The Precambrian supereon, in which life first appeared, and diversified to multicellular eukaryotes, lasted approximately ___ of the geologic timescale
Fill in the blank(s) with the appropriate word(s).
85%
Biology & Microbiology
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Cell walls are used by many different organisms for protection from their environment and structural support. These cell walls must obviously be insoluble in water; otherwise, they would dissolve the first time an organism got wet
Which of the following carbohydrates would you expect to be most soluble in water? A) starch B) peptidoglycan C) cellulose D) chitin
Biology & Microbiology
Sking and answering questions about the world in an unbiased manner is referred to as ____
Help with this please?
Biology & Microbiology
Which chemical is responsible for the thinning of eggs from seabirds?
a. Chlorine b. Sewage c. DDT d. PCBs
Biology & Microbiology
Bacteria usually adapt their internal environment to match their external conditions.
A) True B) False
Biology & Microbiology