An element is defined by its number of what?

protons

electrons

neutrons

all particles

How does the property of cohesion affect the way liquid water behaves? When water freezes, it becomes less dense. Water forms droplets whenever possible. When water vaporizes, it stores more energy than liquid water stores.

How do the effects of radiation in coastal areas, forest areas, and desert areas compare?

Which is the most likely cause of the observed variation?

what is the term used to describe the intake of a vitamin or mineral that greatly exceeds the recommended amounts?

A cell in an embryo that still resembles the original cells of that embryo but will eventually form the spinal cord is ___.

Which describes organs in the human body? the largest living unit a group of cells that work together to perform a common function a group of tissues that work together to perform a common function the smallest living unit

Horses and donkeys can breed and produce sterile offspring known as mules. Horses and donkeys remain separate species because of this hybrid sterility, which is: 1. an allopatric barrier to reproduction. 2. a postzygotic barrier to reproduction. 3.

A group of cells working together is known as what

What do amoeba proteus, dinoflagellate, and euglena viridis have in common? a. they all can move and make their own food b. they all can move and use eye spot to locate food c. they all can move and be heterotrophic d.

How is a scientific hypothesis best evaluated?