Answer:
Caffeine.
Explanation:
The independent variable for this experiment is the amount of caffeine because there is no effect on the caffeine in the experiment while on the other hand, weight loss is dependent variable which affects due to the amount of caffeine. Independent variable are those which can't depend on any variable in the experiment and can stay independently. There is no effect on the amount of caffeine so we can say that it is an independent variable.
The average speed of an object is the
B.) Distance Traveled by the object divided by the total time elapsed.
What animal is the closest cousin to dolphins. Explain the proof behind this evolutionary connection.
Sharks and dolphins are not closely related, and their comparable body types were not inherited from a single ancestor. Their dorsal fins, flippers, and sleek bodies are the consequence of convergent evolution.
What animal is the closest cousin to dolphins?According to a team of scientists, an extinct deer-like creature the size of a fox or raccoon is more closely related to whales, dolphins, and porpoises than the hippopotamus, which is the assumption made by the public.
You might not be aware of the intimate relationship between dolphins and whales. The zoological group Cetacea is made up of mammals including whales, dolphins, and porpoises.
There are 36 species of dolphin in the Delphinidae family. Because several dolphin family members share the word whale in their common name, it can occasionally be confusing.
Even-toed ungulates like camels and cows are today's closest living cousins of dolphins, with the modest hippopotamus being the next-closest.
Therefore, Sea turtles animal is the closest cousin to dolphins.
Learn more about dolphins here:
https://brainly.com/question/16867595
#SPJ2
The following statement is false. Please correct the statement to make it a true statement.
The retention time of a component can be used to tentatively identify the component, for this reason, this technique is considered a confirmatory lab test.
PLS HELP DUE IN 30 MINUTES
¿Qué opción justifica la inversión económica para realizar las investigaciones espaciales?
Answer:
Incluso una fracción del dinero gastado anualmente en exploración espacial podría salvar a millones de personas en países afectados por la pobreza y mejorar las condiciones de vida de las generaciones futuras. Los cimientos del mundo en el que vivimos se basan en gran medida en la ciencia y, de hecho, es vital ampliar nuestro conocimiento del universo.
a cross between a white horse and a chesnut horse produce all light brown horses
Answer:
Incomplete dominance
Explanation:
- Eijiro <3
Answer:
incorrect.
Explanation:
there is a possibility. but in reality color does not effect the foal.
My Friesians grandfather was an Akhal teke that was gold. He gave birth to all black offspring as you can see in the attachment.
Can someone please explain why food that has been kept at room temperature for a few hours is more likely to cause food poisoning than food that has been kept in the refrigerator?
Answer:
Because food kept at room temperature is somewhat exposed to air, and sometimes, the air can contain dangerous chemicals that were perhaps accidentally released, whereas food in the refrigerator doesn't apply to that problem.
Explanation:
Hope this helps, and please mark as brainlest! :)
Answer:
Because food that has been left out could be exposed to bacteria or get dried out, in the fridge it stays cooler and more fresh
A radioactive material has a half-life of 30 days. You begin with 4 grams of radioactive material.
a. How much of the original is left unchanged after 90 days?
b. After 120 days?
Give explanation. Don't go.ogle.
Answer:
a. 0.5 grams b. 0.25
Explanation:
Just use the half-life formula(I linked it below)
a. 4(1/2)^90/30=1/2
b. 4(1/2)^120/30=1/4
A. 0.5 grams is left unchanged after 90 days.
B. 0.25 grams is left unchanged after 120 days.
What is Half life?The half-life of a radioactive isotope is defined as the time it takes for half of the radioactive isotope to decay. It is stable in specific radioactive isotopes. It is unaffected by circumstances. It is also independent of the initial amount of that isotope.
It can be find out by this formula:-
[tex]N=N_o (1/2)^n\\\\[/tex]
where, N= quantity of the substance remaining
[tex]N_o[/tex]= initial quantity of the substance
n= number of half lives
For above given example,
Given that radioactive element X has a half-life 30 days
Hence the number (n) of half-lives in 90 days
n=90/30
n=3
The amount N of radioactive element X left after n=3 half-lives with initial amount [tex]N_o[/tex]=4 gm
[tex]N=N_o (1/2)^n\\\\\\N= 4 (1/2)^3\\N= 4(1/8)\\N= 0.5 gms\\\\\\[/tex]
For 120 days, n=120/30
so, n= 4
Then,
[tex]N=4(1/2)^4\\N=4(1/16)\\N=0.25 gms[/tex]
Thus, A. 0.5 grams is left unchanged after 90 days.
B. 0.25 grams is left unchanged after 120 days.
Learn more about Half-life, here:
https://brainly.com/question/24710827
#SPJ2
1. For a(n) ecosystem to be healthy, it has to have lots of different kinds of plants and animals. 2. Name four types of ecosystems from those listed in the video. A. B. C. D. 3. Describe what Bill Nye was trying to demonstrate by removing some of the blocks in his tower of blocks. 4. All living things depend on _______________________________. 5. Name at least two species that have gone extinct. (four were shown) 6. The best way to wipe out a species is to _____________________________. 7. The largest ecosystem in the world is ______________, where 2/3 of all species live. 8. List five things you can do to increase biodiversity. A. B. C. D. E. 9. Of the 30,000,000 species on Earth, how many are lost each HOUR? 10. In conclusion, Bill Nye states that "As more and more species disappear, it's harder and harder to keep an ecosystem in balance because we don't know WHAT?
Answer:
4. food, shelter and water
5. Sabre-toothed Cat and Woolly Mammoth
6. food and water resources
7. World Ocean
9. 3 specie
Explanation:
All living things depend on their environment that supply food, shelter and water that is necessary for their survival. Sabre-toothed Cat and Woolly Mammoth are the two species that have gone extinct due to unfavourable environmental condition. The best way to wipe out a species is to remove food and water resources. The largest ecosystem in the world is World Ocean where two third of all species live. Of the 30,000,000 species on Earth, three species are lost each hour. In conclusion, Bill Nye states that "As more and more species disappear, it's harder and harder to keep an ecosystem in balance because every specie in the ecosystem balances other specie.
1. The ecosystem is defined as the relation of plants and animals, which depend on each other and work efficiently with the surrounding. For an ecosystem to be healthy, the diversity of the organisms are necessary and proper availability of resources.
2. The four types of the ecosystem are terrestrial, artificial, lentic, and lotic. Terrestrial refers to the ecosystem on land, artificial ecosystems can be human-made, lentic and lotic are the types of aquatic ecosystems.
3. In the video, Bill Nye was trying to demonstrate that everything depends on its building block and resources.
4. The biotic components of the ecosystem depend on food, shelter, and water.
5. Extinction refers to the complete elimination of an organism due to natural or human-made factors. Examples of extinct animals are the Wolly mammoth and Dinosaurs.
6. The best way to wipe out species is the change of ecosystem or the habitat in which the organism is thriving.
7. The largest ecosystem in the world is the ocean, where the majority of the species are found and some of them are yet to explore.
8. The biodiversity can be increased by increasing vegetation, diversifying the resources, making shelters available, and plenty of water.
9. Each hour approximately 3 species are lost. It can be due to natural calamity or human factors.
10. The preservation of the ecosystem is necessary, and the soon endangering of the species will lead to unbalance of the ecosystem, as species depend on each other.
To know more about ecosystem, refer to the following link:
https://brainly.com/question/1673533
Describe three ways that the growth of suburban populations would have affected land and aquatic ecosystems around cities.
Answer: The three ways the growth of suburban populations( urbanisation) would affect the environment include:
--> Insufficient water availability,
--> Waste-disposal problems, and
--> High energy consumption.
Explanation:
The growth of suburban population is also called URBANISATION. This is defined as the rapid growth of an urban area which occurred due to the movement of individuals from rural areas into the urban area. There are different reasons why individuals migrate to urban areas these include:
--> for a better access to health care services
--> for more education opportunities
--> To combat the problems of unemployment and
--> for better participation in political and social activities.
The three ways the growth of suburban populations( urbanisation) would affect the environment include:
--> Insufficient water availability: the increase in the urban population creates a high demand for water use both for industrial and domestic uses.
--> Waste-disposal problems, and
--> High energy consumption.
Answer:
Deforestation, Water pollution, Introduction of invasive species
Explanation:
For ages, human beings have been altering the natural ecosystems and causing irreparable damages to nature. Development drove to an unmeasurable advance over new unpopulated areas.
Some of the principal human activities responsible for biodiversity loss are
• the uncontrolled use of unrenewable resources,
• overexploitation of renewable resources;
• land destruction for the mining industry, farming and cattle industry, buildings, and other infrastructures;
• the unplanned advance of cities, and opening of new roads to connect those cities.
All of them involving
deforestation and fragmentation of natural landscapes; water, air, and soil pollution, species loss, and reduction of biodiversity. Introduction of invasive species.And the growth of suburban populations is a frequent human activity causing an impact on nature. To mention a few ways in with this action might affect ecosystems, we can name the followings,
Deforestation:
The growth of suburban populations is indefectibly related to deforestation. New open areas are needed for buildings, roads, and service establishments, such as natural gas or water ducts, light, and others. There hardly exists planning about the cities´ growth and conscientious conservation of nature.
Water pollution:
Water is severely polluted while constructing buildings and roads. The wastes of materials used for construction, oil coming from transport and machinery, human wastes, among other sources of contamination reach the rivers or lakes, polluting them and altering the natural equilibrium.
Introduction of invasive species:
It is very common to use ornamental vegetable species, proceeding from other areas or countries to arrange the gardens, streets, and parks. These species might become invasive and uncontrollable, causing severe damage in native endemic species by competing for resources. The whole ecosystem structure changes.
Deforestation, water pollution, and the introduction of invasive species are some of the causes of biodiveristy loss.
I need some ideas for experiments that show the process of evolution by natural selection. if this could be answered asap that would be super helpful!!
Is the trait being tracked in the pedigree a dominant trait or a recessive trait?
Provide specific evidence from the pedigree (in terms of generation and individual’s numbers) and reasoning to support your claim.
Answer:
The trait being tracked is a recessive trait because less people have it.
7 people don't have it and 5 people do.
state the structure of dna
Non living factors in an ecosystem are known as ______________________ factors.
Answer: Abiotic
Explanation:
this is a real question, dont take it out of context GUYS. What is the white sticky stuff called that comes out of that plant that bugs die from if they eat? i also forget the name of the plant smh.
Answer:
Mealybugs will commonly leave a white residue on a plant's leaves that resembles cotton. You will find this residue mostly on the stems and leaves. ... You may also find that the plant has a sticky residue on it. This is honeydew and is secreted by the mealybugs.
Explanation:
Answer: I d k
Explanation:
Should I take biology or physics?
Answer:
bio
Explanation:
Answer:
Do pros and cons for both and then decide
Explanation:
Hey can you please help me with this
please and thank you
11. All plant and animal life on Earth contains what element?
A)sulfur B)carbon C)silicon D)aluminum
Answer:
B.Carbon
I think sorry if it's wrong
Please help with this question
Answer:
Foxes
Explanation:
If there are only a few remaining members of an insect species living in one area, which would most likely cause this species to become extinct?
Answer:
introduction of new predators to the insects.
Answer:
the introduction of new predators to the insects’ environment
Explanation:
what is endocrine system
Answer:
The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.
Economic importance of monera and fungi essay
Answer:
Bacteria are microorganisms and they are useful to us. Bacteria are economically important as these microorganisms are used by humans for many purposes. The beneficial uses of bacteria include the production of traditional foods such as yogurt, cheese, and vinegar. Microbes are also important in agriculture for the compost and fertilizer production. Bacteria are used in genetic engineering and genetic changes.
help anyone need to get this done today???
Write a paragraph about air, land and water pollution.
Answer:
AIR POLLUTION:
This tern is not something new, it has been existing since he time of industrial revolution where in big chimneys are pointed out in the air which releases harmful gases into the atmosphere. This phenomenon has been increasing since then as the industries have been developing simultaneously. Today, air pollutants have shown a great effect on plantations, health and life, decreasing the enjoyment of living, rising medical costs, causes global warming and also causes the destruction of the ozone layer.
One of the major causes of air pollution is the release of carbon di oxide into the atmosphere. This happens because of deforestation and fossil fuel burning. Sulfur dioxide is another main air polluter and is released into the atmosphere by the burning of sulfur containing compounds of fossil fuels. Sulfur dioxide is very harmful for the humans on high concentration and sulfur in the atmosphere is the main cause of acid rains. Chlorofluorocarbons also contribute to air pollution by reducing the ozone layer in the stratosphere. CFC’s are produced by the burning of plastic foam items, leaking refrigerator equipment and spray cans.
WATER POLLUTION:
Contamination of available natural water by industrial wastes and other waste products can be defined as water pollution. Factors causing water pollution can be categorized into two different groups; Point sources and Non- point sources.
Point sources are easy to identify and control. Some point sources of water pollution include waste products from factories, waste from sewage, waste from power plants , waste from underground coal mines and waste from oil wells. They are called point sources because these are the direct sources of water pollution and be reduced and monitoredNon- point sources are ambiguously defined and are much harder to control. The term non -point source encompasses a large range of sources like when rain and snow moves through the ground and picks up major pollutants and mover towards a major body of water, the runoff of fertilizers from farms animals and crop lands, air pollutants getting washed or deposited to earth, and storm water drained from streets parking lots and lawns.
LAND POLLUTION:
The contamination of and with different kinds of wastes is called land pollution. The major causes of land pollution are construction, domestic waste , industrial waste and agriculture.
The rising construction of building takes away the trees that takes away the homes of the animals living there. As there are more and more people inhabiting on our planet, the demand for food increases and the forests are cut down to make farm lands. In addition, Herbicides, pesticides, artificial fertilizers and animal manure are washed into the soil and pollute it. Tons of domestic waste is dumped everyday from homes offices etc. They can be recycled or burnt in incinerators. There are still more waste machinery products such as refrigerators and washing machines that are dumped in landfills simply because they cannot be recycled. Plastic factories, oil refineries, nuclear waste disposals, and large animal farms, all lead to land pollution.
WAYS TO STOP POLLUTION:
We can help to reduce global air pollution and climate change by few ways:
Driving a car that gets at least 35 mpg, walking, biking, and using public transportation, using CFL bulbs over incandescent bulbs, buying only energy efficient appliances, recycling newspaper, aluminum, and others, planting trees, avoid purchasing products that contains CFC’s, supporting much stricter clean air laws and enforcement of international treaties to reduce ozone depletion and slow global warming
pollution.
i need help please and thank you:)))
Answer:
A
Explanation:
Which two major parts of the Earth system does this photo most clearly
show?
O A. Cryosphere
B. Biosphere
C. Atmosphere
D. Geosphere
Answer:
I think its biosphere
Explanation:
Which of the following is true about plants and cellular energy?
A.
Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
B.
Plants use light energy to produce food molecules during cellular respiration and to obtain cellular energy from the bonds of these food molecules during photosynthesis.
C.
Plants can use light energy to produce food molecules or to obtain cellular energy from the bonds of these food molecules during cellular respiration.
D.
Plants can use light energy to produce food molecules or to obtain cellular energy from the bonds of these food molecules during photosynthesis.
Answer:
A.
Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
answer:
A. plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
explanation:
photosynthesis is the process through which plants synthesize food with light energy (photo-)photosynthesis is the process by which organisms, such as green plants, use light energy to produce foodcellular respiration is the process by which living things, including both plants and animals, obtain energy from the bonds of food moleculestherefore, plants use light energy to produce food molecules during photosynthesis, and obtain cellular energy from the bonds of these food molecules during cellular respirationThe tilt of the Earth's axis and it rotation affect weather, because the ________ allows some latitudeds to be heated at a greater rate while Earth ________.
Answer:
Tilting of earth and Earth has four growing season.
Explanation:
The tilting of earth allows some latitudeds to be heated at a greater rate while Earth has four growing season due to this tiltation of earth. If there is no tilting of earth occurs, there will be no seasons. Earth's axis is tilted about 23.5 degrees from the plane of its orbit around the sun which greatly affect the weather of various parts of the earth so we can say that tilt of the Earth's axis and it rotation affect weather around the world.
The real length of one villus is 0.8 mm
Calculate the image length if the villus is viewed at a magnification of 20
Use the equation:
size of image
magnification =
size of real object
[3 marks]
Answer: 16 mm
Explanation:
If I understood the given equation correctly, it could be rewritten as:
size of image = size of real object * magnification
Plug in the given values, and we get
size of image = 0.8 * 20 = 16 (mm)
A coastline will experience _____ when it is aligned in a tidal bulge
Answer:
High tide.
Explanation:
I am not sure, since this is probably a multiple-choice question, but when a coastline is aligned in a tidal bulge, it experiences high tide. I hope this helps (: