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3 years ago

PLEASE HELP!!!!!! THANK YOU SO MUCH IN ADVANCE. I will give brainliest if and/or when it gives me the choice.

Biology

1 answer:

Kisachek [45]3 years ago

7 0

Answer:

Explanation:

Walter B. Cannon coined the term to describe the process of maintaining the internal environment in a relatively constant condition.

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Which best describes when the body is working on counteracting an effect? when hormone levels in the body are all equal during a

spayn [35]

Answer:

The answer is a negative feedback loop. Negative feedback is used to counteract an effect and achieve back a homeostatic balance. An example of a negative feedback loop is in thermoregulation. When temperatures are too high, the hypothalamus induces body responses such as vasodilation and sweating that enable the loss of excess heat.

Explanation:

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3 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 the frequency of i allele is 0.5.

If:
$I^{A}$ - the frequency of IA allele
 $I^{B}$ - the frequency of IB allele
 $i$ - the frequency of i allele

Then:
 $I^{A} I^{A}$ + $I^{A} i$ - the frequency of individuals with A blood type
 $I^{B} I^{B}$ + $I^{B} i$ - the frequency of individuals with B blood type
 $ii$ - the frequency of individuals with O blood type

Let's first take a look on the Dunker population:
$I^{A} = 0.3$
$ii=0.16
$

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:
 $i= \sqrt{ii}$
⇒ $i = \sqrt{0.16}$
⇒ $i=0.4$

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

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

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

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


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.

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3 years ago

Serous membrane is what type? Epithelial or connective?

Colt1911 [192]

A serous membrane contains both epithelial and connective tissue

8 0

2 years ago

Read 2 more answers

Cine poate completa aici in manualul de biologie cl IVDupă activitatea în decursul celor 24 de ore, deosebim organisme … şi … .

erastovalidia [21]

Explanation:

The animals that remain active during the day are called the diurnal while animals that remain active during night are called the nocturnal.

As per the question we can distinguish organisms and plants and see their behavior during the day as well as during night. Diurnal are organisms that activate during the day, while the organisms that activate during the night are called the nocturnal. Among the animals, nocturnal animals are bats, mouse, hedgehog, etc. The appearance of the nocturnal animals is due to the following three factors :

-- to avoid heat

-- to hunt

-- to mate

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3 years ago

Helpppppp thank you any help will do

madam [21]

Answer: B

Explanation:

3 0

3 years ago