Classification.The following items are part of the cytoskeleton. Respond to the statements below with reference to these elements.
A. Theseform a dynamic scaffold for cellular processes.
B. These make up the cell cortex.
C. These fine fibers function in contraction.
D. Theseare the most stable cytoskeletal elements.
E. These molecules function like cellular freight trains.
F. The coordinated movement of many of these stirs fluid around some cells.
G. This is a very visible structure in human sperm.
H. This structure is elongated by microfilaments.
I. These temporary structures allow cells to engulf targets.
A. Microtubules
B. Microfilaments
C. Microfilaments
D. Intermediate filaments
E. Motor proteins
F. Cilium
G. Flagellum
H. Pseudopods
I. Pseudopods
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Evaluate the following statements; which statement is accurate?
A. Scientists use the word theory to mean a hypothesis that has not been tested many times; this is the same way non-scientists use the word theory. B. Scientists use the word theory to mean a hypothesis that has been supported by many experiments; this is the same way non-scientists use the word theory. C. Scientists use the word theory in the same way that they use the word hypothesis; both mean a general idea that remains to be well tested. D. Scientists use the word theory to mean a hypothesis that has been supported by many experiments; non-scientists use the word theory to mean a hypothesis that remains to be well tested.
Reproduction in sponges includes all except:
a. budding. b. sexual. c. fragmentation. d. cloning.
Athletes who consume adequate carbohydrates experience all of the following EXCEPT
a. reduced risk of chronic fatigue. b. adequate liver glycogen stores. c. increased body fat. d. adequate muscle glycogen stores.
The rough endoplasmic reticulum is studded with:
a. ribosomes b. vacuoles c. nucleoli d. proteins