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Vera_Pavlovna [14]
3 years ago
11

State the characteristic of tracheoles that help with gaseous exchangein insects.​

Biology
1 answer:
Taya2010 [7]3 years ago
7 0

Answer:

  1. made up of a single epithelium layer to allow diffusion of gases.
  2. terminal ends of fine tracheoles are filled with a fluid in which gases dissolve and therefore transported in solution form
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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
How should you change this image to represent an ionic bond between sodium and fluorine?
erma4kov [3.2K]
This is kind of hard to show without the picture, but to make an ionic bond with Na and Fl you would have the sodium move an electron to the fluorine, so the answer is C!  This is because of the fact that sodium has an outer shell valance electron (so it's unstable) and the fluorine would accept that because it is missing an electron in the outer shell.  So this sharing would lead to the bond being created!
5 0
2 years ago
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Do only plant cells have mitochondria?
Oduvanchick [21]
Yes plant cells do have mitochondira

3 0
3 years ago
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15. DNA that is derived from the DNA of two or more different species is called —
Wewaii [24]

Answer:

A

Explanation:

recombinant DNA ,the DNA derived from more than 2 or more DNA

6 0
3 years ago
When a lunar eclipse happens, which would we not see: the sun or the moon?
Nookie1986 [14]

Answer:

the sun

Explanation:

The typical lunar eclipse happens when the Sun, Earth and moon are all aligned 180 degrees apart from each other in the sky. When this happens, the Earth casts a shadow onto the moon, so the Sun should not be visible at all if you can still see the moon.

7 0
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