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gavmur [86]
3 years ago
14

What state best describes natural selection

Biology
1 answer:
baherus [9]3 years ago
8 0

Answer:

Louisianna

Explanation:

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22. A plant geneticist is investigating the inheritance of genes for bitter taste (Su) and explosive rind (e) in watermelon (Cit
mylen [45]

Answer:

See the answer below

Explanation:

Using the formula for calculating Chi square (X^2):

X^2  =  \frac{(O - E)^2}{E} where O = observed frequency and E = expected frequency.

The observed frequencies for the four phenotypes are 88, 62, 62, and 81 respectively.

For the expected frequency, the phenotypes are supposed to assort in 9:3:3:1 according to Mendel ratio.

Hence, expected frequencies are calculated as:

phenotype (1) = 9/16 x 293 = 164.81

phenotype (2) = 3/16 x 293 = 54.94

phenotype (3) = 3/16 x 293 = 54.94

phenotype (4) = 1/16 x 293 = 18.31

The X^2 is calculated thus:

Phenotype            O               E                             X^2

  1                          88            164.81            \frac{(88 - 164.81)^2}{164.81} = 35.80

  2                          62             54.94            \frac{(62 - 54.94)^2}{54.94} = 0.91

  3                           62             54.94              \frac{(62 - 54.94)^2}{54.94} = 0.91

  4                            81              18.31               \frac{(81 - 18.31)^2}{18.31} = 214.64

Total X^2 = 35.80 + 0.91 + 0.91 + 214.64 = 252.26

To the nearest tenth = 252

Degree of freedom = n - 1 = 4- 1 = 3

X^2 tabulated  = 7.815

<em>The calculated </em>X^2<em> exceeds the critical value, hence, the null hypothesis is rejected. The two genes did not assort independently.        </em>

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2 years ago
Because algae undergo ________________________, they produce much of Earth’s atmospheric oxygen.
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B. Photosynthesis is the answer
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3 years ago
What specialized tissue do vasculer plants have that other plants do not
rosijanka [135]

Answer:

You didnt give me and choices so out of the information i have from this answer i can conclude that the answer is out of these 3 Options.

1.) Phyllids 2.) Xylem 3.) Phloem

6 0
3 years ago
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Which is not a way that the increased global temperature will change conditions on Earth?
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I think it's d,possible spread of tropical diseases.

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The parasympathetic division of the somatic nervous system is active when the body is at rest.
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This is true. I hope this helps
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