structural

D. morphological

Darwin is considered the first scientist who correctly explained the theory of

A. special creation

B. spontaneous generation

C. use and disuse

D. organic evolution

The stem of a typical aqautic plant usually has many

A. air cavities

B. intercellular space

C. water cavities

D. water conducting cells

The role of the male adult honey bee is to

A. clean the hive

B. ventilates the hive

C. mate with the queen

D. care for the young

The ability of an organism to live successfully in an environment is known as

A. resistance

B. competetion

C. succession

D. adaptation

The most important adaptation of xerophytes is the ability of the protoplasm to

A. resist being damaged by loss of water

B. store sugar and minerals in the vacuoles

C. absorbs water and swell

D. shrink from the cell wall

A green snake in green grass is able to escape notice from predators because of its

A. disruptive colouration

B. counter shading

C. warning colouration

D. cryptic colouration

For heterotrophic organisms, competition is least caused by the inadequacy of

A. mates

B. space

C. light

D. nutrients