Why didn't farmers used to eat the best of the seeds that they produced?

Why does Felsic lava tend to produce composite volcanoes and cinder comes rather than shield volcanoes?

All evolutionary changes that allow a species to change in response to the environment are originally a result of A) beneficial DNA mutations. B) movement to new environments where survival is easier.

If the Oort cloud contains 1012 comets, and ten new comets are discovered coming close to the Sun each year, what percentage of the comets have been "used up" since the beginning of the solar system?

What happens if someone get a bone marrow stem cells transplant what will happen to there blood stem cells after being transplanted

Does a prokaryote cell have vacuoles

Why is it necessary to do a spinal tap when you suspect a bacterial infection of the central nervous system? why can't you use a blood test?

Name the major greenhouse gasses and how they get into the atmosphere

Which type of cell goes through the determination process?

What organic molecule is the basis of enzymes.?

Which transport mechanisms require the formation of a vesicles to transport material into or out of the cell? A: diffusion and osmosis B: exocytosis and calcium pumps C: exocytosis and endocytosis D: diffusion and facilitated diffusion