Which of the following statements is incorrect?
1. Life processes are consequences of reactions that occur in an organism.
2. Living organisms are made of inorganic and organic compounds.
3. Life comes from pre-existing life.
4. Genes are not responsible for the stability or changeability of species.
Study of fossils is called
4. none of these
The 'devonian period' is considered to be as
1. age of fishes
2. age of amphibians
3. age of reptiles
4. age of mammals.
The random changes in the allele frequency occurring by chance is termed as
1. genetic variability
2. genetic drift
3. gene migration
The first living organisms that appeard on the planet, according to the most accepted
4. none of the above
Which of these are considered most essential in the origin of life?
2. Nucleic acids
Genetic drift operates only in
1. island population
2. smaller population
3. larger population
4. none of these.
The cranial capacity was largest among the
(a) Peking man (b) Java ape man
(b) African man (d) Neanderthal man
The early-stage human embryo distinctly possesses
2. gill slits
3. external ear (pinna)
A baby has been born with a small tail. It is a case exhibiting
1. retrogressive evolution