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DiKsa [7]
2 years ago
15

The heart of an embryo starts to pump blood by the ________.

Biology
2 answers:
astra-53 [7]2 years ago
6 0
Emerging from the placenta is the umbilical vein, which carries oxygen-rich blood from the mother to the fetal inferior vena cava via the ductus venosus to the heart that pumps it into fetal circulation.
melamori03 [73]2 years ago
5 0

Answer:

fourth week of pregnancy

Explanation:

Mark me brainly please

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A Tropical Rain Forest biome is normally limited to low altitudes near the equator.
Kay [80]

Answer:

True

Explanation:

Tropical rain forest are one of the important biomes of the world that is characterized by a short or no dry season and a precipitation of overall 60 mm each month. They are also known as lowland equatorial evergreen rainforest. If we talk about location, they mostly are found between  fall between the Tropic of Cancer and the Capricorn since they lie near to equator and they receive sufficient amount of sunshine and rain.

Due to their location near the equators, they receive greater amount of sunshine than other biomes and when sunshine is greater the rate of water evaporation is also greater that results in more rainfall.


Hope it help!

4 0
3 years ago
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Explain what happens to the human body if one of the body systems is not functioning properly.
stiks02 [169]
It depends on the body system

5 0
3 years ago
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Please quick answer without explanation ​
DiKsa [7]

Answer:

The answer is b. Both of them are characterized by selective permeability.

Explanation:

  • Option a. states that both, the nuclear and the cell membrane have two layers. This is only true for the nuclear membrane that consists of two lipid bilayers whereas the plasma membrane only contains one layer.
  • c. Only the nuclear membrane has nuclear pores that connect the two bilayers. The pores act as protein channels or passages that allow transport of materials. The cell membrane does contain channel proteins or transmembrane proteins but not protein channels.
  • d. The nuclear membrane separates nuclear contents from the cytoplasm whereas the cell membrane separates cellular contents from the extracellular environment.
5 0
3 years ago
Kai looks at a photo of herself with her parents. She notices that, while her features are similar to her parents’ features, the
Pavlova-9 [17]

Explanation:

This is because the Genes of the parent that is transferred to Kai and get her parents features .

So, that's why her features are similar to her parents features and they do not appear to be identical .

7 0
3 years ago
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Which 3 elements are found in all organic compounds that living things need?
Strike441 [17]
Hydrogen, oxygen, and nitrogen atoms.
4 0
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