<span>The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.</span>
Answer:
The rows on the periodic table are called periods. All the elements in a period have valence electrons in the same shell. The number of valence electrons increases from left to right in the period. When the shell is full, a new row is started and the process repeats.
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I hope it helps plz let me know if it is right or wrong.</h2>
Answer:
Option (C).
Explanation:
The lac operon may be defined as the group of genes that are involved in the lactose metabolism of the <em>E.coli</em> bacteria. François Jacob and Jacques Monod was the first scientists to explain the mechanism of Lac operon.
The production of large amount of beta-galactosidase by the cells, the lactose level will decrease. This causes the elevation of the glucose level in the E.coli bacteria.
Thus, the correct answer is option (c).