#Question id: 3355
#Section 2: Evolution
Speciation in ancestor as following way
A- Non-swimming populations separated by a river may gradually diverge because there is no gene flow between them
B- Plants commonly exhibit polyploidy, meaning they contain three or more sets of chromosomes
C- The tendency for two species to diverge in morphology and thus resource use because of competition
Which of the following above condition allowed to which type of speciation?
#Question id: 11770
#Section 1: Ecology
Natural selection in an animal population results in narrowing of the range of phenotypic variation but no change in the average phenotype. What kind of selection is this population experiencing?
#Question id: 12446
#Section 1: Ecology
#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: 10843
#Section 2: Evolution
For a Batesian mimicry system to work,