Which statement most completely describes the role of the cell in a single-celled organism?
A. It provides the organism with nutrition and a means of locomotion
B. It provides the chemical functioning and genetic material that enables life, growth, and reproduction
C. It provides a boundary between the organism and its environment
D. It provides the support structure that the organism lack because it has no true skeleton
Answer:
B
Explanation:
the _____ receptors are stimulated by MSG , meat and cheese
Do both plant and animal cells have vacuoles ?
In the phosphorus cycle, phosphorus can recycle through waste products, decomposition, and of terrestrial and aquatic ecosystems.
food chains
the atmosphere
assimilation
Answer: Assimilation
Explanation: The assimilation of the phosphorous is found inside the terrestrial and aquatic animals.
The phosphorous is found to be present in the depth of ocean or under the rock. Over the time the rain carries away the phosphorous into water bodies.
The water containing phosphorus is taken by the aquatic animals and terrestrial animals it gets assimilated in the body cells.
Describe the relationship between cell biology and molecular biology
Answer:
Molecular biology deals with the study at molecular level like DNA, CHROMOSOME, DNA replication, gene expression, and control etc, while cell biology refers to study at cellular level, like cell parts and organelles, nucleus, and their functions and process.
Explanation:
Classify the following as either a specific or a nonspecific defense of the body's immune system. • skin
• macrophages
• bacteria • mucous
• fever
• B cells • T cells
• antibodies
• Skin •macrophages -Non specific
• mucous •fever
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• B cells • T cells -Specific
• antibodies • bacteria
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Hope it helps :)
A tight rope walker who does not want to change his position will want the forces acting on him to be Blank Space __________. Question 5 options: large small balanced unbalanced
The correct answer for fill in the blanks is Balanced.
Tight rope walker does not want to change his position to make sure that the force acting on him is balanced. A slight change in the position of the rope walker will make the rope move and this movement will result in the unbalance the force exerted on the walker. So, to make the force balance he will not change his position.
use gland and hormone in the same sentence
Answer:
The network of glands, that secretes chemicals called hormone to help the body to proper function, called Endocrine system.Explanation:
The endocrine system is a complex system of glands that release the different type of chemicals in the body, called hormones to help proper functioning. They regulate our growth and metabolism mainly. Hormones basically are the signaling molecules directly in blood and transferred through the bloodstream to any organ with a specific cell called receptors.
explain what can happen over million of years to the carbon compounds in organisms that can die and decompose?
Over millions of years, carbon compounds in dead and decomposed organisms can become fossil fuels due to anaerobic decomposition. When burned, these fuels release carbon dioxide into the atmosphere, contributing to climate change. Other geological processes can also release stored carbon.
Explanation:Over millions of years, the carbon compounds in organisms that die and decompose can undergo a series of transformations. Initially, decomposers like bacteria and fungi break down the decomposed organic material (dead plants and animals), releasing carbon in various forms into the environment. However, under particular conditions where oxygen is inadequate for complete decomposition, the partially decomposed organic matter can eventually turn into fossil fuels like coal, oil, and natural gas.
one significant source of carbon compounds is humus, which is a mixture of organic materials from dead plants and prokaryotes that have resisted decomposition. These fuels, when burned, release carbon dioxide into the atmosphere, contributing to global climate change. Other geological processes such as volcanic activities and tectonic movements can also lead to the release of stored carbon back into the atmosphere.
It's important to note that this process takes place over millions of years. Also, the rate at which we are using these fossil fuels far exceeds their rate of formation, making them a non-renewable resource.
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Explain how the energy in glucose is converted to useful energy in the body
The energy in glucose is converted to useful energy in the body through the process of cellular respiration, which occurs within the cells of the body and involves a series of chemical reactions.
What is the significance of energy of glucose ?The process of cellular respiration allows the body to convert the energy stored in glucose molecules into a form of energy that can be used for various activities such as walking, sleeping, etc., and the respiration process includes many steps. Cellular respiration, which includes glycolysis in the cell's cytoplasm, the citric acid cycle, and finally ETC, is involved in the energy creation process.
Hence, the energy in glucose is converted to useful energy in the body through the process of cellular respiration, which occurs within the cells of the body and involves a series of chemical reactions.
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What makes some collisions elastic and others inelastic?
Question 17 options:
If there is energy lost in the collision to sound, heat, etc., the collision is inelastic.
If there is no loss of kinetic energy in the collision, it is inelastic.
If the collision involves bouncing, it is elastic.
If the collision involves sticking together, it is elastic.
Answer : The The correct option is, If there is energy lost in the collision to sound, heat, etc., the collision is inelastic.
Explanation :
Elastic collision : It is defined as in which there is no loss of kinetic energy in the collision.Inelastic collision : It is defined as in which there is a loss of kinetic energy in the collision and this energy changed to another form of energy.If the collision involves bouncing, it is inelastic because kinetic energy is not conserved.
If the collision involves sticking together, it is inelastic because kinetic energy is not conserved, it is changes to potential energy.
Answer:
What makes some collisions elastic and others inelastic?
Selected Answer:
If there is energy lost in the collision to sound, heat, etc., the collision is elastic. (this was wrong)
Correct Answer:
If there is no loss of kinetic energy in the collision, it is elastic.
Response Feedback:
Consider how elasticity of a collision relates to energy.
Explanation:
What is the best explanation for why a cell might shrivel?
A, There is less water in the cell than there is water in the environment surrounding the cell.
B, There is more water in the cell than there is water in the environment surrounding the cell.
C, The water solution in the environment surrounding the cell has a higher solute concentration than the cell.
D, The water solution in the environment surrounding the cell has a lower solute concentration than the cell.
The right answer is C, The water solution in the environment surrounding the cell has a higher solute concentration than the cell.
Plasmolysis (the phenomena of shriveling cell) is a cellular state of the plant cell where, following loss of water, the membrane is detached from the pectocellulose wall. This is the opposite state of turgescence.
Plasmolysis occurs when a stream of water comes out of the vacuole and the plant cell through osmosis. The resulting decrease in pressure causes shrivelling of the soft parts of the plant (stems, leaves, petals), which are no longer supported by the turgor pressure.
This flow of water is created either by the lack of water in the external environment, or by the presence in this medium of a liquid more concentrated than the cellular medium. In these situations, there is a displacement of water by osmosis from the cell medium to the external medium.
Thus, the cells of a plant subjected to a drought or a water too concentrated in salts will lose their water and will be in plasmolysis. The soft parts will then shrivel up and the plant will die of water stress if the situation does not allow it to quickly reabsorb water.
How respiratory system works at the organ level? PLEASE HELP ME!!!!!!
DNA in a cell replicates. Of what is this an example?
A. Intracellular communication
B. Enzyme-linked receptors
C. Ion Channel-linked receptors
D. Intercellular communication
The answer is A. Hope this helps.
The replication of DNA is an example of intracellular communication. Therefore, option A is correct.
What is the replication of DNA?The act of copying and duplicating a DNA molecule is known as DNA replication. The procedure is run in a semi-conservative manner. In other words, the newly generated strand and the original strand will both be present in the new DNA molecule. This process occurs in the cytoplasm of prokaryotes and in the nucleus of eukaryotes.
Before dividing, cells must copy their DNA. This promotes the successful inheritance of genetic features by giving each daughter cell a copy of the genome. The fundamental mechanism of DNA replication is similar across all organisms, making it a crucial operation.
It is an example of intracellular communication. Therefore, option A is correct.
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True or false: The central nervous system allows us to sense the environment
Benjamina started her walk from the front door of her ground floor apartment. She walked 6 meters to the corner of the building and then turned the corner and walked 10 meters to her friend’s apartment. Identify the difference between the distance she walked and her displacement.
Answer:
The change in her position (from beginning to end), along with the direction, is considered her displacement. This value is a measurement and a direction. The total distance along the path from her starting point to her end point is considered her distance. This value is a measurement only.
Explanation:
Which of the following is not true of theories and laws?
A law has no exceptions.
A hypothesis might eventually lead to a theory.
All theories will eventually become laws.
A theory might be proven wrong.
Which term is defined as the exact location where an earthquake occurred?
Answer:
Epicenter.
Explanation:
This answer was correct on my quiz. :))
There are five elements of a universal systems model: goal, inputs, processes, outputs, and feedback. Which of the following describes the "processes" portion of this model? (A)what is done to the inputs, (B) the results of the system (C) the money, time, and resources used on the model (D) information collected from the outputs
Answer:
Option A. What is done to the inputs.
Explanation:
Processes means " To treat something", or "To deal with information". so here we process the inputs to get a result.
What is ridge push ?
(A) when edges become denser and gravity pulls them downward and away from one another.
(B) cooler and denser crust sinks into mantle.
(C) folding and crumpling and sliding upward creating mountains.
(D) currents just beneath earths crust flow very slowly causing movement In the plates above them.
This is for science.!!
Answer: (A) when edges become denser and gravity pulls them downward and away from one another.
During continental and oceanic plate tectonics. The plates collides with one another as a result of divergent tectonics. The edges at the point of contact gets displaced off from lighter plate and sinks at the bottom due to the effect of graviational pull. This is known as subduction. Due to force of collision these plates do not sunduct to the same location but are thrown to distinct places away from each other.
UMM who's good at science bc i need help?!?!?!
~ Where does the heat come from that drives this convection current in the mantle?
Please help!!!
Sometimes when people are cold they rub their hands together to create friction. Keeping this is mind, briefly explain the relationship between friction and thermal energy?
Which would have a better chance of becoming a fossil a fish that died and settles to the ocean floor or a mouse that dies on the ground in the forest
Which statement describes the function of the plasma membrane?
A, it converts glucose into ATP, an energy molecule.
B, it recognizes substances and other cells it comes in contact with.
C, it transfers RNA to ribosomes to make proteins.
D, it makes phosphates hydrophilic.
2. How could the duck-billed dinosaur tooth fossil lead scientists to believe that plants also existed in Antarctica?
Because duck-billed dinosaurs could not have survived without plants, their presence in Antarctica proves that plants existed there. Additionally, fossil plants have been found in Antarctica.
The movement of crust along faults can make mountains, canyons, and other landforms. Is this true or false?
Why don't scuba divers lungs collapse as they descend?
Final answer:
Scuba divers' lungs do not collapse due to the use of compressed air from scuba equipment, which equals the surrounding water pressure. Divers equalize pressure in their body by breathing normally and using techniques to match the external water pressure. On ascent, divers must rise at a controlled speed to safely off-gas accumulated nitrogen and prevent decompression sickness.
Explanation:
Scuba divers' lungs do not collapse as they descend due to the design of the scuba equipment they use. The equipment provides compressed air from a tank, which compensates for the increasing water pressure at depth. This compressed air ensures that the pressure of the air breathed in is equal to the surrounding water pressure, preventing lung collapse.
When descending, divers must equalize the pressure in their body airspaces, such as lungs, ears, and sinuses, to match the external water pressure. They breathe normally to add air and equalize pressure in the lungs. In contrast, techniques like pinching the nose and gently blowing or using the muscles in the back of the throat are used to equalize pressure in the ears and sinuses.
On ascent, the ambient pressure decreases and gases dissolved in the blood become less soluble. To prevent decompression sickness (DCS), a diver must ascend at a safe speed, allowing the dissolved gases to be safely expelled from the body. If DCS occurs, hyperbaric oxygen therapy may be administered in a recompression chamber.
the lymphatic systems function is to _______. A transport fluids B digest food C breathe D remove waste
Which statement BEST describes why warm ocean currents are usually surface currents?
A)Warm water is less dense than cold water.
B)Ocean tides bring warm water to the surface.
C)Warm water contains more salt than cold water.
D)Ocean water loses heat to the air at the surface.
Warm ocean currents are usually surface currents because warm water is less dense than cold water, causing it to remain near the surface while cold water sinks to deeper levels.
The statement that BEST describes why warm ocean currents are usually surface currents is: A) Warm water is less dense than cold water. This is because the density of water depends on its temperature and salinity. Warm water, being less dense, remains at the surface while denser cold water sinks to deeper levels. This pattern is part of the global phenomenon known as thermohaline circulation, which combines temperature (thermo) and salinity (haline) to drive ocean currents. In addition to being influenced by wind, surface currents are driven by the density differences caused by temperature variations, with the warmer waters naturally tending to stay at or near the surface.
Moreover, processes such as evaporation and the formation of sea ice can affect salinity and thereby water density, leading the colder, denser water to sink and form deep ocean currents. The warm, less dense surface waters take their place, facilitating the global distribution of heat through the Great Ocean Conveyor Belt. This massive circulation system plays a vital role in Earth's climate by distributing heat and regulating temperatures across the globe.
How do the excretory and respiratory systems work together?