Diffusion is important because:
<span>a) the human cell can obtain nutrients and gases </span>
<span>b) excrete metabolic wastes </span>
<span>c) maintain a suitable pH and ionic concentration within the cell for enzyme activity. </span>
Answer:
Reasons for failure to continue to use contraception include the following: for some, the risk of producing an unwanted pregnancy adds flavor to the sexual act; some women rationalize their sexual activity, and this usually leads to discontinuation of contraceptive use; failure to change the contraceptive when needs
Explanation:
The DNA molecule is composed of two strands with the help of hydrogen bonds which is doubl helix <span> At each end of the double helix, one strand is 5' and the other is 3'.the two strands are anti parallel so the correct option is
</span> They are oriented in opposite directions
<span>b)
The 99% Confidence Interval is:
</span><span>x¯</span>−<span>z<span>(1−c)/2</span></span>×<span>σ/√n</span>≤<span>x¯</span>≤<span>x¯</span>+<span>z<span>(1−c)/2</span></span>×<span>σ/<span>√n
</span></span>3.2−2.576<span>18.6/√48</span>≤3.2≤3.2+2.57618.6/√48
−3.72≤3.2≤<span>10.12
</span>Since 0 is included in this interval, these results suggest that a difference of 3.2 could have resulted from mere random variation.
<span>z<span>(1−0.99)/2</span></span><span> was determined using this calculator.
</span>
<span> Note that we divided (1-.99) by 2 because we are interested in the two-tailed confidence interval.
We can validate our results using the confidence interval for mean calculator</span>
Answer:
Option (c).
Explanation:
The kin selection was first used by the Hamilton's and explains how this selection increases the frequency among the recipient and the actor and also explain the genetic relatedness among the family members.
The Hamilton's rule depends on the genetic relatedness r and the benefits obtained by the action to the recipient and the energy or cost used during the action. The selection is positive if the product of genetic relatedness and benefits is more than the cost.
Thus, the correct answer is option (c).
