The capture and digestion of insects by a pitcher plant is a special form of nutrition termed
- A. autotrophic
- B. heterotrophic
- C. chemosynthetic
- D. saprophytic
The presence of endoskeleton is characteristic of
- A. invertebrata
- B. vertebrata
- C. insecta
- D. coelenterata
The mammalian erythrocytes differ from the leucocytes at maturity because the erythrocytes are
- A. discoid and nucleated
- B. discoid and enucleated
- C. amoeboid and nucleated
- D. amoeboid and enucleated
Examples of organisms in which extracellular digestion occurs are?
- A. fungus, loranthus and housefly
- B. rhizopus, sponges and earthworm
- C. roundworm, tapeworm and hydra
- D. rhizopus, housefly and hydra
Animals aestivate when the environment in which they live becomes
- A. hot and dry
- B. cold and wet
- C. warm and humid
- D. windy and snowy
The structure that is common in the embryos of mammals, amphibians, birds, fishes and reptiles and which is an evidence of their common ancestry is the
- A. eye
- B. chorion
- C. allantois
- D. gill-silts
A feature of the caste system of bees and termites ia that
- A. the workers are sterile
- B. the kings are bigger than the queens
- C. only the worker perform duties
- D. nuptial flight is performed by all members
Birds which are large with long straight pointed beaks, long necks and long legs are likely to be
- A. insect eaters
- B. fish catchers
- C. nectar feeders
- D. fruit eaters
The carnassial teeth of a carnivorous animal consist of the
- A. last upper premolar and the first lower molar
- B. last upper molar and the last lower molar
- C. first upper premolar and the lower molar
- D. first upper molar and the first lower molar
In his theory of evolution, Darwin implied that
- A. the struggle for existence among living organisms is sporadic
- B. the most successful organisms are those that best adapt to their environment
- C. organs of the body which are not regularly used by an organism will disappear
- D. any traits acquired by an organism during its lifetime can be passed on its offspring
In a population study using the transect method, a student is likely to record the highest number of species in?
- A. a tropical rain forest
- B. a guinea savanna
- C. a sahel savanna
- D. an estuarine swamp
The excessive use of agro-chemicals could lead to the pollution of
- A. the lithosphere
- B. the atmosphere
- C. fresh water
- D. space
The addition of lime to clayed soil serves to
- A. aid water retention
- B. close up the texture
- C. prevent water logging
- D. improve capillary action
The supporting tissue in xylem is most poorly developed in
- A. mangrove swamp plants
- B. grassland plants
- C. submerged water plants
- D. desert plants
In a field experiment, the frequency of water leaf was observed to be 48 after 20 tosses of a 2m2 quadrat. What is the density of the plants in the field?
- A. 1.2 per m2
- B. 2.4 per m2
- C. 4.8 per m2
- D. 9.6 per m2
A step in the movement of energy through an ecosystem is a description that best fits the term
- A. food chain
- B. trophic level
- C. pyramid of numbers
- D. food web
The physical and climatic factors of a region primarily determine the
- A. kinds of animal inhabiting the area
- B. types of plants found in the area
- C. nature of the soil in that region
- D. community of organisms in the region
Plants tend to prevent overcrowding by means of efficient
- A. water uptake
- B. seed germination
- C. pollination
- D. seed dispersal
The most common means of transmiting the Acquired Immune Deficiency Syndrome (AIDS) is
- A. from mother to child
- B. through blood transfusion
- C. through sexual intercourse
- D. through the sharing of needles
The community of plants in which the same species occur from year to year is the
- A. annual species
- B. pioneer vegetation
- C. perennial species
- D. climax vegetation
one of the adaptation of life on trees by a monkey is its possession of digits which are
- A. extensible
- B. big
- C. opposable
- D. long