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3 years ago

A student made a model of an onion skin cell she viewed

1 answer:

6 0

If a student made a model of an onion skin cell using a microscopic magnification scale of 500:1 and the length of the modeled cell is 15 cm, the real cell's length would be 0.03 cm.

The scale is 500:1. This means that the dimension of the real cell without being magnified under the microscope would be 1/500.

Thus, if the length of the cell under the microscope is 15 cm. This length has been multiplied by 500. In order to get the real length, it must be divided by 500.

15 x 1/500

= 0.03 cm

More on microscopic magnification can be found here: brainly.com/question/14668612

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A population of wild-flowers was scored for flower color. There were 302 blue (BB) plants, 1857 violet (BR) plants and 811 red (

Paul [167]

Answer:

frequency of the blue (B) allele $= 0.4142$

frequency of the red (R) allele $= 0.5858$

The number of blue plants expected is $509.652$

The number of red plants expected is $1019.304$

The anticipated number of violet plants is $1441.341$

Calculated chi square value

$= 84.5320 + 42.5688 + 119.8692\\= 246.97$

Explanation:

Frequency of blue allele is

Frequency of blue allele is equal to sum of frequency of BB and half of frequency of BR

$\frac{302}{2970} + \frac{1}{2} \frac{1857}{2970} \\= 0.1016 + 0.3126\\= 0.4142$

Frequency of other allele

$1- 0.4142\\= 0.5858$

Chi Square test

See the attached file

The number of blue plants expected is $509.652$

The number of red plants expected is $1019.304$

The anticipated number of violet plants is $1441.341$

Calculated chi square value

$= 84.5320 + 42.5688 + 119.8692\\= 246.97$

7 0

3 years ago

The stomata you view on the surface of the leaves are used in gas exchange and the guard cells regulate this exchange. What do y

beks73 [17]

Answer:

They will collapse and shut off the stomatal pore

Explanation:

The guard cells are regulated by the presence of water. When water is present, they become turgid and open up the stomatal pore and when water is inadequate, they become flaccid, collapse and close up the stomatal pore as a result.

<em>If the leaf is left under the microscope for too long, there will be loss of water by evapotranspiration and the guard cell will become flaccid and collapse as a result and the stomatal pore will become closed.</em>

8 0

4 years ago

A pig that has a curly tail (he is heterozygous for this trait) mates with a pig that has a straight tail. Curly tails are domin

Aleks [24]

Answer:

Curly?

Explanation:

3 0

3 years ago

Read 2 more answers

Please help!! Thanks

Anvisha [2.4K]