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balandron [24]
3 years ago
10

How many chromosomes are found in the organism that results from the union of a human sperm cell and an egg cell?

Biology
1 answer:
Liono4ka [1.6K]3 years ago
5 0
A human has a total of 46 chromosomes (23 from daddy and 23 from mommy). :)
A sperm cell has 23 chromosomes and an egg cell that has 23 chromosomes. 23 + 23 equals 46. Sometimes (due to mutations), a person
may have less chromosomes than they need. This may cause some problems like Turner syndrome(treatment can help aid the situation but, it can't be cured).
Hope this helps you :)

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B.  0 N

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Two insecticides will be compared for their effectiveness in eliminating aphids on tomato plants. Forty tomato plants of the Big
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Answer:

The t-test

Explanation:

<em>The researcher should use a t-test to compare the two means and check if they are significantly different from each other.</em>

In using the t-test, both null (H0) and alternate (H1) hypothesis are made such that:

  • H0: n1 = n2
  • H1: n1≠ n2

Thereafter, the value of t is calculated and compared to its critical value on the table. The formula for calculating the t goes thus:

t = \frac{Y_1 - Y_2}{\sqrt{\frac{S_1}{n_1} + \frac{S_2}{n_2}  } }

where, Y1 = mean of population 1, Y2 = mean of population 2, S1 = variance of population 1, S2 = variance of population 2, n1 = number of individuals in population 1 and s2 = number of individuals in population 2.

<em>At the end of the day, if the calculated t value is more than the critical value of t, the H0 is rejected and it shows that the two means are significantly different. Otherwise, the H0 is accepted and this shows that there is not significant difference between the mean of population 1 and that of 2.</em>

7 0
3 years ago
Does Oxygen have a cation or anion?
yaroslaw [1]

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I think its anion

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FRAP has revealed that some proteins move in cell membranes much slower than they move in reconstituted liposomes. Which of the
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e. All could limit protein mobility

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Which of the following is NOT true regarding the sounds associated with the heart? Select one: a. The "lub-dub" sound originates
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B) The "lub-dub" sound originates from blood turbulence through the heart.

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The systole and diastole in the heart produce the lub and dub sound in the heart.

The systole represents the contraction of both left and right ventricles and pumps the blood to the body and the right ventricle to the lungs. This involves the opening and closing of the valves. The closing of the atrioventricular valves produces lub sound.

At the end of the systole or ventricular contraction or when the blood has been pumped to the aorta and the pulmonary valves then the semilunar valves present in the aorta and pulmonary closes. This produces a sound dub.

Therefore,lub dub is associated with the physical contraction of the heart but not the turbulence of the blood.

Thus, the selected option is the correct answer.

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