Question 1 of 20 2,099 total questions
The following observations concerning succession are true except that the
A pioneer community has fewer species
B middle stages communities are most diverse
C max community has the greatest number of species
D total biomass of the community increases as succession progresses
The effects of environmental degradation caused by human activities can be controlled by the following measures except
A reclaiming the land
B converting mining pits into fish ponds
C resettling indigenous inhabitants
D educating people
The speed of the flow of water in a river is faster in the middle than along the banks due to
A differences to turbidity at different parts of the river
B the abundance of fishes and other organisms along the bank
C reduced force of gravity in the middle portion of the river
D resistance offered by the wall of the banks.
Shrubs do not survive on newly weathered soils because
A the top soil is shallow
B drainage on such soil is poor
C humus is absent from the soil
D the soil tends to be sandy
Pond weeds normally lack thick layers of cuticle because
A their system of photosynthesis is not efficient
B there is no danger of becoming desiccated
C their leaves are either dissected or n bon-shaped
D there are numerous stoma a on their upper epidermis
Which of the following statements about the transfer of energy in the ecosystem is correct?
A energy increases at high trophic levels
B More organisms can be supported at higher levels
C There are fewer organisms at top tropic levels
D Energy is lost at each trophic level
What would be the effect of taking the lion out of the web?
A The number of organisms at each trophic level would increase
B Man would occupy the apex of the web
C There would be more rabbit in the web
D The energy reaching the remaining trophic would be increase
Tertiary consumers within the web are
A cat and lion only
B Man and lion only
C man and cat only
D man, cat and lion
Which of the following instruments is used to measure wind speed?
A Thermometer
B Barometer
C Hygrometer
D Anemometer
Which of the following physical actors is likely to affect the distribution of plants in a pond?
A light
B Humid
C Wind
D Temperature
A community is best described as
A living things in a habitat interacting with the non-living part of the environment
B the total number of individuals of one species of organisms living in a particular habitat
C populations of different species living together and interacting with each other in one habitat
D the individuals of a particular group living together in an area and sharing the same resources
The impedance of the concentration of chloroplast in the palisade layer of the leaf is for maximum exposure to
A carbon dioxide
B light
C water
D oxygen
Filaments of Spirogyra placed in a beaker of water in a dark cupboard died because
A the filaments could not photosynthesize
B conjugation could not take place
C the temperature was too high
D the plant was overflooded
Analysis of the gut content of an animal showed that it contained small pieces of bone, seeds. roughages and insects. The animal is likely to be a/an.
A carnivore
B herbivore
C insectivore
D omnivore
Which of the following food substances gives the least amount of calories?
A Rice
B Groundnuts
C cabbage
D Egg yolk
An example of a dehiscent fruit is
A crotolaria
B tomato
C mango
D orange
The part of the young root that pushes its way through the soil is the
A root hair
B tap root
C root cap
D lateral root.
The process by which flowers produce fruit without the process of fertilization is called
A viviparity
B parthenocarpy
C propagation
D metamorphosis
The eyes can properly focus images of objects of various distances on the retina by a process called
A refraction
B reflection
C accommodation
D correction
Which of the following processes is not an example of a reflex ac ion?
A Blinking of the eye
B Reading
C Beating of the heart
D Sneezing
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