How do you really know when something is alive? What's your test for deciding if something is alive? How would explain your definition of life to a child?

Why is it possible for bacterial cells to obtain new genetic traits while humans cannot?

Many organisms including bacteria do not undergo meiosis. What disadvantages might this pose, and what do they need to do instead?

What is used to represent the genes of an organism

The disease marked by retina deterioration is called

Can someone write about hydrosphere but using 17 words in sentences Aquifer divert drip irrigation estuary flood irrigation glacier groundwater permeable recharge zone runoff seep sewage swamp water table watershed well xeriscaping

What is the term for brief episodes of neurologic deficit caused by temporary interference with blood supply to the brain?

Which of these celestial bodies has a tail? a-asteroid b-comet c-moon d-planet

What is the function of myeloma cells used in the production of monoclonal antibodies?

Describe a simple nervous system. Give an example of an organism that has a simple nervous system.

An example of a parallel choice on a dichotomous key is