Which tissue within a leaf has the most chloroplasts?
a. xylem
b. phloem
c. epidermis
d. spongy mesophyll
e. palisade mesophyll
e
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Red blood cells in mammals ____
a. have a large nucleus when they enter circulation b. do not have a nucleus when they enter circulation c. are the only cells to lack hemoglobin d. develop in the yellow marrow e. function as part of the immune system
Darwin called differential reproductive success due to variation among individuals in success at getting mates ________
A) sexual success ratio B) sexual selection C) reproductive selection D) dimorphic selection
Which of the following statements is NOT correct about the arrangement of tissues in the eudicot root?
A. The star-shaped phloem is located in the center of the vascular cylinder, with xylem arranged between the arms of phloem. B. The pericycle is the outer layer of cells in the vascular cylinder, with the ability to form secondary or branch roots. C. The epidermis of the root has no cuticle on its outer surface, unlike other epidermal tissues. D. The Casparian strip is a waxy lining on four sides of the cells of the endodermis, which forces water into the endodermal cells. E. The specialized root tissues are seen at the zone of maturation.
James misspoke at the banquet last night and became embarrassed. His face looked red because the facial arteries and arteriole muscles relaxed. These arteries and arterioles were ________
A) dilated B) burst C) clogged D) constricted