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krek1111 [17]
3 years ago
11

PLS HELP MEEEE!!!!!!!

Biology
2 answers:
Kobotan [32]3 years ago
6 0
The last one is right
GREYUIT [131]3 years ago
5 0

Answer:

B. Introduced pollutants like fertilizers

Explanation:

The damage from runoff of fertilizers is very significant.

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What are five changes to the planet that are most likely to happen because of the change in global climate?
dem82 [27]

Answer:

increase of greenhouse gases

increased temperature

melting of polar iced caps

raised sea levels

frost free/ growing season will lengthen

more drought and heat waves

increased intensity of hurricanes

heres more-

https://climate.nasa.gov/effects/

8 0
2 years ago
Fossil evidence shows that structures considered vestigial in living organisms...
Bad White [126]
I don't really know but I pick b.have always been vestigial.
4 0
2 years ago
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Which sex chromosome is more dominant ( X or Y ) ?<br><br>​
Tcecarenko [31]

Answer:

x

Explanation:

The X chromosome is significantly longer than the Y chromosome and contains hundreds more genes. Because the additional genes in the X chromosome have no counterpart in the Y chromosome, the X genes are dominant.

hope it helps , pls mark me as brainliest

6 0
2 years ago
Read 2 more answers
In a hypothetical population of 2500 people, 2275 people have brown eyes and 225 people have blue eyes (the homozygous-recessive
aev [14]

Answer:

In the next generation of 4000 children, 1680 of them will be heterozygous for the eye colour.

Explanation:

There's a population of 2500, 2275 of with have brown eyes and 225 blue eyes. <u>Let's call the dominant allele associated with brown colour "B" and the recessive allele associated with blue colour "b"</u>. So the possible genotypes are BB, Bb and bb, being BB and Bb brown eyed individuals and bb blue eyed individuals.

If the population it's in Hardy-Weinberg equilibrium, it means genotypic and allelic frequencies don't change from one generation to the following.

From the information given, we can calculate both allelic and genotypic frequencies.

First, we know that the frequency of the genotype bb it's the amount of blue eyed individuals over the total population.

  • f(bb)=225/2500=0.09

Additionally we know the allelic frequencies can be related to the genotypic ones when the population it's in Hardy-Weinberg equilibrium. Particularly we can say:

  • f(bb)=[f(b)]^2 => f(b)=[f(bb)]^(1/2)= 0.3 <em>(square root of f(bb)).</em>

Also, we can calculate the frequency of the B allele, as the probability of all alleles of the gene sum 1. In other words:

f(b)+f(B)=1 => f(B)=1 - f(b) = 1 - 0.3 = 0.7

So far, we have calculated the allelic frequencies, f(b)=0.3 and f(B)=0.7.

Now we can calculate the genotypic frequencies, using the equations of the Hardy-Weinberg equilibrium.

  • f(bb)=[f(b)]^2 => f(bb)=0.3^2=0.09
  • f(Bb)=2*f(B)*f(b) => f(Bb)=2*0.7*03=0.42
  • f(BB)=[f(B)]^2 => f(BB)=0.7^2=0.49

Finally, knowing that there are 4000 children in the next generation, to know how many of them are expected to be heterozygous for the eye colour, we should multiply the number of children for the probability of being heterozygous for the eye colour (which is the genotypic frequency for the genotype Bb).

  • Nº of heterozygous individuals = f(Bb)*total population= 0.42*4000
  • => Nº of heterozygous individuals =1680

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3 0
3 years ago
The group in an experiment that is not exposed to the tested variable is called the____group
Svet_ta [14]
The answer is the control group.
the group in an experiment that is not exposed to the tested variable is called the control group
7 0
3 years ago
Read 2 more answers
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