There are some species in every ecosystem that are necessary for the other species in the system to survive. The ecosystem may not be able to continue functioning without the keystone species, which could be a small plant or a large predator.
What are keystone species ?
Scientists may argue over which organisms or plants in a given ecosystem should be called a keystone species because a keystone species does not have a formal name. The idea, according to some wildlife scientists, oversimplifies the role of a single animal or plant in intricate food webs and habitats. On the other hand, referring to a specific plant or animal as a "keystone species" in an ecosystem is one way to educate the general public about how crucial one species can be to the continued existence of numerous others.There are three sorts of cornerstone species referred to by numerous researchers: mutualists, ecosystem engineers, and predatorsThe "keystone" is regarded as one of the most crucial components in any community or arrangement. An organism that contributes to the stability of the system is known as a keystone species in any kind of ecosystem, including marine ecosystems. Ecosystems would look very different without its keystone species. If their keystone species vanished, some ecosystems might not be able to adjust to changes in the environment. That could result in the ecosystem's demise or it could allow an invasive species to take control and significantly alter the ecosystem's course.To know more about keystone species check this:
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There was a crisis situation . You have two patients , on have A blood . Both patients are in critical condition blood . You have one pint of A- blood and one pinto which patient and why ? (Hint : which patient is more antigen before or after the transfusion ? ) male and one female who each one needs one pint of would you give to have an exposure to Rh O blood more likely to have an
Answer:
Explanation below
Explanation:
There are different form or type of blood group. These include blood group A, B, AB and O.
The blood group AB is usually known as the universal recipient while the blood group O is the universal donor.
A universal donor can donate blood to all other blood groups, while the Universal recipient can receive blood from all other blood groups.
In this case, two patients, one with blood group A and the other with blood group AB, with only one available group A type pint for transfusion. The best thing to do in this case is to give the blood to group A patient and get any other blood group pint of blood for the group AB patient. This is because the blood group AB patient can receive blood from any of the blood groups.
What are the radioactive elements?
Answer:radium ,radon ,polonium
Explanation:hope this helps []~(￣▽￣)~*
RNA is chemically similar to DNA except that its sugars have an additional oxygen atom,
and the base thymine is replaced by a structurally similar base called
Answer:
Uracil
Explanation:
Uracil is in RNA thymine is in DNA
hat do the following results from the TEST FOR LIFE tab indicate about the sample?
Bacteria have these things:
A. Cell wall, nucleus and cell membrane
B. No membrane bound organelles, cell membrane and cell wall
C. No DNA, cell membrane and no cell wall
D. Have no organelles or DNA
What animals live in the marianna trench?
Answer:
xenophyophores, amphipods and small sea cucumbers (holothurians)
Explanation:
Answer:
The three most common organisms at the bottom of the Mariana Trench are xenophyophores, amphipods and small sea cucumbers (holothurians), Gallo said. The single-celled xenophyophores resemble giant amoebas, and they eat by surrounding and absorbing their food.
Explanation:
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Which is one characteristic that is used to identify types of metamorphic rocks?
color
rock size
grain arrangement
type of rock before metamorphosis
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In addition to liquid precipitation, which are present when freezing rain occurs?
ice pellets
snowflakes
cold surfaces
warm temperatures
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Which describes a condition of the neritic zone?
few organisms
ample sunlight
changing salinity
frigid temperatures
Answer:
I agree with the other answer.
Explanation:
Answer:
ample sunlight
Explanation:
4. Choose the correct list of five major current environmental challenges.
A. Climate change, species loss, environmental degradation, pollution, and environmental justice
B. Climate change, species loss, crime, food shortage, pollution
C. Species loss, crime, water shortages, global cooling, food shortage
D. Environmental degradation, water shortage, environmental justice, food shortage, pollution
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Answer:
The answer is A
Explanation:
A scientist was fishing in a pond and decided to collect a water sample to examine back in the lab.after looking in the microscope he saw a small aquatic organism.the organism appeared to have branchlike appendages coming out of his body.it seemed to be ingesting some smaller organism that appeared to be daphnia (water fleas)which kingdom should this organism be classified in?
A.fungi
B.eubacteria or archaebacteria
C.plant
D.animal
Answer:
The answer would be fungi
BIO MEANS?
WHAT ARE THE TWO TYPES OF CELL
Please fully explain the answer
Answer:
thermal energy to heat our homes; mechanical energy to transport people and things; and electrical energy to power just about every other technology we use.
Explanation:
What impacts would suburban development have on undeveloped deciduous forest and meadow ecosystems?
Answer:
Impacts of suburban development on undeveloped deciduous forest and meadow ecosystems are - : loss of biodiversity , excessive land use , deforestation , degradation of air quality , increase in the amount of greenhouse gases , therefore leading to environmental loss .
Explanation:
SUBURBANIZATION -: Suburbanization is a demographic change, resulting in the creation of (sub)urban sprawl, from core urban areas to suburbs. Low-density, peripheral urban areas are increasing as a consequence of the migration of households and companies out of the city centers. (Urbanization, which signifies a demographic change from rural areas to urban centres, is inversely related to suburbanization.)
Within the central urban area, many residents of metropolitan regions work and prefer to live in satellite communities called suburbs and commute to work by car or mass transit. Others have taken advantage of advances in technology to operate from their homes.
Environmental Implications -: This can have negative effects on the community with the growth of suburbanization and the spread of individuals living outside the city. Suburbanization has been related to an increase in the mileage of automobiles, an increase in land usage, and an increase in the use of residential electricity. These suburbanization factors then induced air quality deterioration, increased use of natural resources such as water and oil, and increased quantities of greenhouse gases. This causes increased use of oil and gas as well as an increase in pollution as the use of cars to drive to and from the workplace grows. This will then cause air pollution and degrade the air quality of a region with a rise in emissions from vehicles. Suburbanization is increasing, leading to an increase in housing growth, which causes the consumption of land and land available to increase.
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Which of the following is an advantage of aquaculture expansion?
1. Highly efficient
II. Uses less water
III. Uses less fuel
IV. Prevents disease
I and II only
Ob
I and III only
C
I, II, and III
Od
HI, III, IV
Answer:
1, 2 and 3. it's efficeint and uses less water and less fuel but a downside of aquaculture is that disease spreads fast, not slow.
Explanation:
i just turned in the assignment and it's right. check the assigned reading it says the answer
The advantage of aquaculture expansion is that this technique uses less fuel (Option III).
Aquaculture refers to the techniques involved in obtaining aquatic organisms in a controlled aquatic environment.The aquaculture techniques include, among others, breeding, rearing, and harvesting fish and algae.The main classes of aquaculture techniques may be divided into marine aquaculture and freshwater aquaculture.In conclusion, the advantage of aquaculture expansion is that this technique uses less fuel (Option III).
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The organism shown is a free-living one that is anchored to the
bottom of ponds and streams during one stage of its life cycle.
What is the common name of the group to which this organism
belongs?
O cnidarians
O rotifers
O bryozoans
O mollusks
Answer:
Cnidarians
Explanation:
The organism describes sounds like a hydra, which is a genus of organisms that belongs to the phylum cnidaria. These organisms are tubular organisms with tentacles surrounding their mouths
Which is the energy source used to fuel photosynthesis?
Answer:
Sunlight
Explanation:
Sunlight
the rain shadow effect is caused by
Which phrase best defines topography?
The art or practice of graphic delineation in detail usually on maps or charts of natural and man-made features of a place or region especially in a way to show their relative positions and elevations.
Anna stated that carbon monoxide could not be organic because it is a gas. what is wrong with her statement?
A.) her statement is correct.
B.) Organic molecules can be gases.
C.) carbon monoxide is not a gas.
D.) Carbon monoxide is not organic because it is not produced by living things.
Answer:
from my point of view the answer should be carbon monoxide is not organic because it is not produced by living things the answer should be D
What is the ozone layer?
A. thin layer in the lower atmosphere that protects Earth from ultraviolet rays
B. thin layer in the upper atmosphere that protects Earth from ultraviolet rays
C. thin layer in the upper atmosphere that protects Earth from supersonic rays
D. thin layer in the lower atmosphere that protects Earth from supersonic rays
Answer:
B. thin layer in the upper atmosphere that protects Earth from ultraviolet rays
Which part of the microscope is used to make small adjustments in the image of an object?
A)Eyepiece
B)Fine Adjustment
C)Coarse Adjustment
D)Objective lens
Answer:
The part of the microscope that is used to make small adjustments in the image of an object is the fine adjustment.
Explanation:
In the optical microscope, the fine adjustment knob allows precise focusing of the sample being studied. This means making minimal adjustments in order to better observe the microscopic image.
After the initial focusing with the coarse adjustment knob, with the fine adjustment it is possible to highlight the details that require more attention, as well as the refringency of the sample, if it exists.
The other options are not correct because:
A. Eyepiece is the lens that receives the image from the objective lens, that has contact with the eyes of the observer.
C. Coarse Adjustment is the rough magnification, used for the initial approximation of the image.
D. Objective lens enlarges and defines the image of the sample on the slide.
In the model of the cycle of energy above, what is job of the sun?
Answer:
the job of the sun is to give light and energy to plants for photosynthesis which plants turn the light energy to chemical energy then give the chemical energy to animals and then it starts all over again and again.
Explanation:
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What molecule is represented by the molecular model shown below?
O Glucose
O Adenosine triphosphate (ATP)
O Adenosine diphosphate (ADP)
O Starch
Answer:
Adenosine diphosphate (ADP)
Explanation:
because i know
When moving up the staircase, which direction will you be moving the decimal? (Metric system work)
Which of the following muscles can you control:
Biceps
Quadriceps
Deltoids
All of the above
Answer:
A. Biceps
Explanation:
Biceps, are voluntary muscles, which means that you can control them.
Quadriceps and Deltoids are both involuntary muscles, so they're controlled by your nerve impulses
Thus the answer, being Biceps
Explain any one method of crop production which ensures high yield?
One of the first organisms to develop a new ecosystem is
Answer:
Moss lichen or any other pioneer species.
During winter vacation, you learn that a polar jet stream is traveling across the United States. The forecaster says there will be big changes in the
weather as the jet stream moves past your town in Florida
What causes wind? Choose the two that apply.
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A
uneven heating of Earth's surface
B В
warm air sinking while cold air rises
C
air movement from high to low pressure
D
air movement from low to high pressure
Explanation:
uneven heating of Earth's surface. warm air sinking while cold air rises
Does anyone know all the answers?????
The difference between an exergonic and endergonic reaction is that and exergonic reaction results in a decrease in mass while and endergonic reaction results in an increase in mass.
Explanation:
A good was to remember the different reactions is the ex- means out and en- means in. Exergonic reactions release energy and endergonic reactions take energy in.
Which of these is not a characteristic of all living things?
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Explanation:
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