Carbon, hydrogen, nitrogen and sulphur are elements found in living cells. Which is the least common?

A. Carbon

B. Hydrogen

C. Nitrogen

D. Sulphur

The organisms that produced the oxygen gas in Earth's early atmosphere were

Heat is the transfer of energy. It makes things warmer. Some materials allow heat to flow through them more easily than others.

Why does ice stay at the top of oceans instead of sinking to the bottom? ice is denser than liquid water because the molecules in ice are closer together. ice is less dense than liquid water because the molecules in ice are closer together.

This experiment is an example of hypothesis-based science. What question did the researchers ask? What question did the researchers ask? Do male guppies in pools with pike-cichlid fish have brighter color patterns than females in the pool?

An ecosystem with high species diversity will have many individuals in a species only a few mammals many different types of species many of the same species

The Tasmanian devil has 14 chromosomes in each of its somatic cells, 2n = 14. How many chromosomes would be present in a cell after anaphase of Mitosis?

What will a hypothesis become if it is supported by repeated experimentation

During energy transformations, sometimes energy is destroyed. is that true or false

Your patient has been diagnosed with right ventricular failure. Which of the following abnormalities is not a direct result of this problem Your patient has been diagnosed with right ventricular failure.

Which of the following is an example of sensors working during homeostasis? a blood volume decreasing from lack of water b the pancreas failing to release insulin c acidic blood pH disrupting cell metabolism d energy demands triggering a release of