Which one of the following in birds indicates their reptilian ancestry?
 

1.	Scales on their heart
2.	Four-chambered heart
3.	Two special chambers crop and grizzlies in their digestive tract
4.	Egg with a calcareous shell

Darwinism explains all the following except:

Theory of pangenesis was given by:

1. Darwin

2. Lamarck

3. Hugo de Vries

4. Oparin

Which of the following is not true for a species?

The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin, provides evidence for:

1. origin of species by natural selection

2. intraspecific variations

3. intraspecific competition

4. interspecific competition

Age of fishes is also known as:

1. Permian Era

2. Silurian Era

3. Devonian Era

4. Ordovician Era

Variations caused by mutation, as proposed by Hugo de Vries, are:
1. small and directionless
2. random and directional
3. random and directionless
4. small and directional

A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?

In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 kg to 5 kg die. Which type of selection process is taking place?
1. Cyclical selection
2. Directional selection
3. Stabilizing selection
4. Disruptive selection