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Salsk061 [2.6K]
3 years ago
7

Sperm cells require approximately _______ to mature before they are ready for ejaculation.

Biology
1 answer:
AfilCa [17]3 years ago
3 0
250 day I believe so that it may be mature enough
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What is the main function of vascular tissue in vascular plants?
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The vascular tissue conducts water and minerals from the roots upward and throughout the plant<span>, and phloem, which transports dissolved nutrients in all directions within the </span>plant<span>.</span><span> The </span>main<span> conducting vessels of xylem are the tracheids and the vessels.</span>
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3 years ago
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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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3 years ago
Which method of seed dispersal most likely accounts for the solitary coconut palm in the followingscenario?
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it would be c

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Ozone is both helpful and harmful to life on Earth.<br> true or false
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True.

In the upper layers of the atmosphere, it blocks UV radiation from the sun; however, in the lower layers, it is a pollutant. 
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3 years ago
A chemistry student’s height is measured at 68.5 inches. How tall is the student in cm
NemiM [27]

Answer:

173.99 CM

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