VSAQ for Heredity and Evolution Class 10 Science NCERT
Important Questions1
What is DNA ?
Answer
DNA is the carrier of hereditary information from parents to the next generation.
VSAQ
2
What is a gene?
Answer
Gene is a part of DNA that encodes the instructions that allow a cell to produce a specific protein or enzyme
VSAQ
3
Where is DNA found in a cell?
Answer
DNA is found in the cell nucleus.
VSAQ
4
What is heredity ?
Answer
The transmission of characteristics from one generation to another is known as heredity.
VSAQ
5
Name the information source for making proteins in the cells.
Answer
Cellular DNA is the information source for making proteins in cells.
VSAQ
6
Give the respective scientific terms used for studying:
(i) the mechanism by which variations are created and inherited and,
(ii) the development of new type of organisms from the existing ones.
Answer
(i) Genetics is the study of mechanism by which variations are created and inherited.
(ii) Evolution is used for studying the development of new type of organisms from the existing ones.
VSAQ
7
No two individuals are absolutely alike in population. Why?
Answer
No two individuals are absolutely alike in a population because variation arises due to DNA Copying.
VSAQ
8
How many pairs of chromosomes are present in human beings?
Answer
23 pairs.
VSAQ
9
A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 progeny?
Answer
Violet flowers.
VSAQ
10
Mendel took tall pea plants and short pea plants and produced F1 progeny through cross fertilisation. What did Mendel observe in the F1 progeny ?
Answer
All pea plant were tall in F, generation.
VSAQ
11
What is speciation?
Answer
Speciation is the evolution of reproductive isolation among once interbreeding populations i.e., the development of one or more species from an existing species.
VSAQ
12
List any two factors that could lead to speciation?
Answer
Two factors that could lead to speciation are –
(i) Genetic drift,
(ii) Reproductive isolation.
VSAQ
13
Write the contribution of Charles Darwin in the field of evolution.
Answer
Charles Darwin Proposed that evolution of species occurred by natural selection.
VSAQ
14
Name three organisms which are fossilized.
Answer
(i) Dinosaur,
(ii) Ammonite,
(iii) Trilobite.
VSAQ