Which tool was not used by ancient explorers to assist with navigation?

Can allergens cause anaphylaxis

Neuroscientists, psychologists, and educators generally believe that teenagers need firm and consistent home and school environments that support learning and development.

What is the name of sugar molecule in the DNA helix

How does one organism affect another's evolution?

You are studying a population of pea plants which flower colors ranging from white to dark pink. You selected only those plants with the darkest pink flowers to use in cross-pollination.

If there is a mutation, and the wrong amino acid is put into sequence, what is the result?

What is tolerance (explanation)

Which actions should a nurse take while caring for a preschooler whose blood lead level is found to be 25 mcg/dl? select all that apply?

Sodium benzoate is a bitter chemical often used in tiny amounts as a food preservative. The ability of humans to taste sodium benzoate is caused by a dominant allele, t. The recessive allele ("non-taster") is n.

Which of the following correctly displays the sequence of developmental milestones? A) blastula → gastrula → cleavageB) cleavage → gastrula → blastulaC) cleavage → blastula → gastrulaD) gastrula → blastula → cleavage