The toxins produced by the deadly poisonous Amanita virosa, the destroying angel, that causes liver failure are
a. aflotoxins
b. amatotoxins
c. phallotoxins
d. basidiotoxins
e. both b and c
Ans: e. both b and c
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The leaves of ginkgo trees have:
A. unbranched veins B. forked veins C. multiply branching veins D. veins in a netlike pattern E. veins only around the edges
What change would allow a chemical reaction to proceed more quickly, while only minimally increasing the energy input required?
a. denaturing the substrate b. adding a catalyst c. heating the reactants d. diluting the products
Some bacteria in the deep oceans use iron as an
energy source to make carbohydrates from carbon dioxide. These bacteria would be classified as
a. chemoautotrophs. b. chemoheterotrophs. c. photoautotrophs. d. photoheterotrophs. e. decomposers
What is the trophic level of the robin in this food chain? Oak tree > caterpillar > robin > fox
a) first-level consumer b) third-level consumer c) producer d) second-level consumer