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3 years ago

13

Why do birth control pills contain progesterone?

2 answers:

olganol [36]3 years ago

7 0

Answer:

why do birth control pills contain progesterone?

B) Progesterone Kills sperm Cells.

~batmans wife dun dun dun....

DedPeter [7]3 years ago

4 0

<h2>hey</h2>

<h3>Progesterone kills the sperm cells that's why birth control pills contain progesterone.</h3>

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What makes an energy resource non-renewable? <br><br>Please explain well, will give brainliest.

Morgarella [4.7K]

Hey!

What let us know what are non-renewable resources:

Resources which can’t be renewed again after usage , it takes millions of year to form them again
These include fossil fuels
If we go on using fossil fuels it will be empty and we will run out of it.

A energy resource like fossil fuels is an non renewable! But why? Because rate of consumption is more than the rate of formation !

To sustain them , we must adapt to using of Renewable resources like Wind energy, hydro , wind etc .

I hope it’s clear!
Have a good day :)

4 0

2 years ago

How much energy is produced when the sun

adell [148]

Answer:

$E=1.53\times 10^{17}\ J$

Explanation:

We need to find the energy produced when Sun converts 1.7 kg of mass into energy. Einstein's mass energy relation is given by :

$E=mc^2$

c is speed of light

$E=1.7\times (3\times 10^8)^2\\\\E=1.53\times 10^{17}\ J$

So, energy produced is $1.53\times 10^{17}\ J$ .

7 0

3 years ago

To test your hypothesis, the same fertilizer from the farm will be mixed into the water of one aquarium (experimental) and the o

lisov135 [29]

Answer:

One significant difference that I noticed was the color of the water. In the control aquarium, the color of the water at 30 days was the same as it was on the 1st day. In the experimental aquarium, the water had a green tint on the 30th day, but on the first day it was clear.

4 0

2 years ago

Which of the following is not a concern about nuclear energy?

o-na [289]

Nuclear energy produces less carbon than fossil fuels

4 0

2 years ago

14). During the early 1700’s, a small group of pacifist Protestants fled Germany to avoid religious persecution. This group, the

abruzzese [7]

A) In the Dunker population, the frequency of IB allele is 0.3 and the frequency of i allele is 0.4. In the general population, the frequency of IB allele is 0.1 and t<span>he frequency of i allele is 0.5.
</span>
If:
$I^{A}$ - <span>the frequency of IA allele
</span> $I^{B}$ - <span>the frequency of IB allele
</span> $i$ - t<span>he frequency of i allele

Then:
</span> $I^{A} I^{A}$ + <span> $I^{A} i$ - the frequency of individuals with A blood type
</span> $I^{B} I^{B}$ + <span> $I^{B} i$ - the frequency of individuals with B blood type
</span> $ii$ <span>- the frequency of individuals with O blood type
</span>
Let's first take a look on the Dunker population:
$I^{A} = 0.3$
$ii=0.16
$

<span>Since there is only one possible genotype for O individuals - ii - the frequency of the allele i is square root of the frequency of O individuals:
</span> $i= \sqrt{ii}$
⇒ $i = \sqrt{0.16}$
⇒ $i=0.4$

Now, we have the frequencies of two alleles ( $I^{A}$ and $i$ ). To calculate the frequency of $I^{B}$ <span> allele, we will use the formula:
</span> $I^{A} + I^{B} + i = 1$
⇒ $I^{B} = 1- I^{A} - i$
⇒ $I^{B} = 1-0.3-0.4$
⇒ $I^{B} = 0.3$

Now, in the general population:
$I^{A} = 0.4$
$ii=0.25$

<span>Similarly to the work for the Dunker population:
</span> $i= \sqrt{ii}$
⇒ $i = \sqrt{0.25}$
⇒ $i=0.5$

$I^{A} + I^{B} + i = 1$
⇒ $I^{B} = 1- I^{A} - i$
⇒ $I^{B} = 1-0.4-0.5$
<span>⇒ $I^{B} = 0.1$
</span>

b) A founder effect is a result of geographical separation of a few individuals from the original population. Those founding individuals will form a new population. The Dunker population was not only geographically separated, but also genetically. The group interbreeding was present resulting in increasing those allele frequencies that were the most common in the founding population. In this case, the most individuals from the founding population had B blood type.

6 0

3 years ago