Why is it very dangerous to eat wild mushrooms without proper training? What will be an ideal response?
ANSWER: While many mushrooms are edible, not all are. Some like the Amanita phalloides can make you sick or even kill you. Others may contain compounds that could result in a dangerous
psychotic experience. As a result, you should leave the selection of edible mushrooms to the
experts.
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The red algae are classified as
a. rhodophytes. b. chlorophytes. c. phaeophytes. d. bryophytes. e. pterophytes
Which of the following are ways that usable
nitrogen is removed from the soil? a. nitrification b. leaching c. nitrogen fixation d. ammonification e. all of these
Repressible genes are usually actively transcribed when:a
repressor molecules bind to the promoter. b. the supply of the end product formed by the enzymes encoded by these genes is low. c. tryptophan accumulates in the cell. d. quantities of precursor materials are high. e. there is no other substrate that can be used by the cell.
In Figure 8.1, which colonies are streptomycin-resistant and leucine-requiring?
A) 1, 2, 3, and 9 B) 3 and 9 C) 4, 6, and 8 D) 4 and 8 E) 5 and 6