Biology, 22.07.2019 00:30 noahslambeenie359
Need asap will mark sully works as a geologist in the southwestern united states. he plans to choose an unstable isotope to find the absolute age of a rock sample. which two aspects must he consider before making his choice? (more than 1) 1. there should be a sufficient amount of the selected isotope in the rock. 2. the isotope should be one that decays at a very fast rate. 3. the isotope must not be found in any neighboring rocks. 4. the half-life of the isotope must be long enough to capture the age of the rock. 5. there should be more than one unstable isotope in the rock.
Answers: 2
Biology, 22.06.2019 03:40
Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons
Answers: 3
Biology, 22.06.2019 11:20
2polnis which of the following is an advantage of an in vitro experiment?me
Answers: 1
Biology, 22.06.2019 13:00
Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?
Answers: 3
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.
Answers: 1
Need asap will mark sully works as a geologist in the southwestern united states. he plans to choo...
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