Coursebook questions - page 44 Questions
1 Name the red pigment inside red blood cells that helps to carry oxygen,
2 Name the large blood vessel that carries blood from the heart to the lungs.
3 Using what you know about particle theory, explain how oxygen diffuses
from an air sac into the blood.
4 The walls of the air sacs and the capillaries are both very thin. Suggest
how this helps gas exchange to take place quickly.
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All cells have the same genetic information, but do not express the same genes. how is this possible? question 10 options: the differences are due to gene expression, which can be turned on and off. genetic material in a muscle cell is completely different from genetic material in a skin cell. genetic material is the same in all cells in the human body, except for reproductive cells. differences are due to major changes in genetic information from cell to cell.

Aphids are tiny insects that feed on plants. ladybugs are to plants because they eat aphids. which type of organism are aphids in this scenario? co decomposers predators prey producers

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called