In plants, whats is hard, protective structure inside which sperm cells form? ovule or ovary or anther or pollen grain

What structures make the heart an efficient pump?

The only organisms that can occupy the first trophic level are the The secondary consumers because they consume the energy from the producers and the primary consumers.

The food web illustrated above shows plants and animals, but does not indicate bacteria. If bacteria were truly missing from this food web, what is most likely effect on the community

What phase of mitosis shows the chromosomes shortening and thickening?

Suppose you had a hypothesis you believed to be correct. What should you do to make it become a theory?

What is the benefit or advantage of using spectral karyotype

A hypothesis that in non-falsifiable is?

What is the difference between a meteor and a meteorite? A meteor has more mass A meteorite reaches Earth and has not burned up A meteorite orbits the sun and a meteor does not A meteorite glows

How does global warming affect the temperate deciduous forest

Why do mutations make such a large contribution to bacterial genetic variation?