Why is a shell considered to be biotic

What characteristic make legumes a good food source for food insecure populations

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

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.