Earthworms use ________ as their respiratory surface
A) lungs
B) gills
C) their skin
D) tracheae
C
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Each of the following provides evidence that kinetochore microtubule shortening is directly involved in anaphase A chromosome movement to a pole except
A) Stabilization of microtubules with the drug paclitaxel stops chromosome movement to a pole. B) Treatment that accelerates microtubule depolymerization causes chromosomes to move toward the poles more quickly. C) Antibody inhibition of kinesin depolymerization of kinetochore microtubules interferes with chromosome movement to a pole. D) Laser bleaching of labeled kinetochore microtubules indicates they shorten at the kinetochore as the chromosome moves toward a pole. E) All of the above are evidence that kinetochore microtubule shortening is directly involved in anaphase A chromosome movement to a pole.
Echinoderm larvae are ________________, while echinoderm adults are ________________.
a. radially symmetrical; bilaterally symmetrical b. bilaterally symmetrical; radially symmetrical c. aquatic; terrestrial d. segmented; unsegmented e. gastropods; bivalves
Microorganisms show differential sensitivity to antimicrobial agents.
Answer the following statement true (T) or false (F)
Active transport occurs ________ the concentration gradient across a cell membrane.
A. against B. passively against C. toward D. away from E. in between