Answer:
Calcitonin stimulates the kidneys to absorb calcium when calcium levels are too low, while parathyroid hormone stimulates the kidneys to excrete calcium when calcium levels are too high.
Explanation:
Answer: Bears are classified as caniforms, or doglike carnivorans, The lion is a species in the family Felidae
The oldest known minerals are 4.4 billion years old.
Answer:
well you either have eukaryotic or prokaryotes : Eukaryotic being us humans (the one special thing we have in are cells to function is a Nucleus, which holds genetic material), and then Prokaryotic which just dont have a Nucleus
Answer:
In many senses, Darwin's theories created a societal transformation. Darwin's theory consisted of two main points; 1) diverse groups of animals evolve from one or a few common ancestors; 2) the mechanism by which this evolution takes place is natural selection.
Explanation:
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