Sodium chloride, or Na+Cl-, is an example of a molecule whose atoms are held together by which of the following? A. Hydrogen bonds B. Covalent bonds C. Metallic bonds D. Ionic bonds

What statement about carbohydrates is true

Two angles are complementary, The first angle measures 35 degrees. What's the measurement of the second angle?

A microbiologist has isolated a bacterium from his face and wishes to determine whether it might be a member of the normal microbiota. Which of the following would NOT be evidence for such a conclusion? The bacterium is extremely salt tolerant.

This low-lying plant that requires damp surfaces and does not have a system to transport water is a

The cells provide a means of acquiring nutrients in the brain. a. Astrocyte b. Microglia c. Ependymal d. Oligodendrocyte

Which state of matter is the rarest on earth? a. solid b. liquid c. gas d. plasma

Once supported by a predictable experimental outcome, a scientific hypothesis a still cannot be considered to have been proven true. b. can be used to predict the outcome of all future similar events. c is elevated to the status of theory. d.

Which kind of investigations are meant to provide large amounts of information about a wide range of variables

What specific powers are given to the government under the Constitution

A scientist is investigating mutations. She observes a mutation where one or more nucleotides are inserted into a sequence of DNA. The scientist claims that this insertion mutation will affect genetic variability.