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In the adaptive immune response, do Helper T cells activate B cells and cytotoxic T lymphocytes to kill infected host cells? Do Helper T cells phagocytize bacteria and viruses?
T helper is the cell which is activated by the macrophage. It has unique receptor called APC(antigen presenting cell). When the foreign antigen being eaten by the macrophage, some parts...
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Were the first life-forms on earth prokaryotic cells or eukaryotic cells?
Some experts think that prokaryotic cells developed from eukaryotic ones by a process of simplification, but the earliest evidence of life on earth that we have is of prokaryotic cells,...
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How does the nucleus differ in prokaryotic cells and eukaryotic cells?
The most important difference is that in prokaryotes the nucleus is naked ie not bound by a nuclear membrane whereas in eukaryotes the nucleus is bound by a double layered...
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Which kind of cell can divide by mitosis, a germ cell or a somatic cell? What kind can undergo meiosis?
Mitosis is for growth and repair. One cell becomes two daughter cells with each containing 46 chromosomes and retains the exact feature of that cell. Meiosis is for reproductive cells....
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Which of these correctly distinguishes mitosis from meiosis?
A) Mitosis occurs in germ cells and meiosis occurs in somatic cells.
B) Crossing over takes place in mitosis and not in meiotic cell division.
C) Meiosis produces four 2N daughter cells; mitos
Recall that somatic cells are body cells excluding the reproductive cells. For example, this includes cells of the liver, skin, stomach, but not of sperm or the human egg. In...
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Do cancer cells undergo mitosis at an abnormally fast rate?
is closely controlled by the genes inside every cell. Sometimes this control can go wrong. If that happens in just a single cell, it can replicate itself to make...
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Why do cells undergo mitosis and meiosis?
Mitosis is used to grow new tissues an repair the wounded ones. Meiosis is used to produce gametes which eventually fuse together to make zygote that will develop into a...
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What is the difference between daughter cells produced by meiosis and daughter cells produced by mitosis?
The main differences between mitosis and meiosis occur in meiosis stage I. For the most part, in mitosis, diploid cells are partitioned into two new diploid cells, while in meiosis,...
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How did prokaryotic cells turn into eukaryotic cells?
The prokaryotic cells are the cells without nucleus and cell organelles. If, the prokaryotes change to eukaryotes, the nucleus and the cell organelles are formed.
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How can a haploid cell undergo mitosis?
is the type of cell division that ensures equal distribution of genetic material in daughter cells. Mitosis can occur both in diploid and haploid cells. the main function of...
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