Heredity and Evolution
The figure below depicts a situation where a rare variation has become common. The green coloured beetle population has become common because it gave them a survival advantage. This is an example of:
Artificial selection
Natural selection
Accidental selection
Random selection
Natural selection
When a population of a particular variant organism increases due to a survival advantage, it is the natural selection.
In this case, green beetles cannot be seen by the crow and therefore, their population has grown compared to the red coloured beetles. Thus, natural selection pressure is exerted by crows.
Natural selection When a population of a particular variant organism increases due to a survival advantage, it is the natural selection.
In this case, green beetles cannot be seen by the crow and therefore, their population has grown compared to the red coloured beetles. Thus, natural selection pressure is exerted by crows.
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Human cells have ______ pair(s) of autosomes.A. 23
B. 2
C. 22
D. 1
According to fossil discovered up to present time, the origin and evolution of man started from:
A. France
B. Java
C. Africa
D. China
Human baby will be a male if its 23rd chromosome pair is:
A. XX
B. XY
C. X
D. XXX
The evolution of vegetable broccoli belonging to the cabbage family is an example of:
A. natural selection
B. artificial selection
C. elimination
D. speciation
In evolutionary terms, we have more in common with a:
A. monkey
B. rat
C. chimpanzee
D. gorilla
The preserved traces of living organisms are known as:
A. Humus
B. Crust
C. Skeleton
D. Fossils
Speciation may take place when _______ is/are combined with geographical isolation.
A. variations
B. genetic engineering
C. cloning
D. duplication
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