Answer:
Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost. They have two unique properties that enable them to do this: They can divide over and over again to produce new cells. As they divide, they can change into the other types of cell that make up the body.
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Answer:
It begins in the cytoplasms of the cells ! It then moves to the mitochondria
Answer :
Every object in the universe attracts any other object...
The muscles moved quickly to defend themselves against this new predator by thickening their shells
Answer:
There are several factors that can contribute to the effect an environmental toxin has on the human body. They are:
- Form and innate chemical activity
- Dosage, especially dose-time relationship
- Exposure route
- Species
- Life stage, such as infant, young adult, or elderly adult
- Gender
- Ability to be absorbed
- Metabolism
- Distribution within the body
- Excretion
- Health of the individual, including organ function and pregnancy, which involves physiological changes that could influence toxicity
- Nutritional status
- Presence of other chemicals
- Circadian rhythms (the time of day a drug or other substance is administered)