Answer:
1.5 million years ago
Explanation:
Fire was first controlled by humans anywhere from about 230,000 years ago to 1.4 or 1.5 million years ago, depending on which evidence you accept as definitive. Evidence for the use of fire by Homo Erectus beginning some 400,000 years ago has wide scholarly support.
Answer:
Cells are small because they need to keep a surface area to volume ratio that allows for adequate intake of nutrients while being able to excrete the cells waste. That is why the cell needs to be small. The smaller it is, the larger the surface area to volume ratio is. ... This is why cells are so small.
explicación:
The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. ... That is why cells are so small.
Hypothalamus, it is the control center for hormone secretion
Explanation:
For Organelles that are the same are
Nucleus
mitochondria
endoplasmic reticulum
For Organelles that are not the same are
cell wall
chloroplasts
