The insects were the first organisms to
(a) show bilateral symmetry.
(b) exhibit segmentation.
(c) fly.
(d) develop lungs.
(c) fly.
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What do all bilaterians have in common? Select all correct choices
A. symmetrical right and left sides B. a distinct back and front end C. a brain instead of a ganglia
One possible use of transgenic plants is in the production of human proteins, such as vaccines. Which of the following is a possible hindrance that must be overcome?
A) prevention of transmission of plant allergens to the vaccine recipients B) prevention of vaccine-containing plants being consumed by insects C) use of plant cells to translate non-plant-derived mRNA D) inability of the human digestive system to accept plant-derived protein
How many phosphodiester bonds are needed to join 50 deoxyribonucleotides in a DNA strand?
A. 49 B. 100 C. 51 D. 50 E. 102
Answer the question using the accompanying figure. In the figure, letter C represents a ____ taxon, which includes
____.
a. polyphyletic; an ancestral species and all of its descendants b. monophyletic; an ancestral species and all of its descendants c. monophyletic; species from different evolutionary lineages d. paraphyletic; an ancestral species and only some of its descendants e. polyphyletic; an ancestral species an only some of its descendants