To restart a heart, rescuers use
a. CPR.
b. a defibrillator.
c. CPR and a defibrillator.
d. serotonin injections.
e. all of these.
B
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Beechdrops is a parasitic plant that cannot perform photosynthesis but relies on its host the Beech tree. However, Beechdrops still retains many if not all of the genes for photosynthesis
Snapdragons and gladiolas are common garden flowers that rely on their ability to perform photosynthesis. If you were to compare the gene sequences for these three plants for ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) a protein necessary for photosynthesis what would you predict? A. The differences between gladiolas and snapdragons would most likely be silent mutations while those in beechdrops may be silent or missense B. Since these three plants are not highly related the sequences for RuBisCO would be very different between them C. The differences between gladiolas and snapdragons would most likely be in the second nucleotide of codons while beechdrops would have a higher number of mutations in the third nucleotide of the diffferent codons D. The differences between gladiolas and snapdragons would most likely be missense mutations while those in beechdrops may be silent or missense
Which species of wheat is the first polyploid in the
sequence? a. A b. B c. C d. D e. E
Holoprosencephaly is a highly variable condition in mammals, including humans. Its effects range from an absence of brain areas, mid-face disorders, and cyclopia to slight dental abnormalities. One form, HPE3, is caused by Shh mutations
Familial cases are inherited as dominants. Which of the following do you expect? A) HPE3 is actually a multigene complex. B) Each type of malformation is due to a different HPE3 allele. C) HPE3 expression is modified by genetic background. D) HPE3 individuals also share a common environmental exposure. E) All mutations in Shh that result in HPE3 are due to frameshifts.
Fossilized remains of humans and their immediate ancestors are found:a
only in rock formed from volcanoes. b. only in relatively young rock. c. in any rock from areas inhabited by humans. d. only in rock from the Precambrian times. e. only in relatively old rock