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lorasvet [3.4K]
3 years ago
15

From where do the placenta and umbilical cord develop?

Chemistry
2 answers:
Anastasy [175]3 years ago
8 0
It’s either the first or second one

I think it’s the first one - the outer cells of the blastocyst
frozen [14]3 years ago
5 0

Answer:

When an egg is fertilized, it divides into two components — one becomes the embryo, which develops into the fetus, and the other becomes the placenta, which grows along the lining of the uterus. The umbilical cord develops from embryonic tissue and will grow about 60 centimetres long.

The umbilical cord develops from and contains remnants of the yolk sac and allantois. It forms by the fifth week of development, replacing the yolk sac as the source of nutrients for the embryo.

OR put simply

A, the oyster cells of the blastocyst.

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morpeh [17]

Answer:

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    In the late 1500's, Kepler developed a law that explained planetary motion. Kepler's law is so accurate we still use them today.

Explanation:

Can you show me the rest of the question? I can not see it. Also, I know this is multiple choice fill in the blanks so I might be wrong. I hope that this helped though. This took a lot of research. The websites I used are commented down below. |

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3 0
2 years ago
The four sets of lines in the hydrogen emission spectrum are known as Balmer, Brackett, Paschen, and Lyman. For each series, ass
arlik [135]

Answer:

Hydrogen spectrum

Explanation:

Balmer series - Observed in the visible region

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Paschen series - Observed in the infrared region

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8 0
3 years ago
How many electrons are there in the following compound?
Marina86 [1]

Answer:

look it up in google it dead in your face m8 i just did

Explanation:

4 0
3 years ago
Explain why, when the imidazole ring of histidine is protonated, the double-bonded nitrogen is the nitrogen that accepts the pro
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3 years ago
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Lera25 [3.4K]

Answer:

59.30% I

Explanation:

mi respuesta es esa porque es la más sercana

5 0
2 years ago
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