The earliest pollinators of flowers were probably ____ that visited flowers to chew on the petals and leaves
a. mice
b. bees
c. earwigs
d. beetles
e. grasshoppers
d
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Bacillus anthracis deficient in its ability to differentiate would not be able to
A) chemotax towards growth substrates. B) create vessicles. C) form endospores. D) grow without additional supplemented nutrients.
The plasma cells of the immune system are responsible for secreting protein antibodies into the bloodstream. Within the plasma cell, the antibody moves through several organelles in what order?
A. Ribosomes, endoplasmic reticulum, nucleolus, Golgi apparatus, vesicles B. Ribosomes, endoplasmic reticulum, Golgi apparatus, vesicles C. Ribosomes, vesicles, endoplasmic reticulum, Golgi apparatus D. Ribosomes, Golgi apparatus, endoplasmic reticulum, vesicles E. Ribosomes, Golgi apparatus, endoplasmic reticulum, lysosome
Plants can generally absorb and make use of nitrogen in the form of
a. NO3 ? only. b. both NO3 ? and NH4 +. c. NH4 + only. d. N2 only. e. both N2 and NH4 +.
Which of these is a tRNA? The figure shows a process of translation. Each letter marks a definite structure.
A marks the thread, to which the ribosome is attached. This thread is the base of the translation. B marks the structure, which is bonded with Gly and is located inside the ribosome. C marks the structure, in which the translation happens. D marks the thread, which is formed by the translation. Letter E marks the structures, which are constituent elements of the forming thread.