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natulia [17]
3 years ago
12

A cross-sectional study of the relationship between blood type and the risk of cataracts may produce misleading results because

you cannot tell the correct temporal relationship between the exposure (blood type) and disease (cataracts). True or False?
Biology
1 answer:
Cerrena [4.2K]3 years ago
3 0

Answer: True

Explanation:

A cataract is a clouding of the lens of your eye. As one ages, proteins in the lens begin to break down and the lens becomes cloudy. One may not even realize they have a cataract because it usually grows very slowly and may not impede vision early on. While cataracts are rarely dangerous, after a number of years they will likely affect vision. Its important to note also that cataract is not caused by overuse of the eyes and it does not travel from one eye to the other.

Risk factors include aging, family history, high blood pressure, previous eye injury, smoking, obesity, heavy drinking and diabetes.

Therefore, from the above risk factors, we could expound that blood type (exposure) has no relationship with cataract.

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The repeated movement of water between Earth s surface and the atmosphere is called
Tresset [83]
The water cycle is the correct answer, the water evaporates, then condenses into clouds, and turns into rain and precipitation occurs.

4 0
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Damage to the ozone shield over the united states is likely to cause
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<span>Chlorofluorocarbons (CFCs) chemicals contain carbon, chlorine and fluorine and is t so expensive at the same time it’s not flammable, the reason why it is mainly used in business such as refrigerators and plastics. However, these chemicals destroys our stratosphere, the second layer of the Earth’s atmosphere and protects us by blocking the ultraviolet radiation (UV Light). This type of radiation can seep through organisms skins and can leave destructive effects on DNA molecules which will also cause skin cancer.</span>
6 0
2 years ago
The tensor fasciae latae stabilizes the hip joint and the __________ joint.
vladimir2022 [97]

Answer:

Knee.

Explanation:

Joints may be defined as the articulation by which the bones meet together and constitute the skeletal system. These joints helps in the particular movement of the body.

Tensor fasciae latae muscle is present  in the thigh. This muscle is attached with tibia and innervated by the super gluteal nerve that supplies the blood artery.  This muscle plays an important role in the stabilization of the knee and the hip joint.  

Thus, the correct answer is option (c).

4 0
2 years ago
After intense activity, your muscles feel sore because of
velikii [3]

Answer:

After intense activity, your muscles feel sore because of _____. a) the accumulation of NAD+ b) the accumulation of lactic acid c) the accumulation of ATP d) the accumulation of carbon dioxide. B. ... ATPc "carbon planet," because carbon is the central element in organic compounds. ... After intense activity, your muscles feel sore because of a. the accumulation of NAD+. b. the accumulation of lactic acid. c. the accumulation of ATP. d. the accumulation of carbon dioxide. b. the accumulation of lactic acid.

Explanation:

srry if this dosent help

5 0
2 years ago
A normal breath takes in about 1.0 L of air. If air has an average molar mass of 28.8 g per 1 mol and has a density of 0.97 g/mL
Ann [662]

Taking into account the definition of density and Avogadro's Number, you take 2.0286×10²⁵ molecules of air.

<h3>What is density</h3>

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density=\frac{mass}{volume}

<h3>What is Avogadro's Number</h3>

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

<h3>Amount of molecules of air</h3>

In this case, you know that:

  • Density= 0.97 \frac{g}{mL}
  • Volume= 1 L= 1000 mL

Replacing in the definition of density:

0.97 \frac{g}{mL}=\frac{mass}{1000 mL}

Solving:

mass= 0.97 \frac{g}{mL}  ×1000 mL

<u><em>mass= 970 g</em></u>

Air has an average molar mass of 28.8 g per 1 mol. Then 970 grams are contained in 33.68 moles.

Now, considering the definition of Avogadro's number you can apply the following rule of three: If 1 mole of air contains 6.023×10²³ molecules, 33.68 moles contains how many molecules?

amount of molecules = (33.68 moles× 6.023×10²³ molecules)÷ 1 mole

<u><em>amount of molecules= 2.0286×10²⁵ molecules</em></u>

Finally, you take 2.0286×10²⁵ molecules of air.

Learn more about

density:

brainly.com/question/952755

brainly.com/question/1462554

Avogadro's Number:

brainly.com/question/11907018

brainly.com/question/1445383

brainly.com/question/1528951

#SPJ11

4 0
1 year ago
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