The foot of a ladder should be 1/4 working length from the base of the structure from which it is leaning.
What are extension ladders?Extension ladders are two-section ladders that use brackets or guides to allow the ladder to be used at various adjustable lengths.Extension ladders are not self-supporting and must be secured to a stable structure.Make sure the ladders are on a firm surface, that the surface is level, and that the footing is secure.Before climbing, make sure the locking ladder hooks are secure. Aluminum is the lightest and least corrosive option. Aluminum ladders are not recommended for electrical work or use near power lines because they are among the most effective conductors of electricity. Fiberglass ladders are heavier than aluminum ladders, but they are stronger and more versatile.To know more about ladders:
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2. Explain why a bear will need the following;
a. Food and water
b. Shelter.
c. Mates to reproduce young ones.
Answer:
Competition for food, water, shelter, predation by bears and wolves, and mates would all increase if the population is large and dense.
Explanation:
First of all every living things needs basic food and water to survive.
And without shelter the population would not survive natural disasters and Mother Nature.
They produce young’s ones to keep population steady and not go extinct.
Answer:
A bear is a form of life, and like every form of life, it it has basic needs that have to be met. All organisms need water to survive. Organisms take in food to turn into energy. Without those, the bear would not be able to function and would die. Shelter is needed for protection, essentially. Having a safe place for the bear can shield it from harsh weather, and gives the bear a place to stay safely. If there weren't any mates for the bear, there would not be any way for it to repopulate. The bear will eventually die and there wouldn't be anything to take its place. If this were to happen on a large scale, the bear population would die off, ultimately throwing off the ecosystem and causing a major imbalance in nature.
Which term best describes the fine tuning of an antibody mediated immune response, via genetic hypermutatoins?
Adaptive Immunity is the term that describes the fine-tuning of an antibody-mediated immune response, via genetic hypermutations.
Adaptive immunity involves lymphocytes- B cells and T cells which have receptors for any antigen they encounter. When exposed to an antigen, T cells release chemicals to activate B cells. B cells then divide and differentiate into memory cells and plasma cells. Plasma cells produce a large number of antibody molecules to fight against the specific antigens while memory cells reserve some of these antibodies to protect the body from future infections.
Genetic hypermutation changes the affinity of an antibody (B cell receptor) to detect the antigen. This occurs through a process called affinity maturation. It enables an antibody to produce a stronger and specific response to an antigen.
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During your speech, you use an enlarged replica of a dna molecule to explain a genetic concept. you are using which type of visual aid?
During your speech, you use an enlarged replica of a dna molecule to explain a genetic concept. you are using Model visual aid.
Visual aids are anything that can be seen, such graphs, pictures, videos, etc., that is used in addition to spoken information. Speech support that is visibly visible rather than verbal is known as a visual aid. This could be a graph, list, illustration, model, etc (see the text on page 330 for a complete list). When speaking, using visual aids might help the audience understand what you're saying on a deeper level.Model: A visual representation used to describe how a system, object, or event works. • Props: Things used in plays and other similar entertainment to further the plot. Objects. Real things can sometimes be used as visual aids to strengthen your presentation.learn more about Visual aids here: https://brainly.com/question/3610367
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Which brain imaging techniques allow for the observation of structure but do not allow observation of brain activity?
With the use of cutting-edge noninvasive neuroimaging methods like EEG and fMRI, researchers may now watch brain activity while volunteers carry out different perceptual, motor, and/or cognitive tasks.
Which three methods enable the study of the active brain?There are several ways to go about gathering data about the anatomy and activities of the brain. Functional magnetic resonance imaging (fMRI), magnetoencephalography (MEG), and electroencephalography are the three most popular and often utilised measurements (EEG)
Why is fMRI employed?It can be used to investigate the functional architecture of the brain, identify the regions of the brain responsible for vital functions, assess the consequences of a stroke or other illness, or determine how best to treat the brain. Other imaging methods may be unable to find abnormalities in the brain that fMRI can.
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Complete each statement with the correct term from the drop-down menu.
Many molecules are moved through the body by .
provide structure for plants.
determine what people look like.
Cells are surrounded and protected by .
speed up chemical reactions in the body.
Hemoglobin, a protein, is built by .
The human body is insulated by .
Answer:
1. many molecules are moved through
the body: BIOLOGICAL MOLECULES
2. provide structure for plant determine what people look like: EUGELA
3.cells are surrounded and protected by:CELL MEMBRANE
4.speed up chemical reaction in The body:ENZYMES
5.hemoglobin a protein is built by:RED BLOOD CELL
6.the human body is insulated by:SUGAR OR DIABETES
1. Proteins
2. Carbohydrates
3. Nucleic acids
4. Lipids.
5. Proteins
6. Nucleic acids
7. Lipids
on edge 22
What creates a sense not only of enclosure and connection, but also movement and direction?.
The creates a sense not only of enclosure and connection, but also movement and direction is implied line creates a sense not only of enclosure and connection, but also movement and direction
Implied lines are lines that aren't really there, but that are propose by other things in an artwork.Implied Lines are Lines that are indicated in artwork at edges where two shades meet, where a from ends and the space around it begins, or by positioning several objects or figues in a row.Line is an element of art that is to define space, contours, and outlines or suggest mass and volume. It possibly marks a continuous mark made on a surface with a sharped edge tool or implied by the edge of shapes and forms.To know more about implied line visit : https://brainly.com/question/2807939
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Why do cells age and die?
No one knows for sure
Radiation
Protein changes
Changes in molecular shape
The cell age and die because of changes in proteins. The correct option is C.
What are cells?
Cells are living units that together form an organism. They contain cell organelles, and the cell organelle performs the carious function of the body. Cells are made up of macromolecules, like protein, lipids, and carbs.
There are various types of cells that perform different functions of the body. Old cells die and new cells are made from the old cells. The old cells die because of a change in the protein structure of protein denaturation.
Thus, the correct option is C. Protein changes.
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What is the first thing you should know to ensure successful recovery after an animal is shot?.
All changes saved
3. Bacterial cells are unicellular and often reproduce using binary fission. The offspring are identical to
the parent as there is no combination of gametes. What type of reproduction would this be
considered?
Fusion
Budding
Sexual
Asexual
Cell membrane is to cell as nuclear membrane is to-
Answer:
nucleus
Explanation:
The nucleus is surrounded by nuclear membrane, while the cell is surrounded by a cell membrane.
Each enzyme produced by the body is specific—meaning it is only able to catalyze a reaction with a certain substrate. What causes an enzyme to be specific?
Answer:
Enzymes are specific because different enzymes have different shaped active sites. The shape of an enzyme's active site is complementary to the shape of its specific substrate or substrates. This means they can fit together.
Archie, the ape in the Cleveland Zoo, has a cut on his hand which needs to heal. If his skin cells have 48 chromosomes each, how many will his daughter cells have after going through mitosis to heal his injury?
The number of daughter cells that Archie needs for the hand to heal will depend on the damaged tissues regardless of the amount of chromosomes of somatic cells (in this case skin cells have 48 chromosomes each, and daughter cells also have the same number).
What is mitosis?Mitosis is a cell division process by which a multicellular organism generates somatic body cells in order to repair tissues and develop into an adult organism.
Mitosis generates for each cell division process two daughter cells that are genetically identical to the original parental cell which gives origin.
In conclusion, the number of daughter cells that Archie needs for the hand to heal will depend on the damaged tissues regardless of the amount of chromosomes of somatic cells (in this case skin cells have 48 chromosomes each, and daughter cells also have the same number).
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evaporation outpaces condensation over the ocean, yet water level doesn’t change because of this. why is this?
a. water filters in from the ocean floor
b. all streams eventually lead back to the ocean
c. shorelines don’t change, but the middle of the ocean does
d. the middle of the ocean doesn’t change, but shorelines do
Answer:
I am not sure but I think option d is correct
Mitosis is the process that forms gametes.
true
false
Answer:
False.
Explanation:
It would be meiosis, not mitosis.
Answer:your answer is false.
Explanation:
What caused the planets and the Sun to have spherical shapes? Type here to search A force of inertia that pulls matter in a planet or star away from the center equally in all directions A gravitational force that pulls matter in a planet or star away from the center equally in all directions A force of inertia that pulls matter in a planet or star toward the center equally in all directions A gravitational force that pulls matter in a planet or star toward the center equally in all directions
Answer:
A planet's gravity pulls equally from all sides. Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three-dimensional circle.
What is the logical procedure for the biologist to follow in testing the enzyme
Answer:
In order for the biologist to conduct an accurate test, he/she must obtain two test tubes and label one as A and one as B.
PLs help!
50 points!
Jordan is doing a science fair project on the effects of music on the growth of tomatoes. He has two tomato plants, Plant A and Plant B, that he grows in a window and gives the same amount of water. Plant A is exposed to classical music using headphones attached to the soil. Throughout the growth period, Jordan counts the number of tomatoes produced by each plant.
Plant A = 35 Tomatoes | Plant B = 55 Tomatoes
6.
What is the dependent variable in this experiment? What is the independent variable?
Answer:
The control group is the type of tomato the plants are.
The independent variable is the type of music played.
The dependent variable is Plant A and B's growth.
His conclusion should be that music does not affect the growth of tomatoes.
He should make sure both plants were getting the same amount of water, soil, light, seed, and fertilizer so that can't affect the tomatoes in any way.
Explanation:
Hope this helps
Brainliest please
One of the molecules involved in coupling anabolism (i.e., harvesting energy from precursors) to catabolism (building macromolecules) in living systems is:___________
One of the molecules involved in coupling anabolism (i.e., harvesting energy from precursors) to catabolism (building macromolecules) in living systems is Adenosine triphosphate (ATP).
Define Adenosine triphosphate (ATP)?An organic substance called adenosine triphosphate powers a variety of biological functions in living cells, including muscular contraction, nerve impulse transmission, condensate dissolving, and chemical production.
what is difference between anabolism and catabolism?The body's metabolism is a critical component of growth, development, and effective operation. Based on how they function, it can be divided into two types: catabolism and anabolism. The way molecules are used by the organism in catabolism and anabolism are the main distinctions. Anabolism uses energy to produce the molecules that the body needs to function. The breakdown of complex molecules during catabolism, on the other hand, results in the release of energy that the body can use.
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The red pigmented protein in erythrocytes that transports oxygen and carbon dioxide is called.
The red pigmented protein in erythrocytes that transports oxygen and carbon dioxide is called hemoglobin.
What is hemoglobin?Red blood cells contain the protein hemoglobin, which transports oxygen. How much hemoglobin is in your blood is determined by the hemoglobin test. The most significant part of red blood cells is hemoglobin. It is made up of heme, a protein that binds oxygen. Carbon dioxide and oxygen are exchanged in the lungs.What level of hemoglobin is concerning?The threshold for a high hemoglobin count differs slightly from one medical practice to another. It's generally defined as more than 16.6 grams (g) of hemoglobin per deciliter (dL) of blood for men and 15 g/dL for women.What causes a decrease in hemoglobin?Low hemoglobin is most frequently caused by a diet that is inadequate in iron. Low hemoglobin levels can cause headaches, exhaustion, and pale complexion. Surgery, iron therapy, and iron supplementation are all options for treating low hemoglobin. It's also crucial to include more foods high in iron in your diet.To learn more about hemoglobin visit:
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Filtration of samples to remove microbial cells typically use micropore filters with pore sizes of?
The size of the pores should be in micrometeres.
What is the process of the filtration membrane to remove bacteria?Filtration uses membranous filters that have tiny pores that let the liquid pass through but prevent bigger particles such as bacteria to pass through the filter. Therefore, the smaller the pore, the more likely the filter is to stop more things from going through it.
There are four types of membrane are Known as Reverse osmosis, , ultrafilteration and microfilteration in order of size.
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Help asap pls 30 points bio
Kendra wishes to build a model of a carbohydrate molecule ideally containing as many monomers as possible which set should she choose
Kendra wishes to build a model of a carbohydrate molecule ideally containing as many monomers as possible. She will choose set B.
What are monomers?
A monomer is a type of molecule that has to make chemical bond with any of the molecule and can form long chain and polymer has been sequence of chain that is unspecified or unknown number of the monomers.
Monomers are considered to be smaller in size and the molecules are organic in nature that can be combined with similar the molecule to form a very large size of the molecule, or the molecule has been known as polymer.
The main example of the monomers are glucose, amino acids, ethylene, and vinyl chloride. Each monomer has been combined to form polymers in other ways.
Therefore, Kendra wishes to build a model of a carbohydrate molecule ideally containing as many monomers as possible. She will choose set B.
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Which process would most likely result in the formation of a volcano?
A central crack forms where a thin section of the earth’s crust breaks, and molten rock seeps out.
A central crack forms where a thin section of the earth’s crust breaks, and molten rock seeps out.
The earth's crust is broken into pieces.
The earth's crust is broken into pieces.
A central crack forms where a thick section of the earth’s inner core breaks, and molten rock seeps out.
A central crack forms where a thick section of the earth’s inner core breaks, and molten rock seeps out.
Heat and pressure act on igneous or sedimentary rock.
Answer:
The Earth's crust is broken into pieces
Answer:
Number 1
Explanation:
Which cell structure is responsible for making ribosomes? And where is it located?
The production and assembly of the cell's ribosomes takes place in the nucleolus, a spherical component of the cell's nucleus. Ribosomes can be seen connected to the endoplasmic reticulum or floating in the cytoplasm.
The cytoplasm of the cell contains ribosomes "freely," and they are also affixed to the rough endoplasmic reticulum. The cell nucleus provides information to ribosomes, and the cytoplasm provides building blocks. The biological machinery that produces proteins is known as a ribosome. Each cell contains several ribosomes, which are each composed of two subunits. As they move along the messenger RNA molecule's length, these two subunits read each three-letter codon after locking around the messenger RNA. Ribosomes are produced in the cytoplasm of bacterial cells by the transcription of several ribosome gene operons. In eukaryotes, the process occurs both in the cytoplasm of the cell and in the nucleolus, a section of the cell nucleus.
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The name for minimum energy expended to keep a resting, awake body alive is _______________. This represents about 60% to 70% of total energy expenditure.
Answer:
basal metabolism
Explanation:
what has “sprung up” all over phoenix and why is this a problem?
Drought has “sprung up” all over Phoenix.
How Drought has become a problem in Phoenix?About 40 million people in the southwest depend on the Colorado River for their water supply, but it is currently experiencing catastrophically dry conditions. It has been the driest two decades in 1,200 years. Phoenix is one of at least six Arizona cities that have officially declared water shortages. This desert area gets less than 8 inches of rain a year.As Phoenix and its neighbors continue their relentless development — Arizona's population has more than quadrupled in the past 50 years, from 1.8 million in 1970 to 7.2 million today — it has long been debatable how to supply enough water to sustain a city this size in the desert. The potential effects of drought on their daily life, are an increase in wildfires, a decrease in local food, and a decrease in leisure activities because of low lake water levels.How is Phoenix coping up with dry conditions?Phoenix has activated its drought management plan and is asking residents to use less water. The City of Phoenix issued a stage 1 water alert this year. With the alert, individuals are being advised to use less water in ways that won't significantly affect their daily life. One of the simplest and most efficient methods to preserve water, according to the city, is to water landscapes appropriately. The city concentrates on consumer outreach and education about the drought conditions rather than enforcement because the water reductions are voluntary.Phoenix has weathered every drought without having to impose forced water use restrictions or prohibitions thanks to long-term planning, investments in alternate water supply options, and a track record of success with water conservation.To learn more about Phoenix visit:
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What events contribute to genetic drift in the Florida panther
At the time, the Florida population was reported to be down to 30 animals, with so much inbreeding that most of the panthers were linked to each other. This has resulted in genetic issues such as poor sperm counts and improperly formed testicles, resulting in limited reproductive success.
What is the most significant cause contributing to the fall of the Florida panther population?A team of geneticists and conservation biologists determined in 1992 that the Florida panther will become extinct in 24-63 years owing to its tiny population size, and related genetic health concerns caused by inbreeding.
The introduction of additional panthers into the Florida panther population assisted in reversing the consequences of inbreeding by introducing new gene versions that concealed the detrimental effects of the recessive gene versions already existing in the Florida panther population.
The most serious dangers to Florida panthers are habitat loss, fragmentation, and degradation
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Organic farmers use the bacterium bacillus subtilis to prevent downy mildew in grapes and powdery mildew in greenhouse tomatoes. the farmers are therefore using this bacterium as a:________
Organic farmers use the bacterium bacillus subtilis to prevent downy mildew in grapes and powdery mildew in greenhouse tomatoes. the farmers are therefore using this bacterium as a Fungicide.
A tough kind of bacteria called Bacillus subtilis, sometimes referred to as "hay bacillus" and "grass bacillus," is found in soils and the gastrointestinal tracts of animals like cattle, goats, deer, and humans. It was one of the first bacterial species to undergo extensive study, and because of its capacity to withstand high and low temperatures, it is now frequently utilized in industrial, agricultural, and fermentation operations. Because Bacillus subtilis is highly competitive in the soil and frequently outperforms other soil microorganisms, it excels at preventing fungal diseases on foliage and in growing media.To know more about fungal diseases visit:
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identify what happens to light in this model of the greenhouse effect
can you help me please.
Qualitative observations are observations made with the senses; examples are taste, odor, color, texture, mood.
Quantitative observations are observations made using instruments like thermometer; examples include volume, mass, temperature, distance, height, etc.
What are observations?Observations refer to the features of an object or an event that can be measured as a result of the changes or differences between these features.
In the scientific method of discovery, the first method involves observation.
Observations then leads to questions whose answer are then sought for through hypotheses and experiments.
There are two types of observations in science:
qualitative observations, andquantitative observationsQualitative observations are those observations which are made using the senses of sight, smell, touch, taste, and hearing.
Examples of qualitative observations include; taste, odor, color, texture, mood.
Quantitative observations are observations which can be expressed in terms of numbers and are measured using instruments such as thermometers, rulers, balances, etc.
Examples of quantitative observations include volume, mass, temperature, distance, height, etc.
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