Which of the following is an internal stimulus?

A) gravity

B) hunger

C) tropism

D) reflex

Which statement about mycorrhizae is false? Group of answer choices Foresters inoculate pine seedlings with them to promote growth. They are important in natural systems and agriculture. Almost all vascular plants have them.

Future directions and careers in ethnobiology

4. Coevolution is when two species that have close ecological interactions evolve jointly over time.

If rainbow trout were transferred from warm water to near freezing water (2°c), what changes in the trout would occur in the trout's nervous system in the colder water?

What is the size of the buccinator muscle on average?

Suppose you use a microscope to look at a cell from the leaf of a tree. What structure will you see that would not be found in a cell from your fingernail? A. mitochondria B. cilia C. cell wall D. ribosomes

Name the three energy roles that organisms fill in an ecosystem.

Adrenergic postganglionic neurons release the hormones norepinephrine and epinephrine. Adrenergic postganglionic neurons release the hormones norepinephrine and epinephrine. True False

Which of the following are examples of the first specialized tissues?

Which structure of the trachea prevents it from collapsing inward and obstructing the air passageway?