Cells need increased surface area for diffusion of nutrients and wastes. Cells increase their surface area by
A. having microscopic extensions of the cell membrane.
B. having a flattened shape.
C. being long and thin.
D. having specialized organelles to move components throughout the cell.
E. All of the answer choices are correct.
E. All of the answer choices are correct.
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Collagen is a tough, stretch-resistant protein. You would be most likely to find collagen in which type of tissue?
A. nervous B. muscular C. epithelial D. connective E. epithelial and connective tissue
Four of the five answers listed below are related by a common phase of mitosis. Select the exception
a. chromosomes align at the spindle equator b. sister chromatids become individual chromosomes c. centromeres divide d. the chromosomes move apart e. spindle microtubules shorten, pulling chromosomes toward the poles
A plant's lateral roots arise from the
a. endodermis b. epidermis c. phloem d. xylem e. pericycle
The activity of ________ would be quickly undone in the absence of single-stranded binding protein
A) DNA helicase B) DNA ligase C) DNA polymerase III D) primase E) DNA polymerase I