Question 1 of 20 5,032 total questions
In genetics, linkages refer to the linking of genes of the
A same chromosomes
B different chromosomes
C same nucleus
D different nuclei
Which of the following statements is not a reason for conserving wildlife?
A Attraction of tourists into the country
B Serving as a source of food
C Serving as a source of income
D increasing the amount of rainfall
Which of the following human activities would help prevent endangered species from extinction?
A Uncontrolled killing of species
B Regular clearing of the forest vegetation
C Temporary maintenance of species in zoological gardens
D Regular irrigation of their natural habitats
The absence of alimentary canal in the parasitic flatworm can be attributed to the fact that
A its body does not feed
B it has no enzymes
C its body absorbs digested food
D it has suckers on the scolex
The following organisms are pests of plants except
A birds
B nematodes
C bacteria
D rodents
Ascaris lumbricoides is a parasitic
A flat worm
B round worm
C arthropod
D elastic worm
Rhizobium which lives in the root nodules of leguminous plants is an example of the association known as
A commensalism
B epiphytism
C mutualism
D saprophytism
The main reason for immunizing children is to
A destroy pathogens in their bodies
B increase the production of white blood cells
C stimulate the production of antibodies
D simulate the production of antigens
A pyramid of numbers is constructed by
A comparing living and non-living things
B measuring productivity
C conducting census
D labelling the living organisms
The bacteria that reduce nitrates in the soil into gaseous nitrogen are referred to as
A nitrifying bacteria
B denitrifying bacteria
C putrefying bacteria
D saprophytic bacteria
The frog is considered a better swimmer than the toad because it
A has more pronounced webbed digits
B has much longer and stronger hind limbs
C lives in water most of the time
D is more streamlined than the toad
The producers in a food chain in an aquatic environment are
A birds
B phytoplankton
C zooplankton
D fishes
The maximum size of a population that a given area can support is known as
A population density
B carrying capacity
C population growth
D maximum population
Ecology simply means the study of
A particular species of plants and animals
B the interrelationship between orgganisms and their environment
C the properties of a habitat
D the interrelationship between plants and animals
Which of the following associations is an example of epiphytism?
A Lice in the human hair
B Mistletoe on citus fruit.
C Egret on cow
D Fern on palm tree
Which of the following substances is not complex carbohydrate?
A Glycogen
B Cellulose
C Starch
D Glucose
The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is
A Carbohydrates, fats and oils, water, protein
B Fats and oils, carbohydrates, protein, water
C Water, fats and oils, carbohydrates, protein
D Protein, fats and oils water and carbohydrates
The name of the enzyme that catalyses the conversion of glucose to glucose-6-phosphate at the beginning of glycolysis is
A phospho-fructokinase
B glucose isomerase
C hexokinase
D glucose-6-kinase
Which of the following factors is likely to increase the rate of transpiration in plants?
A A reduction in the number of stomata per unit surface area
B Increase in humidity around the leaves of plants
C An increase in leaf surface area to volume ratio
D Removal of leaves from plant
Conduction of water and mineral salts through the xylem vessels is enhanced because the xylem cells are
A thickened with lignin
B long, narrow tubes placed end to end
C close to the endodermis
D centrally placed in the roots
Next
Question Navigator
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
