Different species of plants and animals living in the same habitat is called ___________?

A. Population
B. Community
C. Biome
D. Habitat

The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called__________?

A. An organ
B. A molecule
C. Tissue
D. Both a and c

Percentage of water in brain cells is_______?

A. 20%
B. 65%
C. 85%
D. 89%

The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by________?

A. Molecular biologists
B. Microbiologists
C. Freshwater biologists
D. Social biologist

A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called__________?

A. Substrate
B. Co-factor
C. Inhibitor
D. Promotor

The study of fossils is called__________?

A. Environmental Biology
B. Historical biology
C. Palaeontology
D. Social biology

Which character differentiates living things from non-living organisms___________?

A. They live in the same ecosystem.
B. They are acted upon by the same environment
C. They are highly organized and complex made of one or more cells and contain genetic material
D. Both a and b

Ribosomes were discovered by_______?

A. Golgi
B. De Duve
C. Palade
D. R.Brown