Consider organism that are eukaryotic, are found in both unicellular and multicellular forms may resemble plants but are not photosynthetic, have chitin in their cell walls, and absorb organic nutrients from decomposing material in the environment. These organisms would be classified as which of the following types of organisms?
a. archaea
b. bacteria
c. protozoa
d. fungi
Ans: d. fungi
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Blood and tissue fluids of healthy people
a. contain different normal flora than found on the skin. b. contain the same normal flora as found on the skin. c. contain twice as many bacteria and yeast as found on the skin. d. contain only protozoa as part of the normal flora. e. are generally sterile and contain no microorganisms
One hallmark of speciation is ____
a. lack of change in reproductive behaviors b. a decrease in balanced polymorphisms c. an increase in fixed alleles d. decreased genetic diversity of populations
Successful reproduction can result in a
A) lower chance of future mortality. B) higher chance of future reproduction. C) lower chance of future reproduction. D) lower probability of flowering.
Which of the following is true about histone acetyltransferase (HAT)?
A) HATs will make the chromatin more compacted and less available to transcription regulatory proteins. B) HATs will remove acetyl groups from histone proteins. C) HATs have an overall effect of increasing the positive charges on DNA. D) HATs will add acetyl groups to DNA. E) HATs are usually linked to increasing gene expression.