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IRINA_888 [86]
2 years ago
8

Are there any parts of the human body that get oxygen directly from the air and not from the blood?​

Biology
2 answers:
Fed [463]2 years ago
8 0

Answer:

The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air.

Explanation:

Scilla [17]2 years ago
5 0

Answer:

Yes. Upper-layer skin cells and the cells in the front surface of the eyes get a significant amount of oxygen directly from the air

Explanation:

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How does independent assortment increase genetic variation in Meiosis?
KIM [24]

Answer:

Independent assortment produce new combinations of alleles.

Explanation:

In meiosis I, crossing over during prophase and independent assortment during anaphase creates sets of chromosomes with new combinations of alleles. Genetic variation is also introduced by random fertilization of the gametes produced by meiosis. It results in gametes that have unique combinations of chromosomes.

3 0
2 years ago
A titratable group is in the active site of an enzyme and must be protonated for the enzyme to function. Assume that the group h
olya-2409 [2.1K]

Answer:

The correct option is 3. "At pH 6.5 the enyzme is 50% active"

Explanation:

For the titratable group to be protonated and cause the enzyme to be in the active state, it needs to have gained a hydrogen cation (H+). In order for that to happen, there must be enough hydrogen cations in the environment of the enzyme, and hence, an acidic pH is required in this case.

7 0
3 years ago
Food, then
White raven [17]

Answer: sorry I don't know but if I did I would help

Explanation:

3 0
3 years ago
Read 2 more answers
What is the volume of 0.25 mol of ammonia gas at 1.00 atm and 273 K? (R= 0.0821 Latm/molK)What is the volume of 0.25 mol of ammo
ICE Princess25 [194]

Answer:

5.6L

Explanation:

Given parameters:

number of moles  = 0.25mol

pressure on gas  = 1atm

temperature  = 273K

Gas constant R = 0.0821Latm/molK

Unknown:

Volume of gas  = ?

Solution:

Using the ideal gas equation, we can solve this problem. The equation is a combination of the three gas laws: Boyle's law, Charles's law and Avogadro's law.

It is mathematically expressed as;

             PV = nRT

where P is the pressure

           V is the volume

          R is the gas constant

          T is the temperature

          n is the number of moles

All the parameters are in the appropriate units and we simply solve for the volume of the gas;

                1 x V = 0.25 x 0.0821 x 273

                      V  = 5.6L

4 0
3 years ago
Compared with DNA replication, transcription is _______ error prone because of differences in _______.
Tatiana [17]

Answer:

more ; the proofreading system

Explanation:

Transcription is considered to be more error prone and this is mainly attributed to differences in the proofreading system.

Hope this helped! :^)

8 0
3 years ago
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