Occasionally, some lethal allele (like sickle cell) is unusually common (more than 50% heterozygotes). what does this tell us?

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b. organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Ascientist observes certain changes in the physical features of a particular species over time. she concludes that the species has undergone evolutionary change. she wants to study the animals by analyzing their population. she’ll use . the population of this species is decreasing considerably. if this trend doesn’t change, this species will fall under the category of animals. this is a plato question, i need to make up his biology credit.

When can exponential growth happen? a: when there are limited resources b: when carrying capacity is reachedc: when there is no competition d: when the death rate is high