The sperm and the ovum are sex cells or

Sound waves cannot travel in a cacuum because?

What is the motion of a smaller body around a larger body in space called?

The ability of a muscle to exert force is: a. strength b. endurance c. fitness d. flexibility

In which way is any single observation of wind speed best described?

How much does the sun's cycle influence overall temperature on Earth?

Which organelle is responsible for poviding a barrier?

Which of the following are outputs of the process of photosynthesis? A. Energy from food and oxygen B. Energy from the sun, carbon dioxide, and water C. Nutrients from food and oxygen D. Food and oxygen

Which of the following are examples of ways humans and plants have coevolved? Pick all that apply A. Humans have bred plants to use as food B. Plants provide a source of nitrogen C. Humans aid in pollinating plants D.

By what mechanism does PI-3 phosphate promote activation of protein kinase B (PKB) ? a. recruiting PKB to the plasma membrane b. recruiting the activating kinase PDK1 to the plasma membrane c.

What is the definition of "Mass"?