The two main parts found on the majority of leaves are
A. blade and petiole.
B. blade and fruit.
C. axillary bud and blade.
D. node and axillary bud.
E. node and internode.
A. blade and petiole.
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________ is the most abundant greenhouse gas.
Fill in the blank(s) with the appropriate word(s).
If you were working for a pharmaceutical company as part of a drug discovery team, which of these enzyme inhibitors would you suggest as a productive avenue for drug development?
A) a drug to treat high blood pressure that reversibly inhibits an enzyme catalyzing production of a chemical that causes blood vessels to contract B) a drug to treat diabetes that irreversibly inhibits an enzyme in the metabolic pathway to synthesize glucose C) a compound that acts as a competitive inhibitor for a digestive enzyme produced only in the presence of certain foods D) a compound that inhibits enzymes by significantly changing the pH throughout the body
Which statement is not true about MHC II?
A) MHC II interacts with the CD4 receptor on T helper cells. B) MHC II primarily displays extracellular antigens which have been phagocytized. C) MHC II is present only on antigen-presenting cells. D) When bound to antigen, MHC II serves a key role in activation of the appropriate T cells. E) MHC II interacts with both the CD4 and CD8 receptors on T helper and T cytotoxic cells.
Brown algae lack true roots but have similar structures called __________ that anchor them to the
substrate. a. stipes b. fronds c. holdfasts d. blades e. thalli