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malfutka [58]
3 years ago
14

How does a placenta form?

Biology
1 answer:
LekaFEV [45]3 years ago
7 0

Answer: Placenta forms by fertilized blastocyst embeds in the uterine wall, and development of the fetus and placenta begin. ... These remodeled vessels become a source of maternal blood for the placenta. The placenta develops to bring oxygen and nutrients to the fetus and to move harmful waste and nutrients away.

Explanation: I looked it up on google.

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The synthesis of amino acids occurs in about 5 or 6 related families of amino acids. True or false?.
Andrei [34K]

This statement is true.

<h3>How many amino acids are synthesized?</h3>

For example, humans can only synthesize 11 of the 20 standard amino acids (a.k.a. non-essential amino acid), and in time of accelerated growth, histidine can be considered an essential amino acid.

<h3>Where does amino acid synthesis occur?</h3>

The process of making proteins is called translation and involves the step-by-step addition of amino acids to a growing protein chain by a ribozyme that is called a ribosome.

<h3>Is the amino group the 5 end?</h3>

The 5-prime (5') end of the polypeptide chain that has a nitrogen atom or a 'free amino group. '

Peptide bonds connect all of the amino acids of the chain together. (Norman, 7/22/09) When two or more amino acids are linked together, one end of the resulting molecule has a free amino group.

Learn more about amino acids here:

<h3 /><h3>brainly.com/question/21327676</h3><h3 /><h3>#SPJ4</h3>
4 0
2 years ago
Drag the tiles to the correct boxes to complete the pairs. Match the type of evidence for evolution to the correct example. Anal
malfutka [58]

Analogous structures include wings in birds and insects homo-logous structures are DNA sequences due to a common origin, and a vestigial structure can be the human appendix.

<h3>What are analogous structures?</h3>

Analogous structures are traits that have the same function but they originated in different lineages.

Conversely, homo-logous structures have the same common origin but they may play different functions.

In conclusion, wings in different taxonomic groups may represent analogous structures, DNA sequences are homo-logous structures when they have the same ansestor and the human appendix is a vestigial structure.

Learn more about analogous structures here:

brainly.com/question/11154123

#SPJ1

4 0
2 years ago
Tidal forces result in two tidal bulges because __________.
Hatshy [7]
There are two tidal bulges on the opposite sides of our planet Earth. It is because of the gravitational force of the moon and the inertias counterbalance. The major who is responsible for making the tides is the gravity. The one that counterbalances the gravity is called intertia. And together, they are the ones who are responsible for creating two major tidal bulges on our Earth.
6 0
3 years ago
Why don't the present shapes of the continent's fit perfectly into a supercontinent
quester [9]
Many reasons to be honest but the main one is because of erosion and the water levels (rising and falling)
8 0
4 years ago
What are two ways scientists get information about the evolutionary history of a species
Serggg [28]
One way is by comparative anatomy. Comparing the similar bone structure of animals gives more proof of this theory. Also, the location of some animals compared to other animals of similar species is very convenient, and supports the theory of natural selection.
7 0
4 years ago
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