The first law of thermodynamics states that energy is constant; it can ____________________, but not _______________.
A) be produced and generated; moved or relocated
B) be increased and decreased; eliminated
C) be transferred and transformed; created or destroyed
D) cycle; flow
E) flow; cycle
C) be transferred and transformed; created or destroyed
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Human embryonic stem cells that are used in research are
A) cultured in the bodies of human embryos from outer cell mass cells. B) cultured in laboratory dishes from inner cell mass cells taken from a very early embryo. C) taken from aborted human fetuses between 10 and 12 weeks of gestation. D) taken from stillbirths that do not have genetic diseases.
What are the different versions of the same gene?
A) alleles B) diploids C) homologous chromosomes D) sister chromatids
Do all cells of the body express the same genes?
A) Yes, since they all contain the same DNA B) Yes, since they all make the same proteins C) No, since they don't contain the same DNA D) No, since they don't all need to make the same proteins
Nitrogen is fixed by soil bacteria and is then incorporated into plant biomass and eventually into the food chain. What process(es) complete the global nitrogen cycle?
What will be an ideal response?