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Lorico [155]
3 years ago
12

Multiple Choice: Please select the best answer and click "submit."

Biology
1 answer:
Lyrx [107]3 years ago
3 0
The correct answer is A
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Which of the following explains why arteries have thicker walls than veins?
Liula [17]

Answer:

c. because arteries carry high pressure blood from the heart

Explanation:

Arteries carry the oxygenated blood that is pumped directly from the left ventricle of the heart. Since they receive blood from the heart, the blood pressure is higher in arteries than veins. To withstand the higher pressure of blood pumped by heart, arteries have thicker walls than the walls of veins.

5 0
3 years ago
If 1000 f2 offspring are obtained, how many flies of each phenotype are expected?
aniked [119]
<span>In Drosophila + indicates wild-type allele for any gene, m is mahogany and e is ebony. Female parents are m+/m+ and males are +e/+e. F1 are m+/+e, all wild type. F1 females are crossed with me/me males - the test cross. Offspring will be : non recombinant m+/me, mahogany wild type or +e/me wild type ebony. OR recombinant me/me mahogany ebony or ++/++ wild type. As the two genes are 25 map units apart, the percentage of recombinants will be 25% and therefore percentage parental types will be 75%. 75% 1000 is 750. There are two parental types, so you would expect 375 of each. Therefore, you would expect 375 m+/me and 375 +e/me. 25% of 1000 is 250 split between two recombinants =125 of each. Therefore you would expect 135 me/me and 125 ++/++</span>
7 0
4 years ago
In what part of sub-saharan africa are the highest rates of hiv/aids found?
notka56 [123]
The southern portion of the region has the highest rates of HIV/Aids.
I hope this helps.
6 0
3 years ago
2. In order for the lagging strand to elongate during DNA replication, it must
devlian [24]

Answer:B) progress towards the replication fork.

Explanation:

Replication fork is a point on the parental DNA where the DNA is being unwound and separated; and the separated strands are being replicated. Synthesis of a new DNA strand occurs in a 5' -> 3' direction, as the DNA strand serving as the template is read from its 3' -> 5' direction. During replication, two strands of DNA are synthesized: The leading strand is synthesized continuously in the same direction as the replication fork movement while the lagging strand is synthesized discontinuously in the direction opposite to the direction of fork movement, that is, towards the replication fork. The lagging strand is synthesized in short fragments known as Okazaki fragments.

3 0
3 years ago
Read 2 more answers
Who was the first person executed in the salem witch trials?.
Paraphin [41]
Bridget Bishop was the first person to be tried, found guilty, and hung on June 10, despite the fact that she was completely innocent. Bridget was well-known across the Salem area for her un-Puritan behavior, which included wearing showy clothing, frequenting taverns, and having many marriages. Trying to avoid being hanged, Bridget confessed her guilt and renounced her good reputation in the community in order to prevent being executed. She was judged guilty by the testimonials of a large number of townspeople (more than any other defendant) and was executed on June 10, 1692, as a result of her conviction.
7 0
2 years ago
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