The graph indicates the number is species that have become extinct

The paramecium was the only unicellular organism that Stella viewed through her microscope. All the other organisms were multicellular. How was the unicellular specimen different from the multicellular organisms?

What is plant cells made of

Not all individuals in a population will survive to reproduce. Those that do, pass their to their offspring.

In a single molecule of water, two hydrogen atoms are bounded to a single oxygen atom by what

Proteoglycans are a group of macromolecules formed from: a. proteins and glycosaminoglycans. b. proteases and glycosaminoglycans. c. proteins and glycogen. d. proteases and monosaccharides. e. proteins and polysaccharides.

What's the relationship between solutions, solutes, and solvents?

Many diseases are caused by viruses or bacteria, which may be considered introduced species under certain circumstances (although viruses are not truly living organisms and need another organism as a host).

Read the following excerpt about water availability to living organisms. "Water covers 75 percent of Earth. 97 percent of water on Earth is salt water.

Which molecule is called "molecule of hereditary?

At what week can you tell the gender of a baby