Which of the following is not true about Homo sapiens?

(1) Arose in 75000- 10000 years ago

(2) Cave art developed about 18000 years ago

(3) Agriculture came around 10000 years ago

(4) Modern man's skull resembles more with adult chimpanzee than baby chimpanzee.

Some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats on other continents. This is an example of:

A population of an animal is hunted down to only 20 organisms. Later the number is restored to 10,000 organisms, but the variations in this population are highly reduced. This is called:

1. Founder Effect

2. Bottleneck effect

3. Edge effect

4. Heterosis

What is the half life of U²³⁸, the radioactive isotope of uranium?

The earliest known members of the horse family belong to the genus:

1. Hyracotherium                                                             

2. Equus

3. Mesohippus                                                                  

4. Merychippus

In a population of red (dominant) and white flowers, the frequency of red flowers is 91 %. What is the frequency of the red allele?

 ............... operates to eliminate intermediate phenotypes.

Many bacteria are now resistant to penicillin, because:

A change in allele frequency within a population, over a succession of generations, is called:

A plant population that reproduces by self - pollination is an extreme example of :