Which of the following animals do NOT have
tissues?
a. sponges
b. annelids
c. roundworms
d. cnidarians
e. more than one of these animals does not
have tissues
A
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The contacts between the DNA and the histones of the nucleosome are:
A. mainly between the R groups of the histones and the phosphate backbone of the DNA. B. mainly between the conserved histone folds and the bases that are exposed in the major groove of the DNA. C. mainly between the conserved histone folds and the bases that are exposed in the minor groove of the DNA. D. more prevalent in regions of the DNA that have tracts of G?C base pairs. E. primarily between the DNA and the histone peptide backbone.
Why are red algae found in deeper oceanic waters?
A. They possess pigments that allow them to utilize red light. B. They are able to utilize the more saline deep water. C. Red algae prefer the warmer deep water. D. They possess pigments that allow them utilize blue-green-light. E. Fewer algae predators are found in deeper water.
Consider the Calvin–Benson cycle and the noncyclic photosynthetic pathway. Why is the cyclic pathway so important?
What will be an ideal response?
"Rice water stools" are characteristic of
A) salmonellosis. B) cholera. C) bacillary dysentery. D) amebic dysentery. E) tapeworm infestation.