The lac operon is an operon required for the transport and metabolism of
lactose in Escherichia coli and many other entric bacteria. It includes
the promoter, regulatory and the operator.
Answer: C. repressor gene
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An individual's major depressive disorder is most likely to be characterized by a constant sense of melancholy or a lack of interest in external stimuli.
<h3>What is depressive disorder?</h3>
Depressive disorder is a mood disorder characterized by persistent sorrow and loss of interest. Clinical depression, often referred to as major depressive disorder, has an impact on your emotions, thoughts, and behavior and can result in a variety of mental and physical problems. You could periodically feel like life isn't worth living and find it difficult to go about your everyday chores.
You can't suddenly "snap out" of depression; it's more complicated than a bout of the blues. Depression could require long-term therapy. However, don't give up. The majority of depressed people experience less severe symptoms thanks to medication, counseling, or both.
To learn more about depressive disorder with the help of given link:
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Answer:
C. Cnidarian tentacles have stinging cells, but Bryozoan tentacles are covered with cilia.
Explanation:
Cnidaria and Bryozoan, both teh phylum are classified under kingdom Animalia that contain aquatic animals found both in freshwater and marine environments.
They both use tentacles for feeding but there is diffference between there tentacles and feeding process.
Cnidarians tentacles are conist of stinging cells in the tips, which are called cnidocytes and a coiled thread-like stinger, called nematocyst. These stinging cells and nematocyst helps to capture and subdue prey. They feed over plankton or animals larger then them.
Bryozoan tentacles are covered with cilia and form an "O" or "U" shaped fold called lophophore, which helps to feed by sweeping the surrounding water. They generally feed on plankton, nudibranchs (sea slugs) and sea spiders.
Hence, the correct option is C.
Answer:
This question is incomplete
Explanation:
Experimentally, when trying to determine the concentration of an unknown sample of CuSO₄ with known absorbance, a standard curve is used. The standard curve is a scattered plot/graph in which known concentrations and there respective/corresponding absorbance are plotted on a "X and Y axis" graph (scattered plot). The absorbance is represented on the y-axis while the concentration is represented on the x-axis.
Once this known values are plotted on the standard curve, an unknown value (either absorbance or concentration) can be extrapolated from the curve. What is missing from the question is data required for the standard curve.
This question shows the absorbance of the CuSO₄ has been determined (most likely using spectrophotometer), the concentration could have been extrapolated from a standard curve.
An example of a standard curve is provided in the attachment for guidance.
