The oldest proglottid of a tapeworm is
(a) the scolex.
(b) the one nearest its neck.
(c) the one in its middle.
(d) the one at its end.
(d) the one at its end.
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Which of the following codons is associated with the amino acid phenylalanine?
A) AAA B) UAG C) AUG D) AAC E) UUU
If an injection to the mouse contains live R strain and heat-killed S strain Streptococcus pneumonia, ____
a. the mouse will live b. the mouse will became fatally ill and live S strain bacteria will be detected in its blood c. the mouse's blood will contain live pathogenic R strain bacteria d. the dead S strain bacteria will transform to live R strain bacteria e. DNA from the live R strain bacteria will revive the dead S strain bacteria
You wish to prevent transcription of all three types of RNA in bacteria. How many different types of RNA polymerase would you need to inhibit?
What will be an ideal response?
Looking at the figure above, which of the following trees are equivalent?
a. The most recent common ancestor, species 2, is more closely related to species 1 than to species 3. b. The most recent common ancestor, species 2, is more closely related to species 3 than to species 1. c. The most recent common ancestor, species 1, is more closely related to species 3 than to species 2. d. The most recent common ancestor, species 1, is more closely related to species 2 than to species 3.