please help! I will give brainly! x

Why was 1990 an important year regarding air quality?

The United States took first steps to keep the air clean.
The United States created the Environmental Protection Agency.
Modifications and improvements were made to the Clean Air Act.
Funding was established under the Clean Air Act to study air pollution.

Answers

Answer 1

Answer:

C. Modifications and improvements were made to the clean Air Act.

Explanation:

Btw I answered first


Related Questions

How do animals obtain energy?
O A. By eating other organisms
B. By shedding hair or fur
C. By maintaining homeostasis
O D. By changing temperature

Answers

Answer:

By eating other organisms

Answer: A. By eating other organisms

Explanation:

Hope this helps <3

Most animal lineages evolved during the period.​

Answers

Answer:

Cambrian period

The Cambrian period, occurring between approximately 542–488 million years ago, marks the most rapid evolution of new animal phyla and animal diversity in Earth's history.

Explanation:

Answer:

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true or false: The main disadvantage of sexual reproduction is that it results in genetic variation among offspring.

Answers

Answer:

This statement is false.

Explanation:

it is not a disadvantage rather it is an advantage that it results in genetic variations among offspring.

write a passage that describes:
what the cell cycle is and the purpose of the cell cycle
What happens in each phase and stage of the cell cycle and mitosis.

There is no length requirement, but your passage must include ALL of the following terms.
1.
2. Pre-existing cells
3. Prokaryotic cells
4. Eukaryotic cells
5. Bacteria cells
6. Plant cells
7. Animal cells
8. G1 phase
9. S phase
10. G2 phase
11. M phase
12. Growth
13. Mitosis
14. DNA replication
15. Synthesis
16. Interphase
17. Chromosomes
18. Sister chromatids
19. Centromere
20. Spindle fibers
21. Cell division
22. Prophase
23. Metaphase
24. Anaphase
25. Telophase
26. Cell equator
27. Cytokinesis
28. Nucleus
29. Cleavage furrow
30. Cell plate
31. DNA
32. Genetic information
33. DNA replication
34. Cell cycle
35. Identical daughter cells
36. Parent cell

Answers

Answer:

Explanation:

36. Parent cell you know

Do dead trees have cells

Answers

yeah they do have cells

how can HIV affect individuals day to day life
- be precise

Answers

Answer:

that seems hard

Explanation:

Eutrophication both hurts and helps
aquatic environments.
true
false

Answers

Answer:

False. Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants, depletion of fish species, general deterioration of water quality and other effects that reduce and preclude use”.

The smaller the dose required to achieve a drug action the greater the drug potency try or false

Answers

Answer:

the answer is true

HELP PLEASE HURRY
PLEASE TELL ME THE SITE YOU GOT THE FACTS FROM

List 7 facts about a meteoroid

Answers

Answer:

https://solarsystem.nasa.gov/asteroids-comets-and-meteors/meteors-and-meteorites/overview/?page=0&per_page=40&order=id+asc&search=&condition_1=meteor_shower%3Abody_type

Explanation:

Answer:A meteoroid is a chunk of space rock. If it burns up while entering the Earth’s atmosphere it’s called a meteor and if a piece lands, it’s called a meteorite.

Millions of meteoroids travel through the Earth’s atmosphere every day, but most are small and burned up quickly. Very few reach the ground.

When a meteoroid hits the atmosphere of the Earth, they can be travelling as fast as 130,000 mph (209,215 km).

The blast caused by the shockwaves of the Chelyabinsk meteor in Russia was picked up by infrasound sensors on the other side of the world. Below is a video of that meteor.

The buying and selling of meteorite pieces in South Africa is illegal.

A meteorite that is seen or detected as it lands are called “falls”, with those that are discovered later being referred to as “finds”.

Meteoroids more than 10 metres in diameter are classified as asteroids.

Of the 500 estimated meteorites that reach the ground every year, only five or six are recovered for scientists to study.

Explanation HEHE

b. The muscle attachment that is usually relatively fixed is called its​

Answers

Answer:

Sud I k igkckcjc sorry I don't know

Answer:

Origin

Explanation:

Kayla is examining different soil samples and making notes about how well each sample sticks together. She has to soil's that she has classified as dry, ones as wet and one cemented. Which soil property is she examining?

A. Density

B. Structure

C. Texture

D. Consistency

Answers

I think it’s C because it’s dry, wet, and cemented! Hope this helps!

Answer: Consistency, i think

Explanation:

don't come at me if it's wrong please

Can’t roots be eaten as food? True or false.

Answers

Answer:

false

Explanation:

hope dis helps

Answer:

true, people have been eating roots for years

Hope this helps!!!

plz mark brainliest

Explanation:

please help find RNA code from DNA code

Answers

Answer:

her rna code would be.... AUG GGC UAC

Explanation:

i took this class last year and i always has an A+ in that class

1. What percentage of puppies would have the same genotype as the
parents, Ww?

Answers

Answer:

50%

Explanation:

This question involves a single gene with two alleles W and w in puppies. According to the question, the genotype of the parent organisms are Ww. In a cross between the two parents i.e. Ww × Ww, the following gametes will be produced by each parent: W and w.

Using these gametes in a punnet square (see attached image), the following genotype of offsprings will be produced: WW, Ww, Ww, ww. Hence, based on this question, the percentage of puppies that would have the same genotype as the parents, Ww are 1/2 × 100% = 50%.

in the drawings below, the arrows labeled Force 1 and Force 2 represent two forces acting on an object. The directions of the arrows show the directions of the forces, and the lengths of the arrows represent the strengths of the forces. Which answer choice shows an object being acted upon forces that do NOT add up to a Net Force of zero?

Answers

Answer:

The answer is the last one

Explanation:

Which owl was most fit?
O Owl 4 laid 4 eggs, of which all 4 hatched and all 4 young successfully left the nest.
Owl 3 laid 12 eggs, of which 10 hatched and were all eaten by a squirrel.
O Owl 1 laid 8 eggs, of which 6 hatched and 5 young successfully left the nest.
O Owl 2 laid 9 eggs, of which 8 hatched and 3 young successfully left the nest.

Answers

Answer:

Owl 1 laid 8 eggs, of which 6 hatched and 5 young successfully left the nest.

Explanation:

A scientist noticed that in acidic pond water some salamanders developed with curved spines. This was an example of a(n)
А
research
o
B
inference.
о
С
observation
D
hypothesis

Answers

Answer:

С  observation

Explanation:

This mode of investigation is an example of observation.

Observations are carried out using our senses and keen inquisitiveness. It can take place within a short period of time or an extended duration.

So; noticing the change in shape of the salamanders is making an observation.

Our sight, smell, taste e.tc are all observational tools.

Answer:

С. observation

Explanation:

Hope this will help

Which of the following is a correct way to report an example of the speed of an object?

A 50 s/m

B 50 m/km

C 50 m/s

D 50 s/km

Answers

Answer:

C. 50m/s

Explanation:

speed is distance/time

m/s

What is the world's smallest country?

Answers

Vatican City is the smallest country in the world

Answer:

Vatican City is the smallest country in the world, with an area of 526,235.6 square yards.

Explanation:

Explain how you found out that Lucy has ADA-SCID

Answers

Answer:

The first part of finding out Lucy having ADA-SCID was when I realized there were no HIV proteins in her blood, getting rid of the possibility of her having HIV. Then, I realized she had a high number of Deoxyadenosine in her blood. This proves she has ADA-SCID because when the ADA doesn't work you find excess amounts of Deoxyadenosine in the blood.

Explanation:

Answer:

The first part in finding out Lucy has ADA-SCID was when I realized there was no HIV proteins in her blood, which got rid of the possibility of her having HIV. Then, I saw that she had a high number of Deoxyadenosine in her blood. This proves to me that she has ADA-SCID because when the ADA doesn't work you find excess amounts of Deoxyadenosine in the blood. This is the answer.

Explanation:

true or false:
One difference between somatic cells and gametes is that somatic cells are identical to one another, while gametes are not

Answers

Answer:

true.

Explanation:

all the somatic cells of an organism have same number of chromosomes while gametes are haploid and have half number of chromosomes. so gametes are different from somatic cells.

If false, please make it a correct statement. A rancher uses a particular chicken for breeding purposes because, on average, she observed that the chicken laid more eggs than other chickens. The rancher selecting the desirable trait would be considered an example of natural selection.
a) true
b) false

Answers

Answer:

b) false

Explanation:

The given statement is false. the selection process used by the rancher is an example of artificial selection and not natural selection.

Artificial selection is defined as the selection process done by humans on the basis of desirable characters while in natural selection the selection is based on the  adaptive characteristics of animals. In the given example rancher choses a desirable character of chicken that lays more eggs.

Hence, the given statement is "false".

keyston Brothers do backflips into bed of roses​

Answers

Answer:

ok??

Explanation:


Please help me, List the living and non- living things shown in the picture, marking Brainly !

Answers

Answer: Living- hair,girl butterfly,cow,bacteria,tree,Jellyfish,seaweed,mouse,

Non-living-Computer,cellphone,robot, car,clouds,wind,fire,fossil,lightning,bread,clock,sand,snowman,sun,jack-o-lantern

Explanation:

I needs help plsssss

Answers

Answer:

so when photosynthesis starts the plant absorbs sunlight through the chloroplasts and the sunlight is converted into sugar

Explanation:

The way this happens is the reactants are carbon dioxide sunlight and water and the product is oxygen and sugar the oxygen is considered waste

The gene for nose shape is found on the X chromosome. Round nose is dominant to pointed nose. Human individuals with XXY (an additional X chromosome) are designated male. Individuals with XO (only one X chromosome) are designated female. Identify the possible nondisjunction events (rare mistakes during meiosis) that could explain the phenotype of the offspring. An XY parent with a round nose and a XX parent with a round nose have an offspring with Klinefelter Syndrome (genotype XXY) with a pointed nose.

Answers

Answer:

Explanation:

in this case female parent XX is hetrozygous for round nose. when a cross between round nose father XY and hetrozygous round nose mother takes place and suddenly a chromosomal nondisjuction occurs, the chromosomes carrying genes for pointed tip nose come togather in a gamete and a gamete (egg) with XX chromosomes is appeared having 24 chromosomes instead of 23. when this gamete fertilizes with a sperm having normal 23 chromosomes and only carry Y chromosomes, a pointed nose klienfelter syndrome case will appear.

Summarize for prophase?

Answers

Answer:

Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.

Explain how seasons are similar and different on your Uranus as compared to the Earth.​

Answers

Answer:

Uranus, like Earth, has four seasons. ... For starters, the length of Uranus' seasons are different from ours. It takes Earth 365 days to orbit around the sun, but it takes Uranus 84 Earth-years, more or less. So Uranus' year is 84 Earth-years along, and each season on Uranus lasts 21 earthly years.

Name 6 most dangerous chemical found in a U.S house hold?

Answers

Answer:

Antifreeze.

Bleach.

Drain Cleaners.

Carpet or Upholstery Cleaners.

Ammonia.

Air fresheners.

Explanation:

Answer:

Swallowing antifreeze (ethylene glycol) may cause damage to the heart, brain, kidney, and other internal organs. Inhaling antifreeze is not as dangerous, but may cause dizziness. Being a strong corrosive substance, bleach can affect the respiratory system if inhaled.

A farmer is trying to increase the diversity of corn kernel color in his crops. The trait for corn color is controlled by two alleles. Yellow corn (B) is dominant over white corn (b). Which combination of corn should he cross to get the most variety of genotypes for corn color in the next generation?
A. BB x BB
B. Bb x bb
C. Bb x Bb
D. BB x bb

Answers

Answer:

C

Explanation:

If the farmer crosses Bb x Bb, then the progeny will have BB, Bb and bb genotypes attributing to increased diersity of  corn kernel color in his crops.

What is a genotype?

The total complement of an organism's hereditary material is referred to as its genotype. The alleles or variants that an individual carries in a specific gene or genetic region are also referred to as their genotype. Genotype is another term for them.

There are three distinct categories of genotypes: heterozygous recessive (pp), heterozygous dominant (PP), and homozygous recessive (pp). Both the dominant homozygous genotype and the dominant heterozygous genotype exhibit the same characteristics.

Therefore, if the farmer crosses Bb with Bb, the offspring will have BB, Bb, and bb genotypes, which will contribute to an enhanced diversity of corn kernel color in the farmer's harvests.

Learn more about genotypes, here:

https://brainly.com/question/14928544

#SPJ2

Other Questions
Someone please help me quick Im timed WILL MARK BRAINIEST!Apply the dilation D to the polygon with the given vertices. Name the coordinates of the image points. D:(X,Y) > (3x,3y)J(1,4), K(6,4), L(6,1), M(1,1) Please help!!! I dont really understand this at all Hi guys, can you guys give me tips for more descriptive paragraphs. Such as, The blonde girl washed the dishes in the kitchen. And here is it more described. The tall blonde headed girl, was washing the dishes in her modern kitchen. PLEASE HELP ME ASAP?!?Find the length of the missing side. Simplify all radicals. Scene 2The boys soon come across a small hut in the woods. They group together behind a large tree close to the shelter. Suddenly, a loud growling sound comes from inside the hut, startling the boys.Quinn: Did you hear that?Reuben: Of course we did! It vibrated us from head to toe!Bailey: (Voice shaking) It sounds like there's a really terrible creature in there. (Shakes head and stands tall) We need to find out what it is so that we can keep others safe. The last time we used the hut after sledding, I noticed a small back door. We'll catch them off guard if we sneak in that way.Reuben: I like your thinking! Lead the way.The boys move silently toward the back of the cottage as the growling grows louder.Scene 2Inside the dimly lit hut, two shadowy figures huddle in front of a small fire pit. A third creature is nearby, crouched low and growling. With a bang, the back door flies open and the three boys rush in, shouting wildly.Bailey: We've got you surrounded, snow monsters!Surprised, the larger figures turn toward the boys.Bailey: (Shocked) Dad! Mom!The third creature, a dog, runs towards Bailey. It drops a large chew toy in front of him and growls expectantly.Bailey's Mom: (Chuckling) Snow monsters? Oh, my! What are you boys up to this time?Bailey: What are you up to? you were supposed to be at the vet. We followed some footprints here, but they couldn't have been yours. They must be from some sort of monster.Bailey's Dad: Were the footprints large and round?Quinn: Yes! Did you see them, too?Bailey's Mom: No, Quinn. We made them with these.Bailey's Mom holds up a pair of snowshoes.Bailey's Dad: We bought them on the way back from town, along with a chariot for Bella. The vet said the fresh air would be good for her, but she's still having trouble walking. We didn't mean to scare you, boys.Bailey: We weren't scared! Well, maybe a little.Reuben: It was all for nothing anyway, Bay. We were definitely barking up the wrong tree with this one!Everyone laughs.How might the story have ended if the setting from Scene 2 remained the same in Scene 3? 1. They might have found Bailey's parents in a different hut.2. They might have found Bailey's parents outside.3. They might have found snow monsters in the hut.4. They might have found snow monsters outside. Gina made a scale drawing of a house and its lot. She used the scale 1 inch: 4 feet. If the house'sdriveway is 9 inches in the drawing, how long is the actual driveway?feet The perimeter of a rectangular pool is 72 meters. If the length of the pool is twice its breadth. Its length is_________. CAN SOMEONE PLEASE HELP MEEEE? PLEASSEEE. EMERGENCY!! 30 POINTS!! PLEASE AND THANK YOU. Slove (3x-2)=(2x-1)/(2) show step by step Which sentence contains faulty parallelism?A. The summer program includes courses in cooking, sewing, and painting.B. The safest way to lose weight is by eating less and by exercising more.C. Imagination and patience are the marks of a good adviser.D. Carol likes browsing through encyclopedias and to learn odd facts. Act II, Scene I4. How does the arrival of George Murchison change the mood of the scene? Match each statement with the correct reasoning in the proof below given: AM = CM BM=DM How is the proportion of hydrogen to helium in the Sun's core changing over time? Why do people use their environments in their art? Jenny bought scrapbooking supplies for $145.00. She paid $11.60 in sales tax. What was the sales tax rate on the supplies? If necessary, round your answer to the nearest tenth. a) 7% b) 8% c) 9% d) 7.5% (HELP!!)Which of the following is the Senate NOT responsible for confirming or approving, if nominated or appointed by the President? * The Vice President Federal Judges US Ambassadors Cabinet Members -9(x+2)=54 apply the distributive property and simplify Charles goodnight founded what east Texas cattle trail? Ves a tu sobrino despus de muchos meses y es ya es un chico grande. Qu diras al?a "Qu alta y grande!"b Qu alto eres!"c ;Qu altos tienen!"d Qu largo!"