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Xelga [282]
3 years ago
12

The imperial shrimp, Periclimenes imperator, is sometimes seen riding on the back of large sea cucumbers. The shrimp gets to mov

e around to areas with food and expend very little energy, while the sea cucumber is unaffected. What type of relationship is this, and why
Biology
2 answers:
DanielleElmas [232]3 years ago
7 0

Answer:

Commensalism

Explanation:

Commensalism is a form of nutritional relationship between tow living organisms in which one of the organisms (the commensal) benefits and the other is unaffected in any way.

<em>In this case, the shrimp benefit from the sea cucumber by getting its shelter and get moved around while the sea cucumber is not in any way affected.</em>

nydimaria [60]3 years ago
5 0

Commensalism, because one species benefits

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In flies dumpy wings and ebony bodies are each mutations recessive to wild type, and you expect them to behave in a Mendelian fa
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Answer:

See the answers below

Explanation:

Assuming that D (d) represents the allele for wing type and E (e) represents the allele for body type, crossing DdEe with DdEe will yield the following offspring according to the Punnet's square (see the attached image):

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

Phenotype                O                  E                                           X^2

Wild type                 473          9/16 x 830 =  466.875     \frac{(473 - 466.875)^2}{466.875} = 0.08

wild w/ebony b      156          3/16 x 830 = 155.625       \frac{(156 - 155.625)^2}{155.625} =  0.0009

Dumpy w/wild b     149          3/16 x 830 = 155.625      \frac{(149 - 155.625)^2}{155.625} = 0.28

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Total X^2 = 0.3612

Degree of freedom = 4 - 1 = 3

Tabulated value of X^2 (0.05)= 7.815

(c) <em>Since the calculated Chi square value is less than the tabulated value, we conclude that the observed outcome agrees with the expected outcome and that the cross followed the standard Mendelian pattern.</em>

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Explanation:

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