The answer is B, space in a rock
Given what we know, we can confirm that the "balance of nature" refers to a scientific theory about ecological homeostasis.
<h3>What does ecological homeostasis mean?</h3>
- This refers to the idea of a perfect balance in an ecosystem.
- It is the theory that all aspects of an ecosystem are and will remain balanced even if there are small changes.
- This implies that any minor change in an ecosystem will be corrected.
- This will happen through natural regulation mechanisms such as positive or negative feedback.
Therefore, we can confirm that the "balance of nature" is the scientific theory that all things in an ecosystem will remain balanced, meaning that if there is a small change, it will be corrected through some form of natural regulatory mechanism.
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Answer:A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
Explanation:
Once they have penetrated the first line of defense, NK cells are the principal defenders against only tumor cells or virally infected cells.
<h3>What are NK cells?</h3>
A particular class of immune cell that contains granules, or tiny particles, that contain enzymes that can destroy cancer cells or virus-infected cells. White blood cells, or NK cells, are one type of them. known as NK-LGL and natural killer cell, respectively.
Natural killer (NK) cells are effector lymphocytes of the innate immune system that regulate various tumour types and bacterial infections by preventing their growth and subsequent tissue damage.
Human NK cells are created from hematopoietic stem cells (HSCs), and as they transition from being CD56high to CD56low, KIRs, CD57, and NKG2C are expressed on terminally differentiated NK cells. During this time, NKG2A is gradually lost.
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