What two processes results in genetically-different products?
a)mitosis and meiosis
b)mitosis and asexual reproduction
c)meiosis and asexual reproduction
d)meiosis and sexual reproduction
e)mitosis and sexual reproduction
d)meiosis and sexual reproduction
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32P-end-labeled DNA fragment contains the AP-1–binding site sequence
The DNA was mixed with Fos, FosC (a fragment of Fos), or Jun (all of which would form a homodimer), or with a mixture of Fos and Jun or a mixture of FosC and Jun (both of which would form the two types of homodimer and the heterodimer). Reactions were analyzed by polyacrylamide gel electrophoresis, thenautoradiography. The results are shown in Figure 1. This technique is called: A. DNA footprinting. B. electrophoretic mobility shift assay. C. reporter gene assay. D. immunoprecipitation.
When placed in an aqueous solution, amphipathic molecules will orient themselves with
A. hydrophobic hydrocarbon chains facing the water and hydrophilic head groups in the middle. B. hydrophilic hydrocarbon chains facing the water and hydrophobic head groups in the middle. C. hydrophilic hydrocarbon chains in the middle and hydrophobic head groups facing the water. D. hydrophobic hydrocarbon chains in the middle and hydrophilic head groups facing the water.
Where are the largest reserves of carbon on the planet?
A. soil and rocks B. plants, algae, and cyanobacteria C. rocks and fossil fuels D. volcanoes and hot springs E. the oceans
Which of the following is the most plausible explanation for these findings?
(A) A cell surface protein on cell 4 signals cell 3 to induce formation of the worm's intestine. (B) The plasma membrane of cell 4 interacts with the plasma membrane of the posterior portion of cell 3, causing invaginations that become microvilli. (C) Cell 3 passes an electrical signal to cell 4, which induces differentiation in cell 4. (D) Cell 4 transfers genetic material to cell 3, which directs the development of intestinal cells.