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Alik [6]
4 years ago
9

The six pollutants regulated under the clear air act ____ between 1970 and 2001, while energy consumption increased 42%.

Biology
2 answers:
White raven [17]4 years ago
8 0

the six pollutants regulated under the clean air act are carbon monoxide, lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide.

hope this helps :)

notka56 [123]4 years ago
3 0

Answer

The six pollutants regulated under the clean air act are;

• Carbon monoxide

• Ground-level ozone

• Lead

• Nitrogen oxides

• Particulate matter

• Sulfur dioxide

Explanation

According to the Clean Air Act (CAA) it requires the Environmental Protection Agency to set National Ambient Air quality standards. These standards are primarily set for human health and secondary for protection of the public welfare including effects on vegetation crops, and infrastructure. Some of the methods employed to reduce air pollution include control technologies and control measures.


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The correct option is (C) The eggs from the female laying 1,000 eggs have larger yolks than the yolks of the eggs from the female laying 100 eggs.

The sequence of survival and reproduction events characteristic for a member of the species is known as the life history of the species (essentially, its lifecycle).

  • Natural selection drives the evolution of life cycle patterns, which are a "optimization" of trade-offs between growth, survival, and reproduction.
  • The quantity of eggs laid by female fish during reproduction may vary, but it doesn't provide accurate information if the eggs from the female that lays less eggs have more yolk.
  • Given that the fitness factor remains the same, the quantity of eggs laid does not necessarily correspond to the amount of yolk in the eggs.

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During which eon did oxygen begin to build up the most in Earth’s atmosphere?
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During the phanerozoic eon
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Mollusks, frogs, sea urchins, and bees can all be classified into which group?
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2. Bone
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Osteoporosis causes bone density to decrease due to decreased osteoblast activity, increased osteoclast activity, and external factors like long-term medication. Option B. All choices are potential causes.

<h3>What are the factors that promote osteoporosis?</h3>

Let us first review what the bone cells are and their functions,

• Osteoprogenitores → in charge of osteocytes production

• Osteocytes → maintain the matrix

• Osteoblasts → Synthesize and secrete osteoid matrix that will later calcify

• Osteoclasts → Phagocytic cells in charge of osseous resorption and bone modulation.

Osteoporosis is a no-symptoms disease -silent- that causes a decrease in the bone mineral and mass density and might change the bone structure.

Osteoporosis weakens the bone until it breaks. So this affection becomes evident when a fracture occurs.

Several factors lead to osteoporosis development. Among them, we can mention,

  • genetic factors,
  • habits factors (lifestyle),
  • hormonal alterations,
  • drugs/medication

The increased rate of bone resorption is the major mechanism by which osteoporosis occurs. It deteriorates bone structure and decreases bone density.

Bone resorption and deterioration might be caused by

  • a decrease in osteoblast activity, leading to the decrease in osteoid matrix formation and calcification,

  • an increase in osteoclast activity, enhancing the activity of these phagocytic cells.

Other external factors also increase the probability of developing osteoporosis. Some of them are,

  • long-term medications (for instance, those used in cancer treatment)
  • excessive alcohol consumption and smoking
  • sedentary lifestyle
  • poor diet

According to this framework, the potential causes of the Osteoporosis are Decreased osteoblast activity, Increased osteoclast activity, Secondary to external factors like drugs/cancers.

Hence, <u>option B is correct</u>, All choices are potential causes.

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