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gregori [183]
3 years ago
13

How placenta is design to provide nutrition to developing embroy

Biology
1 answer:
BartSMP [9]3 years ago
5 0
The placenta is the interface between the maternal and embryo's blood, and allows for the exchange of nutrients, including oxygen and carbon dioxide exchange, but prevents certain drugs and chemicals from reaching the embryo. Its a bit like a security guard that only lets certain things though to the baby.
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PLEASE HELP is this right?? its timed and i put biosphere last time and got it wrong
jolli1 [7]

Answer:

its population.

Explanation:

i hope this is right

8 0
3 years ago
During glacial maxima, australia, new guinea, and tasmania were a single land mass called?
Over [174]

During glacial maxima, Australia, new guinea, and Tasmania were a single land mass called Sahul.

  • The single Pleistocene continent known as Sahul united Australia with New Guinea and Tasmania. Rising sea levels gave rise to the distinct landmasses that we can now recognize, even though the sea level at the time was up to 150 meters (490 feet) lower than it is now.
  • Australia, New Guinea, Tasmania, and Seram were all parts of the ancient continent Sahul.
  • Since the Last Glacial Maximum, sea levels have risen. Around 18,000 years ago, Sahul began to be partially submerged. Sea levels kept rising until roughly 5000 BCE.
  • After leaving Africa, early human migrations began in Sahul and Sunda. According to recent study, hundreds of individuals traveled in groups on bamboo rafts and eventually settled on Sahul.

learn more about Sahul here: brainly.com/question/18417621

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8 0
2 years ago
Researchers have noticed that some men who were sterile because their sperm cells were unable to move also had chronic infection
zimovet [89]

Answer:

Kartegener's disorder

Explanation:

The respiratory tract has cilia which move. Sperms also have a tail that moves. They both have the same protein in their structure called microtubules. There is a disorder in which there is the absence of a part in the microtubule. Dynein arms absent in microtubules. Because the respiratory system and sperm both contain cilia that's why these two systems have a connection and not work properly.

4 0
3 years ago
Can someone help me on this question THANKS :))
Vlad [161]

Answer:

They can interbreed

Explanation:

6 0
3 years ago
List two biomes and their features. List the at least three features of each one of your biomes.
DaniilM [7]

Answer:

Tundra Biome and the Deciduous Forest Biome

Explanation:

for tundra the features are Extremely cold climate, Low biotic diversity ,Simple vegetation structure. and for deciduous forest  is Deciduous forests have a long, warm growing season as one of four distinct seasons, There is abundant moisture, Tree leaves are arranged in strata: canopy, understory, shrub, and ground.

7 0
3 years ago
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