Write in what context did Darwin use the terms ‘fitness’, ‘survival’ and ‘selection’ while elaborating on the mechanism of evolution.

(b) Darwin is the correct option.

(d) birds have evolved from reptiles

Creation and variation occur in a sexually reproducing population as a result of crossing over during meiosis and random fusion of gametes. It is however the organisms that are selected over a...

Creation and variation occur in a sexually reproducing population as a result of crossing over during meiosis and random fusion of gametes. It is however the organisms that are selected...

Pests have (built in) variations in terms of their ability to survive in a given environment, a change in the environment, in the form of an antibiotic would bring out...

dark winged moth where as it reversed in the post industrialised period  In Pre industrialised period the tree trunks were covered with white coloured thick growth of lichens hence the...

Evolution: Gradual accumulation of variations and its selection by nature leading to formation of new species. Variations may arise in a population due to mutations or sexual reproduction. Sub-populations are...

The mechanism of evolution is Saltation

(a) In organic evolution, Lamarck believed that any particular part of the body that is put into more frequent use, has tendency to develop stronger and better while that part...

(c) The sixth lines of the passage states, "one or few individuals may be usually resistant...". Hence, option (c) is correct.