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just olya [345]
2 years ago
9

Which are steps of mitosis? Select 4 options.

Biology
1 answer:
-Dominant- [34]2 years ago
5 0

Answer:

Mitosis occurs in four phases: 1) prophase, 2) metaphase, 3) anaphase, and 4) telophase.

An easy way to remember this is with the acronym P.M.A.T. - Please Make A Treat.

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The flow of energy in an ecosystem is best
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The flow of energy in an ecosystem is best described as energy moving in one direction from the sun to the producers then to the consumers. 

Explanation; 
Energy flow is the amount of energy that moves through successive trophic levels of a food chain in an ecosystem. Ecosystem maintain themselves by cycling energy and nutrients.
The energy from sunlight is taken up by producers which use it to produce organic compounds through photosynthesis. The energy is then passed successively to the trophic levels, that is from the producers to the consumers ( primary, secondary, tertiary and quotienary consumers). During this transfer some energy is lost at each trophic level in form of heat. 
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3 years ago
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I really really really need help, please. Middle school science:
shtirl [24]

Answer:

c

Explanation:

6 0
2 years ago
Two independently segregating genes determine kernel color in wheat. Red color results from at least one dominant allele in both
Lera25 [3.4K]

Answer:

a) The expected phenotype of the F1 plants is 100% RrBb, red kernels.

b) The expected phenotypic classes in the F2 are: 9:3:3:1

   9/16 R-B-, 3/16 rrB-, 3/16 R-bb,  1/16 rrbb

   Proportions 9:6:1.

9/16 Red kernel (R-B-), 6/16 Brown kernel (rrB- + R-bb), 1/16 White kernel (rrbb)    

Explanation:

<u>Available data:</u>

  • red kernel: R-B-
  • brown kernel: R-bb or rrB-
  • white kernel: rrbb

1º Cross)  RRBB      x      rrbb

F1)             100% RrBb (red kernels)

2ºCross)   RrBb       x       RrBb

Gametes)  RB                   RB

                  Rb                   Rb

                  rB                    rB

                  rb                    rb

Punnet Square)      RB           Rb         rB         rb

                 RB      RRBB      RRBb     RrBB     RrBb

                 Rb      RRBb      RRbb     RrBB     Rrbb

                 rB       RrBB       RrBb      rrBB      rrBb

                 rb       RrBb       Rrbb       rrBb     rrbb

F2)  Phenotypic classes:

       <em>9/16 R-B-</em>

<em>        3/16 rrB-</em>

<em>        3/16 R-bb</em>

<em>        1/16 rrbb</em>

      Phenotypic proportions:

      <em>9/16 Red kernel (R-B-)</em>

<em>       6/16 Brown kernel (rrB- + R-bb)</em>

<em>       1/16 White kernel (rrbb)         </em>                      

7 0
3 years ago
PLEASE HELP ME OMG
katrin2010 [14]

They are not aware of each other because usually they are sesperate and don't live together.

3 0
3 years ago
The __________ is a pear-shaped organ that houses the embryo or fetus during its development.
Nookie1986 [14]
The answer is the womb
6 0
3 years ago
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