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Liula [17]
3 years ago
9

A continental rift is a zone where

Biology
2 answers:
BlackZzzverrR [31]3 years ago
3 0
The answer is A. A continental rift zone is where the plates pull away from each other.

Elanso [62]3 years ago
3 0

Answer:

Divergent plate margins develop within a continent.

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>

4 0
3 years ago
Follicle stimulating hormone (FSH) is secreted by which gland?
iragen [17]

secreted by the gonadotropic cells of the anterior pituitary gland, and regulates the development, growth, pubertal maturation, and reproductive processes of the body

8 0
3 years ago
Tissue working together makes an-<br> A. Organism<br><br> B. Organ
lara [203]

Answer:

<u>B. Organ</u>

Explanation:

Atom → Cell → Tissue → Organ → Organ System → Organism

3 0
3 years ago
Read 2 more answers
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
HACTEHA [7]

Mesozoic, the era contained both large reptiles and small birds/mammals. It's interesting, coming from an evolutionary biology.

Hope this helped!

4 0
3 years ago
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How does the transfer of energy change over time
Nikitich [7]

Answer: It just does.

Explanation: Over time the transfer of energy changes over time because of different things.

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3 years ago
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