Evolution

Q.

What Is The Phylogenetic Classification Based On?

Q.

What is embryology? How does embryology provide evidence for evolution?

Q. Mention any four tools used for tracing evolutionary relationships to study human evolution

Q.

The phylogenetic system of classification is based on:

1. Evolutionary relationships

2. Floral characters

3. Chemical constituents

4. Morphological features

Q.

What are the four evolutionary forces that would disrupt the population?

Q.

How do embryological studies provide evidence for evolution?

Q.

Give reasons of the following:

(ii) Forelimbs of a frog and a bird are called homologous organs.

Q.

___ is the unit of evolution.

Q. Change in gene frequency which occurs by chance in a small population is called___________.

1. Gene migration
2. Genetic drift
3. Natural selection
4. Gene recombination

Q. ___ is/are the smallest unit of evolution.

1. Population
2. Fossils
3. Vestigial organs
4. Apes

Q.

The study of plants and animals are called what?

Q.

What is meant by the term evolution?

Q.

Which of the following gas was not present in the early earth atmosphere?
(a) Ammonia
(b) Oxygen
(c) Hydrogen sulphide
(d) Methane

Q.

Which of the following is not an example of the vestigial organ in humans?

1. The phalanges of horse
2. Human body hair
3. Vermiform appendix
4. Movement of pinna

Q. Birds arms and bat arms are homologous or analogous?

Q.

What is the most important force of evolution?

Q.

Anthropogenic extinction means the extinction of species from the surface of the earth that is due to

1. Change in season.

2. Effects of meteors.

3. Human activities.

4. None of the above.

Q.

Give an example of characteristics being used to determine how close two species are in evolutionary terms.

Q. Atmosphere of earth just before the origin of life consisted of:

1. ${\mathrm{CH}}_4$, ${\mathrm{NH}}_3$ , $H_2$ and water vapours.
2. ${\mathrm{CH}}_4$, $O_3$, $O_2$ and water vapours.
3. Water vapours, ${\mathrm{CH}}_4$, ${\mathrm{NH}}_3$ and oxygen.
4. ${\mathrm{CO}}_2$, ${\mathrm{NH}}_3$, and ${\mathrm{CH}}_2$.

Q. Statement 1: Diversity in living organisms arises due to evolution

Statement 2: Human beings are not the ultimate species in the course of evolution.

1. Only statement 1 is correct.
2. Only statement 2 is correct.
3. Both the statements are correct.
4. Both the statements are incorrect.

Q. ___ era was the golden age of Dinosaurs/age of reptiles.

1. Triassic
2. Mesozoic
3. Cenozoic
4. Paleozoic

Q.

According to the evolutionary theory, the formation of a new species is generally due to

1. sudden creation by nature

2. accumulation of variations over several generations

3. clones formed during asexual reproduction

4. movement of individuals from one habitat to another

Q. Which of the following are evidences of evolution?

1. Fossils
2. Homologous organs
3. Analogous organs
4. All of these

Q.

What is evolution? What are the factors leading to evolution and how do these factors lead to evolution?

Q. What do you understand by term variation?

Q.

Saurology is the study of what?

Q. How many body segments does the leech have?

1. 20
2. 30
3. 15
4. 33

Q.

The atmosphere of the primitive earth was reducing.

1. True
2. False

Q. Explain with an example for each, how the following provides evidences in favour of evolution in organisms :
(a) Homologous organs
(b) Analogous organs
(c) Fossils

Q.

Why are mass extinctions Important?