Answer:
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7. A totipotent stem cell is a cell capable of differentiating into any cell required by the body.
A pluripotent stem cell can differentiate into any body cell but it is not required for the growth and development of the embryo.
Multipotent stem cells can differentiate into any cell in a specific cell lineage. For example, a red blood cell or white blood cell.
An oligopotent stem cell can differentiate into one of a specific cell type.
A unipotent cell is fully differentiated and specialized and can only produce more of its own cell type.
5. True. Tissues are a group of cells with the same structure and function.
Explanation:
Stem Cells:
A stem cell is an undifferentiated cell that has the capacity to differentiate into any cell of the body under specific conditions.
- Totipotent stem cells are the first embryonic cells produced by the division of the zygote. They can differentiate into any cell required for development.
- The embryonic cells formed through the division of the zygote are pluripotent cells.
Answer:
There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Static friction is strongest, followed by sliding friction, and then rolling friction, which is weakest. Fluid friction occurs in fluids, which are liquids or gases.
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Answer:
C. The particles that make up the aluminium bar are moving faster.
Explanation:
You can notice how you rub your hands outside during winter, right? It gets warmer the more you rub your hands, so it is basically like that, but with the particles of the aluminium bar.
<span>The factors which are common to both gradualism and punctuated equilibrium are found in the first option - migration, genetic drift, speciation, and natural selection. Both gradualism and punctuated equlibrium go through these 4 phases. Gradualism, as opposed to punctualism, is a theory that proposes that evolution is a process created through gradual changes, as opposed to immediate ones.</span>
