For heterotrophic organisms, competition is least caused by the inadequacy of
- A. mates
- B. space
- C. light
- D. nutrients
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
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
The ability of an organism to live successfully in an environment is known as
- A. resistance
- B. competetion
- C. succession
- D. adaptation
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 stem of a typical aquatic plant usually has many
- A. air cavities
- B. intercellular space
- C. water cavities
- D. water conducting cells
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
In man, the ability to roll the tongue is a variation classified as
- A. anatomical
- B. physiological
- C. structural
- D. morphological
A tall plants crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents?
- A. TT, TT
- B. Tt, tt
- C. TT, tt
- D. Tt, Tt
Which of the following is likely to encourage inbreeding in plants?
- A. Dioecious
- B. Protandrous
- C. Monoecious
- D. Hermaphrodite
Which of the following statements is true of blood groups and blood transfusion?
- A. Group O is the universal recipient
- B. Group A can donate to group A only
- C. Group AB is the universal recipient
- D. Group B can donate to group B only
The probability of a baby being a boy or a girl depends on the contribution of the
- A. father's sex cell
- B. father's somatic chromosome
- C. mother's sex cell
- D. mother's X-chromosome
Both recessive and dominant characters are found
- A. on different chromosomes in the cell
- B. at the same locus of a homologous chromosome
- C. at different loci of a homologous chromosome
- D. on the same chromatid in a chromosome
The distribution of plants in a rain forest is governed mainly by
- A. vegetation
- B. soil types
- C. amount of sunlight
- D. rainfall pattern
The hygrometer is used for measuring
- A. relative humudity
- B. specific gravity
- C. rainfall
- D. salinity
A freshwater pond may contain
- A. tadpole, water boatman, leeches and crab
- B. water beetle, shrimps, water snail and water bug
- C. water lily, fish, water scorpion and dragon larva
- D. pon skater, water lily, shark and mosquito larva
The physical space occupied by an organism together with its functional role in community can be described as
- A. environment
- B. biome
- C. niche
- D. habitat
The greatest influence on a stable ecosystem in nature is exerted by
- A. man
- B. pollution
- C. animals
- D. rainfall
The highest percentage of energy in an ecosystem occurs at the level of the
- A. secondary consumer
- B. decomposers
- C. producers
- D. primary consumers
The epiphytic habitat can best be described as
- A. arboreal
- B. estaurine
- C. aquatic
- D. terrestrial
The factor that least affects food shortages in sub-saharan Africa is
- A. flooding
- B. pests
- C. mixed-cropping
- D. drought