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iVinArrow [24]
4 years ago
11

The oldest fossil identifie so far , the stromatolites , represent which type of cell ?

Biology
1 answer:
telo118 [61]4 years ago
7 0

Answer:

The correct answer will be option-B

Explanation:

Stromatolites are the sedimentary deposited mounds made of layers of phototrophic microbes which were usually present in the primordial times. The stromatolites are one of the oldest fossils is known today which were formed in the shallow water.

They are composed of the phototrophic bacteria or cyanobacteria which survived and still survive by using the carbon dioxide and sunlight to make food material.

Since the bacteria are the prokaryotic organism therefore, the Option-B is the correct answer.

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Which type of cell is responsible for causing apoptosis in cancer cells and virus-infected cells?
lbvjy [14]
The answer is natural killer cells.

Natural killer cells are a type of lymphocytes and they are important for the innate immune system. They recognise stressed cells much faster than other immune cells. Their response is rapid and usually only a few days after a viral infection. They also respond to <span>cancer cell </span>formation. While other immune cells can detect only those harmful cells that have specific markers on the surface of the cell membrane, natural killer cells can even detect those cells that miss markers for apoptosis.
6 0
4 years ago
Which organ systems function as control systems, communicating with other cells/organs to regulate their activities?.
mariarad [96]

The Nervous System and Endocrine Systems are the two systems which are responsible for controlling the whole body of an organism.

<h3>Which organ systems function as control systems, communicating with other cells/organs to regulate their activities?</h3>

The nervous system is the system which controls the system, major controlling, regulatory, and communicating system in the body. The nervous system is the center of all mental activity including learning, memory and thought. Together with the endocrine system, the nervous system is responsible for regulating and maintaining the homeostasis which helps to maintain the internal environment.

So we can conclude that the Nervous System and Endocrine Systems are the two systems which are responsible for controlling the whole body of an organism.

Learn more about Cells here: brainly.com/question/1399230

#SPJ1

5 0
2 years ago
Help me please omgggggggggg
Sunny_sXe [5.5K]

Answer:

I believe it may be "B" so hopefully it's right

7 0
3 years ago
Read 2 more answers
How are the nucleus, rough er, and vesicles related?
madam [21]

Answer:

They are all organelles in a cell

Explanation:

Hope this helps!

3 0
3 years ago
Which is a source of adult stem cells?<br> bone marrow<br> amniotic fluid<br> embryos<br> gametes
Lorico [155]

Answer:

Bone marrow is a source of adult stem cell

5 0
3 years ago
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