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Vlada [557]
2 years ago
14

Which best describes the cell theory? Scientists know all there is to know about cells, so the cell theory will not .change. As

technological advancements are made, the cell theory may change. A theory, once formulated, cannot be changed. The development of a synthetic cell has caused the cell theory to change.
Biology
2 answers:
Tresset [83]2 years ago
8 0

Answer:

the cell is the basic structural and functional unit of life

Explanation:

galina1969 [7]2 years ago
5 0

Answer:

(B) As technological advancements are made, the cell theory may change.

Explanation:

B is the correct answer primarily because the rest are false. Scientists always have more to learn and have more to add to the cell theory and we can't make the definite claim that we know it all. A theory can always be changed and adjusted as more information is learned and considered. And I don't really know about the last one, but it doesn't quite sound right. I can say that B is a true statement, which is why I would confidently mark it as correct.

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Li-Fraumeni syndrome (LFS1) is a rare hereditary disorder that leads to a predisposition to cancer. This hereditary disorder is
Nimfa-mama [501]

Answer:

CHK2, p53, p21, cell cycle progression.

Explanation:

In a normal cell with no LFS mutation, during the G1 stage of cell cycle progression, the CHK2 activates if there is damage in the DNA. CHK2 activates p53, which is a tumor suppressor protein that will hold the cell cycle in G1/S until the DNA is repaired. The p53 protein activates p21, a protein that binds to CDK2 and stops the cell cycle. The cell cycle will continue once the damage is repaired.      

3 0
3 years ago
Question 4
Juliette [100K]

Answer:

In eukaryotes, thousands of chemical reactions are able to take place in  separate compartments called organelles.

Explanation:

Organelles are specific cellular structures that are the means of compartmentalizing the various functions that occur within cells.

Examples of organelles and their functions are:

- <u>Nucleus</u>: contains DNA and in it occur the replication of this molecule and its transcription into RNA.

- <u>Rough endoplasmic reticulum</u>: protein synthesis and conjugation of these molecules occurs.

- <u>Mitochondrion</u>: houses all oxidative phosphorylation reactions and the electron transport chain for ATP synthesis to occur.

The organelles are then the structures that allow the development of the multiple functions that a cell has.

The other options are not correct because:

  • <em><u>Bacteria</u></em><em> is a prokaryotic organism. </em>
  • <em><u>Prokaryote</u></em><em> refers to simple organisms that lack organelles. </em>
  • <em><u>Proteins</u></em><em> are biomolecules that allow the structure and function of living beings.</em>
8 0
2 years ago
What types of organisms will be affected by a decreased supply of water in an ecosystem?
RideAnS [48]
B, for sure. Producers, Like grass and Flowers need water to make food. Consumers, like Cats, Snakes and Boars need water to drink so our internal systems will function properly. 
Im not sure if decomposers need water, but if there is less water then more animals die and they get food. so, not sure about that one.
4 0
2 years ago
Read 2 more answers
Explain what might happen if the chloroplasts in a cell are not working.
marishachu [46]

Answer:

The plant cell will not produce chloroplasts, and the plant will not be green any more.

Explanation:

Hope this helps!!

8 0
2 years ago
Which of the following structures are present in plant cells but absent in animal cells ?
Paladinen [302]

Answer:

Plant cells have a large central vacuole, a cell wall, and chloroplasts while animal cells do not.

Hope this helps!

4 0
2 years ago
Read 2 more answers
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