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Veseljchak [2.6K]
3 years ago
15

Which has higher salinity oceans or lakes?

Biology
1 answer:
Nana76 [90]3 years ago
7 0
Lakes have higher salinity than Oceans, I hope this helped. Enjoy The Rest Of Your Day!
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1. What are the principles of population growth?<br><br> 2. What are the limits of the environment?
Tju [1.3M]

Answer:

1- Malthus's principle of population is basically the law of supply and demand applied to the relationships between food production and population growth, which he makes clear time and again throughout the Essay. As the food supply increases, food becomes cheaper, and more children are brought into the world

2- Environmental limits can be defined as the point beyond which the environment exceeds its ability to provide essential resources. For example, the steadily increasing world population presents a growing demand for goods, services, living space and farmland.

Explanation:

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2 years ago
Why do unsaturated fatty acids form liquid oils instead of solids?
vaieri [72.5K]

Answer:

Generally, the unsaturations of the fatty acids are of the cis type. This causes the arrangement of the molecule to be angled, with the apex at unsaturation. This angulation causes the melting points of unsaturated acids to be lower than those of their saturated counterparts and therefore are liquid at room temperature. Double bonds in trans distort little crystalline symmetry, which is very similar to that of saturated fatty acids.

Explanation:

They are long chain carboxylic acids, usually have no carbon pair (14 to 22), the most abundant have 16 and 18 carbons.

Fatty acids are saturated when they do not have double bonds, they are flexible and solid at room temperature.

Unsaturated or polyunsaturated if there are double or triple bonds in the chain, rigid at the level of the double bond being oily liquids.

Physical properties

- Solubility. They are bipolar or amphipathic molecules (from the Greek amphi, double). The head of the molecule is polar or ionic and therefore hydrophilic (-COOH). The chain is apolar or hydrophobic (-CH2- and -CH3 terminal groups).

- Melting point. In saturates, the melting point increases due to the number of carbons, showing a tendency to establish Van der Waals links between the carbonated chains.  Unsaturates have fewer interactions of this type due to the elbow of their chain.

8 0
3 years ago
How does water's temperature affect the amount of oxygen in it
Rus_ich [418]

Answer:

<u>Oxygen levels decrease when water is warmer, and when its cooler, it increases. So, vise versa.</u>

:))

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3 years ago
Molecule 1 has the nitrogenous base sequence TCAAGT. Which set of bases in Molecule 2 can bond to that sequence in a complementa
MissTica
A bonds to T and C bonds to G so it would be AGTTCA
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3 years ago
Read 2 more answers
What is the difference between the null and alternative hypotheses? Give an example of each. How would you support or fail to su
Gekata [30.6K]

Answer:

Null Hypothesis:

The null hypothesis reflects that there will be no observed effect in our experiment. In a mathematical formulation of the null hypothesis, there will typically be an equal sign. This hypothesis is denoted by H0.

The null hypothesis is what we attempt to find evidence against in our hypothesis test. We hope to obtain a small enough p-value that it is lower than our level of significance alpha and we are justified in rejecting the null hypothesis. If our p-value is greater than alpha, then we fail to reject the null hypothesis.

If the null hypothesis is not rejected, then we must be careful to say what this means. The thinking on this is similar to a legal verdict. Just because a person has been declared "not guilty", it does not mean that he is innocent. In the same way, just because we failed to reject a null hypothesis it does not mean that the statement is true.

For example, we may want to investigate the claim that despite what convention has told us, the mean adult body temperature is not the accepted value of 98.6 degrees Fahrenheit. The null hypothesis for an experiment to investigate this is “The mean adult body temperature for healthy individuals is 98.6 degrees Fahrenheit.” If we fail to reject the null hypothesis, then our working hypothesis remains that the average adult who is healthy has a temperature of 98.6 degrees. We do not prove that this is true.

If we are studying a new treatment, the null hypothesis is that our treatment will not change our subjects in any meaningful way. In other words, the treatment will not produce any effect in our subjects.

Alternative Hypothesis:

The alternative or experimental hypothesis reflects that there will be an observed effect for our experiment. In a mathematical formulation of the alternative hypothesis, there will typically be an inequality, or not equal to symbol. This hypothesis is denoted by either Ha or by H1.

The alternative hypothesis is what we are attempting to demonstrate in an indirect way by the use of our hypothesis test. If the null hypothesis is rejected, then we accept the alternative hypothesis. If the null hypothesis is not rejected, then we do not accept the alternative hypothesis. Going back to the above example of mean human body temperature, the alternative hypothesis is “The average adult human body temperature is not 98.6 degrees Fahrenheit.”

If we are studying a new treatment, then the alternative hypothesis is that our treatment does, in fact, change our subjects in a meaningful and measurable way.

Hope this helps!

Explanation:

3 0
3 years ago
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