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e-lub [12.9K]
3 years ago
6

PLEASE HELP ME ITS DUE TODAY PLEASE YOU DONT HAVE TO AWNSER THEM ALL

Biology
1 answer:
dybincka [34]3 years ago
7 0

Answer:

1 = A

2 = B

3 =  B

Explanation:

1) Black holes occur when really big stars collapse on themselves. And, in order to get big, the star has to be an old one.

2) A black hole is something huge that swallows up everything, while a protostar is just the very beginning of a star.

3) Scientist can't truly know for sure, but they can infer about them due to the effects of the surrounding areas.

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Ways in which eutrophication can be reduced in waterways?
AveGali [126]

when excess fertilizers wash off of the nearby farms and into the lake, they become food for the algal blooms that can plague the lake in the summer. So, reducing fertilizer use and preventing runoff directly into the lake would be one way of reducing eutrophication.

4 0
3 years ago
A plant has the genotype AAbbCcDDEeff, where each letter represents a different gene. This plant is crossed with another whose g
scoundrel [369]

Answer:

The fraction of the offspring that will show the phenotype produced by the recessive c allele is 1024/4096 = 0.25 A-BbccDdE-Ff = 25%

Explanation:

You can calculate the fraction of the offspring that will show the phenotype produced by the recessive c allele by making the punnet square for each gene and then multipling the phenotypic proportions, like this:

Cross) AAbbCcDDEeff     x      AaBBCcddEEFF

Cross For each gene by separately:

  • Parental )        AA    x    Aa

       Gametes)  A    A         A    a

        F1)             2/4 AA  

                          2/4 Aa

  • Parental )        bb    x    BB

         Gametes)  b    b         B   b

          F1)                   4/4 Bb

  • Parental )        Cc    x    Cc

        Gametes)  C    c         C    c

         F1)             1/4 CC

                           2/4 Cc

                            1/4 cc

  • Parental )        DD    x    dd

       Gametes)  D    D          d    d

        F1)             4/4 Dd

  • Parental )        Ee    x    EE

        Gametes)     E     e      E     E

         F1)             2/4 Ee

                           2/4 EE

  • Parental )        ff    x    FF

         Gametes)     f     f      F     F

          F1)             4/4 Ff

So, fraction of the offspring that will show the phenotype produced by the recessive c allele is:

4/4 A-  x  4/4 Bb   x   1/4 cc   x   4/4 Dd   x  4/4 E-   x   4/4 Ff =  

1024/4096 = 0.25 A-BbccDdE-Ff =25%  

6 0
3 years ago
Read 2 more answers
Discuss 2 ways in which efforts to protect species can lead to controversy
Crazy boy [7]

Protection of certain species is a very controversial topic. Many species like the mountain lion or jaguar that are near extinction in certain areas, are threats to human life. Another reason is that they could off set the food chain when they come back and be stonger than ever. For example the mountian lion could eat out the thriving white tail deer population which was struggling because of the mountain lion. And many people rely on white tail deer for food.

Hope this helped :)

8 0
3 years ago
What can scientists look at to help them prove that our modern-day animals evolved from extinct animals?
Dmitriy789 [7]

Answer:

Their skeletal structure and possibly how they look but usually not. You can also look at the way they live and the biomes they live in.

Explanation:

8 0
2 years ago
Study the structure of the plant growing on the rock in the image. Based on its structure, to which group does the plant belong?
dusya [7]

The plants can be classified based on their vascular and reproductive structures. The plant given in the image belongs to the Bryophyta.

<h3>What is Bryophyta?</h3>

The non-vascular plants that are a part of the plant classification are found in moist places and are small in size belongs to the Bryophyta.

The plant of this classification have a leafy multicelled plant body, that lacks true leaves, roots, and stems.  They are green plants and also contains chloroplast for food synthesis.

The vascular tissue like xylem and phloem are completely absent and hence the transportation does not occur through specialized systems.

Therefore, option A. Bryophyta is the plant growing on the rock.

Learn more about Bryophyta here:

brainly.com/question/1435423

5 0
2 years ago
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