The Montreal Protocol of 1987 provided a global framework to phase out chlorofluorocarbon (CFC) production and use. A though the Montreal Protocol has led to a dramatic decrease in CFCs released into the atmosphere, stratospheric ozone destruction has decreased only slightly.

Answers

Answer 1

Answer:

True

Explanation:


Related Questions

the unaided eye perceive stars of the _______ magnitude

Answers

Answer:

sixth

Explanation:

yeah that's the answer but It said to explain so I'm jus telling u

If an average cell in an organism lives for 40 hours, how much time would it spend in each of the phases?

Answers

Answer:

A cell spends most of its time in (M phase) or metaphase, this is when the cell divides. The Ameba sisters videos can help you.

Explanation:

A scientist is studying a cell from an unidentified organism. Which of these observations of the cell provide evidence for classifying the cell as PROKARYOTIC and NOT EUKARYOTIC? Select all that apply
The cell has a cell wall.

The cell lacks mitochondria, chloroplasts, and other membrane-bound organelles.

The cell has a cell membrane.

The cell has ribosomes in its cytoplasm.

The cell lacks a nucleus.

Answers

Answer:

hfdjjjjjjhgjluhb

Explanation:

Genetically modified organisms include microbes used in biotechnology that possess enzymes promoting antibiotic resistance. This could be a problem given the rise of antibiotic-resistant organisms. However, these engineered microorganisms do not pose a risk to public health. What do you think prevents them from spreading antibiotic resistance to pathogens outside the laboratory

Answers

Answer:

What prevents these microorganisms from spreading resistance outside the laboratory is that they are modified to not survive outside the laboratory environment.

Explanation:

Antibiotic resistant microorganisms are very dangerous and unfavorable, as they leave living beings completely completely defenseless to their attacks. However, there are microorganisms that have been modified in the laboratory, as shown in the question above, and do not present any risk to living beings, even if they develop resistance. This is because the modification that these microorganisms received makes them not survive the environmental conditions outside the laboratory, which causes them to die if they leave the laboratory.

What causes the formation of a cervical plug a testorone b progesterone c luteal d estroge e follicle

Answers

Answer:

b progesterone

Explanation:

The plug is formed as soon as there is implantation of fertilized eggs. The thickness of the cervical mucus becomes different as hormone levels changes in pregnancy.  

The progesterone, encourages the production of thick fluid/ mucus  which brings about the formation of a plug. This prevents bacteria from getting into the uterine cavity.

Answer: The correct option is B (progesterone).

Explanation:

The cervix is the ring of muscles also called the neck of the uterus in female reproductive system. This protrudes through the anterior wall of the vagina, opening into it at the external os.

After the fertilization of the ovum by the spermatozoa, the uterus prepares for the implantation which results from the secretion of hormones. Under the influence of oetrogen, secreted by the developing follicle, the cells of the endometrium divide rapidly causing the endometrium to build up and thicken.

While the viscosity of cervical mucus changes in response to hormone levels and during pregnancy, progesterone fosters the production of highly viscous mucus resulting in the formation of a plug that forms a physical barrier to bacteria and prevents their ascension into the uterine cavity. This plug is called CERVICAL PLUG.

Would you predict more earthquakes in areas where tectonic plates are colliding or where they are moving apart?
PLSS HELPP MEEE

Answers

Answer:

Maybe where they are colliding because when they collide there is going to be a wave of impact that will go to the surface

Explanation:

The tube in the penis where sperm exits is

Answers

Answer:

The vas deferens transports mature sperm to the urethra in preparation for ejaculation.

Answer:   testes

Explanation:

Sperms are made in testes.

How is oxygen carried from your lungs into all of your cells for cellular respiration?

1. It slowly diffuses throughout your whole body from your lungs
2. It is carried by your red blood cells through your blood stream
3. Cellular respiration only takes place in the lungs, so you do not need to transport oxygen
4. Oxygen is not necessary for cellular respiration

Answers

Answer:

2.  It is carried by your red blood cells through your blood stream.

Explanation:

The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell.

Because conservation means using fewer natural resources and reducing wastes, it helps
a.
slow overpopulation and grow food.
b.
prevent habitat destruction and reduce pollution.
c.
prevent biodiversity and destroy species.
d.
stop exotic species and create habitats.


Please select the best answer from the choices provided

A
B
C
D

Answers

Answer:

a

Explanation:

just did it

Answer:

the answer should be "B"

Which of the following are the main components of an mRNA vaccine?
mRNA and B-Cells that recognize the coronavirus
mRNA and antibodies that can inactivate the coronavirus
mRNA and spike proteins from the coronavirus
mRNA only

Answers

I'm not an expert so take this with a grain of salt, but I'd say mRNA and spoke proteins

What is respiration and the types of respiration​

Answers

Answer:

Hey mate......

Explanation:

This is ur answer.....

Respiration is the process by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.

Three types of respiration include internal, external, and cellular respiration. External respiration is the breathing process. It involves inhalation and exhalation of gases. Internal respiration involves gas exchange between the blood and body cells....

Hope it helps!

Brainliest pls!

Follow me! :)

The energy required to get a reaction started is called activation energy.
]
True
False

Answers

Answer:true

Explanation:

You have learned that scientists have found physical evidence of the Flood. In this project you will think about Noah and his construction of the ark.



Pretend that you are a newspaper reporter, and you are able to interview Noah. Then write a newspaper article about your interview.



Answer these questions.

What kinds of questions would you ask him?



Write a news article on your interview with Noah. (100 words or more is fine)
Need help asap just answer write the article the first 1 i already answered just copy pasted the questions

Answers

Answer:

We got a chance to speak to Noah the Ark builder. Many people of the town have been wondering what Noah has been building lately. We asked him what was his objective and he said "A great flood like no other will come, water from the sea will fall from the air. Whoever is in the ark shall be safe. Two of each type of animal on earth shall come to my ark for shelter. The storm will be so great it will knock out all who does not inhabit the ark."It is hard to understand what he means by these statements but who knows maybe his boat will take him somewhere. The people of the town have been calling him insane, since no one would need a boat that big.

(I'm guessing that you mean the interview was before the flood since everyone died after.)

As native mason bees visit flowers, they spread pollen while also consuming nectar from the plant. This is an example of symbiosis.
true or fasle

Answers

Answer:

True

Explanation:

Symbiosis is a type of relationship or interaction between two different biological organisms/species by which both are benefited. The bees such as mason bees are pollinators. Pollinators are animals (especially insects) that help the development of seeds and the fruit surrounding seeds by the pollination of flowers, i.e., by the transference of pollen from male anthers of a flower to the female stigma. During this process, pollinators eat nectar, which is a sweet energy-rich liquid secreted by flowers. In consequence, both species (i.e., plants and mason bees) are benefited from this interaction.


Which three statements are true about the energy flow in an ecosystem?

Answers

Answer:

main source of energy for an ecosystem is the sun producers convert radiant energy to chemical energy the maximum amount of biomass is at the lowest trophic level

Answer:

A,B and E

Explanation: hope it helps you :)

Indicate whether the statement is true or false.
This is Ag work please answer correctly

____ 1. Plants are used directly and indirectly to meet human needs

____ 2. A steer is a female cow that has given birth

____ 3. You have to live on a farm to be an FFA member

____ 4. We believe are the first two words of the FFA creed

____ 5. Thank you notes are required to get a job


____ 6. Only female turkeys gobble

____ 7. A first year FFA member is called a Greenman

____ 8. To be in FFA you have to be in an Agriculture class

____ 9. It is okay to let a non FFA member wear your FFA jacket

____ 10. You have to be in FFA to have an animal project

____ 11. It is okay to leave blanks on a job application

____ 12. A male turkey is called a Tom

____ 13. While in FFA official dress it is acceptable for makes to wear khaki pants

____ 14. A cow is a ruminant animal

____ 15. Cows have only one stomach compartment

____ 16. Turkeys grow to full maturity in about 4 to 5 months

____ 17. The FFA is only in the state of Texas

____ 18. The FFA emblem plow stands for labor and tillage of the soil

____ 19. There are 3 paragraphs in the FFA creed

____ 20. A turkey under sixteen weeks of age is called a roaster

____ 21. Wild turkeys are white in color

____ 22. Freeze branding is the only way to identify cattle

____ 23. A job application is one of the first barriers that you encounter before you are employed

____ 24. The gestation period of cattle is only 3 months

____ 25. Domesticated turkeys cannot fly

____ 26. A T-bone steak is considered a by- product

____ 27. The official colors of the National FFA are blue and gold

Multiple Choice
Identify the choice that best completes the statement or answers the question.

____ 28. Which act established vocational agriculture courses in 1917?



____ 29. What did FFA stand for before it was changed?




____ 30. The official colors of the FFA are


























____ 31. How should the FFA jacket be worn?


































____ 32. List the parts of the FFA emblem




____ 33. Plants impact what environmental factors?








____ 34. When measuring a horse 1 hand= _____ inches





____ 35. Who wrote the FFA creed?








































____ 36. What provides the foundation of the FFA emblem?
































____ 37. The FFA emblem has how many symbols?





























____ 38. The highest FFA degree members can earn is…



____ 39. The first line of the FFA motto is

















____ 40. List the official Dress for females


























































____ 41. What are the last few words of the first paragraph of the FFA creed










































____ 42. In ___________ the FFA opened membership to girls




____ 43. ______ believe in less dependence on ________ and more power in bargaining




____ 44. The Symbol on the FFA Emblem that signifies Labor and tillage of the soil is





____ 45. What does polled mean?





____ 46. breeds of cattle are known for milk production




____ 47. What do you call a neutered male cow?



____ 48. What do you call a male sheep or goat that has been castrated when its young?



____49. Swine breed most used for pets




____ 50. The most popular goat breed used for FFA projects

Answers

Answer:

1True

Explanation:

Because plants and animals are in various relation. example Food air and e.c.t.

5. Our nervous system and our skeletomuscular system help us react to stimuli. Give one example on how this helps us maintain homeostasis.

Answers

Answer

The nervous and skeletomuscular systems help maintain homostasis by regulating respiration.

Explanation:

The brain stem, consisting of the pons and medulla, represent the main respiratory center.   According to Wikipedia, "an increased level of carbon dioxide in the blood, or a decreased level of oxygen, will result in a deeper breathing pattern and increased respiratory rate to bring the blood gases back to equilibrium."

This is an example of a homostastic response controlled by both of the organ systems referenced above.

Source: https://en.wikipedia.org/wiki/Homeostasis

During the Second Industrial Revolution, which building material became one of the most important in the world?
brick
wood
stone
steel

Answers

Steel as it was one of the newest. However steel factory’s have much gone out of business in city like areas as quaternary sector jobs are now taking over requiring higher skilled workers

How does polyploidy allow speciation to occur in a single generation? Polyploid offspring produce gametes earlier in the mating season than than their diploid parents, causing reproductive isolation between the two generations. Polyploid offspring produce smaller gametes that disperse farther than the gametes of diploid parents, causing geographic isolation between the two generations. Physiological differences between polyploid offspring and their diploid parents allow them to thrive in different environments, causing geographic isolation between the two generations. Genomic differences between polyploid offspring and their diploid parents prevent them from successfully interbreeding, causing reproductive isolation between the two generations.

Answers

Answer:

Genomic differences between polyploid offspring and their diploid parents prevent them from successfully interbreeding, causing reproductive isolation between the two generations.

Explanation:

Speciation is an ecological and biological process through which new species are formed due to isolation.

In plants, polypoidy involves the possession of two complete sets of chromosomes and it leads to the origin of new species. Also, the two sets of chromosomes comprises of triploidy (69 chromosomes) and tetraploidy (92 chromosomes).

As a result of the genomic differences between polyploid offspring and their diploid parents, this usually prevent them from successfully interbreeding and consequently causing reproductive isolation between the two generations.

PLEASE HELP! WILL MARK BRANLIEST!
The amount of carbon today is the exact amount that has always been on Earth. T or F

Answers

Uhmmmm that’s definitely false.

SCIENCE
Which of the following is an example of a glacial formation?
A. Photosynthesis
B. Methane degradation
C. Photolysis
D. Weathering of rocks

Answers

The answer for this question is A

Answer:

Letter D is the Correct answers

Explanation:

base on my research

Because the imaginary axis of the earth is inclined to the sun at the equator, the northern and southern hemispheres shine in different ways. When it is summer in the northern hemisphere of our planet, then it is winter in the southern hemisphere

Answers

Answer:

Yes.

Explanation:

Yes, when it is summer in the northern hemisphere of earth, then it is winter in the southern hemisphere. This change of season occur due to tilting of earth. The season of northern hemisphere and southern hemisphere are different and opposite to each other because both are present at opposite location on the earth surface. The tilting region experience winter season whereas the other regions experience summer due to direct sunlight.

Dados los elementos Ca y Cl
a) Escribir la CE (Configuración electrónica)
b) ¿Cuál de estos átomos tiende a perder electrones y cuál a ganarlos? ¿Cuál formará aniones y cual cationes?
c) Escribir la estructura de Lewis para la sustancia iónica cloruro de calcio (CaCl2).

Answers

Answer: The answer is c

What are the base units the SI units are based on

Answers

Answer:

he units in the revised SI are based completely on seven unchanging quantities or “universal constants,” including the speed of light, the amount of electric charge in an electron, and the Planck constant.

hope it helps

During strenuous exercise, lactic acid fermentation begins because the muscle cells are not getting enough


water

glucose

oxygen

ATP

Answers

Answer:

oxygen

Explanation:

Without oxygen aerobic respiration cannot occur. Therefore ATP is produces by anaerobic reparation which is from glycolysis only. Lactate/ lactic acid is formed when glycolysis is the only production of ATP.

1.Condition in which one allele is dominant over
the other​

Answers

Answer:

The condition in which an allele is dominant over another allele is dominance

Can someone help me?

Answers

Answer:

1. lytic/losigenic cycle

2. Restriction enzymes (breaks) and DNA ligase (joins)

3.mitosis (creation of twin daughter cells)

4. mitosis had helped humans with cell growth and repais (and keeps a steady supply of new cells)

Explanation:

it first goes through the lytic cycle where one bacterium inserts it's own dna into a host (human cell) and into the human DNA and it starts multiplying inside human cells in the lysogenic cycle

What does stage 4 show?
A. A young female cone with fertilized eggs matures into a seed
cone.
B. A spore divides and grows into a pollen grain using mitosis.
C. Young male cones produce spores using meiosis.
D. A seed that contains an embryo plant grows into a young pine
tree.

Answers

Answer:

A.

Explanation:

It looks like the pine cone looks like is turning into a normal cone. That is why.

Answer: A. it looks as if its matured from being a young cone

in your own words, what is the definition for Exocytosis?

Answers

Answer:

the release of cellular substances.

Explanation:

hope this helps

In which ocean's zone would you expect to see the
ecosystem shown?
the open ocean
the intertidal zone
the benthic zone
the neritic zone
zone?

Answers

Answer:

La zona intermareal

Explanation:

Por que en la información del texto

Answer:

Intertidal zone

Explanation:

I took the assigment :)

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