The earliest organisms were completely heterotrophic in nature. why?

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

Which of the following situations describes a adaptation for a mole? question 2 options: a mole is blind and cannot see underground. a mole is bright and attracts the attention of predator birds. a mole has a sensitive sense of smell to it find food underground.

Use the distance formula to determine weather each pair of segments have the same length