Overexpression of caudal in the early Drosophila embryo, at a level high enough to overcome inhibition by Bicoid protein, would
A. interfere with the development of both anterior and posterior structures.
B. interfere with the development of anterior structures.
C. have no effect since the cytoplasm has already been determined.
D. interfere with the development of posterior structures.
Answer: B
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Which of the following is NOT characteristic of the phase of the cardiac cycle known as ventricular systole?
A) The atrioventricular valves close B) Atria contract, causing blood to fill the ventricles C) The ventricles contract
antage to the segmentation that is exemplified in the Phylum Annelida? Check all that apply.
_____ Vital structures are repeated in each segment. _____ The annelid may still survive if one segment is damaged. ______ Locomotion is more efficient. _____ Segments can be specialized. _____ The importance of segmentation is unclear.
How much biomass of krill (in kg) is needed to produce 1,000 kg of whale?
a. 100 b. 2,000 c. 10,000 d. 50,000 e. 100,000
What would you predict to happen in an area of the body where blood is relatively cool?
a. CO2 would bind more readily to hemoglobin. b. O2 would bind more readily to hemoglobin. c. CO2 would release from hemoglobin. d. O2 would release from hemoglobin.