nucleoid
A. a feature of all cells
B. found in prokaryotic cells only
C. found in eukaryotic cells only
D. found in plant cells only
E. found in animal cells only
B. found in prokaryotic cells only
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The nucleosome is a complex of eight histone subunits wrapped by a short DNA strand approximately 10 base pairs long
A. true B. false
Why are there not seven or eight levels to a trophic food chain?
A) lack of biodiversity B) lack of global energy C) lack of trophic efficiency D) lack of primary productivity
Which of the following is an example of exaptation?
A) Some insects do not develop wings when resources are plentiful. B) Human middle ear bones are derived from ancestral gill arch tissue. C) Wings of bats and wings of birds are homologous. D) Mutation rates can increase at higher temperatures.
What kind of interaction occurs when two cardinals (birds of the same species) are trying to build a nest in the same tree?
a. intraspecific competition b. mutualism c. fundamental competition d. interspecific competition