Introduction to Evolution

Q. The first organisms were

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

Q. The gradual change that develops a species into a better, different, complex and adaptive form is called .

1. adaptation
2. differentiation
3. evolution
4. origin of species

Q.

Development of organism through time is:

1. Development of DNA from nucleotides

2. Development of organism through time

3. Development of a cell from chemicals

4. Cloning

Q. Which one of the following is present today but was absent about 4.6 billion years ago?

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

Q. The organism which helped in increasing the oxygen content of primitive earth's atmosphere was

1. Yeast
2. Mushrooms
3. Marine plants
4. Cyanobacteria

Q. On primitive earth, proteins were formed by the aggregation of

1. Amino acids
2. Nucleic acids
3. Fatty acids
4. None of these

Q. The primordial atmosphere of the primitive earth contained the following substances :

1. $H_{2}andC{H}_4$
   
2. Water vapour
3. $N{H}_3$
4. $C{H}_4$