subject
Biology, 10.12.2019 23:31 abelinoperez652

Which best explains how photosynthesis is to humans?

it reduces the amount of harmful rays released by the sun.
it increases the levels of carbon dioxide in the air.
it provides oxygen for humans to breathe.
it produces proteins, which humans can eat.

ansver
Answers: 1

Other questions on the subject: Biology

image
Biology, 22.06.2019 00:30, loveagirl111puppy
On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.
Answers: 3
image
Biology, 22.06.2019 06:30, mmaglaya1
What is the problem in this article? what solution does the article propose?
Answers: 3
image
Biology, 22.06.2019 07:00, kimberlyvazquez1121
About how much of the cell mass is watet
Answers: 1
image
Biology, 22.06.2019 15:30, goodluck99
Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food
Answers: 1
You know the right answer?
Which best explains how photosynthesis is to humans?

it reduces the amount of harmful r...

Questions in other subjects: