Which point mutation would be most likely to have a catastrophic effect?
A) The deletion of three bases near the start of the coding sequence
B) A base insertion near the end of the coding sequence
C) A base deletion near the end of the coding sequence
D) A base substitution
E) A base deletion near the start of the coding sequence
E
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Removing plants from an area, as we do when we harvest crops, removes a great deal of nitrogen. One of the ways farmers enable soils to naturally recover is:
A. adding human made fertilizer. B. planting the field with legumes. C. adding bacteria to the soil. D. leaving the soil bare, removing any plants that would consume nitrogen.
The primary oocyte will mature into a(n) ________
a. sporophyte b. spermatocyte c. gametophyte d. spermatid e. egg
Spiders and scorpions belong to the phylum containing the
A. annelids. B. cnidarians. C. arthropods. D. echinderms. E. mollusks.
What is the difference between cytokinesis and karyokinesis? Which process needs to be more precise for accurate cell division?
What will be an ideal response?