The members of the ____ subphylum have a three-part body plan: a head, thorax, and abdomen
a. Myriapoda
b. Trilobita
c. Chelicerata
d. Hexapoda
e. Crustacea
ANSWER: d
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Evidence for the extinction of the dinosaurs approximately 65 million years ago comes from meteorites containing:
A. iridium. B. palladium. C. carbon. D. silicon. E. plutonium.
Four of the five choices listed below are
characteristic of sclerenchyma cells. Select the exception. a. sclereid b. found in seed coats c. retain the ability to divide after differentiation d. gritty texture of pear cells e. used in manufacture of paper, textiles, and rope
What would life on Earth be like today if eukaryotic protists had not evolved?
What will be an ideal response?
You are interested in understanding the regulation of nuclear lamina assembly
To create an in vitro system for studying this process you start with partly purified nuclear lamina subunits to which you will add back purified cellular components to drive nuclear lamina assembly. Before you start doing experiments, your instructor suggests that you consider what type of conditions would be most amenable to the assembly of the nuclear lamina from its individual subunits in vitro. Which of the following conditions do you predict would be most likely to enhance the assembly of the nuclear lamina? (a) addition of phosphatase inhibitors (b) addition of ATP (c) addition of a concentrated salt solution that is 10 times the concentration normally found in the nucleoplasm (d) addition of protein kinase inhibitors