Natural selection can alter the frequency of distribution allele and heritable trait in different following way

A- Accumulation of those mutation that increase fitness of population in changing environment

B- Check accumulation of mutation that lower the fitness of species in unchanging environment

c- occur when population is subjected to divergent selection

#Question id: 12320

#Section 1: Ecology

#Question id: 3438

#Section 2: Evolution

The type of learning that causes specially trained dogs to salivate when they hear bells is called

#Question id: 3420

#Section 2: Evolution

Following are key points about the effect of genetic drift:

A. Genetic drift is significant in small populations.

B. Genetic drift can cause allele frequencies to change in a pre-directed way.

C. Genetic drift can lead to a loss of genetic variation within populations.

D. Genetic drift can cause harmful alleles to become fixed.

Which one of the following combination of the above statements are true?

#Question id: 11255

#Section 4: Behavioural Ecology

Antiherbivore defenses in Umbelliferous plants and the insects feeding on these plants has shown that:

#Question id: 10749

#Section 1: Ecology

Which of the following observation of above experiment set is correct?

A) First set of experiment, N1 and N2 species are coexist

B) Second set of experiment, N1 and N2 species are coexist

C) Second set of experiment, N1 will be win

D) First set of experiment, population growth of each species is limited more by intraspecific competition than by interspecific competition