Letter D would be likely it
C. Single events or several causes working together to produce extinction in a short period is referred to as mass extinction.
<span>Example:
</span><span>Destruction of forests, mountains, and bodies of water to satisfy human needs result to the imbalance of nature which also give rise to global warming.
</span><span>Animals and plants have lost their habitats. They lost their means to live. They lost their food sources and they suffer and die because of humans irresponsible acts.</span>
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.
Answer: Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Explanation:
Using a microscope
Explanation:
A microscope is a scientific device used for magnifying and studying very tiny features.
It was invented by Anton Von Leeuwenhoek in the 17th century.
- A unicellular organism is an organism made up of a single cell.
- A multi-cellular organism is made up of several cells.
- A cell is a very small microscopic structure.
- It is usually described as the fundamental unit of life.
- Due to its small size, the naked eyes cannot see it
- The invention of the microscope opened up the world of cells.
- Since they have been around for a long time, distinction of cells would have been made possible at those times using a microscope.
learn more:
Microscope brainly.com/question/4065308
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