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Novay_Z [31]
3 years ago
8

What prevents the backflow of urine from the urinary bladder to the kidneys?

Biology
1 answer:
Travka [436]3 years ago
7 0
There is a valve at the meeting point between each ureter and the bladder prevents the back flow of urine from the urinary bladder to the kidney
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Can someone please help me with this AP biology question?
MAXImum [283]
Mitosis:
Produces gametes
Process ends with identical cells
Growth and repair

Meiosis:
Produces 4 cells that each have 23 chromosomes

Both: I think crossing over occurs in both
Interphase occurs before process

Hope it helps
4 0
3 years ago
What microscope did Anton van leeuwenhoek use to observe single called organisms
IgorC [24]
<span>A Simple Compound Microscope</span>
8 0
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How does non-human life in an urban ecosystem differ from that in an undeveloped forest ecosystem? (Site 2)
DedPeter [7]
Often times, non-human life in an urban ecosystem is more disturbed in a way that changes happen rapidly, such as the soil and plant cover and temperature and water availability
7 0
3 years ago
Please Help!!!!! Emergency!!!
musickatia [10]

Answer:

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d. birds

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4 0
3 years ago
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In sickle-cell disease, malformation of red blood cells is caused by only one mistake for one amino acid in the genetic code for
pav-90 [236]

Answer:

A. True

Explanation:

Hemoglobin is a protein and has two distinct types of polypeptide chains. These are called the alpha and beta subunits. The gene that code for the beta chain undergoes a mutation in a single base that causes sickle cell anemia. Here, adenine base in the genetic code for glutamic acid is substituted with a thymine base.

The genetic code for glutamic acid in the beta chain gene is GAG. The "A" is replaced with "T" and the new code "GTG" codes for valine. Therefore, the mutated hemoglobin has valine in place of glutamic acid. This makes these mutated protein molecules to form aggregates resulting in a change in the shape of RBCs carrying them.

4 0
4 years ago
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