Please help me

Why are there only a few lions or top predators in an ecosystem, but a lot of primary
consumers?

The lions are really vicious and have sharp canine teeth that can pierce the
wildebeest skin.

When the lions eat the wildebeests, they only get 10% of the energy (carbon
stored in the wildebeest), the other 90% is lost as heat, so one lion needs to eat
several wildebeests to support its energy needs.

There are a lot of primary consumers because there is plenty of grass for them to
eat out in the savanna.

Lions eat other animals too, so there can be leftover wildebeests and their
population can grow exponentially.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

Achild is suffering from fever but the doctor cannot immediately pinpoint the alignment on the basis of this one symptom explain why also mention other two such general symptoms