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BARSIC [14]
3 years ago
9

Many animals respond to periodic changes with __________________ cycles of behavior

Biology
1 answer:
Usimov [2.4K]3 years ago
4 0
12 is the answer my good sir
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Before a cell divides, it makes a copy of its genes during
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Bedford a cell divides, it makes a copy of its genes during interphase

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Which of these chemicals is definitely inorganic?
dexar [7]
<span>One that is made of nitrogen and hydrogen is definitely inorganic. Inorganic has these molecules in them.</span>
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3 years ago
In sickle-cell disease, as a result of a single amino acid change, the mutant hemoglobin tetramers associate with each other and
gogolik [260]

Answer:

The correct answer is - altered primary and quaternary structure; secondary and  tertiary structure may or may not be altered.

Explanation:

a) Primary structure: It is fundamentally the amino acid sequence or arrangments. Every protein has a remarkable amino acid sequence and little change in these sequence modifies the primary structure. On account of sickle cell, the amino corrosive has changed, and henceforth the essential structure of the protein molecule changes.  

b). secondary structure: It is the folding of the primary structure chain, which results from intermolecular and intramolecular hydrogen holding of the amide group. Ex; Alpha helix and beta sheets. In the above case, this may or might not have changed as there is no conclusive method to know this.  

c) Tertiary structure: Most proteins' tertiary structures are mixes of a-helices, b sheets, and circles and turns. Every protein has interesting three-dimensional structure, folded in a particular way now and then known as a domain. For our situation, since it depends on the optional structure, it might have changed.

d) Quaternary structure: It is the relationship of numerous individual protein chains into a solitary protein with various subunits. The subunits arrangment offers to ascend to a steady structure. For our situation, a hemoglobin tetramers partner with one another and gather into large fibers. This has changed the first structure and accordingly we state the quaternary structure has changed.

4 0
3 years ago
two springs with constants k1 and k2 are in a series Using the fact that force balance must apply everywhere, what is the equiva
aivan3 [116]

Explanation:

Let the spring constant of two springs are k₁ and k₂. In series combination of springs, the equivalent of springs is given by :

k_{eff}=\dfrac{1}{\dfrac{1}{k_1}+\dfrac{1}{k_2}}

So, if it is required to swap out a single spring for the two springs that are in series, the spring constant need to be to generate the same force at any displacement is,

\dfrac{1}{\dfrac{1}{k_1}+\dfrac{1}{k_2}}

Hence, this is the required solution.

7 0
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Which of the following makes up the largest portion of the hydrosphere? A. air B. the oceans C. the continents D. photosynthetic
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The answer would be the Oceans because water makes up a very large portion of the earth in general.

Hope this helps!!


4 0
3 years ago
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