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MatroZZZ [7]
3 years ago
13

Who recognized that different layers of rock contained unique collection of fossils?

Biology
2 answers:
andreev551 [17]3 years ago
7 0
I think it's Nicklaus Steno
aleksandrvk [35]3 years ago
7 0

John Ray first recognized it. (I got this from wikipedia so you know)

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One of the grand challenges in biology is understanding how the first cells formed on Earth. Since all cells are bound by a cell
coldgirl [10]
<h2>Answer is option "A"</h2>

Explanation:

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  • The ability of the atoms within a group to form hydrogen bonds with the water molecules around them makes them hydrophilic. Oxygen and nitrogen atoms readily form hydrogen bonds with water molecules, so any organic molecules that have oxygen or nitrogen atoms bound to their carbon skeletons will be hydrophilic.
  • For example, if we take the molecule for cholesterol, we see the OH group on the left is hydrophilic and will form hydrogen bonds with water, while the ring structures, which only consist of hydrogen and carbon atoms, are hydrophobic and will not associate with the water.
  • There are many different kinds of lipids with different functions. Lets start by examining phospholipids, which compose the cell membranes of animals. They form lipid bilayers, with one set of hydrophilic heads facing the exterior of the cell membrane and the other set facing the interior (as you can see on the diagram on screen). The hydrophobic portions of the lipid bilayer - the lipid tails - face towards one another, which allows them to hide away from the water inside and outside of the cell.
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5 0
3 years ago
WILL GIVE BRAINLIEST, 50 POINTS!!!
statuscvo [17]

Answer:

B

Explanation:

The Earth is tilted 23.5 degrees on its vertical axis. During the northern hemisphere's spring and summer, the northern hemisphere is tilted towards the Sun.

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