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| 1 | |
What are the three main factors that influence differentiation in animal cells? |
| | A) | the contents of the cytoplasm, environmental conditions, and neighbouring cells |
| | B) | the sets of chromosomes in daughter cells, the contents of the cell’s cytoplasm, and environmental conditions |
| | C) | the sets of chromosomes in daughter cells, the contents of the cell’s cytoplasm, and the influence of neighbouring cells |
| | D) | the sets of chromosomes in daughter cells, environmental conditions, and the influence of neighbouring cells |
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| 2 | |
What statement is true about cell specialization? |
| | A) | Each cell has a cell membrane that prevents the passage of harmful material into the cell. As a result, the contents of neighbouring cells do not affect how one another’s DNA is expressed. |
| | B) | The sets of chromosomes in daughter cells are identical, and the contents of the cytoplasm are the same. As a result, the contents of the cytoplasm do not affect cell specialization. |
| | C) | Cells have specific genes that are coded so that they can adapt to changes in the environment. As a result, environmental conditions, such as temperature, do not affect cell specialization. |
| | D) | As a cell develops, certain genes become inactive. When a cell has many inactive genes, it stops dividing and lives as a mature, specialized cell. |
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| 3 | |
What are the four main types of tissues in animals? |
| | A) | epithelial, muscle, vascular, and connective |
| | B) | epithelial, nervous, vascular, and connective |
| | C) | epithelial, nervous, muscle, and connective |
| | D) | epithelial, dermal, vascular, and muscle |
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| 4 | |
What are the names of some different types of connective tissue? |
| | A) | skin and columnar |
| | B) | skeletal and smooth |
| | C) | bone and fat |
| | D) | cardiac and blood |
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| 5 | |
What is a stem cell? |
| | A) | A stem cell is an unspecialized cell that can become any cell in the body. |
| | B) | A stem cell is an unspecialized cell that has finger-like projections to receive and transfer signals to help coordinate body actions. |
| | C) | A stem cell is an unspecialized cell that is used with other cells to form a semi-permeable barrier between the inside and outside of the body. |
| | D) | A stem cell is an unspecialized cell that can be found in blood vessels and the walls of internal organs. |
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| 6 | |
What is the difference between totipotent stem cells and pluripotent stem cells in human embryos? |
| | A) | Totipotent stem cells are found in later development of an embryo; pluripotent stem cells grow in the early development of an embryo. |
| | B) | Pluripotent stem cells can become any cell in the body, while totipotent stem cells can produce many, but not all, types of cells. |
| | C) | The stem cells in a human embryo change from totipotent stem cells to pluripotent stem cells as the embryo develops over time. |
| | D) | Totipotent stem cells are found in the early development of a human embryo; pluripotent stem cells only develop after the birth of the fetus. |
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