Which of these is a base?

ammonia

HCI

vinegar

HNO 3

During a total lunar eclipse, 1. the moon must be new. 2. the observer must be in the path of total- ity. 3. it must be near the time of one of the equinoxes. 4. the moon's color will be affected by Earth's atmosphere. 5.

What two kind of cells make up phloem? what is the function of each

Define the term organic compounds

Within one chromosome, what is the relationship between the sequence of bases in DNA of one sister chromatid compared to the other?

Sam munches on some almonds. Identify the food group to which almonds belong

The reproductive process that creates genetic variety in a population is

Which statement best describes an ecosystem maintaining a state of approximate equilibrium? (1) Nutrients from decayed organisms are recycled in a forest ecosystem. (2) All the frog species in a South American rain forest become extinct.

Which of these shows the correct pathway through the heart's four chambers after it enters from the vena cava? a. left ventricle - -> right atrium - -> left ventricle - -> left atrium b.

Describe how a planet, solar system, galaxy, and the universe are related in terms of size?

What structural parts do chimpanzees and humans have in common?