Question

GIVING MEDALS AND FAN


About 75% of living matter is made up of which two essential chemicals?

copper and carbon
nitrogen and oxygen
silicon and oxygen
hydrogen and oxygen

Answer 1

what do you think do you have a guese

Answer 2

No :/ please help its for study island i dont mean to be rude or rush its just timed v.v

Answer 3

oh are you in k12 I am the only reson I know is because SI

Answer 4

yes c;

Answer 5

The vast majority of the mass of living creatures is composed of only a few elements:

H hydrogen (in pretty much every molecule in living creatures)
O oxygen (in pretty much every molecule in living creatures)
C carbon (in all "organic molecules" -- pretty much every molecule in living creatures, except water)
N nitrogen (in all amino acids and DNA)
P phosphorus (in the phospholipids that compose cell membranes, and in DNA and a few other molecules -- but not in any protein)
S sulphur (in 2 of the 22 amino acid)
Na sodium
Mg magnesium
K potassium
Ca calcium
Cl clorine


Generally most living creatures have 40% to 75% of their mass composed of water (H2O).
All DNA is composed entirely of 5 elements: CHONP.
All possible proteins can be composed from 6 elements: CHONS and Se. However, most proteins can be composed from only 4 elements: CHON.

There are also a number of "trace elements" that, in small amounts (vitamins and dietary minerals), are essential for humans and other creatures:

Se selenium (in 1 of the 22 amino acids, used in at least 20 human proteins)
Mo molybdenum
Cr
Mn
Fe iron, necessary for hemoglobin to work properly
Co
Ni
Cu
Zn
I


There are many other elements typically found in very small amounts in all living creatures. It is extremely difficult to construct an environment that excludes those elements sufficiently to conduct an experiment to see if creatures can live just fine without them, or if creatures need them as essential trace nutrients.

Answer 6

does this help you

Answer 7

:| i dont have time ot read it all lmfao ugh

Answer 8

sorry I can only help not give answers

Answer 9

please :[

Answer 10

i'll try to make it sorter

Answer 11

The four elements that make up most of living matter are hydrogen, oxygen, carbon and nitrogen.

Answer 12

goes that help

Answer 13

@Puertorican_colombian are you there

Answer 14

@Puertorican_colombian are you there

Answer 15

The four elements that make up most of living matter are hydrogen, oxygen, carbon and nitrogen.