During a controlled experiment, a scientist will isolate and test (D) a single variable. A conclusion, nor a mass of information can be isolated or tested. A control group is the group that would receive a placebo, so testing that would be futile.
Answer:
A. Estradiol
Explanation:
Estradiol, which is also referred to as 17 beta-estradiol, is an estrogen steroid hormone. This form of estrogen is one of the major female sex hormone that plays major role in the female reproductive system such as regulation of the estrous and menstrual cycle. It also helps in regulating body metabolism.
Reduction in the level of Estradiol is one of the problems common in women approaching menopause. Optimal level of estradiol in the body helps improve fertility in the body as symptoms such as such as vaginal dryness, burning, itching that are associated with menopause are reduced to the barest minimum.
The supplement taken by Priya in order to thin the mucus and allow sperm to get through the mucus to the uterus most likely works to benefit the body by increasing <em>estradiol.</em>
Answer:
If a DNA strand has the base sequence TTCCGGAA the complementary strand has the sequence AAGGCCTT.
Explanation:
A DNA molecule is constructed from sequences of its four nitrogenous bases: adenine, thymine, guanine and cytosine. Since DNA is made up of two strands, the sequence of nitrogenous bases of one strand is complementary to the other
.
The complementarity of the bases is a characteristic of the nitrogenous bases in the nucleic acids to combine with their complementary base, which is the same as saying that purines complement with pyramidines.
- <em>Adenine is combined with Thymine A=T
</em>
- <em>Cytosine is complemented with Guanina C≡G
</em>
In this way, given a sequence on a DNA strand
:
<em> T-T-C-C-G-G-A-A</em>
The complementary strand will have this sequence:
<em> A-A-G-G-C-C-T-T</em>
<span>C.) areas where the Rob has a reversed polarity
Hope this helps. c:</span>
