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nikitadnepr [17]
3 years ago
10

NEED HELP ASAP PLEASE WITH #30!!

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

Answer: True

Explanation: Several fresh water species live in water sheds.    

Hope this helps!   :)

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which question would you ask the client to obtain some environmental history of the pet? a. what medications does your pet take
viva [34]

Answer: B

Explanation:

That question lets you know how the pet is living on a daily basis. The other answer choices ask about medical history, but B asks about environment.

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3 years ago
Coach Wood's class is trying determine what factor is most important in the growth of earthworms. Each day, they take the
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D) the earthworm measurement is accurate because moore subtracted the beginning and ending points from the ruler
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what can you do to prevent invasive species from entering texas freshwater ecosystem? mark all that apply
Ede4ka [16]

To prevent the invasive species from entering texas freshwater ecosystem  the following steps should be taken they are described below.

Explanation:

The invasive species are dangerous to natural resources because they destroy the natural resources and ecological system.

These invasive species are controlled by the biological control and mechanical control.

Thus to prevent the invasive species from entering texas freshwater ecosystem the following steps are taken they are

  • Always clean and dry any equipment used in or around lakes or rivers after each use.
  • Spray off your boat after you take it out of the water.
  • Never dump aquarium or pet species into sewer system of waterways.

7 0
3 years ago
Genes A and B are 10 map units apart and genes B and C are 20 map units apart, with gene B located between genes A and C. What w
Marizza181 [45]

Answer:

2% of the progeny will be double crossovers for the trihybrid test cross

Explanation:  

By knowing the positions of genes, we can estimate the distances in MU between them per region.

  • Genes A and B are 10 map units apart (Region I)
  • Genes B and C are 20 map units apart (Region II)
  • Genes A and C are 30 map units apart

----A-------10MU--------B-------------20MU-------------C---

             Region I                      Region II  

We can estimate the recombination frequencies by dividing each distance by 100.

• recombination frequency of A-B region = 10MU / 100 = 0.10

• recombination frequency of B-C region = 20MU / 100 = 0.20

Now that we know the recombination frequencies in each region, we can calculate the expected double recombinant frequency, EDRF, like this:

EDRF = recombination frequency in region I x recombination frequency in region II.

EDRF = 0.10 x 0.20 = 0.02        

2% of the progeny will be double crossovers for the trihybrid test cross

   

7 0
3 years ago
Feedback mechanisms have evolved that maintain homeostasis. Describe how homeostasis is maintained through feedback. In your ans
Mrac [35]
Homeostasis is maintained through feedback because when one certain parameter of your body goes out of the homeostatic bounds, feedback mechanisms will message this back towards the regulatory mechanisms which are responsible for homeostasis maintenance in the first place. Another thing, other than death, which can happen would be a higher bodily temperature for example. 
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