If the half-life of an unstable element is 5,000 years, what percentage of the parent material will
be left after 10,000 years?

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.

Number and variety of living organism; includes genetic, species, and ecological types

Which could be a pathway of food through an ecosystem