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NNADVOKAT [17]
2 years ago
13

HELP PLEASE Current theory is that all life on earth originated from

Biology
2 answers:
mezya [45]2 years ago
6 0

Answer:

single cell prokaryotes

skelet666 [1.2K]2 years ago
6 0

Answer:

Single-cell prokaryotes

Explanation:

The first cells were most likely very simple prokaryotic forms. Ra- diometric dating indicates that the earth is 4 to 5 billion years old and that prokaryotes may have arisen more than 3.5 billion years ago

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What was the predator of the stickleback in loburg lake?
liubo4ka [24]

The correct answer is - C. Humans.

The stickleback in Loburg Lake, Alaska, is not a native species of the lake. It is thought that this fish was introduced to this lake somewhere between 1984 and 1989. The reason for this kind of suggestion is that the stickleback in this lake had full armor like the stickleback in the seas, which is not something found among the lake populations of this species. Also, the full armor had gradually been reducing with each new generation, and in the present, the stickleback in this lake looks totally the same as the other lake populations.

The stickleback did not had any predators in Loburg Lake, thus the losing of the full armor as it was not needed, instead the stickleback was the predator. But even though it didn't had a predator in the water, the humans became its predator through the recreational fishing that takes place on this lake.

5 0
2 years ago
If the same base pairs are used to code for all organisms why is there so much variation among organisms
laila [671]
The list of answers ? I don’t know of the top of my head with just the question
5 0
3 years ago
Read 2 more answers
The main function of the rough endoplasmic reticulum is the production of Q
9966 [12]

Answer:

4. Membrane and proteins secreted by the cell

Explanation:

Endoplasmic reticulum (ER) is one of the organelle that makes up the endomembrane system of eukaryotes. The ER is of two types viz: rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER).

The RER is called "rough" because of the ribosome organelles that are attached to its surface. The attachment of this ribosomes (site of protein synthesis) also defines its function. The RER is principally involved in the production of protein. Hence, the Rough Endoplasmic Reticulum functions mainly in the production of membrane and proteins secreted by the cell.

6 0
3 years ago
What happens in a convection cell?
BARSIC [14]

Answer:

The correct option is A. Cooler, more dense material sink while warmer, less dense material rises.

Explanation:

Convection can simply be described as the transfer of heat energy among molecules or substances. Convection will occur if molecules of liquid or gas are given rough supply of heat. Hot liquids or gases would have the following properties:

  • Their density would be less.
  • They would have the ability to rise.

Whereas the cooler molecules will have the following properties:

  • Their density would be more than the hot molecules.
  • They would have the ability to sink.
5 0
3 years ago
Which one of the following does not have its outer orbit full?
gizmo_the_mogwai [7]

Answer:

Lithium

Explanation:

It is group I, not group 0.

7 0
3 years ago
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