18 Fleas live in the hairs of people and animals and feed from their hosts by biting them. In doing
so, fleas can transmit diseases to the hosts, such as plague, typhus, and spotted fever. Which
BEST classifies the relationship between fleas and their hosts?

A mutualism

B commensalism

C predator/prey

D parasite

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

Substance 33°f 100°f peanut oil solid liquid margarine solid liquid chocolate chips solid liquid which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.