Wind pollinated flowers usually have

A. rough pollen grains

B. sticky stigmas

C. small and short stigmas

D. long styles

The components of castor oil seed and the maize grain are similar EXCEPT for the

A. number of cotyledons

B. location of the embryo

C. number of radicles

D. number of plumules

A corn differs from a bulb in that

A. its stem is the main food storage organ

B. it has a flattened discshaped stem

C. buds are absent in the axils of the leaves

D. adventitious roots are present

Exponential increase in the population of an organism is a characteristic feature off

A. binary fission

B. sexual reproduction

C. budding

D. vegetative propagation

The irreversible life process by which new protoplasm is added to increase the size and weight of an organism can be termed

A. anabolism

B. catabolism

C. growth

D. development

Fruit enlargement can be induced by spraying young ovary with

A. cytokinin, abscisic acid and ethylene

B. gibberellin, ethylene and abscisic acid

C. auxin, abscisic acid and ethylene

D. auxin, cytokinin and gibberellin

A fundamental similarity between nervous and hormonal system is that both

A. involve chemical transmission

B. have widespread effects

C. shed chemicals into the blood stream

D. evoke rapid responses

The region that control most of the unconscious processes of a mammalian body is the

A. cerebellum

B. cerebrum

C. spinal cord

D. medulla oblongata

During cell division, the two strands of chromosomes are joined at a point called

A. spindle

B. chromatid

C. centromere

D. aster

When the two alleles present in an organism are of the same type, the genotype is described as

A. heterozygous

B. heterogamous

C. homozygous

D. homologous