Secretariat was one of the most famous racehorses in history. No one knew how Secretariat was able to run so fast and win so many races—until he died. When veterinarians examined Secretariat’s heart, they discovered that it was almost twice the size of the hearts of other racehorses. Secretariat’s large heart, which he had inherited from his mother’s side of the family, enabled him to pump more blood than the hearts of the other horses. Therefore, his cells received more oxygen and he could run faster and longer. What can you most likely infer about Secretariat’s hereditary past?

a
Secretariat’s grandmother on his mother’s side could have had an enlarged heart.
b
Either his mother or his father could have had enlarged hearts.
c
Every one of Secretariat’s ancestors likely had enlarged hearts.
d
Nothing; Secretariat’s heart was large because he ran so much, not because of heredity.

If an older person went to the doctor with a fever, chills, body aches, and a cough, what would the doctor most likely suspect the person has?

Which area of the brain controls the body's ability to fight off stress? question 1 options: synapse, frontal lobe, dendrite, sympathetic nervous system

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.