Which of the following is not a freshwater ecosystem?

a.

lakes

b.

rivers

c.

seas

d.

springs

How is blood flow related to lung function during exercise?

How do ocean ridges and deep sea trenches support the theory of seafloor spreading?

In which of the following are lipids found? in saturated and unsaturated fats, in some vitamins and steroids, in biological membranes, or all of these

A type of volcano with broad gentle slopes and built by the eruption of fluid basalt lava

Which of the following are the starting substances in photosynthesis?

Name the cells that are produced by the testes and ovaries

What description best explains why viruses can become more pathogenic to hosts that were not affected by the virus before?

The chief force pushing water and solutes out of the blood across the filtration membrane is A) the ionic electrochemical gradient B) protein-regulated diffusion C) glomerular hydrostatic pressure D) the size of the pores in the basement membrane of

From day 23 to 28 the progesterone levels are dropping. What effect will this eventually have on the endometrium?

When both muscles of this pair are contracted simultaneously, they flex the neck forward. When both muscles of this pair are contracted simultaneously, they flex the neck forward. a. platysma b. semispinalis c. sternocleidomastoid d. trapezius