Plants respond to changes in their environment. The growth of a plant in response to a stimulus is called a(n):

A: Hormone

B:Stimulus

C:Auxin

D:Tropism

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

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.