Members of phylum Nemertea have a tube-with-a-tube body plan
____________________ Indicate whether the statement is true or false.
T
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The type of plant hormone primarily responsible for promoting the formation of lateral roots is/are ____
a. jasmonates b. gibberellins c. auxins d. systemin e. cytokinins
Antihistamines dampen the effect of allergic
reactions by a. blocking the production of histamines. b. blocking the release of histamines. c. blocking the effect of histamines. d. enzymatically destroying the histamines. e. none of these.
Myosin heads contain
a. actin. b. myofibrils. c. ATP d. ADP e. ATPase.
Does the ability to disperse over long distances lower a species' chance of extinction?
a. Yes, as data on Cretaceous gastropods show that species with higher dispersal ability have lower extinction rates. b. No, there is no relationship between a species' dispersal ability and its range. c. Not necessarily, this is only the case if species range correlates positively with dispersal abil-ity. d. No, in Cretaceous gastropods species with long range dispersal have an increased chance of extinction.