Which of the following threats to biodiversity is targeted at specific species rather than groups of species?

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#Question id: 19237

#Unit 12. Applied Biology

A type of structure, which may act as a transcription termination signal is

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#Question id: 12286

#Unit 10. Ecological Principles

Keystone predators can maintain species diversity in a community if they

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#Question id: 26483

#Unit 2. Cellular Organization

lac repressor binds to

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#Question id: 34118

#Unit 2. Cellular Organization

A. Trypsin treated core histones quickly forms 30-nm fibers

B. Core histones lacking their amino-terminal tails are incapable of forming 30-nm fibers

C. Interaction between the positively charged amino terminus of histone H4 and a negatively charged region of the histone-fold domain of histone H2A is particularly important for 30-nm fiber formation

D. H2A that interact with the H4 tail are conserved across many eukaryotic organisms but are not involved in DNA binding or formation of the histone octamer.

Choose true and false

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#Question id: 5245

#Unit 8. Inheritance Biology

Which method of gene transfer involves direct contact between the bacteria?