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Isotopes of the same element have a different atomic mass because they contain more or less _____.

Cell Theory states that cells are the fundamental units of all living things. Which of the following statements is NOT part of Cell Theory?

A type of cell called a beta cell is found in the pancreas and makes insulin (a type of protein) that is exported from the cell into the blood stream. Which of the following might be the path of insulin fromthe organelle that manufactures it to where it enters the blood stream?

Many bacteria and fungi serve the role of _____________ within ecosystems.

Which of the following statements is true about passive transport?

Each Domain can be divided into Kingdoms based on the characteristics of the organisms within it. Which of the following Kingdoms represents mostly single-celled organisms that have a nucleus, but just don’t fit into Animalia, Plantae or Fungi?

A glucose molecule is to starch as _______________________.

Radon is a radioactive gas that seeps into homes from the soil. It is thought to be a leading cause of lung cancer in humans. In order to investigate this, a research team measures the rate of lung cancer in 6 neighborhoods, 3 with high radon levels, and 3 with low radon levels. After analyzing these data, the researchers conclude that the more radon there is in a house, the more likely it is that the people living there will develop lung cancer. Another research team criticizes this study by asserting that the high radon neighborhoods also have a higher percentage of old people and cigarrette smokers than the low radon neighborhoods. Both advanced age and smoking are known to increase lung cancer rates. Assuming the criticism is correct, the radon study suffered from _________.

Energy exists in two states, energy that is stored and not in use is called _______ energy, while energy that is being used and is in motion is called _______ energy.

The bond formed by the electromagnetic attraction between oppositely charged atoms is a(n) _______ bond.