Answer:
According to the sliding filament theory, the myosin (thick) filaments of muscle fibers slide past the actin (thin) filaments during muscle contraction, while the two groups of filaments remain at relatively constant length.
Explanation:
The sarcoplasmic reticulum stimulated to release calcium ions.
Calcium ions bind to troponin. ...
Cross bridges (on myosin) pull on actin (power stroke) ...
Cross bridge detaches from binding sites on actin.
Muscle fiber lengthens & relaxes.
Calcium ions actively pumped back into sarcoplasmic reticul
Are there any species that you know of that are now extinct? How might the world be different if they still existed on Earth?
Answer:
the pinta giant tortoise
the ecosystem would be healthier in the area they come from
Explanation:
giant tortoises perform many critical roles in shaping healthy ecosystems, such as dispersing seeds of native plants and creating open pathways where other animals and plants can thrive.
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PLEASE ANSWER ASAP A certain plant tissue, typically found in the stem and in the hard outer covering of seeds, contains very thick, rigid cells. Which of the following correctly identifies this tissue and its function?
A. meristem tissue; gamete formation
B. dermal tissue; structural support
C. ground tissue; production of sugar
D. vascular tissue, transportation of materials
Answer:
ground tissue;production of sugar
Dylan wants to observe some onion cells with a microscope. He places the cells on a slide. Describe how Dylan uses the microscope so he can see the cells with a ×20 objective lens.
Answer:
See the answer below
Explanation:
After routinely cleaning the microscope and ensuring that all the parts are working fine, Dylan would have to place the slide on the stage of the microscope, switch on the light source, and adjust the diaphragm of the condenser to ensure that adequate light gets to the slide on the stage.
Thereafter, Dylan would need to turn the revolving nosepiece in order to shift to the lowest objective of the microscope assuming it is not already in place. Then, the slide on the stage is brought into focus (by viewing through the eyepiece/ocular) by using the coarse/fine adjustment knob to bring the stage up/down.
Once the slide is brought into clear focus, the revolving nosepiece is then turned to switch the x20 objective. Generally, at higher objectives, the coarse adjustment knob is rarely needed and the fine adjustment knob is solely used instead to bring the slide back into focus. Thus, Dylan can see the cells of the onion at the desired objective.
Answer:
i dont know
Explanation:
yeah
Which statement best describes the relationship between the nervous system and the muscular system?
PLEASE HELP DUE IN 5 MIN!!!
The materials of the crust have less mass than materials deeper in the earth.
True
False
A _______ is a tool which is used to separate light into the different colors of the spectrum.
Describe the difference in pressure against your cheeks when they are full of air versus When You released it
Answer: When they were full of air, then the Pressure was the Highest 'cause of the larger force under the specified area as compared to when we released it. We decreased the area of our cheek, so pressure increased and air flows from the cheek (area of high pressure) to the atmosphere
Explanation:
Directions Rearrange the words to make a meaningful sentence. Write your
answer on a separate sheet of paper.
stationary objects.
Static friction
occurs in
a self-regulating force.
frictional force is
The static
2.
Answer: im just doing challenges
Explanation:
Source: "trust me"
Static frictional force is the minimum force that must be overcome for one object to slide over another.
What is frictional force?Frictional force is the force the acts between the surfaces of two objects in contact which oppose the motion of one object over the other.
The minimum force that must be overcome for one object to slide over another is known as static frictional force.
If the applied force is greater than static frictional force, the object will start moving over the other.
Therefore, static frictional force is the minimum force that must be overcome for one object to slide over another.
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Why solid melt when heated
Answer:
When a solid is heated the particles gain energy and start to vibrate faster and faster. Further heating provides more energy until the particles start to break free of the structure. Although the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid.
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what is combustion? What is the equation for the combustion of methane
Answer:
Its the process of burning!
CH4+O2>>CO+H2+H20
Explanation:
Please answer as soon as you can
Answer:
Differences in air temperature cause movement in the air, which creates pressure.
The radiant energy from the Sun is transferred to the atmosphere, causing air movement. The air becomes less dense, so it rises.
As the air falls, it becomes more dense and cools to Earth’s surface.
The higher the latitude, the colder the climate; the lower the latitude, the hotter the climate.
A cell uses a molecule to transfer energy from the chemical reactions of cellular respiration to other chemical reactions within the cell. Which molecule fulfills the role of a short-term energy transfer molecule?
Answer:
ATP
Explanation:
This fulfils the role of short term energy transfer molecule
Answer:
a)
Explanation:
ATP is the answer of this question
QUICK I NEEE HELP !!!
Answer:
All cells come from existing cells
Explanation:
only answer that is part of the cell theory as far as i know
If blending inheritance explained
how flowers inherit traits, would
you expect to see more flower
colors? Explain your answer.
All animals need food, water, shelter, and space to live. which of these is difficult to find in a grassland habitat?
According to the scenario, it is difficult to find shelter in a grassland habitat. This is because grassland habitat generally consists of small grasses with a lack of space between them.
What is Habitat?Habitat may be defined as a type of natural environment for which a particular species is best adapted due to natural selection. It may also be characterized as the area where the basic demands of an organism are fulfilled like food, water, space, mating partner, etc.
Grasslands habitats are generally open and continuous, fairly flat areas of grass. They are often located between temperate forests at high latitudes and deserts at subtropical latitudes. In these habitats, the availability of shelter is very low because of an abundance of small grasses across the area which is insufficient to build a shelter.
Therefore, it is difficult to find shelter in a grassland habitat. This is because grassland habitat generally consists of small grasses with a lack of space between them.
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Conflict resolution
why are onion cells yellow?
Answer:
I believe they are actually white but onions can be yellow when they are old or when they turn bad
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer:
B. Evidence from rock layers, fossils, and ice cores.
Explanation:
Right i believe
Answer:
Its the 4th one. I think. Its the 2nd or third but can't tell for sure. When I searched it, the result came as followed: "Plate tectonics shift the continents, raise mountains and move the ocean floor." So yeah. Hope this somewhat helps.
Explanation:
I really need help, like asap
Answer:
7. C
Explanation:
The more above is the layer, the more recent it is. So the bird lived after 'cause it was in a layer above.
Which statement describes a negative consequence of humans’ use of excess water?
answer:
it increases runoff, which carries fertilizers
explanation:
ignore what i've said before, however please provide the full question loli found this online so it was already answeredcredits: online sourceA pattern of reproduction and growth in a one- celled organism is shown below. Nucleus Which statement best describes this pattern of reproduction? a) All genetic material comes from one parent. b) Only some of the genetic material comes from one parent. The size of the parent determines the amount of genetic material. d) The size of the parent determines the source of the genetic material.
Can anyone help me fast with my homework??
Answer:
A pH scale measures how acidic or basic a substance is.
Explanation:
The pH measures the H+ concentration in a substance. The more lower the pH, the more acidic the substance, the higher the pH, the more basic the substance. It measures from 0-14, with 7 being neutral. Anything less than 7, acidic. Anything above 7, basic.
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The amount of Cytosine plus Guanine is 40%. What would be the amount of Adenine?
Answer:
30%
Explanation:
Considering that the amount of Cytosine added to the amount of Guanine is 40%, that explains that Cytosine and Guanine each equal to 20%.
Cytosine: 20%Guanine: 20%Now, the remaining bit is 60%. Since Adenine and Thymine both equal the same, that would mean: 60/2 = 30.
Adenine: 30%Thymine: 30%Cytosine and Guanine pair together and will always be equal to one another. The same goes for Adenine and Thymine. (A=T, C=G)
Always remember that you want it to total up to 100% at the end.
In the Northern Hemisphere, choose ALL that apply
Fall and Spring Equinoxes occur when days and nights are equal in length.
Summer solstice occurs when the Earth's North Pole is tilted toward the sun.
Winter solstice occurs when the Earth's North Pole is tilted away from the sun.
The tilt and revolution of the Earth causes the seasons
answer: Summer solstice occurs when the earth NORTH POLE is tilted in longest day.
Winter solstice occurs when the earth North pole is tilted shortest day
Explanation: took the test got an A
According to the Northern Hemisphere, all the statements given are exactly true.
What is the Northern hemisphere?It is one-half of the earth that is located in the north of the equator. It has about 90 percent of the world's population and most of the world's land.
Equinox means the duration of day and night are equal in length. There are two equinoxes in a year when the sun moves across the celestial equator, which lies directly above the earth's equator. The summer solstice occurs when the earth's pole is tilted towards the sun and receives more sunlight in the northern hemisphere. Winter solstice occurs when the earth's north pole is tilted away from the sun and receives less sunlight. Overall, the tilting and revolution of the earth is the main reason for the causation of different seasons.
Therefore, all the given statements are true with respect to the northern hemisphere.
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Argentine ants are invasive ants found in California. They’re aggressive in nature and have a tendency to protect crop pests. In urban areas, Argentine ants don’t have many predators. Argentine ants and the native ant species were observed competing for nutrients in a particular ecosystem. What is a likely outcome of this competition? A. an increased number of Argentine ants B. an increased number of native ants C. no dependence between the populations of the two ant species D. an equal number of Argentine and native ants
Answer:
The answer is C.
Explanation:
No dependence between the populations of the two ant species.
3(i). What is cataloguing?
In biology
To prepare for a crisis, you should consider
doing background checks on all your employees
O bringing in someone from your state restaurant association or an expert in the field to do training with your employees
0 making friends with the members of the media
consulting with an attorney
To prepare for a crisis, it is essential to take proactive measures and consider various strategies.
Create a comprehensive plan that outlines the steps to be taken in the event of a crisis. This plan should include roles and responsibilities, communication protocols, and strategies for mitigating and resolving the crisis.
Identify potential risks and vulnerabilities specific to your business. This can involve assessing internal processes, external factors, and industry-specific challenges. Understanding potential crises can help you prepare and minimize their impact.
Provide regular training sessions to your employees on crisis management and response. Educate them about potential crises they may face, proper protocols to follow, and how to handle challenging situations. Consider bringing in experts or professionals in the field to provide specialized training.
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What is the importance of forest to the stability of ecosystems and why does deforestation still take place despite the negative impacts?
Answer:
Deforestation not only removes vegetation that is important for removing carbon dioxide from the air, but the act of clearing the forests also produces greenhouse gas emissions. The Food and Agriculture Organization of the United Nations says that deforestation is the second-leading cause of climate change.
Answer:
Forests help provide many essential resouces such as wood, leafs, bark, food, oxygen, and maybe water if their are lakes. For the second question, mostly human activity, and carbon dioxide happen to negatively affect the forests, people are the stimulis to deforestation.
Explanation:
Hope this helps!
Most of the functions of a cell membrane are performed by
a. proteins.
b. cholesterols.
c. phospholipids.
d.carbohydrates.
Answer:
Pretty sure the answer is, A.) Proteins
Explanation:
The photo shows many similar cells that work together. Which level of organization in living things does this photo represent? O A. Organ system O B. Organism O C. Tissue O D. Specialized cell
Answer:
So it would be c i think this because if all the cells are working to gether to form a certain function that would make up tissues!