Which structure is also called the windpipe? the pharynx the larynxthe tracheathe bronchus

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

An organism's reproductive strategy includes all of the following except a. the number of offspring produced. b. the amount of energy expended in producing offspring. c. the length of time parental care is given d. the number of alleles an organism passes on.