Skin does all of the following except:

A. absorb water.

B. protect from the sun's rays.

C. stop bacteria from entering the body.

D. keep dirt out.

Why do certain bacteria become endospores?

The human body contains roughly 100 trillion cells. approximately what percentage of those cells are independent microorganisms?

In embryo development stage 2, what type of replication are the first cells undergoing? what do you think would happen if a mutation occurred in one of these cells?

A student drew the following flowchart. Blasting > Collecting > Hauling > Crushing, which process is shown a. Crude oil refining b. Hydraulic fracturing c. Coal burning d. Surface mining

Which of the following is the responsibility of a boat operator?

Under what circumstances does membrane transport always require energy?

What is one disadvantage of using plasma gasification to detoxify hazardous waste?

Euglena use which structure for movement? A. cilia B. flagella C. pseudopods D. they do not move

1. What is a reproductive process in which a cell's genetic information is duplicated and then divided to produce a single identical daughter cell from an outgrowth of a larger parent cell? A. production of spores B. budding C. binary fission D.

True or false? biologists studied the effects of forest fragmentation by calculating the difference between the amount of plant biomass in the edges of forest fragments and the interiors of unfragmented forest.