Answer:
A.The hole in the ozone layer
Explanation:
• Montreal protocol is an international treaty that was signed to control the use of substances that are resulting in the depletion of the ozone hole.
This treaty was signed in the year 1987 and became effective form 1989.
• Since the time that this treaty has come into force, there has been a significant improvement in the ozone hole that was observed over Antarctic as it's size has decreased.
• This improvement has been possible because the treaty helped to phase out chemicals such as chlorofluorocarbons, carbon tetrachloride, etc. that are responsible for ozone hole depletion.
Why do baby bones contain more cartilage than an adult's?
What is photosynthesis? What does it involve?
Based on the graph, it can be concluded that the isotope which is most likely to be found with 6.25% of its original amount in 6 billion years is
Uranium-238
Thorium-235
Potassium-40
Rubidium-87
Potassium is most likely to be found with 6.25% of its original amount in 6 billion years because the half life of Potassium-40 is 1-1.5 billion years in graph. Thus the correct option is C.
If it half in 1 to1.5 billion years = 50% gain
1-1.5 billion years = 25%. gain
If we do that 2 more times we will get 12.5% and then 6.25% gain.
What is half life?
Half life is defined as the time required for half of the atoms of a radioactive substance to become disintegrated.
Our estimate is about 1-1.5 billion years so repeating that about 4 times we get around 4-6 billion years for it to gain 6.25%. From this it can be concluded that Potassium-40 as since it comes the closest to remaining at 6.25% its original amount after approximately 6 billion years.
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b. Write a simple word equation to show how NPP is derived from GPP :
The net primary productivity (NPP) and the gross primary productivity (GPP) are related such that: NPP = GPP - Respiration
What is NPP?NPP refers to the net primary productivity of ecosystems. It is the amount of sugar made from photosynthesis when the amount of sugar burned during respiration has been deducted.
The total amount of sugar made during photosynthesis is the Gross Primary Productivity (GPP). This amount does not include the amount of sugar burned by respiration.
Thus, the equation relating the 3 variables would be:
NPP = GPP - Respiration
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How do you think the reef will react to a lionfish invasion if there was no sea urchins?
The population of reefs reduces drastically if there are no sea urchins since lionfish use them as a source of food. That way, the lionfish began feeding on the reef itself.
Which phrase correctly identifies one way that veins function in the circulatory system?
Blood is carried under high pressure in veins.
Gas exchange takes place over the thick walls of veins.
Blood is prevented from backflow by valves in veins.
Nutrient exchange takes place over the thin walls of veins.
Veins carry blood back to the heart--often against the pull of gravity.
Answer:
Blood is prevented from backflow by valves in veins.
Explanation:
Seafood watch has made several unsustainable fishing practices illegal. please select the best answer from the choices provided t f
Seafood watch has made several unsustainable fishing practices illegal, is a true statement.
What is a Seafood watch?Seafood Watch is a program sponsored by the Monterrey Bay Aquarium; recommendations for which seafood to buy or avoid; consumers and businesses to become advocates for "ocean-friendly".
Seafood Watch has had an immense influence on decisions regarding illegal fishing practices and has helped design sustainable seafood environments due to their lists of seafood that should be eaten without worries.
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Answer:
False.
Explanation:
Just took the test. Also... It is false because Seafood Watch is not a legal authority and does not have the power to make fishing practices illegal. Seafood Watch is a program run by the Monterey Bay Aquarium that provides recommendations and guidance on sustainable seafood choices based on scientific assessments of fisheries and aquaculture practices. It aims to inform consumers and promote sustainable fishing practices but does not have legal authority to enforce regulations or make fishing practices illegal. That responsibility lies with governmental bodies and regulatory authorities.
what is the main purpose of the human genome project?
a.to find dna in a cell
b.to find lost dna
c.to create new genes
d.to map all base pairs in dna
Answer:
d. to map all base pairs in DNA
What will happen to the other members of the food chain if the grasshoppers are removed?
Answer:
some of the animals that feed on the grasshoppers will die
Explanation:
if they do not have the regular supply of food, they will die of hunger
which type of orchid is the best for houseplant beginners?
Answer:
For those who are new to growing orchids or those who love the beautiful blooms, the Phalaenopsis orchid is considered to be the best orchid for beginners. Our online video will help you pick the perfect orchid for your home. Phalaenopsis orchids are also known as “moth orchids” for the shape of their petals.
I have a Phalaenopsis Orchid in my house, it's very easy to take care of. Like a fish, but fish cost more money.
Explanation:
Water and sun, that's all there is to it.
Is platypus a type of fish
Explain
Question: "Is platypus a type of fish?"
Explanation: The platypus is classed as a mammal because it has fur and feeds its young with milk. It flaps a beaver-like tail. But it also has bird and reptile features a duck-like bill and webbed feet.
Answer:
yes done to explaine in down
Explanation:
ty for rhe points
Which of the following is NOT a process farmers used long ago to increase the food supply?
A. used pesticides to protect crops from bugs
B. diverted streams for irrigation
C. domesticated wild animals and bred them
D. cleared forests for open land for crops
Answer:
b. diverted streams for irrigation
Which of the following describes an environmental consequence of population growth?
Increase in prevalence and spread of disease
Degradation of land, with decreased pollution
Loss of habitat and biodiversity and less extinctions
Climate change, increased drought, and less storms
Which is NOT an example of electromagnetic radiation?
a. radio waves
b. X rays
c. gravity
d. visible light
Answer:
Electromagnetic spectrum consists of radio waves, microwaves, infrared waves, visible spectrum, ultraviolet waves, X-rays and gamma rays. It does not include alpha rays.
!HELP please it’s due now!
Three quarters of Earth's surface is ocean. The aquatic communities found in the ocean are called marine ecosystems
appose the amount of sunlight in a marine ecosystem is drastically reduced Identity two different effects this change in sunlight will have on the ecosystem and explain how each impacts the aquatic communities. Tyy
Answer:
Laboratory studies suggest changing ocean chemistry will 1) harm life forms that rely on carbonate-based shells and skeletons, 2) harm organisms sensitive to acidity, and 3) harm organisms higher up the food chain that feed on these sensitive organisms.
Explanation:
These include the open ocean, the deep-sea ocean, and coastal marine ecosystems, each of which has different physical and biological characteristics.
What information can a scientist learn directly from a single fossil?
OA. How the organism is related to organisms on Earth today
B. How many offspring the organism
produced
C. What the organism looked like
D. How long the organism lived
SU
SAAMINE
KORT THING SPIRING HARU
P
FOUN
D
leve
PROTEILE SE
mais rond
SARDE
sang big
According to the research, a scientist can learn directly from a single fossil how long the organism lived and what it looked like.
What is a fossil?They are the remains of an organism and the organic substances that present a certain degree of petrification and are naturally located in the various terrestrial layers.
These organic remains found in the strata of sedimentary rocks serve to date their ages, providing information on specific periods in the history of the planet.
Therefore, we can conclude that according to the research, a scientist can learn directly from a single fossil how long the organism lived and what it looked like.
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In general, what happens to the hormone levels between days 21-27 just prior to menstruation if the egg was not fertilized
If the egg has not been fertilized, the increase in progesterone and decrease in estrogen, forcing the egg to be expelled.
What hormones change during menstruation?It is known that in the premenstrual period there is a drop in serotonin levels. The second important factor to cause PMS is the hormonal change that occurs in the second half of the menstrual cycle, with an increase in progesterone and a decrease in estrogen.
With this information, we can conclude that if the egg has not been fertilized, the increase in progesterone and decrease in estrogen, forcing the egg to be expelled.
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Like the camel, many animals that live in soft sandy areas have large wide feet compared to their body size. The
large feet are an advantage in these environments because they -
are rapidly toughened by sharp sand grains
distribute body weight over a large area
allow rapid digging in the sand
Dreduce the vibrations caused by walking
Answer:
distribute body weight over a large area
Explanation:
This one's fairly simple. If you have large feet, then your body weight is distributed over a large area (you don't sink as much in sand). If your toes were small, massive body weight would sink the feet into sand.
A_____ is a chemical substance that organisms require to live
Answer:
A NUTRIENT IS A CHEMICAL SUBSTANCE THAT ORGANISMS REQUIRE TO LIVE
What is produced by translation
any kind of energy is produced by translation
Compared to many other liquids, water has a high heat of vaporization, which means a relatively large amount of heat must be added to the water before the water molecules are moving fast enough to escape the surface as a gas. Which of the following explains why water has a high heat of vaporization?
A Adding heat to the water causes the molecules to move around, and the motion keeps pushing them back below the waters surface
B As water molecules heat up they tend to form more hydrogen bonds with each other, making it difficult for any of the molecules to vaporize.
C Water molecules have a relatively high molecular weight compared to other molecules, so more energy is needed for the water molecules to vaporize.
D Enough heat must be added to water molecules' hydrogen bonds to break the bonds and provide the molecules enough energy to escape the surface..
Answer:
D
Explanation:
Water has a fairly high specific heat, which means that enough heat must be added to it to break the hydrogen bonds between the molecules, allowing them to move freely from each other and escape the water's surface.
how to write a coma with out two independent clauses
Answer:
They can be made into one compound sentence with a semicolon alone between the two independent clauses
Explanation:
you can use a semicolon to separate two ideas (two independent clauses) that are closely related
Give the term for the highest constant temperature
Answer:
It's also called a high temperature, hyperthermia, or pyrexia,
Give two function of the skull
Answer:
Provide protection and structure
Explanation:
Which of these is the most likely prediction that the meteorologist would make about the weather? There is a possibility of
precipitation
hurricane
tornado
fair weather
Answer:
Precipitation or Fair Weather
Explanation:
Of these choices, a meteorologist is most likely to predict precipitation. Hurricanes and tornados are relatively rare occurences.
Please help me please 20 points and ill give brainlyest!
Answer:
The correct answer is b not sure Baka
Which process produces two genetically distant haploid cells
Explanation:
When a haploid cell undergoes mitosis, it produces two genetically identical haploid daughter cells; when a diploid cell undergoes mitosis, it produces two genetically identical diploid daughter cells.
Explanation:
Both haploid and diploid cells can undergoes mitosis. when a haploid cell undergoes mitosis, it produces two genetically identical haploid daughter cells
Can u name one plant whose no part goes waste?
Answer:
mushroom
Explanation:
mushroom
elotes and esquites are made from what type of vegetable?
Answer:
Esquites share the same ingredients with elote fresh corn, mayonnaise, cilantro and chili powder. The combination is sublime
A fossil of a new primate species is discovered. scientists find evidence that members of this species traveled long distances without putting their hands down on the ground and used tools. which trait would the fossil most likely have? a foramen magnum at the back of the skull a curve in the lumbar region of the spine a femur angled outward an opposable big toe
The trait would the fossil most likely have is a curve in the lumber region of the spine.
What is the concept of fossil?Fossils are remains or traces of animals and plants preserved in rocks. Remains are parts of an animal (eg bones, teeth, scales) or plant (eg trunks) and traces are evidence of its existence or activities (eg footprints).
From the fossils it is possible to see the evolutions that the animals suffered in this case it was a curve in the lumber region of the spine.
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Answer:
b. a curve in the lumbar region of the spine
Explanation: