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Hoochie [10]
2 years ago
11

Why do scientists assume the first photosynthetic organisms were anoxygenic?

Biology
2 answers:
Scrat [10]2 years ago
7 0

Answer:

scientists are always finding new things

Doss [256]2 years ago
5 0
Because photosynthesis produces oxygen, scientists assume the first photosynthetic organisms were not consuming oxygen, but producing it.
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How virus shows both living and nonliving characteristic???​
Damm [24]

Answer:

Please find the explanation below

Explanation:

Virus is an organism that has been a topic of debate in biological sciences. This debate is based on whether virus should be classified as a living thing or not. However, it has been shown that viruses possess characteristics or properties of both living and non-living things.

The living thing characteristics include;

- Ability to reproduce or replicate (in living cells only and not on their own).

The nonliving characteristics include;

- Lack of cells, which is a strong criterion for every living thing in accordance to the universal cell theory.

- Inability to self-replicate i.e. reproduce on their own without a living host.

6 0
3 years ago
What is the term that describes how a plant responds to gravity​
NemiM [27]

<em>The term</em><em> geotropism</em><em> describes how plants respond to gravity. </em>

<em>Mark as brainliest please.</em>

7 0
3 years ago
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Which is most likely to contain organic compounds?
alexandr1967 [171]

Answer:

b. Living things

Explanation:

Every living thing contains organic compounds.

5 0
3 years ago
The thin, semi-permeable membrane that encloses a cell allows nutrients to enter and wastes to be
Akimi4 [234]

Answer:

The cell membrane contains pores to allow nutrients to enter and waste to leave the cell. cell membrane is SELECTIVELY PERMEABLE which means that the cell membrane controls what enters and leaves the cell. cell membrane protects all cells.

Explanation:

sana makatulong! pa mark po brainliest hehe

8 0
2 years ago
What specific changes in rachel’s muscle cells and kidney function are leading to elevated plasma k levels?
tensa zangetsu [6.8K]

Intracellular Potassium Shifts and Impaired Potassium Excretion leads to elevated plasma K levels.

What is Hyperkalemia?

  • Hyperkalemia, a potentially lethal condition, develops when serum potassium levels rise above 5.5 mmol/l.
  • Potassium is the most common intracellular cation and is crucial for many physiological functions, at a concentration of 100-150 mmol/l. The digestive system quickly and usually fully absorbs potassium.

Causes:

  • Increased Potassium intake: In adult patients with normal renal function, increased dietary potassium intake is a very rare cause of hyperkalemia, but it can be a significant factor in people with kidney disease.
  • Intracellular Potassium Shifts: Large amounts of intracellular potassium can be released into the extracellular area as a result of cellular damage. Excessive activity, rhabdomyolysis after a crush injury, or other hemolytic processes can all be to responsible for this. 
  • Impaired Potassium Excretion: The most frequent cause of hyperkalemia is acute or chronic renal disease. Hyperkalemia may also result from tubular dysfunction brought on by aldosterone insufficiency or insensitivity.

Learn more about the Hyperkalemia with the help of the given link:

brainly.com/question/8920601

#SPJ4

5 0
1 year ago
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