Heredity and Evolution
The evolution of vegetable broccoli belonging to the cabbage family is an example of:
natural selection
artificial selection
elimination
speciation
artificial selection
Broccoli has been cultivated from wild cabbage by the method of artificial selection by the farmers. Green coloured flowering heads of broccoli are edible. The wild cabbage was bred and selected for this character to get broccoli.
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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 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:
A. Artificial selection
B. Natural selection
C. Accidental selection
D. Random selection
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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