Biology, 23.04.2020 20:17 skarimi740
A certain element has a half-life of 1,000 years. How much of a sample of this element remains after 2,000 years?
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Biology, 21.06.2019 18:00
Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.
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Biology, 21.06.2019 19:10
What are the types of mutations, and how does each alter the encoded protein? college level answer
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Biology, 22.06.2019 13:00
Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.
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Biology, 22.06.2019 13:20
Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.
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A certain element has a half-life of 1,000 years. How much of a sample of this element remains after...
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