Answer:
Mechanical Isolation
A snail with a flat disc-like shell
will not be able to mate with a
snail having a conical shell.
The reproductive organs of
male bush babies do not
match with the reproductive
organs of females of other
bush baby species
Behavioral Isolation
The mating call of a cricket is not
recognized by a cricket of other
species.
The signals sent by a male firefly
are not recognized by the female
firefly of other species.
Explanation:
Mechanical isolation occurs in the scenario where two organisms are willing to mate but cannot do so due to the physical challenges. As in the case of snail a flat disk and a conical disk snail are willing to mate but physical barriers restrict them in doing so.
The same case is with the male and female bush babies where the difference in reproductive organs does not allow them to mate.
Behavioral isolation represents a scenario where two organisms are unaware of mating rituals, season, pattern or signals of each other and hence cannot mate.
For example – male and female cricket do not recognize the mating call of each other. Likewise male and female firefly is also not able to understand each other’s mating signal.
I think it’s the letter A
Answer:
The answer is - (B) the amount of food that is typically consumed.
Explanation -
The symptoms of anorexia nervosa and bulimia nervosa overlap at a large extent. Both are eating disorders in which the individual, affected by any of those, tries to lose weight in unhealthy manner. But there are some key differences between both the disorders.
People suffering with anorexia tend to reduce their food intake to lose weight. It includes extreme dieting and in some cases people stop eating or eat minimal.
People with bulimia continue to eat. Unlike people with anorexia they binge, or overeat large amount of foods. The repetitive cycles of binge-eating lead to self-induced vomiting or starvation which further leads to weight loss.
Whereas excessive exercise is common in both the disorders.
