Theories of Origin of Life

Q.

What is the meaning of survival of the fittest?

Q.

Explain the different layers of the atmosphere.

Q.

Assertion: Primary atmosphere of primitive earth was reducing.

Reason: Primary atmosphere had an abundance of NH₃, CH₄, and CO₂ but had no free oxygen.

Read the assertion and reason statements carefully and answer the question on the basis of the following options.

1. Assertion is True, Reason is True; Reason is a correct explanation for Assertion.

2. Assertion is True, Reason is True; Reason is not a correct explanation for Assertion.

3. Assertion is True, Reason is False.

4. Assertion is False, Reason is True.

Q.

What is called classical physics?

Q.

It is said that elemental composition of living organisms and that of inanimate objects (like earth's crust) are similar in the sense that all the major elements are present in both. Then that would be the difference between these two group ? Choose a correct answer from among the following.

(a) Living organisms have more gold in them than inanimate objects

(b) Living organisms have more water in their body than inanimate objects

(c) Living organisms have more carbon, oxygen and hydrogen per unit mass than inanimate objects

(d) Living organisms have more calcium in them than inanimate objects

Q. According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?

1. Methane
2. Water vapour
3. Oxygen
4. Hydrogen

Q. The branch of science that deals with the study of cell structure is known as

1. Histology
2. Morphology
3. Ecology
4. Cytology

Q.

Which is the largest primate in the world?

Q.

Why low temperature is necessary for spermatogenesis?

Q.

The greenhouse gas/es is (are):

1. Carbon dioxide

2. Oxygen

3. Water vapor

4. Methane

1. (1) and (2) only

2. (1), (3), and (4) only

3. (1) and (3) only

4. (1) only

Q. In plant nutrition, elements are classified as major or minor depending on.

1. Their relative production in the ash obtained after burning the plants.
2. Their relative importance in plant growth
3. Their availability in the soil.
4. The relative amounts required by the plants.

Q.

What is the hypothesis of oxygen revolution?

Q. Assertion : Smaller the organism, higher is the rate of metabolism per gram weight.

Reason : The heart rate of six months old baby is much higher than that of an old person.

1. If both assertion and reason are true and reason is correct explanation of assertion.
2. If both assertion and reason are true but reason is not the correct explanation of assertion.
3. If assertion is true but reason is false.
4. If both assertion and reason and false.

Q. Differentiate between divergent and convergent evolution. Give one example of each. [3]

Q.

Assertion: Lamarck's theory of organic evolution states that use and disuse of organs and changes in environment cause inheritable variations.

Reason: The principle of inheritance of acquired characters.

1. Both assertion and reason are true and reason is the correct explanation of assertion

2. Both assertion and reason are true but reason is not the correct explanation of assertion

3. Assertion is true but reason is false.

4. Both assertion and reason are false

Q. Assertion : Coacervates are believed to be the precursors of life.

Reason : Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules.

1. If both assertion and reason are true and reason is correct explanation of assertion.
2. If both assertion and reason are true but reason is not the correct explanation of assertion.
3. If assertion is true but reason is false.
4. If both assertion and reason and false.

Q.

Why did the earth have a reducing atmosphere earlier?

Q.

How does the extension of the neck in Giraffe support Lamarcks theory of evolution?

Q. Mention the features of Aristotle classification?

Q.

Tendrils in plants are an example of

1. convergent evolution

2. radiation

3. divergent evolution

4. co-evolution

Q. Which one of the following scientist's name is correctly matched with the theory put forth by him?

1. Mendel - Theory of pangenesis
2. Weismann - Theory of continuity of germplasm
3. Pasteur - Inheritance of acquired characters
4. de Vries - Natural selection

Q.

There is no life on moon due to absence of:

1. Light

2. Temperature

3. Water

4. Oxygen

Q.

First mammals occurred in which era period?

1. Permian - Palaeozoic

2. None of these

3. Tertiary - Coenozoic

4. Triassic - Mesozoic

Q.

The first organism to be found on a bare rock is algae.

1. True
2. False

Q. There is no life on moon because of the absence of

1. Water
2. Oxygen
3. Nitrogen
4. Hydrogen

Q. Which of the following is commonly called “age of mammals and birds”–

1. Mesozoic
2. Coenozoic
3. Paleozoic
4. Azoic

Q. Organs that have similar embryonic origin but perform different functions are called

1. homologous organs
2. analogous organs
3. vestigial organs
4. atavistic organs

Q.

what is the chemical basis of life?

Q. Assertion: When dried seeds of pea are placed in a tin and water is added up to their upper level and then a lid is put tightly over it. Within an hour, the lid will be blown off.
Reason: Due to rapid cell division in pea seeds.

1. Assertion is true but reason is false
2. Both Assertion and reason are true but reason is not correct explanation of assertion
3. Both Assertion and reason are false
4. Both Assertion and reason are true and the reason is the correct explanation of Assertion

Q.

State True or False: Linux was created by Lewis Fernandis.