Primary consumers are found in
- A. 1, 2 and 3
- B. 1, 3 and 7
- C. 2, 3 and 7
- D. 2, 4 and 5
The biomass is likely to increase in the sequence
- A. 1→2→4→5
- B. 1→3→4→5
- C. 3→5→6→7
- D. 5→4→3→1
The habitat of the cysticercus of taenia solium is
- A. Alimentary canal of cattle
- B. Muscles of pig
- C. Alimentary canal of pig
- D. Muscles of cattle
The most important environment factor which epiphytes in the rain forest compete for is
- A. water
- B. nutrients
- C. light
- D. cabinet minister
- E. space
The loud cry made by a brooding hen when a predator is around is meant to
- A. alert the poultry attendants
- B. attract cocks to come and fight the predator
- C. advertise the boundaries of its territory to intruders
- D. warn its chicks and other chickens of impending danger
Which of the following is one of Lamarck’s theories?
- A. Some variations are more favourable to existence in a given environment than others
- B. All living organisms are constantly involved in a struggle to existence
- C. The size of a given population remains fairly constant
- D. New species originates through the inheritance of acquired traits
The least adaptive feature of aboreal life is the
- A. possession of fouur limbs
- B. possession of claws
- C. development of long tail
- D. shading of coat colour
The very bright colours in some types of mushroom
- A. are warning that they may be poisonous
- B. indicate they are very taste
- C. attract potential transporters of the spores
- D. perform the same function as bright colours in flowers
From evolutionary standpoint , the older a fossil-bearing rocks is, the more likely it is to contain
- A. aves as opposed to amphibians
- B. invertebrates as opposed to vertebrates
- C. angiosperms as opposed to algae
- D. vertebrates as opposed to invertebrates
The biological factor that is unique to each individual is the
- A. DNA
- B. eye colour
- C. blood group
- D. RNA
If the offspring of a cross between a brown mouse (bb) and a black mouse (BB) are allowed to interbreed, how many different genotypes would result?
- A. 2
- B. 3
- C. 4
- D. 5
Which of the following characterizes the white mangrove?
- A. Prop roots
- B. Buttress roots
- C. Breathing roots
- D. Stilt roots
The sign + is used to indicate an association where an organism gains, while 0 is used where an organism is unaffected. An association indicated as +0 is known as
- A. predation
- B. commensalism
- C. parasitism
- D. competition
A soil consisting of alumina and iron (II)oxide is known as
- A. loamy soil
- B. clayey soil
- C. laterite
- D. podzol
Vaccination is carried out in order to
- A. check the production of poison
- B. increase the activity of white blood cells
- C. increase the number of red blood cells
- D. stimulate the production of antibodies
Floating microscopic heterotrophs are mostly grouped as
- A. phytoplankton
- B. zooplankton
- C. microbes
- D. nekton
The construction of dams may lead to an increase in the prevalence of
- A. typhoid fever, measles and yellow fever
- B. tuberculosis, leprosy and trypanosomiasis
- C. guinea worm, malaria and tuberculosis
- D. malaria, bilharziasis and onchocerciasis
The structure labelled II articulates with III to form
- A. sliding joint
- B. hinge joint
- C. pivot joint
- D. ball-and-socket joint
Th chitin in the exoskeleton of many arthropods is strengthened by
- A. calcium compounds
- B. organic salts
- C. lipids
- D. proteins
In mammals, the organ which performs digestive and endocrine functions is the
- A. liver
- B. pancreas
- C. gastric gland
- D. salivary gland