How is the presently occurring species extinction different from the earlier mass extinctions

Fewer individuals in a species impose extensive inbreeding among them. This limits the appearance of variations and puts the species at a disadvantage if there are changes in the environment....

In case a species (x) becomes extinct, the plant and animal species (M, N, O, Z) associated with an obligatory way also become extinct. For example. (i) When a fish species which...

Species extinction occuring at present is due to anthropogenic causes whereas the earlier extinction was due to natural causes. 

In case a species (x) becomes extinct, the plant and animal species (M, N, O, Z) associated with an obligatory way also become extinct. For example.  (i) When a fish species which...

Fewer individuals in a species impose extensive inbreeding among them. This limits the appearance of variations and puts the species at a disadvantage if there are changes in the environment....

Environmental cue: In some animals, the temperature at which fertilised eggs are kept determines whether the developing animal in egg is male or female. In some animals like snail, individual can...

(i) Absolutely not. We should exhibit humane approach&ehaviour and should not treat them as isolated. (ii) One should be aware about the mode of transmission of disease, danger of sharing needles,...

(a) The current extinction rate are estimated to be 100 to 1000 times faster than in the pre-human times , because of human activities  (b) (i) Decline in plant production (ii) Lowered...

The correct answer is (2) The association of H1 protein indicates the complete formation of nucleosome which requires DNA condensation. The DNA is therefore in condensed form.

b. Over exploitation by humans.