Which of the following is necessary for an atom to participate in the formation of a double covalent bond?

A) The participating atoms must have a full outer shell.
B) There has to be a difference in electronegativity between it and the atom with which it forms the double covalent bond.
C) The participating atoms must be from the same row in the periodic table.
D) The participating atoms must have two or more unpaired electrons.


D) The participating atoms must have two or more unpaired electrons.

Biology & Microbiology

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A. was involved in determining rRNA sequences. B. proposed breaking prokaryotes into two groups. C. proposed breaking eukaryotes into Domains Archaea and Bacteria. D. was involved in refining the Gram stain for classification purposes. E. was involved in determining rRNA sequences AND proposed breaking prokaryotes into two groups.

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The letter “A” in the above figure represents

a. pericycle b. endodermis c. primary xylem d. root cortex e. primary phloem

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During which phase of gamete production do sister chromatids separate?

a. meiosis I b. meiosis II c. fertilization d. mitosis I e. mitosis II

Biology & Microbiology

Define a (molecular) probe and describe its use to identify a specific nucleic acid sequence

What will be an ideal response?

Biology & Microbiology