Which of these are characteristics of all three main groups of worms? Check all that apply.

They lack nerve cells.

They can reproduce sexually.

They display bilateral symmetry.

They have a single tissue layer.

They are invertebrates.

Which algae is responsible for main supply of oxygen in the atmosphere? green algae brown algae red algae blue algae

1 A large molecule of DNA is composed of smaller molecules called

During glycolysis, the body a. converts two fatty acid molecules into glucose molecule b. synthesizes one amino acid molecule from one carbon dioxide molecule and two molecules c. breaks down one glucose to form two pyruavte molecules d.

What is the primary difference between a hypothesis and a theory?

Bright-field microscopes are used for most microscopic work. True or false?

Is cytoplasm prokaryotic or eukaryotic

Professor Jones surveyed her six classes and found that students who slept less than 5 hours the night before an exam received lower exam scores than those students who slept 7 hours or more.

When do babies' eye colors change?

three ways minerals form

Based on your knowledge of signal amplification, which type of chemical messenger can have relatively small concentrations within the bloodstream and still get a large response?