________ describes the process whereby a leukocyte exits a blood vessel and moves into an infected region of tissue.  

A small child enters a clinic for the third time in one month with another bad skin infection filled with pus (tissue fluid combined with large numbers of bacteria growing in the fluid). Decreased numbers, or loss of function, in which of the following cell types could account for these symptoms?  

Which of the following describes an SNP?

When a foreign invader infects a human host, what is likely the first responder for the immune system?

How does a macrophage destroy a pathogen?

A person inhales a potentially pathogenic bacterium. What defenses will the bacterium encounter as it travels through the human body? (Mark all that apply.)

The job of a natural killer cell is to ________.

Escherichia coli bacterium doubles every 10 minutes and you have a starting inoculum of 50 colony forming units (CFU). How many colony forming units (CFU) will be present after 1 hours?

If you crossed two heterozygous yellow seed pea plants (genotypes Aa), ________.

An organism that cannot grow without oxygen is a(n):