The mucus in your nose and the acid in your stomach are both front-line defenses against pathogens. which of the following is also a front-line defense?

a- your antibodies
b- your leukocytes
c- your t-cells
d- your skin

Poliovirus is an rna virus of the picornavirus group, which uses its rna as mrna. at its 5' end, the rna genome has a viral protein (vpg) instead of a cap. this is followed by anontranslated leader sequence, and then a single long protein-coding region (~7000 nucleotides), followed by a poly-a tail. observations were made that used radioactive amino acid analogues. short period use of the radioactive amino acids result in labeling of only very long proteins, while longer periods of labeling result in several different short polypeptides. what conclusion is most consistent with the results of the radioactive labeling experiment? a) host cell ribosomes only translate the viral code into short polypeptides. b) the rna is only translated into a single long polypeptide, which is then cleaved into shorter ones. c) the rna is translated into short polypeptides, which are subsequently assembled into large ones. d) the large radioactive polypeptides are coded by the host, whereas the short ones are coded for by the virus.

The hazard communication standard has requires that each container holding a hazardous chemical have a warning label that is easily seen . what information must the label contain ?

Checklists and rating scales can be used to monitor children’s developmental progress and to diagnose developmental delays. true false