Animals in the largest phylum are _____
1.bilateral protostomes
2.unsegmented with a pseudocoel
3.jointed with an exoskeleton
4.segmented with circulatory and digestive systems in all chambers of the coelom
3
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When a neuron membrane potential becomes less negative, it is said to be ____
a. depolarized b. hyperpolarized c. repolarized d. damaged e. activated above the threshold potential
Because golden rice was developed to deal with problems of ____________________ deficiency, it is considered a(n)
____________________. Fill in the blank(s) with the appropriate word(s).
Prokaryotic cells do NOT have
A) genes. B) cilia. C) ribosomes. D) cytoplasm. E) flagella.
Some restriction enzymes do not leave sticky ends when cutting DNA molecules; rather, they cut a restriction site down the middle and leave "blunt-ended" DNA molecules, which do not have any single-stranded nucleotide extensions. Which of the following
is not a likely outcome when trying to insert a gene into a plasmid when both have been cut with the same "blunt-ended" restriction enzyme? A) The gene might be inserted into the plasmid by forming hydrogen bonds. B) The gene might be inserted into the plasmid multiple times in a row. C) The gene might insert into the plasmid in the proper (forward) orientation. D) The gene might insert into the plasmid in the wrong (backward) orientation.