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Arte-miy333 [17]
3 years ago
11

The major body structures and organ systems form during which trimester

Biology
1 answer:
aivan3 [116]3 years ago
6 0
Women's First trimester 
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How do gymnosperm seeds differ from angiosperm seeds? Provide an example for both.
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Gymnosperms do not have fruits or flowers and have an unenclosed or naked seeds on the surface of scales or leaves while Angiosperms have seeds that are enclosed within an ovary which is usually a fruit.
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A group of six students has taken samples of their own cheek cells, purified the DNA, and used a restriction enzyme known to cut
prohojiy [21]

Answer:

D. The two students who have two fragments have one restriction site in this region.

Explanation:

The DNA samples from the cheek cells were subjected to digestion with a restriction enzyme. This enzyme is an endonuclease and cuts the DNA at a specific sequence only. This sequence is called a restriction site. If the restriction site is not present in the sample DNA, the restriction enzyme cannot cut it. The presence of one restriction site in the sample DNA would cut it into two DNA fragments.

Similarly, the presence of two restriction sites in each DNA molecule would obtain a total of three DNA fragments per DNA molecule.

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When _______________ and _________________ were combined together there were a lot of bubbles that were produced and the mass we
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Vinegar, baking soda, down, gas

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2 years ago
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Sister chromatids present during mitosis are
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Answer:

The correct answer is e. All of the above.

Explanation:

Sister chromatids are made during the synthesis phase of the cell cycle. In the synthesis phase, the homologous chromosomes get replicated and sister chromatids are produced so they are produced by duplication of chromosomes.  

As sister chromatids are produced by replication, therefore, they are identical copies of parent chromosomes. These sister chromatids are joined to each other at centromere. They get separated during the anaphase of mitosis and moves to the opposite pole.

Therefore the right answer is e.

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3 years ago
In fetal circulation, the __________ bypasses the liver and the __________ bypasses the lungs. ligamentum venosum; ligamentum ar
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In fetal circulation, the ductus venosus bypasses the liver and the ductus arteriousus bypasses the lungs. Ductus arteriosus also called ductus botalli is a blood vessel connecting the main pulmonary artery to the  proximal ascending aorta. It does allow most of the blood from right ventricle to bypass the fetus's fluid-filled non-functioning lungs. Ductus venosus on the hand allows oxygenated blood from the placenta to bypass the liver. 
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