Biology

Biology, 02.11.2019 23:31, deepspy599otchpd

If cell division produce more and more identical cells what explain how specialized cells such as blood cells, muscle cell and nerve cell form

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Biology, 27.06.2019 21:50, thestarlexyp32wpj

The lab you work in has discovered a previously unidentified extracellular signal molecule called qgf, a 75,000-dalton protein. you add purified qgf to different types of cells to determine its effect on these cells. when you add qgf to heart muscle cells, you observe an increase in cell contraction. when you add it to fibroblasts, they undergo cell division. when you add it to nerve cells, they die. when you add it to glial cells, you do not see any effect on cell division or survival. given these observations, which of the following statements is most likely to be true? and why? (5points)(a) because it acts on so many diverse cell types, qgf probably diffuses across the plasma membrane into the cytoplasm of these cells.(b) glial cells do not have a receptor for qgf.(c) qgf activates different intracellular signaling pathways in heart muscle cells, fibroblasts, and nerve cells to produce the different responses observed.(d) heart muscle cells, fibroblasts, and nerve cells must all have the same receptor for qgf.

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Biology, 21.07.2019 07:00, stormserena

All cells come from preexisting cells. a cell divides its dna in a process known as and its cytoplasmic contents in a process known as , producing two new daughter cells while all life begins as a single cell, the human body is not just one cell type. cells that can divide without becoming a specific cell type (i.e. skin cells) are known as . when stem cells undergo mitosis and divide, they produce two cells. one cell remains a stem cell and the other is a partially specialized cell known as a cell. cells undergo a process of specialization or determination called to become neurons, muscle cells, or skin cells. stem cells are the source of all different cell types.

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Biology, 21.07.2019 09:00, 310000982

All cells come from preexisting cells. a cell divides its dna in a process known as and its cytoplasmic contents in a process known as , producing two new daughter cells while all life begins as a single cell, the human body is not just one cell type. cells that can divide without becoming a specific cell type (i.e. skin cells) are known as . when stem cells undergo mitosis and divide, they produce two cells. one cell remains a stem cell and the other is a partially specialized cell known as a cell. cells undergo a process of specialization or determination called to become neurons, muscle cells, or skin cells. stem cells are the source of all different cell types.

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Biology, 09.11.2019 01:31, SupremeDiaz17

Which of the following statements is implied by the diagram? a. specialized cells, such as bone cells, skin cells, red blood cells, and muscle cells, cannot be produced from a single cell. b. specialized cells are produced immediately following fertilization, or the fusion of a sperm cell with an egg cell. c. since all of the cells in an individual organism come from a single cell, they must all be identical. d. even though all the cells in an individual organism come from a single cell, they can specialize into different types of cells.

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