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dexar [7]
3 years ago
11

Why do a chicken embryo and a cow embryo look very similar even though the adults do not

Biology
2 answers:
masya89 [10]3 years ago
5 0
The answer is : They are distantly related so their development is similar. They have different genetic materials.
8090 [49]3 years ago
4 0

Answer:

Embryonic development is the initial stage in organism's  life. Many animal and birds species shows similar embryonic growth. This indicates that they are evolved from a common ancestor. Differences in features and structures in adulthood is because of genetic information present in the embryo and the process of subsequent adaptations for the purpose of evolution.

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3 years ago
Help me on number 7 please and thank you.
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You are conducting a case control study to determine if an association exists between melanoma and indoor tanning. From a statew
Aleksandr-060686 [28]

Answer:

a. Odds ratio = 1.58

b.  Inasmuch the odds ratio is greater than 1, this means that higher odds of melanoma exist in people exposed to indoor tanning, than in those not exposed to indoor tanning

Explanation:

For case  study                                                  

Let 'a'  represent the total population of people with melanomia = 696                                                      

Let 'b' represent the total number of people with melanomia exposed to indoor tanning  =  1107 – 696 = 411 people

For  control study

Let 'c' represent the total population = 1500

Let 'd' represent the total number of people not exposed to indoor tanning = 1500 - (0.428 * 1500)

                                                          =  1500 - 723

Total number of people not exposed to indoor tanning   = 777 people

                                                       

a. Odds ratio = (a/b) / (d/c) = (696/411) / (777/723)

                                                = 1.69 / 1.07 = 1.58

b. Inasmuch the odds ratio is greater than 1, this means that higher odds of melanoma exist in people exposed to indoor tanning, than in those not exposed to indoor tanning.

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8 0
3 years ago
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