Theory of Evolution

Q. What is Natural selection?

Q. Homologous organs have:

1. Similar origin but different functions
2. Similar origin and same function
3. Different origin but same function
4. Different origin and different functions

Q.

Evolution in nature takes place by the _________.

1. accumulation of all variations in a species

2. changes in the environment

3. accumulation of beneficial variations in species

4. change in food pattern

Q.

Variations are raw materials for evolution because they ………………………

1. accumulate more changes in successive generations

2. adds more genes to the existing genetic material

3. removes defects in the species

4. develop changes in mitochondrial DNA synthesis in the cell

Q. Analogous organs have:

1. Similar origin but different functions
2. Similar origin and same function
3. Different origin but same function
4. Different origin and different functions

Q.

Fossil evidence in evolutionary studies explains that ________.

1. life is old and has changed over time

2. humans existed before plants

3. cells and tissues evolved from primitive organs

4. organic evolution took place before chemical evolution

Q. Charles Darwin is credited with

1. The theory of natural selection
2. Charles laws
3. Galapagos island theory
4. Theory of finches

Q. _______ is based on the idea that more the similarities in the DNA of the organisms, more closely they are related.

1. DNA analysis
2. Fossil analysis
3. Molecular phylogeny
4. Genetics

Q. Differences in characteristics within a species is called ______.

1. evolution
2. adaptation
3. heredity
4. variation

Q. The difference in characters between the organisms of same species is called .

1. variation
2. evolution
3. speciation