Which of the following extremophiles might researchers most likely use as a model for the earliest organisms on Earth?
A) a bacterium found on another planet or moon
B) an archaean capable of surviving in the polar ice caps
C) an anaerobic archaean species
D) a bacterium that thrives in a highly acidic environment
C
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Where are ectomycorrhizae MOST commonly found?
A) boreal and temperate forests B) forests with especially low nutrients C) tropical forests D) boreal and temperate forests, forests with especially low nutrients, and tropical forests
A Gram-positive bacterium is characterized by the
a. presence of a thin cell wall. b. presence of a thick cell wall. c. absence of a cell wall. d. presence of an outer membrane. e. absence of ribosomes.
In the figure above, ____ is responsible for soft tissue support
a. tissue A b. tissue B c. tissue C d. tissue D e. tissue E
What is selective breeding?
What will be an ideal response?