Why is the scientist limited to one independent variable per experiment?

According to the scientific view, about how many years ago did life on earth begin? A. 3.5 million years ago B. 3.5 billion years ago C. 350,000 years ago

A set of steps used to collect information and to test a hypothesis is called

What are differences between meiosis and mitosis?

A snake species a grass species and a mouse species are part of a food web in an ecosystem rank these three species in their likely order in a biomass pyramid from lowest to highest

Why is mitosis also called asexual reproduction?

The heart makes sure that oxygen taken in by the ... gets to the brain.

Blood is a mixture that is more specifically described as a

If one parent has homozygous dominant tall gene and another parent has heterozygous tall gene, what's the probability of having a child that's short? Tall?

8. Charles Darwin was the first individual to convince the scientific community of the occurrence of biological evolution. He based his findings on observations which he then used to make inferences regarding changes in populations of species.

What do you think might affect how pathogen is spread from person to person