Which greenhouse gas can be generated in the guts of cattle?
a. carbon dioxide
b. nitrous oxide
c. oxygen
d. chlorofluorocarbons
e. methane
E
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Spina bifida is one of the most common and most complex birth defects involving the ____ system
a. nervous b. circulatory c. respiratory d. digestive e. endocrine
The 3 types of horizontal gene flow that occur in
bacteria are __________, __________, and __________. Fill in the blank(s) with the appropriate word(s).
In a mating between individuals with the genotypes IAIB × IOI, what percentage of the offspring are expected to have the O blood type?
What will be an ideal response?
Which of the following is true about spongiform encephalopathies?
A) The disease is tied to a normal cellular prion protein (PrPC) that is found mostly on the surface of neurons. B) Spongiform encephalopathies occur in a wide variety of mammals, but the infectious prions are species specific and do not cause disease in other species. C) Abnormal prions clump together and kill the affected neurons, which accounts for the spongelike appearance of brain tissue found in TSE autopsies. D) When the normal prion protein encounters an abnormally shaped version of itself, PrPSC, the normal prion's shape is changed and it becomes an infectious PrPSC. E) Spontaneous cases of Creuztfeldt-Jakob disease may be caused by mutations during cell division in neuronal stem cells.