The answer is external stimulus
Answer:
1.true2.true3.true
Explanation:
sorry not sure about this answer
The green sample possibly contains algae or some other sort of bacteria
C. Changes to biodiversity can positively and negatively affect an ecosystem.
Explanation:
The production and release of thyroid hormones, thyroxine and triiodothyronine, is controlled by a feedback loop system that involves the hypothalamus in the brain and the pituitary and thyroid glands. ... This system allows the body to maintain a constant level of thyroid hormones in the body.
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