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Slav-nsk [51]
3 years ago
6

The...........is a structure that supplies oxygen and nutrients to the fetus .

Biology
1 answer:
Ilia_Sergeevich [38]3 years ago
6 0

Answer:

The answer is D.

The Placenta

Explanation:

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Question 5
elixir [45]

Answer:

It increases for most species.

3 0
3 years ago
Which statement below correctly explains and gives the importance of the endosymbiotic theory?
mr_godi [17]

Answer:

The statement that best explains the endosymbiotic theory is that the inner and outer membrane of the mitochondria indicates these were once free living organisms which were taken into an early cell via endocytosis. The theory was further supported by the fact that mitochondria have their own DNA and replicate via binary fission (option B).

Explanation:

The endosymbiotic theory is due to the evolutionary biologist Lynn Margulies, who through his postulates tried to establish evidence of the origin of eukaryotic cells, by incorporating a prokaryotic cell into the interior of others.

Mitochondria -besides chloroplasts- are one of the examples that support the endosymbiotic theory.  Both mitochondria and chloroplasts have characteristics and behavior similar to that of a bacterium (prokaryote):

  • They have their own circular double-stranded DNA.
  • They have 70S ribosomes.
  • Protein synthesis capacity.
  • They have membranes that allow them to carry out their functions.
  • Their division is carried out by binary fission.

These characteristics support that some organelles were at some time independent prokaryotic cells that were incorporated into other cells, by endocytosis.

Learn more:

Importance of endosymbiotic theory brainly.com/question/583859

6 0
3 years ago
Read 2 more answers
In which layer would you find the most organic matter?
FrozenT [24]
I think it is subsoil but i’m not completely sure
3 0
4 years ago
Read 2 more answers
At Medicago, scientists remove a specific genetic sequence that codes for a hemagglutinin protein from an influenza virus and in
Mrrafil [7]

Answer:

The correct answer will be options-B and D

Explanation:

The studies on the history of origin and evolution of life on Earth shows that all the organisms have evolved from a common descendant. This indicates that they possessed the same chemical-genetic or heredity molecule called Nucleic acid whether DNA or RNA.

DNA acts as the universal genetic material as it is present in all organisms except few. The process related to the DNA molecule is the same in all the organisms.

Since in the given question, the transfer of genes to plants via <em>Agrobacterium</em> and then the expression of the gene in plants shows that the passing of DNA has no barrier as  DNA is the genetic material and the enzyme RNA polymerase recognized the gene which could help produce the mRNA from the gene.

Thus, options-B and D is the correct answer.

5 0
3 years ago
A molecule that has a negative end due to it attracting more electrons and a positive end due to that end not being able to hold
snow_lady [41]

Answer:

Zwitterion

Explanation:

A Zwitterion is mostly molecules of Aminoacid that has both positive and negative end.

8 0
4 years ago
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