In tomatoes, red fruit color is dominant, R, to yellow fruit color, r. A farmer has tomatoes that produce either red or yellow tomatoes. He has signed a contract with a large seed company to provide pure, RR, and pure yellow seeds, rr. They do not want any hybrids. How could the farmer tell if his tomatoes are pure or hybrid?

He should perform a "testcross" by crossing the tomatoes in question with yellow-fruited plants.

If they are pure, all offpsring will be Red:  RR x rr = all Rr

If they are hybrids (heterozygous), half the offspring will have yellow fruits:  Rr x rr = 1:1 (red to yellow)

Explanation:

True

Explanation:

The carrying capacity can be defined as the average population density of the population or size of the population of species that an ecosystem can retain and sustain. The number tend to increase but decreases because of the shortage of resources. This retains the balance in the population of species in an ecosystem. The population if exceed beyond the carrying capacity of an ecosystem, that occurs in the case of exponential growth the population reduces in number to an extent to extinction due to shortage of resources.