Question 1 of 20 5,032 total questions
What ecological condition favours the breeding of black flies?
A Fresh water habitat
B Water in ponds and swamp
C Water in small containers
D Fast flowing streams
Soil fertility can be conserved and renewed by
A yearly monocropping
B crop rotation and cover crops
C bush burning to remove unwanted debris
D avoiding artificial manures
Which group of plants would be the first colonizers in an ecological succession changing rocks to soil?
A Mosses
B Ferns
C Lichens
D Grasses
Plants adapted for life in salty marsh are called
A hydrophytes
B xerophytes
C halophytes
D epiphytes
Which of the following instruments is NOT used in measuring abiotic factors in any habitat?
A Microscopic
B Thermometer
C Hygrometer
D Wind vane
Two organisms of different species, living in close association but not dependent on each other are referred to as
A parasites
B commensals
C symbionts
D autotrophs
At which trophic level would the highest accumulation of a non-biodegradable substance occur?
A Primary producers
B Tertiary consumers
C Primary consumers
D Secondary consumers
The most important physical factor which affects an organism living in the intertidal zone of the seashore is
A pH
B salinity
C wave action
D temperature
Important abiotic factors which affects all plants and animals in the habitat are
A temperature and turbidity
B rainfall and relative humididty
C salinity and wind direction
D temperature and rainfall
What is the term used to describe the sum total of biotic and abiotic factors in the environment of the organism?
A Habitat
B Biome
C Ecosystem
D Ecological niche
Carnivorous plants are usually found in areas
A which are deficient of nitrate
B which are deficient of oxygen
C with low pH
D where insects are abundant
What would happen to a man whose pancreas has been surgically removed?
A The level of blood sugar would increase
B The glycogen content of the liver would increase
C His blood pressure would decrease
D His weight would increase appreciably
Which path does sound entering the human ear follow?
A Oval window → ossicles → ear drum
B Ear drum → oval window → ossicles
C Ear drum → ossicles → oval window
D Ossicles → ear drum → oval window
When it is cold, the blood vessels of the skin
A dilates to increase the amount of blood flowing
B constrict to reduced the amount of blood flowing to the skin
C dilate to reduce the amount of blood flowing to the skin
D constrict to increase the amount of blood flowing to the skin
The function of the structure labelled G is to
A carry out initial photosynthesis for the seedlings
B protect the young leaves from mechanical damage
C protect the young leaves from sun light
D protect the young leaves from insects pest
In H, the cotyledons are carried above the soil because
A the epicotyl grows faster than the hypocotyl
B the hypocotyl grows faster than the epicotyl
C both grow at the same rate
D the epicotyl outgrow the radicle
In the mammal, the autonomic nervous system consists of
A sympathetic and parasympathetic system
B brain and spinal nerves
C brain and cranial nerves
D spinal cord and spinal nerves
The main function of the petal of a flower is to
A attract pollination agents
B protect the flower while still in bud
C serve as landing stage for insects
D protect the inner paisr from desiccation
The bright colours of the comb and feathers in the peacock are for
A sex differenciation
B beauty
C courtship
D defence
Which of the following is TRUE of the process of conjugation in paramecium?
A Micronucleus disintegrates
B Each ex-conjugant divides only once
C Macronucleus undergoes division
D Each micronucleus divides twice
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