The fine adjustment knob on the microscope? all of the answer choices are correct. locates the focus plane. locates the specimen. fine-tunes the focus.
Answers
The focus can be adjusted with the microscope's fine adjustment knob.
The fine adjustment knob, what is it?In order to fine focus the image when looking at higher magnifications, a slow but exact control is used.What does a microscope's precise focus do?Focus (fine), After bringing the image into focus with the coarse focus knob, use the fine focus knob to make it more sharply focused. Illuminator, Most microscopes include an illuminator incorporated into the base.How far can the stage be moved using the fine adjustment knob?The coarse focus knob typically travels at a pace that is one tenth that of the fine focus knob. As a result, you can adjust the focus quite precisely. Even using the fine focus knob to concentrate on the specimen with the high power objective is challenging.To learn more about microscope visit:
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The unique properties of water make life possible on Earth. Approximately three-quarters of the Earth's surface is covered by water. Cells are made up of around 70-95% water. Water comprises roughly 70% of the human body.
ANSWER ONLY ONE OF THE FOLLOWING (please indicate which one you're answering; put 1 or 2).
(1) Explain the properties of water that enable it to travel up through the roots and stems of plants to reach the leaves.
OR
(2) Explain why the temperature of the oceans can remain relatively stable and support vast quantities of both plant and animal life, when air temperature fluctuates so significantly throughout the day or over the seasons.
Answers
1. The properties of water that enable it to travel up through the roots and stems of plants to reach the leaves are cohesion, adhesion, and capillary action.
Cohesion This property refers to the attraction between water molecules due to hydrogen bonding. It enables water molecules to stick together, forming a continuous water column within the plant. Adhesion is the attraction between water molecules and the surfaces of the plant's xylem vessels. This helps water molecules attach to the walls of the vessels and move upwards against gravity.
Capillary action: This is a phenomenon where water moves through narrow spaces due to the combined effects of cohesion and adhesion. In plants, the xylem vessels are narrow tubes, and capillary action helps water move upward from the roots to the leaves.
Therefore , these unique properties of water enable it to travel through the plant efficiently, providing essential nutrients and hydration to various parts of the plant for growth and survival.
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quizlet baclofen and botulinum toxin are both administered as muscle relaxants. what similarities and differences they have?
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Baclofen and botulinum toxin are both administered as muscle relaxants. Although both drugs are used to treat spasticity, there are significant differences between them.
Baclofen is a medication that works as a muscle relaxant by affecting the communication between nerve cells in the spinal cord. It can relieve muscle spasms and stiffness caused by diseases such as multiple sclerosis and cerebral palsy. Baclofen is taken orally in the form of a tablet or liquid. It is a central-acting agent, meaning it targets the central nervous system.
Botulinum toxin is a neurotoxin that prevents the release of a chemical called acetylcholine. It is produced by the bacteria Clostridium botulinum. It is used to treat spasticity, as well as many other medical and cosmetic applications, such as reducing the appearance of wrinkles. It is injected directly into the muscle, and it takes about 3 to 7 days to take effect. Botulinum toxin is a peripheral-acting agent, which means it affects the peripheral nervous system.Differences between Baclofen and Botulinum toxin:
Mode of Action: Baclofen works on the central nervous system, while botulinum toxin works on the peripheral nervous system.Route of administration: Baclofen is taken orally in the form of a tablet or liquid, while botulinum toxin is injected directly into the muscle.Onset of action: Baclofen may take a few days to start working, while botulinum toxin takes about 3 to 7 days to take effect.Duration of action: Baclofen's effects may last for several hours, while botulinum toxin's effects can last for several months.
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i) predict which of the liquids would cause the largest decrease in mass of potato stick
PLEASE PLEASE HELP ME I HAVE 10 MINUTES ONLY, I WILL GIVE YOU THE BRAINLIEST!!
Answers
Answer:
1.0 mol per dm^3 sodium chloride solution
Explanation:
The idea behind this question is that the water inside the potato stick would move into the surrounding liquid naturally if the density outside the stick is greater than it is inside. Therefore, the liquid that would most encourage the flow of water from the potato stick would be the moet dense liquid- which in this case, is 1.0 mol per dm^3 sodium chloride solution.
Are the cells in your skin different than the cells in your heart or in your bones? Are they
different from your nerve cells? How? Why are they different?
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Answer:
They have same genes but cells use it differently
Explanation:
These cells are different because they use the same set of genes differently. for example neurons differ from other cells in the body because: Neurons have specialize cell parts called dendrites and axons. Dendrites bring electrical signals to the cell body and axons take information away from the cell body. Neurons communicate with each other through an electrochemical process.
Cyanide poisoning occurs when cyanide, a cellular toxin, disrupts the cell's ability to complete cellular respiration. This ultimately causes the cell to be unable to produce enough ATP for survival.
Which labeled structure is the most likely target of cyanide poisoning in the cell?
Choose 1 answer:
(Choice A)
A
Structure A
(Choice B)
B
Structure B
(Choice C)
C
Structure C
(Choice D)
D
Structure D
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Unable to produce ATP-> no energy-> powerhouse of cell destroyed-> mitochondrion (B)
In case of cyanide poisoning, the cell will unable to produce ATP, no energy, the cell will be destroyed . Hence option B is correct.
What Is Cyanide?
It is carbon-nitrogen (CN) molecule, some are not deadly but some are poisonous such as sodium cyanide, potassium cyanide, hydrogen cyanide etc.
The deadly cyanide when present in a cell, a cellular toxin which degrade the cell and destroy its ability to complete cellular respiration.
The harmless cyanide present in nitriles applied in the field of pharmaceuticals as they do not release the metabolic poison such as CN- ion.
Cyanide ion play as an irreversible enzyme inhibitor which prevent mode of action of cytochrome C oxidase from doing its job so that transport electrons to oxygen in the electron transport chain is inhibited and interrupt of aerobic cellular respiration.
So that mitochondria will be unable to produce the energy carrier adenosine triphosphate in absence of oxygen.
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Class turbellaria of Platyhelminthes consists of: A) FlatwormB) Flukes;C) Leeches;D Tapeworm;E) None of these.
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The tubellaria class consists of animals that can live freely in water, such as the planarian.
They are hermaphroditic animals that can cross-fertilize.
Analyzing the options given by the exercise, we have that the correct alternative is "A", because flatworms belong to the tubellaria class.
Which of these statements expresses a scientific theory?
A. All the tissues that make up animals consist of cells.
B. The larger of two cells probably contains a nucleus.
C. Cells are the basic units of life.
ОО
D. A material that consists of cells came from a living organism.
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Answer:
C
Explanation:
The cells make up a living organism, that is, it is the basic functional unit of the living organism.
Hypotheses, theories, and laws all explain observations about the natural world, but in different ways.
A
is a statement of fact that is generally accepted to be true and universal because it has always been observed to be true.
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Answer:
Explanation:
DONT KNOW SORRY
Dinitrophenol (dnp) is an uncoupler that makes the inner mitochondrial membrane leaky to protons. it was used until 1938 as a weight-loss drug. what effect would you expect dnp to have on the change in ph across the inner mitochondrial membrane?
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Dinitrophenol (DNP), as an uncoupler, would disrupt the pH gradient across the inner mitochondrial membrane, leading to a decrease in the change in pH.
The inner mitochondrial membrane plays a crucial role in generating ATP through oxidative phosphorylation. During this process, a proton gradient is established across the inner mitochondrial membrane, with a higher concentration of protons (lower pH) in the intermembrane space and a lower concentration of protons (higher pH) in the mitochondrial matrix. This proton gradient drives the synthesis of ATP by the ATP synthase enzyme.
DNP acts as an uncoupler by increasing the permeability of the inner mitochondrial membrane to protons. This means that DNP allows protons to freely diffuse back into the mitochondrial matrix without passing through ATP synthase. As a result, the proton gradient is dissipated, and the change in pH across the inner mitochondrial membrane decreases.
When DNP is present, the leakage of protons across the inner mitochondrial membrane reduces the proton gradient, which in turn impairs the ATP synthesis process. While this disruption of the pH gradient may lead to increased energy expenditure and potentially weight loss, it can also have detrimental effects on cellular function and can be highly toxic. Therefore, the use of DNP as a weight-loss drug has been discontinued due to its severe side effects.
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what do having the measles and being vaccinated against the measles have in common? group of answer choices they are both forms of neutral immunity. they are both forms of passive immunity. they are both forms of an immune deficiency. they are both forms of an infection. they are both forms of active immunity.
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Having the measles and being vaccinated against the measles are both forms of active immunity. Therefore the correct option is option D.
When the immune system makes its own antibodies in reaction to an antigen, such as a virus or a vaccine, this is referred to as active immunity. Following a measles infection, a person's immune system creates antibodies to combat the virus, and these antibodies offer lifelong defence against additional measles infections.
The immune system is exposed to an inactive or weakened form of the virus when a person takes a measles vaccine, which causes the body to produce antibodies. Long-term defence against additional measles infections is also offered by these antibodies. Therefore the correct option is option D.
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Which organelle would you expect to find in animal cells but not plant cells?
O A. mitochondrion
OB. ribosome
C. lysosome
O D. A. smooth endoplasmic reticulum
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Answer:
Lysosome
Explanation:
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What is gaseous transport????
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Help please!
I know one of the answers is that the lower temperature means the reaction will happen slower, but what’s the second answer?
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Answer with Explanation:
Hydrogen peroxide is considered "unstable," thus, storing it in the refrigerator provides two advantages:
1. It slows down thermal decomposition.
The rate of decomposition slows down when the temperature is lowered. It increases when the temperature rises.2. It prevents photolytic decomposition.
Photolytic decomposition happens when hydrogen peroxide is exposed to sunlight or bright light. It therefore increases the rate of reaction. Therefore, hydrogen peroxide should be stored in a cool and dark place, such as the refrigerator.Which method enables the visualization of minute but specific structural details of a neuron, such as synaptic vesicles
Answers
The method that enables the visualization of minute but specific structural details of a neuron, such as synaptic vesicles, is electron microscopy.
Electron microscopy uses a beam of electrons instead of light to visualize extremely small structures. It provides a high-resolution image of the neuron, allowing researchers to observe intricate details that are not visible with other types of microscopy.
To visualize synaptic vesicles, which are small sacs containing neurotransmitters, electron microscopy can be used to examine the synapse, the specialized junction between two neurons. The electron beam can penetrate the sample, and when it interacts with the tissue, it produces an image that reveals the synaptic vesicles and other structural elements of the neuron.
This technique has greatly contributed to our understanding of the organization and function of neurons. It has allowed researchers to study the fine details of synaptic connections, which play a crucial role in communication between neurons in the brain.
In summary, electron microscopy is the method that enables the visualization of minute but specific structural details of a neuron, such as synaptic vesicles. It uses an electron beam to create high-resolution images, providing insights into the intricate organization of neurons and their synaptic connections.
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Isaac is studying relationships between organisms in the phylum Chordata, which includes humans and all other animals with a backbone. Beginning with domain as 1 and then counting down the levels in the modern system of classification, what level is "phylum”?
2
3
4
5
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Answer: Phylum is at level 2.
All living organisms are classified, and the reasons for this are so that they can be examined better, to know and discover their relations, their evolutionary paths etc. while in the past there have been some more simplified classifications, the modern one is complex and well established, based on the characteristics of the organisms(living and died out).
Explanation: Kingdom: Animalia(an animal)
Phylum: Chordata (vertebrate)
Class: Mammalia(mammal)
Order: Carnivora(carnivore)
Suborder: Feliformia (also Feloidea) (cat-like)
Family: Felidae(true cat)
Subfamily: pantherine(big cat branch)
Pls give the first person brainiest I'm just doing this for a challenge
Genus:panthera(big cat)
Species:P.uncia(snow leopard)
Answer:
2
Explanation:
Histamine binds to the h1 g-protein-linked receptor to initiate the itchiness and airway constriction associated with an allergic response. If a mutation in the associated g-protein’s alpha subunit prevented the hydrolysis of gtp how would the allergic response change?.
Answers
Greater allergic reaction than would occur with normal G-protein signaling. In our cells, the G protein system is the most prevalent kind of signaling. Our cells contain tens of thousands of G-protein-coupled receptors (GPCR).
What about histamine?Histamine causes itching by interacting with nerves. It can lead to nausea and diarrhea in people with food sensitivities.Additionally, it tightens the lungs muscles, making breathing more difficult.Most concerning is when histamine results in anaphylaxis, a serious reaction that can be fatal. Headaches or migraines, nasal congestion or sinus problems, exhaustion, and hives are all signs of histamine intolerance. The two main causes of acute histamine poisoning are rotting fish or insufficient refrigeration.As a result, bacteria overgrow and produce excessive amounts of histamine from histidine. Histamine poisoning may be more likely in those with extremely low levels of the enzyme diamine oxidase. Histamine levels in the blood and urine are typically quite low. People who have a strong allergic reaction and those who have a disease in which the number of mast cells rises (proliferates) and/or becomes active without obvious sensitivities can both experience significant increases. Starting an elimination diet, which limits consumption to foods and beverages with minimal levels of histamine, is the greatest strategy to help the body get rid of histamine.Learn more about histamine here:
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What is the best method for describing and mapping terrestrial biomes? Biome Metric System (BMS) There's no standardized method, so the best method is to evaluate climatic conditions and the dominant form of vegetation International System of Biomes (ISB) Universal Biome System (UBS) There's no standardized method, so the best method is to evaluate human uses and valuation of the area
Answers
The best method for describing and mapping terrestrial biomes typically involves evaluating climatic conditions and the dominant form of vegetation. This approach is widely used and forms the basis for various classification systems, including the Köppen-Geiger climate classification system and the Holdridge life zone classification system. These systems consider factors such as temperature, precipitation, and vegetation types to classify and map different biomes.
While there is no universally standardized method for describing and mapping biomes, the evaluation of climatic conditions and vegetation provides a robust and scientifically grounded approach. It allows for the identification of distinct biomes based on their ecological characteristics and helps understand the distribution of different biomes across the Earth's surface.
Other approaches, such as the International System of Biomes (ISB) or Universal Biome System (UBS), may incorporate additional factors or emphasize human uses and valuation of the area. These approaches may be more focused on human perspectives or conservation priorities rather than purely ecological considerations. However, when it comes to a scientific understanding of biomes, evaluating climatic conditions and vegetation remain key factors.
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DNA is the genetic material that...
Answers
Answer:
the produces all genes and is passed down from parent to child and provides the "instructions" on the growth of the body, if the DNA is altered it can lead to things such as cancer, genetic mutations, etc.
Explanation:
Answer:
The answer is
That make up a living thing
what is the purpose of DNA replication
Answers
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
* do consider marking me brainliest, if it does help, do also correct me if I am wrong in some way. thank you <3.
Answer:
to produce two identical DNA molecules
Explanation:
I need to know about everything in biology because it’s difficult
Answers
Biology is very simple. Stay focused on brainly.
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1. Complete a dichotomous key for the 10 leaves on the Common Leaves sheet. The chart provided here allows for 11 pairs of statements. Depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.
Statement Types/Dichotomous key for leaves Identification Name/Number of Leaves
Statement 1a Click or tap here to enter text.
go to statement or identify leaf Click or tap here to enter text.
Statement 1b Click or tap here to enter text.
go to statement or identify leaf Click or tap here to enter text.
Answers
This dichotomous key should help you identify the leaves on the Common Leaves sheet by asking a series of yes/no questions and directing you to the appropriate leaf based on your answers.
Sure! Here's a dichotomous key for the 10 leaves on the Common Leaves sheet:
1a. Leaves are needle-like or scale-like (go to Statement 2)
1b. Leaves are not needle-like or scale-like (go to Statement 3)
2a. Leaves are arranged in clusters (go to Statement 4)
2b. Leaves are not arranged in clusters (go to Statement 5)
3a. Leaves are broad and flat (go to Statement 6)
3b. Leaves are not broad and flat (go to Statement 7)
4a. Clusters of leaves have 2 needles (go to Leaf 1)
4b. Clusters of leaves have more than 2 needles (go to Leaf 2)
5a. Leaves are feathery and fern-like (go to Leaf 3)
5b. Leaves are not feathery and fern-like (go to Statement 8)
6a. Leaves are heart-shaped (go to Leaf 4)
6b. Leaves are not heart-shaped (go to Statement 9)
7a. Leaves have a sawtooth edge (go to Leaf 5)
7b. Leaves do not have a sawtooth edge (go to Statement 10)
8a. Leaves have rounded lobes (go to Leaf 6)
8b. Leaves do not have rounded lobes (go to Statement 11)
9a. Leaves have a waxy texture (go to Leaf 7)
9b. Leaves do not have a waxy texture (go to Leaf 8)
10a. Leaves have deeply cut lobes (go to Leaf 9)
10b. Leaves do not have deeply cut lobes (go to Leaf 10)
Leaf 1: White Pine
Leaf 2: Red Pine
Leaf 3: Maidenhair Fern
Leaf 4: Sweetgum
Leaf 5: Red Maple
Leaf 6: Sugar Maple
Leaf 7: Magnolia
Leaf 8: Dogwood
Leaf 9: Oak
Leaf 10: Ginkgo
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why is work negative sometimes?
Answers
1 J = 1 N m. Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work
One difference between photosynthesis and cellular respiration is that cellular respiration:
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The main difference between photosynthesis and cellular respiration is that photosynthesis is an anabolic process, where the synthesis of organic compounds occurs, storing energy whereas cellular respiration is a catabolic process, where the stored organic compounds are utilized, producing energy.
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The diagram below shows a basic steps involved in respiration glucose in a carbohydrate what we act with glucose in order to complete the steps
A oxygen
B carbon dioxide
C nitrogen
D hydrogen
Answers
You add oxygen to glucose to complete the steps
The surface of earth is always changing and making new features. Which weather conditions have the greatest effect on the surface of earth?.
Answers
The main factor influencing Earth's surface is sunlight. By generating temperature gradients in the atmosphere and oceans, the sun fuels life on Earth and controls the weather and climate.
What causes the abrupt changes that take place on the earth's surface?Large boulders are broken up and surface sediments are moved by wind, water, and ice. Weathering, erosion, and deposition typically take years to produce observable changes. However, other events alter the surface of the Earth far more swiftly. These include landslides, earthquakes, and volcanic outbursts.
What kind of alteration to the surface of the Earth requires time and a procedure?Erosion happens when the loosening soil and crumbled rock are carried away by natural forces like wind, water, or ice. Earthen materials can't be built up where they developed because of erosion. Erosion typically takes place slowly and covertly over a lengthy period of time.
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Does light have an effect on carbon dioxide production by plants and animals?
(No Links!! type the answer)
Answers
Answer:
Light provides the energy for photosynthetic pig- ments to convert carbon dioxide (CO2) and water into sugars and oxygen. As light intensity increases – until a point – the amount of sugars increases and thus, more energy is available for plant growth and maintenance. ;)
Help me with this please
Answers
Answer:
C. Protective Barrier against infection and disease
Explanation:
The skin does not send chemical messages, nor electrical, and the skeletal and muscular system is what allows movement and structure, which leaves C as the answer because it is what protects outside diseases from getting into your blood or arteries
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Look at picture, please. Thank you.
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2. sickle cells are unhealthy red blood cells that cause sickle cell anemia. The cells are shaped like crescent moons and clog the blood flow causing pain.
photosynthetic algae are most likely to be found in
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Answer:
photic zone is the place where it is most likely to be found in
Photosynthetic algae are commonly found in aquatic environments.
Photosynthetic algae live in lakes, rivers, oceans, and ponds. Algae grow and photosynthesis in these situations. Microalgae and seaweeds are both algae. They contribute to the ecosystem and thrive in aquatic environments.
Algae can float in waters or stick to rocks, plants, or sediment. Under favourable conditions, they bloom, creating green, brown, or crimson water patches.
Algae form the oceanic food chain. They nourish little fish, invertebrates, and marine mammals. Algae produce a lot of oxygen through photosynthesis. Sunlight, nutrients, water, and temperature affect photosynthetic algae dispersion. They help aquatic environments produce and thrive.
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which would have most likely stopped Mendel from finding a pattern in his results
Answers
The options attached to the given question is attached here as well as in the comments of the question:
A.If having a wrinkled seed had been a recessive trait
B.If garden peas reproduced more quickly
C.If seed shape did not have a clearly dominant form
D.If having a smooth seed had been a dominant trait
Answer:
The correct answer is - C. If the seed shape did not have a clearly dominant form.
Explanation:
Mendel studied and perform his research on seven different traits in peas, which are – height, seed color, flower color, and seed shape. In Mendel’s study, every trait has traits that are clearly either dominant or recessive.
Similarly, the seed shape has a very clear dominant form which is smooth seed dominant over wrinkled seed that is a recessive trait. If this clear dominant form or recessive form could not be established, then Mendel’s experiment would have most likely stopped its progress.