Surface water (rivers and lakes) are the most available source of fresh water. The other sources of fresh water are largely unavailable.
Water on earth could be fresh water or salt water. The difference between the two is that freshwater is not salty. There is a limited quantity of available freshwater on earth.
Fresh water is found in glaciers, surface lakes and rivers and groundwater.The order of decreasing availability of fresh water on earth is ice> Groundwater > lakes and rivers (surface water).
Unfortunately, the source of freshwater that can easily be obtained for human use is surface water (lakes and rivers). There is only about [tex]1\frac{2}{3}[/tex]% available freshwater in rivers and lakes. About 87% of the world's fresh water supply is locked away in glaciers.
Given the limited availability of fresh water sources, the possibility of an water challenges in the world can not be over emphasized. Definitely, there may not be enough water in the future hence water conservation efforts must be taken seriously.
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Explain how a rise in temperature may increase the rate of an enzyme controlled reaction
Answer:An increase in temperature increases kinetic energy of particles, so collision frequency increases and more enzyme-substrate complexes are formed, therefore rate of reaction increases.
Explanation: i no it
Looking for input and other opinions with the following statement. 'environmental factors influence the rate of natural selection." I am to make a claim on whether I agree or not and why. I agree with the statement. This is because all literature states that with natural selection it's basically the best man/woman wins. I feel that with that statement it directly refers to the environment if food is scarce then the best hunter the best runner is going to get the food first if the weather is changing and it's time to move on or hibernate then the one with the best intuitions will move on or assume hibernation and wont be left to the cold as well as if they are the prey to something else as everything is the best one to keep alert and observant to their surrounding would be the one to survive longer. Although I think that the only downfall to that would be if something happened and the appearance was to change and made them less desirable in that manner but then would in turn help themselves to camouflage to hide better.
I agree completely.
Environmental factors control evolution through surivial of the fittest, or natural selection. This is not nearly as much the case with humans as wild animals, or early on humans, but it does still come into play. For example, lactose intolerance was erradicated in areas where milk was a primary source of nutrients during a famine. The famine was environmental, causing natural selection to elimate lactose intolerant people in the area.
A more basic example is fur color of certain animals. They were selected by their environment to survive and pass on their genetics, causing the species to evolve.
Pls help me i only know the answer but I don’t know how to explain it.
Answer:
just explain
Explanation:
just do it
12. What is true of a chemical change?
A.
C.
They do not create new substances
It cannot be seen on the molecular
level
B.
It cannot be smelled
D.
The do create new substances
Answer:
D
Explanation:
many chemical changes can be smelled, or heard, etc. And can be seen on a molecular level. Chemical changes create new substances:
Na + Cl = NaCl
5 organelle cells not found in human cells
Hurry homework due in couple minutes
Answer:
Not every cell in the human body contains DNA bundled in a cell nucleus. Specifically, mature red blood cells and cornified cells in the skin, hair, and nails contain no nucleus. Mature hair cells do not contain any nuclear DNA. ... As part of the maturation process, human red blood cells destroy their cell nuclei.
This means they have no mitochondria, Golgi apparatus, or endoplasmic reticulum. They also lack a membrane-bound nucleus, although they do have genetic material located in a nucleoid region. Prokaryotic cells are surrounded by a plasma membrane, and some types of bacteria have cell walls as well.
Nucleolus. Within the nucleus is a small subspace known as the nucleolus. It is not bound by a membrane, so it is not an organelle. This space forms near the part of DNA with instructions for making ribosomes, the molecules responsible for making proteins.
Explanation:
if a red plant is crossed with a white plant and the offspring is pink, what is it called ?
Answer:
Incomplete dominance is an example of a non-mendelian trait (doesn't follow the genetic rules established by Gregor Mendel). When two parents mate and produce offspring, the offspring is a blend of the two parents. So, a red flower and a white flower would make a pink flower.
which planet is blue-green in colour?
Answer:
Uranus
Explanation:
The blue-green color results from the absorption of red light by methane gas in Uranus' deep, cold and remarkably clear atmosphere.
what do you think will happen when i put a leaf discs saturated with a sodium bicarbonate solution and put it under a lamp ? will it sink or float and why ? can someone help me rq will give 30 points
Answer:
the leaf disk should float because bicarbonate is the source of its oxygen for photosynthesis and it releases oxygen into the interior of the disk causing it to float.
Explanation:
The thing which would happen if leaf discs are saturated with a sodium bicarbonate solution and put under a lamp is:
The leaf disk would floatAccording to the given question, we can see that there is an experiment which is taking place as a leaf disc is placed in a solution of sodium bicarbonate under a lamp.
As a result of this, we can see that the source of oxygen for the leaf disk is the bicarbonate and when the chlorophyll in the plant reaches out to the lamp for photosynthesis, it would make the leaf disk to float.
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HURRRRRRRRRRRRRYYYYYYYYYYYYYYYYYYYYYYYYYYYY
Answer:
the answer would be 3 and 4 hope this helps please mark me as brainlyist if right
Explanation:
What is a nonrenewable resource?(1 point)
a resource that is in limited supply
a resource that is used for energy
a resource that harms the environment when it is used
a resource that can replace itself quickly
Are all rocks made up of one mineral?(1 point)
No. If it contains more minerals, however, then it is not useful to people.
Yes. If it contains more minerals, then it would lose its orderly internal structure.
No. Some rocks may contain several minerals.
Yes. If it contains more minerals, then it is an ore.
Coal is a very useful rock that formed over millions of years from the remains of plants. Is coal a mineral?(1 point)
No, coal is not a mineral because coal is made of dead plants.
No, coal is not a mineral because coal can be burned to produce electricity and heat.
Yes, coal is a mineral because all rocks that are useful to people are minerals.
Yes, coal is a mineral because all rocks are nonliving solid minerals.
Which is a positive aspect of fossil fuels?(1 point)
They are ecologically friendly.
.
They can be recycled and reused.
They provide energy for cars, trains, and heat.
They do not need processing to produce energy.
Which is a negative aspect of fossil fuels?(1 point)
They take a long time to produce energy.
They are difficult to find.
They cause pollution on Earth.
They are difficult to transport.
Which is a disadvantage of solar power?(1 point)
It requires turbines.
It can be harmful to wildlife.
It requires burning fuel, which causes air pollution.
It can only be used where there is lots of sunlight.
Which is a thick, sticky, tar-like deposit of bitumen mixed into sandy sediment?(1 point)
shale
sandstone
oil sand
coal
Which statement best explains an environmental outcome of using fossil fuels for energy?(1 point)
When fossil fuels are burned, hazardous ash is created and carried through the environment by wind and dropped into nearby lakes and ponds.
Fossils fuels produce waste that exposes humans to dangerous levels of radiation.
When fossil fuels are burned, they release toxic gases into the air that cause pollution and increase global warming.
Fossil fuels release carbon dioxide which plants use to make food.
Why is soil considered a vital resource?(1 point)
It is hard to destroy and easy to make.
It provides the source of material for different landforms.
It plays a variety of roles for plants and animals.
It is the place where all nutrients on Earth are stored.
Which describes a renewable energy resource?(1 point)
It is more prone to serious accidents.
It is less expensive than fossil fuels.
It produces less pollutants than fossil fuels.
It consists of carbon and hydrogen molecules.
Use the scenario to answer the question.
Edwin buys a water bottle, reuses it twice, and then recycles it. Eleanor buys a water bottle, reuses it twelve times, and then throws it away.
Which energy cost would apply to Edwin, but not to Eleanor?
(1 point)
the cost of transporting the bottle away from the house
the cost of processing the bottle after it was no longer used
the cost of producing the original bottle
the cost of transporting the bottle to the store
Your class goes on a field trip to observe drilling machinery. The geologists at the drill site show you displays of drilled rocks to compare different types of drills and methods. The drilled holes in one rock display are significantly larger than the holes drilled in the display next to it. Given this information, which statement is correct? (1 point)
The rock display with larger holes shows petroleum drilling, which is deep underground.
The rock display with smaller holes shows petroleum drilling, which is closer to the surface.
The rock display with smaller holes shows copper drilling, which is deep underground.
The rock display with larger holes shows copper drilling, which is closer to the surface.
Answer:1).A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource.
2)Rocks are made of minerals, like quartz, calcite, feldspars, and micas. Most rocks are made from more than one mineral, but there are quite a few kinds that are made from only one mineral. Minerals are not rocks, rocks are made of minerals.
3)Coal is a very useful rock that formed over millions of years from the ... No, coal is not a mineral because coal is made of dead plants.
4)The relatively cheap cost of fossil fuels is a major positive aspect. They are in abundant supply, which makes them inexpensive to drill or mine for. In particular, coal is one of the most widely available fossil fuels.
5)High initial costs for material and installation and long ROI (however, with the reduction in the cost of solar over the last 10 years, solar is becoming more cost feasible every day) Needs lots of space as efficiency is not 100% yet. No solar power at night so there is a need for a large battery bank.
6)Asphalt, also known as bitumen is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or it may not.
7)When fossil fuels are burned, they release toxic gases into the air that cause pollution and increase global warming.
8)The soil considered an important resources because : It provides food through agriculture. It is the source of nutrients for many forms of life. Many valuable minerals are explored from the soil.
9)Renewable resources are an energy source that cannot be depleted and are able to supply a continuous source of clean energy.
10)the cost of processing the bottle after it was no longer used
11)The rock display with smaller holes shows copper drilling, which is deep underground.
Explanation:
Those resources which can not be made again is called nonrenewable resource.
According to the question,
A resource that is in limited supply is nonrenewable resources.A resource that is used for energy is a renewable resource. For example - sunlight.A resource that harms the environment when it is used, might be both renewable and nonrenewable resources.A resource that can replace itself quickly is renewable resources. Asphalt, also known as bitumen is sticky, it is present in all rock7When fossil fuels are burned, they release toxic gases into the air that cause pollution and increase global warming. The soil considered an important resource because It provides food through agriculture. It is the source of nutrients for many forms of life. Many valuable minerals are explored from the soil. Renewable resources are energy sources that cannot be depleted and are able to supply a continuous source of clean energy. The cost of processing the bottle after it was no longer used The rock display with smaller holes shows copper drilling, which is deep underground.For more information, refer to the link:-
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Consider the following bones: femur, humerus, sternum, scapula, and rib. Which of these bones are flat?
Answer:
The ribs
Explanation:
The long ones are big and the flat bones like the ribs are mostly curved
What is the first step in the scientific
method?
A. making an observation
B. developing a hypothesis
C. creating an experiment
D. writing a theory
Answer:
b. developing a hypothesis
A student observes a cell under a microscope. She sees a cell wall and a nucleus. What type of cell is she observing?
O eukaryotic animal cell
O eukaryotic plant cell
O prokaryotic cell
O bacterial cell
Answer:
eukaryotic plant cell
hope this helps
Only eukaryotic plant cells have a cell wall and a nucleus. Option 2 is correct.
Eukaryotic cells are cells that have a nucleus and other membrane-bound organelles. Prokaryotic cells do not have a nucleus or other membrane-bound organelles.
Plant cells are eukaryotic cells that have a cell wall. The cell wall is a rigid structure that surrounds the cell membrane. It provides support and protection for the cell. Animal cells do not have a cell wall.
The nucleus is the control center of the cell. It contains the DNA, which is the genetic material of the cell. The nucleus also contains proteins that control the activities of the cell.
So, if a student observes a cell under a microscope and sees a cell wall and a nucleus, she is observing a eukaryotic plant cell.
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which of the following pairs of populations is most likely to increase and decrease in similar pattern to wolves and moose?
Answer:
moose?
Explanation:
so sorry if it's wrong
Animals and plants have certain features which make them to survive in a particular habitat. This is called(a) adaptation (b) speciation (c) specialisation (d) evolution
Answer:
Adaptation
Explanation:
The presence of specific features, which enable a plant or an animal to live in a particular habitat, is called adaptation.
when animals adapted environment they can survive
hope it helps
Does ATPsynthase store energy or release it?
Answer:
(Hope this helps can I pls have brainlist (crown)☺️)
Explanation:
ATP synthase is a protein that catalyses the conversion of adenosine diphosphate (ADP) and inorganic phosphate to the energy storage molecule adenosine triphosphate (ATP) (Pi). It's classed as a ligase since it modifies ADP by forming a P-O bond (phosphodiester bond).
Cells store energy in the form of ATP. These storage molecules are made in the mitochondria, which are small organelles present in eukaryotic cells and are commonly referred to as the cell's "powerhouse."
The structure that carries urine into the renal pelvis
A. Loop of henle
B. Collecting duct
C. Renal cortex
D. Renal vein
Answer:
collecting duct
Explanation:
The last part of a long, twisting tube that collects urine from the nephrons (cellular structures in the kidney that filter blood and form urine) and moves it into the renal pelvis and ureters.
I hope this is correct the other ones didn't quite match up.
state the meaning of horizontal growth of a tree
5.202/0.45
please explain out how to get the answer
Answer:
use a calculator I'm a genius
Explanation:
do you mean you don't know how to figure out the question? or you don't know how to divide decimals
Answer:
11.56
Explanation:
___11.56
450 | 5202.00
-450
702
-450
2520
-2250
2700
-2700
0
The image shows a vehicle that can help manage resources sustainably.
What is one disadvantage of using this kind of vehicle?
HYBRID
A. It is more environmentally friendly than gasoline-powered vehicles.
B. It can cost more than gasoline-powered vehicles.
c. It emits more greenhouse gases than gasoline-powered vehicles.
O D. It uses up more fossil fuels than gasoline-powered vehicles.
Answer: B
I chose B because hybrid vehicles tend to be more expensive than their gasoline-powered counterparts. I determined that A is an advantage and not a disadvantage, and I determined that C and D don't make sense if the vehicle can manage resources sustainably.
nguyên lí hoạt động của hệ vận động
Answer:
I can't understand the language text in English and with your language name I reply that
Explanation:
Wind turbines work on a very simple priciple: the wind turns the blades, which causes the axis to rotate, which is attached to a generator, which produces DC electricity, which is then converted to AC via an inverter that can be passed on to power your home.
Respond to the following based on your reading.
1. Name the three common states of matter on earth.
2. Which states of matter have a set shape? Explain why this is, based on the
а
animations you observed for the different states of matter.
3. Which states of matter have a set volume? Explain why this is, based on the
animations you observed for the different states of matter.
4. The boiling point is the temperature at which a liquid substance will turn to
vapor, and also the temperature at which vapor will condense to a liquid. The
a
boiling point of ethanol is about 80°C, and the boiling point of water is about
100°C.
a. What can you conclude about the intermolecular forces in water and
ethanol?
b. Do you predict water freezes at a higher temperature or at a lower
temperature than ethanol?
5. Recall how different Van der Waals attractions and how ionic charges changed
the movement of atoms in the animation. Do you think that Van der Waals
attractions or ionic charges are stronger? Why?
Answer:
Most people are familiar with three states of matter – solids, liquids and gases – but there are two more that are less commonly known but just as important – plasmas and Bose-Einstein condensates. They are very compressible (particles are widely spaced). There are three states of matter: solid; liquid and gas. They have different properties, which can be explained by looking at the arrangement of their particles.
atoms
An atom is the smallest particle of an element, having the same chemical properties as the bulk element. The first accurate theory explaining the nature of matter was Dalton's Atomic Theory: 1. All matter is composed of atoms, and atoms are indivisible and indestructible.
What are the 8 states of matter?
Bose–Einstein condensate.
Fermionic condensate.
Degenerate matter.
Quantum Hall.
Rydberg matter.
Rydberg polaron.
Strange matter.
Superfluid
Answer:
1. Liquid, Solid, Gas
2. Solid has a set shape. Solid can move but gas and liquid is more flexible than solid.
3. Solid has a fixed volume while liquid and gas takes the volume of its container. Solid stays in one place while gas and liquid are flexible.
4. A. The stronger the intermolecular forces in a liquid the higher the boiling point. Therefore, water has a stronger intermolecular force than ethanol.
B. Water molecules are more attracted to each other than ethanol (alcohol) molecules, because water has more hydrogen atoms bonded to oxygen. ... So, that's why alcohol has a much lower freezing point
5. Ionic charges are stronger.
Covalent bonds are known to have the strongest and most stable bonds since they go deep and into the inter-molecular state. A diamond is an example of a compound with this characteristic bond.
Ionic bonds are the next strongest molecular bond following covalent bonds. This is due to the protons and electrons causing an electro-static force which results to the strong bonds. An example would be Sodium Chloride (NaCl), which when separated is Na⁺ and Cl⁻.
Van der Waals forces, also known as Dispersion forces, are the weakest type of molecular bonds. They are only formed through residual molecular attractions when molecules pass by each other. It doesn't even last long due to the uneven electron dispersion. It can be made stronger by adding more electrons in the molecule. This kind of molecular bonds appear in non-polar molecules such as carbon dioxide.
Explanation:
These are the answers based on the reading material provided by James Madison High School
Describe how an enzyme speeds up a chemical reaction within a cell. (written answer)
Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
9. Since the aphotic zone does not receive enough sunlight for photosynthesis, plankton are not present.
What is basis of the food chain here?
Answer:
The answer is detritus.
Explanation:
What was the health of the ecosystem of Atlas National Park like before wolves were reintroduced?
Answer:
The reintroduction of wolves led to a trophic cascade that increased the biodiversity of woody species by controlling the elk population. It also increased the health of riparian zones, subsequently increasing the biodiversity of the birds and mammals that live there.
why organisms need specialised cells and tissues in order to survive
Multicellular organisms require cells to perform various functions and collaborate to maintain a balance in the system known as homeostasis. As a result, specialized structures become specialized for specific functions.
What is cell specialization?Cell specialization, also recognized as cell differentiation, is the methodology by which formulaic cells transform into specific cells that perform specific functions within the body.
Cell specialization is especially important during embryonic development.
Cell specialization allows multicellular organisms to express fewer genes in individual cells, protecting genes from mutagen damage.
Cell specialization occurs primarily during embryonic development as a result of cell signaling of cytoplasmic determinants.
Adult stem cells become specialized to various types of stem cells primarily due to gene expression regulation.
Cells in multicellular organisms must perform a variety of functions and collaborate to maintain a balance in the system known as homeostasis. As a result, specialized structures evolve to perform specific functions.
Thus, the organisms need specialized cells and tissues in order to survive.
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You have a friend who became stranded in a blizzard without food for
several weeks. This friend, when rescued, had lost about 7 kg (about 15
Ibs). As he was quite healthy to begin with, he assumed the weight he
lost was stored fat, but he wondered where the fat had gone, How did
the fat leave his body?
The fat didn't really leave his body. Fat was converted to glucose in the gluconeogenesis pathway to give him energy during the period of starvation.
Fat is stored in the body in the adipose tissue. Fat plays so many roles in the body such as;
Protection of vital organsInsulating the body from coldServing as an energy storeIn times of starvation, fact could also be broken down to release energy. This occurs when fat is broken down to glycerol and fatty acids. When this occurs, glycerol goes to the liver where it is converted to glucose in the gluconeogenesis pathway. This helps to produce energy in times of starvation thereby depleting the body's fat reserve.
As this process occurs, the fat reserve in my friend's body kept going down resulting in his loss of about 15 Ibs of weight.
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main disadvantages of rejoining Paris agreement
Your answer is → There are no repercussions for countries who fail to meet their targets. Without legal ramifications, some countries see their pledges as meaningless, and, therefore, do not prioritise a reduction in carbon emissions
Which two body systems work closely together to make sure your body remains in a stable condition
The Circulatory system helps in providing impure blood to heart and taking pure blood to cells with hemoglobin.
The respiratory system handles the coming of oxygen to body and out of carbon dioxide from body
What is the process X?
Answer:
digestion
Explanation:
since digestion is the breaking down of food particles to smaller sized molecules