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1
There is no life on moon because there is no ___________________
Water
Nitrogen
Carbon
Silicate
2
Genetic drift is mechanism of __________________
Replication
Transcription
Evolution
Reproduction
3
An evolutionary process by which new species arise is known as _____________________
Natural selection
Speciation
Geographic isolation
4
Which statement is incorrect?
Blood type is an acquired trait
Pierced ear is an acquired trait.
Eye colour is an inherited trait.
Skin colour is an inherited trait.
5
'Natural selection' selects individuals, which are
most adapted for survival
least adapted for survival
more in number
less in number
6
___________________ variation arises due to mutation and it can account for the creation of a new species.
Germinal
Somatic
Mutative
Evolutionary
7
There was no free oxygen in the early atmosphere because most of it was tied up in ________________________
Ammonia
Methane
Rocks
8
___________traits lead to evolution .
Acquired
Inherited
Natural
9
____________________ is any change in the structure of a gene
Variation
Differentiation
Mutation
10
Assertion: Although living organism always arise from other living organism. Life should certainly have had a beginning.
Reason: The study of the conditions and the mechanisms involved in the creation of most primitive living structures on Earth is actually the problem of origin of life.
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
If Assertion is correct but Reason is incorrect.
If Assertion is incorrect but Reason is correct.
11
Which of the following does not determine human evolution ?
Relationship with other spices
Fossils
DNA sequence
Skin colour
12
If the fossil of an organism is found in the deeper layers of earth, then we can predict that ________________
The extinction of organism has occurred recently
The extinction of organism has occurred thousands of year ago
The fossil position in the layers of earth is not related to its time of etinction
Time of extinction cannot be determined.
13
Assertion: We have lost all the direct evidence of origin of life.
Reason: The perosns responible for proetecting evidences were not skilled.
If both Assertion and Reason are correct , but Reason is not the correct explanation of Assertion.
14
Theory of spontaneous generation was given by __________________
Von Helmont
Pasteur
Redi
None of these
15
Genetic drift can be defined as _________________________
The continental shift of the plates on the Earths surface
Gene flow
Changes in gene pool due to random variation
Movement of individuals from land to water