Answer:
Iodine
Explanation:
Iodine is needed by animals because the body's metabolic rate is controlled by the action of an iodine hormone, called thyroxine, which is secreted by the thyroid gland in the neck.
If the animal fails to supply enough iodine through food to be able to make a normal amount of this compound, then the thyroid gland enlarges or expands trying to create enough, resulting in a common type of goiter.
thin walls.
a moist inner surface.
a huge combined surface area.
Answer:
Amphibians
Explanation:
They had just shown up during the Carboniferous period and were still living in the water.
Answer:
Francis Galton
Explanation:
Francis Galton was interested in anthropology, statistics, geography, and psychology, he try to measure i
ntelligence scientifically through <em>reaction time tests. </em>
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