In this article you will get the clue that from where and how the questions are being framed from the chapter Heredity and Evolution. The experts of jagranjosh.com have full confidence that you will not miss any of the questions in the board exam as well as in competitive exams from this chapter if you will keep the following terms / question in your mind while studying
A brain cell?
A sperm in the testes?
An egg which has just been produced by the ovary?
A skin cell?
A fertilized egg?
Match the following
Column I Column II
Fossil A famous evolutionist
A theory of evolution Survival of fittest
Probable ancestor of birds petrified remains of prehistoric life
Charles Darwin father of genetics
Gregor mendel archaeopteryx
Match the following:
Sterile flowers Kohlrabi
Arrested flower development Cauliflower
Swollen parts Broccoli
Larger leaves Kale
Male- IA I B
Female- IO IA
Q. Select the correct statement:
a. Tendril of a pea plant and phylloclade of Opuntia are homologous
b. Tendril of a pea plant and phylloclade of Opuntia are analogous
c. Wings of birds and limbs of lizards are analogous
d. Wings of birds and wings of bat are homologous
Q. In which of the following ways is natural selection not analogous to artificial selection ?
a .Natural selection depends upon the presence of variation, artificial selection does not.
b. Natural selection occurs within populations, artificial selection does not.
c. With natural selection 'picking' is due to the fit of an organism with its environment whereas in artificial selection, the breeder 'picks' which organisms will breed.
d. There is a limit to how much change can be brought about by natural election, no such limit exists for artificial selection.
Q. Select the statements that describe characteristics of genes :
i. Genes are specific sequence of bases in a DNA molecule
ii. A gene does not code for proteins
iii. An individuals of a given species, a specific gene is located on a particular chromosome
iv. Each chromosome has only one gene
a. (i) and (ii)
b. (i) and (iii)
c. (i) and (iv)
d. (ii) and (iv)
Q. New species may be formed if
i. DNA undergoes significant changes in germ cells
ii. chromosome number changes in the gamete
iii. there is no change in the genetic material
iv. mating does not take place
a. (i) and (ii)
b. (i) and (iii)
c. (ii), (iii) and (iv)
d. (i), (ii) and (iii)
Q. A : Closely related species have few characteristics in common, B : Interbreeding among individuals of different populations of a species maintains a free flow of genes
in these populations.
a. 'A' Right, 'B' Right
b.'A' Right, 'B' Wrong
c. A' Wrong, 'B' Right
d.'A' Wrong, 'B' Wrong
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