|
What are homologous structures?
|
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1
|
1379
|
September 23, 2016
|
|
A very small population of a species faces a greater threat of extinction than a larger population. Provide a suitable genetic explanation
|
|
0
|
4134
|
September 23, 2016
|
|
In human beings, the statistical probability of getting either a male or female child is 50 : 50. Give a suitable explanation
|
|
0
|
5721
|
September 23, 2016
|
|
Why do all the gametes formed in human females have an X chromosome?
|
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0
|
3444
|
September 23, 2016
|
|
Mention three important features of fossils which help in the study of evolution
|
|
0
|
5166
|
September 23, 2016
|
|
Do genetic combination of mothers play a significant role in determining the sex of a newborn?
|
|
0
|
3264
|
September 23, 2016
|
|
How is the sex of a newborn determined in humans?
|
|
0
|
3927
|
September 23, 2016
|
|
A woman having blood group B marries a man having blood group A and they have four offspring
|
|
1
|
9354
|
September 23, 2016
|
|
Guinea pig having black colour when crossed with guinea pig having same colour produced 80 offspring out of which 60 were black and 20 were white
|
|
1
|
9743
|
September 23, 2016
|
|
In dogs, the barking trait is dominant over the silent trait and erect ears are dominant over drooping ears
|
|
1
|
15470
|
September 23, 2016
|
|
The genotype of green stemmed tomato plant is denoted as GG and that of purple stemmed tomato plant as gg
|
|
1
|
16041
|
September 23, 2016
|
|
What are the three Ways which can produce variant genotypes in the environment?
|
|
0
|
3303
|
September 23, 2016
|
|
What is molecular phylogeny?
|
|
0
|
5714
|
September 23, 2016
|
|
Name any five vegetables generated from a common ancestor through artificial selection
|
|
1
|
6134
|
September 23, 2016
|
|
What is geographical isolation?
|
|
1
|
6122
|
September 23, 2016
|
|
Give differences between :
|
|
1
|
2946
|
September 23, 2016
|
|
Why do we say that homozygous plants produce pure progeny?
|
|
1
|
3510
|
September 23, 2016
|
|
"The traits acquired during the lifetime of an individual are not inherited". Give reason and justify this statement giving two examples
|
|
0
|
5065
|
September 23, 2016
|
|
What are fossils ? List two informations provided by the fossils about the evolution
|
|
0
|
641
|
September 23, 2016
|
|
Distinguish between inherited and acquired characters. Give one example for each type
|
|
0
|
3535
|
September 23, 2016
|
|
Differentiate between dominant and recessive traits
|
|
1
|
5538
|
September 23, 2016
|
|
Name the scientist who worked out the rules of inheritance
|
|
1
|
1946
|
September 23, 2016
|
|
In Pea plant round seed is dominant over the wrinkled. If a cross is carried between these two plants, give answer to the following questions
|
|
1
|
11480
|
September 23, 2016
|
|
State the term given to the structure shown in figures given below?
|
|
1
|
1076
|
September 23, 2016
|
|
Give appropriate terms for the following:
|
|
1
|
5092
|
September 23, 2016
|
|
What are fossils?
|
|
1
|
6373
|
September 23, 2016
|
|
Name the scientist who gave the idea of evolution of species by natural selection
|
|
1
|
2333
|
September 23, 2016
|
|
Explain why the wing of a bat and the wing of bird are considered to be analogous organs
|
|
1
|
1151
|
September 23, 2016
|
|
What are fossils ? How are they formed? Name two methods for the determination of age of a fossil
|
|
0
|
3721
|
September 23, 2016
|
|
"Organs or features may be adopted to perform new functions during evolution."
|
|
1
|
2960
|
September 23, 2016
|