Why using two manipuled variables in an expierement would be wise

Why should precision and accuracy be reported in a scientific investigation?

When a human or animals die what happens?

Some flowering plants have a long pistil that reaches way above the lower petals. What's the purpose of this structure?

If meiosis produces haploid cells, how is the diploid number restored for those organisms that spend most of their life cycle in the diploid state?

What Is The purpose of Testosterone in the development of the male?

Which organelle modifies cell product packages them for distribution and then may turn into vessels in bubbles off the surface of the cell

Describe two ways in which communication in the endocrine system and in the nervous system are different and one way in which they are similar.

One of mrs. morgan's fractures is described as being located on the proximal diaphysis. which of these phrases best describes the anatomical location of this fracture?

When a cell divides in mitosis, how do the daughter cells compare to each other?

What is one main human activity that causes smog, acid rain and contributes to global warming?