Heredity and Evolution
Speciation may take place when _______ is/are combined with geographical isolation.
variations
genetic engineering
cloning
duplication
variations
Variations when combined with geographical isolation ensures that only the organisms that have well-adapted to the changing conditions will survive. This can lead to the emergence of a new species (well-adapted organisms), through a process called speciation.
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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
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
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