Suppose a population is carrying a condition controlled by two alleles: r (dominant) and r (recessive). only homozygous individuals that have two copies of the recessive allele have the condition. if the r allele is found in 15 percent of the population, what's the frequency of the rr genotype? a. 72.25 percent b. 12.75 percent c. 25.5 percent d. 2.25 percent

Match the type of adaptation to the correct example, structural adaptation functional adaptation behavioral adaptation example type of adaptation elephants live in herds to protect their young leaves of a rain forest plant species have a pointed tip that enables rainwater to drain off easily. camels have nostrils that they can close snakes produce venom to kill prey and defend themselves. earthworms coil when touched, as part of a defense mechanism. human skin darkens with increased exposure to sunlight.

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

What was the land like over 500 million years ago? what was under the sea?