This is an organic substance made of the elements C, H, and O; it is usually found in long chains in lipids; a glycerol and three of these form a fat or lipid. What is the substance?

If a characteristic is sex-linked, it A. Occurs most commonly in males B. Occurs only in females C. Is always fatal D. Can never occur in females

What % of living things have a range of tolerance

Construct a food web, and explain the interactions of the organisms that compose it

Natural exposure to an antigen may cause active immunity T or F

In which state of matter are particles most distant from one another

One student did an experiment with sea water. The steps of the experiment are shown below. Heat 0.5 liters of sea water in a beaker. Observe the sea water boil after about 5 minutes. Continue to boil the sea water till its volume becomes 0.1 liters.

Which object performs a function similar to that of the human body's skin? A. camera lens B. house frame C. astronaut suit D. telephone wire

Muscle tissue can be stimulated by the nervous system. Cells with the ability to change their membrane potential have what property?

The reactants collect in the a. Nucleus. B. Chloroplast c. Stem

Why might the risk of infectious disease be high in a community that has no water treatment facility?