Who administers the Clean Air Act?

Answers

Answer 1

Answer:

In the United States, the Clean Air Act is administered by the Environmental Protection Agency (EPA).

What is the EPA

The EPA is a federalagency responsible for implementing and enforcing environmentalregulations, including those related to air quality.

The EPA sets national air quality standards, establishes emissions regulations for industries, monitors air quality, and works with state and local governments to implement and enforce air pollution control measures.

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Answer 2

Answer: Since it's about national environment, it is administered by the U.S. Environmental Protection Agency (EPA).

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_____ converts atmospheric nitrogen into ammonium, which plants absorb. The plants, by _____, incorporate the ammonium into proteins. Ammonification, nitrification;Nitrogen fixation, assimilation;Assimilation, nitrogen fixation; or Nitrification, denitrification?which one?
Explain in detail the plausibility of a volcano erupting in Odessa, TX.PLEAAAASSSEEEEEE HHHEEEEELLLLLPPPP
An enzyme known as amylase is found in the saliva of humans. This enzyme helps to begin the process of digesting starch molecules in the foods we eat. Which of these BEST describes how enzymes like amylase help in the process of digestion? (AKS 1a1) Question 2 options: Amylase contains the DNA molecules necessary to assemble the proteins needed for digestion. Amylase is a catalyst that speeds up the chemical process of breaking down food molecules. Amylase breaks down the food molecules directly by forming powerful acids. Amylase acts as a buffer to keep the pH of foods at a consistent level.

How did the geocentric theory change over time as increased scientific knowledge led to increased consensus within the scientific community?a.Scientists demonstrated that Earth revolves around the sun.
b. Scientists proved that Earth was the center of the universe.
c. The sun began to rise in the east several centuries ago.
d.The observations for a geocentric solar system became increasingly well documented.

Answers

The way how the geocentric theory change over time as increased scientific knowledge led to increased consensus within the scientific community is a.Scientists demonstrated that Earth revolves around the sun. This event was the best supporting detail which led scientific community to change their views and made them make a huge step towards future.

Answer: b

Explanation:

The first antibiotic was made because of properties discovered in a certain type of

Answers

Answer: certain type of fungi

Explanation:

Antibiotic used to cure bacterial infections that is obtained from fungi of the Penicillium genus .

Scientist Fleming discovered by accident that there was a fungus capable of killing some bacteria. In this way, he had some culture plates (small plates of glass or plastic in which the microorganisms can grow) that remainded forgotten and contaminated with mold, and around the growth zones of the fungus, he could see that there were no bacteria. Intrigued, he began to study that phenomenon.

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The ancient Egyptians discovered it on bread mold. Alexander Fleming discovered what would become Penicillen.

Which statement is true for cephalochordates? Notochord is present only in the larval stage; it is absent in adults. Notochord is present in the larval stage; it transforms to vertebrae in adults. Notochord is present throughout their lives.

Answers

Notochord is present in the larval stage; it transforms to vertebrae in adults

Answer:

Notochord is present throughout their lives.

Explanation:

Within the phylum of the chordates there are three subphylum. Cephalochordates, Urocordated and Vertebrates. Unlike the others, in the cephalochordates the notochord is present throughout its life, this extends dorsally from the tail to the head. The cephalochordates are considered primitive animals, live in marine waters and they feed by filtering.

In 1998, paleoanthropologist Rick Potts published an article in The Yearbook of Physical Anthropology, a peer-reviewed journal. The article was titled “Environmental Hypotheses of Hominin Evolution.” In his paper, Potts claimed that great variations in environmental conditions over time were responsible for the adaptability of humans and the success of our species. Which would most likely be found in his paper? a review of modern human anatomical structure
evidence of changing environmental conditions, with references
the reasons competing hypotheses are wrong
his opinion of what will happen to the survival of the human race

Answers

All of the options could reasonably be a part of the paper, and all of them would make the paper better. But one of the options is actually absolutely necessary: evidence of changing environmental conditions, with references- this is the correct answer.

This is because his argumentation is based on the assumption of "great variations in environmental conditions over time "- so he has to proove that there were those variations.

Answer:

The most appropriate answer would be "evidence of changing environmental conditions, with references".

As Mr. Potts claimed that great variations in environmental conditions over time were responsible for the adaptability of humans and the success of our species in his paper, he must have mentioned evidence of changing environmental conditions with references.

In addition, he must have shown the effects of changing environmental conditions on the adaptations made by human species due to those changes.

Can someone help me with this science question? Please.

Answers

Answer:

Nitrobacter and nitrosomonas

Explanation:

Both are bacteria and form nitrates and nitrites from ammonia

In order to cool the body down, the body will react to maintain homeostasis. Identify one way in which the body will react.A) shivering
B) contraction of body hair muscles
C) thyroid hormones increase basal metabolic rate of cells in the body
D) blood vessels dilate and blood is directed to the superficial layers of the skin

Answers

Blood vessels dilate and blood is directed to the superficial layers of the skins is one way in which the body will react to maintain homeostasis.

Homeostasis is the set of self-regulation phenomena that lead to the maintenance of constancy in the properties and composition of the internal environment.

Control in blood flow is a response that reduces heat transfer and therefore maintains body temperature.

Thermoreceptors upon detecting an increase in body temperature, are activated and transmit this information to the hypothalamus that receives the information.

Blood vessels constrict to reduce the passage of "warm" blood to the skin, allowing it to be used in vital organs.

Blood vessels in the skin dilate as a result of increased body temperature, allowing molecules to separate and occupy more space.

In addition, it increases the amount of warm blood that flows from inside the human body, increasing blood pressure and transmitting heat to the outside environment more quickly.

This allows body temperature to be lowered, a notorious consequence of this dilation of the vessels is the reddening of the skin where there is greater flow and transfer of body heat.

Therefore, we can conclude that blood vessels dilate and blood is directed to the superficial layers of the skins is one way in which the body will react to maintain homeostasis.

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The answer is D I believe. It is called vasodilation. As the blood vessels dilate and skin is directed to the skin, your body looses heat through skin by convection.

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For many women around the world, life is a seemingly unending process of childbirth, child-rearing, and hard domestic labor, while men often enjoy free time and more opportunities to socialize. What is this a result of?A) enforced gender stereotypesB) normal gender rolesC) gender stratificationD) enforced performance

What are the responsibilities of the region of the brain highlighted below? a. Controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. b. Regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. c. Regulating the body’s homeostasis, hunger and eating, thirst and drinking, and other functions of basic survival. d. Coordinating movement and balance by using information from sensory nerves, including hand-eye coordination.

Chemical reactions carried out by living systems depend on the ability of someorganisms to capture and use atoms from nonliving sources in the environment.The specific subset of these reactions that break down nutrients in food can bedescribed as _____________.(a) metabolic.(b) catabolic.(c) anabolic.(d) biosynthetic.

Parasitic bacteria that depend on eukaryotic host cells are A. protozoa. B. rickettsia. C. fungi. D. viruses.