An educated geuss or rational about a specific phenomenon

A man pushes a lawn mower with a force of 200N across 50N meters of his lawn. How much work did the man perform?

What value is closest to the mass of the atom? A. 4 amu B. 6 amu C. 10 amu D. 14 amu

Which is a characteristic of plants? They are unicellular. They are made up of prokaryotic cells. They have chloroplasts. They possess mobility.

John is observing a few slides of a human embryo. The first slide shows a neural tube and the second just a compact mass of cells. Which phases of human embryos are the slides? A. First slide: blastula; second slide: gastrula B.

Why is evolution true?

Bones, joints, ligaments, and cartilage are parts of the a) refrigerator b) muscles c) skeleton

Chloroplasts cannot move on their own. How do they move around the cell?

What causes leaves to dry out

And increase in food and a decrease in predators would most likely

Which would provide the body with the most energy? a. Carrying oxygen from the lungs to the cells b. Breaking the bonds in a disaccharide c. Breaking a single carbon bond d. Creating bonds to make a simple sugar