Which one of the following statements accurately describes a characteristic of red blood cells?
a. they lack hemoglobin.
b. they're convex disks with a large nucleus.
c. they're agents of inflammation.
d. they transport oxygen to all the cells of the body.

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?

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.

People with one sickle cell allele are not likely to get malaria. what is this an example of?