C.electron microscope focus beams light using magnetic beams
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Answer:
Illumination results auxin moving to the dark side of stem tips. As this auxin diffuses down the dark side of the stem, the cells respond by enlarging. This causes the plant to bend toward the light.
Nucleotides are the building blocks of nucleic acids. In DNA, there are four types of nucleotides each containing one of four nitrogenous bases: guanine (G), cytosine (C), adenine (A), thymine (T).
- The monomer exhibited in the figure is a NUCLEOTIDE, i.e., a purine (Adenine) nucleotide.
- A nucleotide is a molecule composed of a nitrogenous base, a pentose sugar (deoxyribose in DNA) and a phosphate group.
- Purine bases consist of a double‐ring structure having four nitrogen (N) atoms and five carbons (C) atoms.
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Answer:
The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun.
