A bond between two atoms caused by a transfer of an electron, such as in table salt (NaCl), is called a(n) __________.

The control in an experiment…

The pH scale has values from 0 to 14. A substance with a pH of 2 would be considered a(n) _______________.

Each accurately describes the physical effects of food on periodontal health, except one. Which is the exception?

Oral manifestations of renal (kidney) disease include each, except one. Which is the exception?

Which is NOT a factor related to loss of smell?

Each is a sign of vitamin B12 deficient megaloblastic anemia, except one. Which is the exception?

A pedigree shows many more affected males than females and no affected father passes the trait directly to his sons. Which inheritance pattern is most strongly supported?

Which observation from a chromosome-modeling laboratory would most directly contradict the normal mechanism underlying Mendel’s Law of Segregation?

A plant recorded as having the dominant phenotype is test-crossed with a homozygous recessive plant, but every offspring displays the recessive phenotype. Which next step is most scientifically appropriate?