What's mass?

A. The sum of the number of protons and neutrons in an atom

B. The force that gravity exerts upon an object

OC. A measure of an element's attraction for electrons

D. A measure of the amount of matter an object contains

True or false as the teacher talks, students hear the voice because particles of air move from the mouth of the teacher to the ear of the student.

Fragile marine ecosystems have been destroyed in the production of this type of energy. water energy nuclear energy fossil fuel energy geothermal energy

How many lobes does a liver of a frog have?

The process of produces a new copy of an organism's genetic information, which is passed on to a new cell.

All the statements below about synovial fluid are true except: a. arthrocentesis is performed as a means to evaluate arthritis and other joint disorders b. synovial fluid is present only in moveable joints c.

What do cells need to do between divisions to make sure that a full set of dna gets passed on to each daughter cell?

True or false: The central nervous system allows us to sense the environment

Which of the following statements is false regarding root hairs? a. they are outgrowths of endodermal cells c. they increase the surface area of the root b. they are outgrowths of epidermal cells d. they absorb water and nutrients

Why is it critical to divide the chromosome number in half?

The amino acid proline is one of the three amino acids that watson describes as having "special properties". what is special about proline?