Introduction to Evolution

Q. What are sibling species?

Q.

Archaeopteryx is a missing link between_______

Q.

What are the advantages of evolution?

Q. S.L. Miller created electric discharge in a closed flask and observed amino acids formation by mixing which of the following components at 800°C?

1. H${}_2$, O${}_2$, CH${}_4$, H${}_2$O
2. CH${}_3$, CO${}_2$, H${}_2$, H${}_2$O
3. CH${}_4$, H${}_2$, NH${}_3$, H${}_2$O
4. CH${}_3$, H${}_2$, SO${}_2$, H${}_2$O

Q. DNA is considered as a better genetic material than RNA. Choose the most appropriate reason from the given options.

1. 2'-OH group present at every nucleotide in RNA is a reactive group and makes RNA labile and easily degradable
2. Though DNA is chemically more reactive it is structurally more stable when compared to RNA
3. DNA is known to be catalytic in nature thereby helping cells to carry out various reactions
4. No, RNA is better genetic material than DNA

Q.

Jurassic period of Mesozoic era is characterized by

1. Flowering plants and first dinosaurs appear

2. Gymnosperms were dominant plants and first birds appear

3. Radiation of reptiles and origin of mammal-like reptiles

4. Dinosaurs became extinct and angiosperms appear

Q. The first organisms were

1. Chemoautotrophs
2. Chemoheterotrophs
3. Autotrophs
4. Eukaryotes

Q. Given below are a few statements regarding somatic hybridization.Choose the correct statements.

(i) protoplasts of different cells of the same plant are fused
(ii) protoplasts from cells of different species can be fused
(iii) treatment of cells with cellulase and pectinase is mandatory
(iv) the hybrid protoplast contains characters of only one parental protoplast.

1. (ii) and (iii)
2. (i) and (iv)
3. (i) and (iii)
4. (i) and (ii)

Q.

How do viruses multiply?

Q.

How are species and population related?

Q. What is 'saltation' according to de Vries? [1 Mark]

Q. Coevolution is process where two organisms evolve together to acquire favorable traits.

1. True
2. False

Q.

How are viroids different from viruses?

Q. Which of the following statements are correct with respect to origin of earth?
a. There was no atmosphere on early earth.
b. Water vapour, methane, carbon dioxide and ammonia were released from molten mass which covered the earth.
c. Oxygen gas was released from plants during photosynthesis.

1. Statements ‘a’ and ‘b’ are correct
2. Statements ‘b’ and ‘c’ are correct
3. Statements ‘a’ and ‘c’ are correct
4. All statements are correct

Q. Which of the following types of RNA is present in the highest percentage proportion in a cell?

1. tRNA
2. mRNA
3. rRNA
4. mRNA and tRNA both

Q.

Related species which are reproductively isolated but morphologically similar are called:

1. Sibling

2. Allopatric

3. Morphospecies

4. Sympatric

Q. ATP was discovered by

1. Lipmann
2. Bowmann
3. Lohmann
4. Blackman

Q.

Do Humans Inhale Nitrogen?

Q.

An enzyme is a protein that acts as a catalyst in living organisms.

1. True
2. False

Q. Which of the following is not a function of RNA?

1. It is the genetic material in several bacteria
2. It is the genetic material in some viruses
3. It is a constituent of ribosomes
4. It acts as a catalyst for some biochemical reactions

Q.

What are the five causes of evolution?

Q. Big bang theory was proposed by

1. Kant
2. Lemaitre
3. K. Bahadur
4. Weismann

Q. Which is correct order of era, in chronological order, in the geological time scale for a hypothetical vertebrate evolution

1. Precambrian, palaeozoic, mesozoic , cenozoic
2. Cenozoic, mesozoic, palaeozoic, precambrian
3. Cenozoic, palaeozoic, mesozoic, precambrian
4. Precambrian, palaeozoic, mesozoic, cenozoic

Q. Choose the incorrect statement about evolution.

1. Evolution stresses the relatedness of all life rather than its differences
2. It’s a way of bringing together many diverse aspects of life’s tremendous complexity
3. Evolution leads to complexity of the organisms
4. Evolution is a continuous process

Q. In the embryos of a typical dicot and a grass, true homologous structures are:

1. Hypocotyl and radicle.
2. Coleoptile and scutellum
3. Coleorhiza and coleoptile
4. Cotyledons and scutellum

Q.

Which of the following is formed in Stanley Miller's classic experiment?

1. Nucleic acids

2. Microspheres

3. Amino acids

4. UV-radiations

Q.

Is paramoecium a Holozoic?

Q. Most biologists think that RNA was the first genetic material because:

1. RNA is single-stranded
2. RNA is very stable
3. Of the existence of ribozymes
4. Both b and c

Q.

How Are Mutations Important To The Process Of Evolution?

Q.

Archaeopteryx is a missing link between _______