A. there is a change in Genetic frequency
The cerebral cortex, the largest part of the brain, is the wrinkly gray outer covering of the cerebrum.
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Answer:
They speed up chemical reactions. Without them you wouldn't be alive. They break down macromolecules, and also lower the amount of energy needed for a chemical reaction to happen.
Answer:
Lichens are not parasitic when they grow on trees, they just use the tree bark as a home. They enrich the soil by trapping water, dust and silt. When lichens die they contribute organic matter to the soil, improving the soil so that other plants can grow there.
Answer:
Juvenile rheumatoid arthritis
Explanation:
Arthritis is a term used to refer a group of diseases that affects the joints such as knees, wrists and fingers.
Juvenile rheumatoid Arthritis is an autoimmune disorder that affects children which means the body attacks itself by mistakenly identifying its own cells as foreign .
The cause of this response is not yet known.
Some of the symptoms of the disease include stiffness, pain, joint swelling, skin rush, fever, slowed growth and fatigue.
It has no cure but in some cases children seem to outgrow the disease.
