The tiny hollow air sacs where oxygen exchange occurs are

A. lymph nodes.

B. capillaries.

C. alveoli.

D. bronchioles.

Rhyolite is associated with what type of eruption?

What structure acts as a gateway for sensory impulses before they reach the cerebral cortex?

What are the two basic ways of generating electricity with hydropower?

From the following list, correctly identify the reason (s) that might explain a decrease in Vmax due to a suboptimal pH during an enzyme assay. a. Protonation of the substrate b. Deprotonation of the amino acids in the enzyme's active site c.

Strawberries can reproduce by means of runners, which are stems that grow horizontally along the ground. At the region of the runner that touches the ground, a new plant develops. Why is the new plant genetically identical to the parent?

How does respiratory system relate to respiration making ATP?

What is the largest group of reptiles that ever lived?

What best describes somatic mutations

Ben is an entomologist studying ant behavior. He wants to know whether ants are pollinators for a specific plant. In which stage of the plant's life cycle should he check whether a significant number of adult ants are acting as pollinators? A.

Why do living things use enzymes instead of heat as a source of activation energy? A: Adding heat does not affect how chemical reactions take place. B: Adding sufficient heat would harm or kill a living thing.