I believe it is D, the reason being is because they form on their own, not from a living or dead organism. It can't be B because that is true, and the same for C. hope this helps, have an amazing day :)
Answer:carbon,hydrogen, nitrogen, oxygen, phosphorus, sulphur
Explanation:living things are characteristized by hierarchy in their organisation.macromolecules are made up of elements each with it's unique chemical bonds.
Within the cell, macromolecules are found in organelles ,which form the cells.the cells combines into tissues,which combines into organs .organs systems consists of similar functional organs.
living things commonly contains carbon, hydrogen, nitrogen,oxygen, phosphorus and sulphur.
(Mnemonic---CHNOPS)
By the ligand receptors on the surface of the cell membrane. How do transport proteins make it easier for certain molecules to diffuse across a membrane.
the binding of a signaling molecule, or ligand, to its receiving molecule, or receptor.
B. the complex interactions
and feeding relationships
between organisms within
an ecosystem
<span>1 – ten thousands = equals to 10 000
2 – thousands = equals to 2 000
3 – hundreds = equals to 300
5 – tens = equals to 50
4 – ones = equals to 4
.8 – tenths = equals to 8/10
.09 – hundreds = equals to 9/100
.007 – thousands = equals to 7/1 000
Which is </span><span>12,354.897</span>
