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fredd [130]
3 years ago
10

Why are snakes’ scales and birds’ feathers regarded as homologous structures?

Biology
1 answer:
aev [14]3 years ago
6 0

Answer:

The feathers/scales are genetically modified and inherited from their previous ancestors which the feathers/scales drastically become different colors throughout the evolution of the bird/snake.

Explanation:

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Which of the following specifies a single amino acid in a polypeptide chain?
Nataliya [291]
<span>B. the complementarity of DNA and RNA
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3 years ago
What are the symptoms of cervical cancer in the early stages?.
Georgia [21]

Answer:

abnormal vaginal bleeding including between periods, after menopause and after intercourse

abnormal or increased amount of vaginal discharge

foul-smelling vaginal discharge

unusually long or heavy periods

bleeding after a pelvic exam or vaginal douching

Explanation:

Hope this helps! :)

5 0
3 years ago
Both myoglobin and hemoglobin exhibit cooperative binding to oxygen. True or False
lys-0071 [83]

Answer:

False.

Explanation:

An Haemoglobin molecule  is made up of 4-polypeptides, with each of the polypeptide chain containing an haem group. These haem group can bind with one oxygen atom each.

T<u>he binding of the first oxygen atom  by the first haem group weakens the tertiary protein   structure  of  Quaternary structure  Hb, thus it makes it easier for the second Oxygen atom to bind faster, and the 3rd oxygen very fast and the 4th oxygen atom the fastest.These accelerated binding of the oxygen atoms, facilitated by the first binding O2, is called cooperative binding.It aids oxygen binding capacity and tranport functions  of Hb,</u>

<u />

<u>Myoglobin is an oxygen storage protein in  muscles, and not oxygen carrying molecule, It releases  stored O2 only in condition of low oxygen supply</u>.It has   one haem group in its molecule.Therefore its structural features can  not  carry out  cooperative binding.

6 0
3 years ago
What is the difference between a unicellular organism and a multicellular organism? How does this affect function?
kvv77 [185]
Multicellular organisms can be much larger and more complex. This is because the cells of the organism have specialised into many different types of cells such as nerve cells, blood cells, muscle cells all performing different functions.
3 0
3 years ago
PLEASE HELP (50 POINTS)
baherus [9]

Athletics would be the easiest choice here

Sports are an active that takes up a lot of different organ systems. When running I use my muscular system and cardiovascular system the most. The cardiovascular system directly controls running because it helps prevent me from getting tired and worn out faster.

Hope this helps :)

7 0
3 years ago
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