Answer:
A phosphate group, a sugar group, and one of four types of nitrogen bases
Explanation:
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group, and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.
A higher number of gene copies makes CRISPR editing more challenging, as one needs to ensure that all copies of that gene are edited. How does CRISPR-Cas9 help overcome this difficulty?
The CRISPR-Cas9 system has several features that make it a powerful tool for gene editing, even when there are multiple copies of a gene that need to be edited.
What is Genes?
Genes are segments of DNA (deoxyribonucleic acid) that carry the genetic information that determines the characteristics and traits of an organism. They are the basic unit of heredity and contain the instructions for the development, function, and reproduction of all living things.
When there are multiple copies of a gene in a cell or organism, it can be challenging to ensure that all copies are edited using CRISPR. However, the CRISPR-Cas9 system has several features that help overcome this difficulty:
Specificity: CRISPR-Cas9 can be designed to target a specific DNA sequence, allowing for precise editing of specific copies of a gene.
High efficiency: CRISPR-Cas9 can target multiple copies of a gene simultaneously, increasing the chances of all copies being edited.
Multiplexing: CRISPR-Cas9 can be designed to target multiple genes or sequences simultaneously, which can be useful when there are multiple copies of several genes that need to be edited.
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Bacteria, like most forms of life use ___ to reduce the activation energy of metabolic reactions.
select all correct answers
Bacteria, like most forms of life use ___ to reduce the activation energy of metabolic reactions.
select all correct answers
catalysts
resonance structures
entropy
photons
enzymes
Answer:
Catalysts, enzymes
Explanation:
Catalysts are known for reducing the activation energy of a reaction thus increasing the reaction rate.
Enzymes are a type of catalyst.
Type the correct answer in the box. Spell all words correctly.
What is a close relationship between two organisms that live together called?
The close relationship between two organisms that live together is called
Reset
Next
Answer:
symbiosis.
Explanation:
The term that you are referring to is symbiosis. (a symbiotic relationship)
Symbiosis is a proximate and often long-term interaction between two or more different biological species.
Explain the relationship between crossing over and genetic variation
Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. It is obviously another source of genetic variation in offspring.
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Why is art a fun class to take.
Art class provides a creative outlet for self-expression and allows students to develop their imagination, critical thinking, and problem-solving skills in a fun and engaging way.
What is an art class?Art class provides a creative outlet for students to express themselves and unleash their imagination. It allows them to explore different mediums, techniques, and styles, and to experiment with color, form, and texture. In art class, there is no right or wrong answer, and students are free to experiment and make mistakes.
The class also encourages critical thinking, problem solving, and communication skills, as students learn to discuss and analyze works of art. Art class is a place where students can forget about their other classes and just have fun making art.
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Amanda hates her new student ID photo. Her hair looks dry, the extra weight she's gained shows, and her neck looks fat. Amanda's also been feeling very tired and mentally dull. Amanda goes to the clinic where you are working. You draw her blood. The test results show her T4 levels are low and her TSH levels are low. Later she is given a TSH stimulation test in which TSH is injected and the T4 levels are monitored. After TSH injection her 14 levels rise. A) Does Amanda have problems with her pituitary or with her thyroid gland? B) How did you come to your conclusion?
Answer:
A) Pituitary Gland B)By analysing the given observations in the question.
Explanation:
THS, thyroid stimulating hormone, is an hormone produced by the pituitary gland and in return it stimulates the thyroid gland that produces hormones such as T3 and T4.
We can conclude from the given information that Amanda's thyroid gland does not have a problem with producing and secreting the T3 and T4 hormones when THS is present in her body.
But the low THS levels show that the problem is with her pituitary gland causing her to have low levels of THS.
We can reach this decision by analysing the given information.
I hope this answer helps.
critically discuss the transport mechanisms across the membrane
Diffusion, osmosis and active transport.
Explanation:
. Diffusion is the movement of substances from a region of high concentration to a region of low concentration across the membrane.
.Osmosis is the movement of water molecules from a hypotonic solution to a hypertonic solution across the membrane.
.Active transport is the movement of substances from a region of low concentration to a region of high concentration across the membrane with the utilization of energy.
What is the structure of a nucleotide? What are DNA's four nucleotides, and how do they pair up?
Answer:
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
What is the symbol of the element with 28 protons in its nucleus?
when scientists have made many observations and collected existing data, they suggest a possible explanation for what they have seen and recorded. this explanation, called a hypothesis, is a statement that both explains their observations and data and can be tested. hypothesizing is a very important step in scientific investigations. a statement is testable if evidence can be collected that either supports or disproves it. a hypothesis may be shown to be wrong, but it can never be proved true beyond all doubt. it can only be supported by evidence. at any time, new data might indicate that a previously accepted hypothesis does not hold true in all instances. scientists often must refine and revise their original hypotheses—or even discard them—as they uncover new evidence. to test a hypothesis, scientists make a prediction that logically follows from the hypothesis. a prediction is a statement made in advance that states the results that will be obtained from testing a hypothesis, if the hypothesis is true. a prediction most often takes the form of an “if-then” statement. a hypothesis is often tested by carrying out an experiment. experimenting is the process of testing a hypothesis and its predictions by gathering data under controlled conditions.
Question
1- What key vocabulary terms are contained in this passage?
2- give the meaning of these terms.
The chapter gives definitions for essential terminology used in scientific inquiry, such as hypothesis, testable, evidence, revision, prediction, and experiment, as well as information on their relevance.
What might possibly account for an observation that can be verified by science?A hypothesis is a speculative explanation that can be verified by more research. A hypothesis is a well-supported explanation for the findings.
What is an observation's hypothesis?After making an observation, a scientist tries to explain what they have noticed. An explanation for an observation is a hypothesis. Always take into account at least one alternative. The alternative theory postulates that a certain cause leads to a particular effect.
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what is the difference between cork formation and gum formation in the plants as an immune mechanism
Answer:
Cork formation is a type of secondary growth that occurs in the stems and roots of woody plants. Gum formation, on the other hand, is a type of defense mechanism that occurs in response to injury or infection.
Explanation:
true or false
ATP is the primary source for energy for cells.
Answer:True
Explanation:The mitochondria is the powerhouse of the cell and it converts chemicals that you get from food into ATP. ATP is then shipped out and used for energy. Hope this helps:D
list the three categories of mollusks and give an example of a commonly used food from each category
include gastropods slugs and snails. They crawl by using their foot. Bivalves. A few examples of bivalves are clams, scallop, oysters, and mussels. Cephalopods.
What are the four traits of gastropods?In general, gastropods have a big foot with a flat bottom for walking, a single coiled casing and encases the soft body, and just a head with two eyes and tentacles. However, because to their diversity, some species lack shells while others, like bivalves, have two-part shells.
What is gastropod?gastropod. noun. gas·tro·pod ˈgas-trə-ˌpäd. : any of a large class of mollusks (as snails) that have a muscular foot at the bottom and usually both a distinct head bearing sense organs and a spiral shell into which the body can be withdrawn.
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An area of the teenager’s brain that is fairly well-developed early on is the nucleus accumbens. What does this area of the brain do?
Select one:
a.
Used for problem solving.
b.
It allows learning and creativity.
c.
Seeks pleasure and reward.
d.
Seeks understanding and communication.
Which term best describes the difference in colors of the birds below? 4 birds are shown. One has light brown feathers with darker wings. One has very dark feathers with lighter wings. Another has medium brown feathers with light wings. The last one has medium brown feathers with very dark wings. natural selection reproductive maturity genetic variation genetic drift Mark this and return
Answer:
genetic variation
Explanation:
Genetic variation refers to the difference in genetic content of organisms within a population. The genetic makeup of living organisms are made up of GENES, which exists in contrasting pairs called ALLELES. Each allele is responsible for variation in traits exhibited by the organisms. Differences in the allelic content of organisms of the same species leading to the display of varying phenotypic characteristics is referred to as GENETIC VARIATION.
This is the case in the example given in which four birds in a population possess a range of wing and feather colors i.e light brown feathers with darker wings, dark feathers with lighter wings, medium brown feathers with light wings, and medium brown feathers with very dark wings, all resulting from a variation in their genetic content. Hence, this is an example of GENETIC VARIATION.
Answer: C. Genetic variation
Explanation: :)
Which of the following are features of nucleosomes? A nucleosome contains approximately 20 base pairs of DNA. The DNA in a nucleosome is wound around eight histone proteins. Between nucleosomes is a stretch of DNA called "linker DNA". A nucleosome contains 8 different types of histones. In a nucleosome, DNA is wrapped 4 times around the histone core. H1 seals off where DNA enters and leaves the nucleosome. Nucleosomes contribute to DNA packing. Nucleosomes in chromatin are arranged in straight, side-by-side chains. Nucleosomes are about 10000 Angstroms in diameter. Histones have tails that stick out and can be modified, affecting DNA expression.
Answer:
The correct answers are "The DNA in a nucleosome is wound around eight histone proteins", "Between nucleosomes is a stretch of DNA called "linker DNA", "H1 seals off where DNA enters and leaves the nucleosome", "Nucleosomes contribute to DNA packing", and "Histones have tails that stick out and can be modified, affecting DNA expression".
Explanation:
Nucleosomes are comprised of DNA and histones that in conjunction form structural units of the chromosomes. The DNA in a nucleosome is wound around eight histone proteins, which are known as the histone octamer. Between nucleosomes is a stretch of DNA called "linker DNA", which is an unwrapped DNA that can be between 10 to 50 base pairs long. H1, one of the four types of histone, seals off where DNA enters and leaves the nucleosome serving as an anchor to the complex. Nucleosomes contribute to DNA packing by wrapping the DNA and forming the structural units of the chromosomes. Histones have tails that stick out and can be modified, affecting DNA expression; which are known as "histone tails" located in the N-terminal side and where higher order structures are arranged.
Let’s review the normal baroreceptor reflex. Drag the labels onto the figure to create a flow chart of how the baroreceptor reflex would respond to decreased mean arterial pressure. View Available Hint(s)
Mechanoreceptors known as baroreceptors enable the autonomic nervous system to communicate information generated from blood pressure.
Thus, Baroreceptors come in two varieties: low-pressure volume receptors and high-pressure arterial baroreceptors, both of which are triggered by stretching of the vessel wall.
Carotid sinuses and the aortic arch both include arterial baroreceptors. The atria, ventricles, and pulmonary vasculature all include low-pressure volume receptors (also known as cardiopulmonary receptors).
When you experience something that raises or lowers your blood pressure, the baroreceptor reflex keeps it constant. Your blood pressure is swiftly returned to normal range after a complicated sequence of procedures.
Thus, Mechanoreceptors known as baroreceptors enable the autonomic nervous system to communicate information generated from blood pressure.
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state the steps in preparing organic manure
below are the steps in preparing organic manure:
Collect organic materialMix the organic materialAdd waterCompostingStorageWhat are the procedures for making organic manure?The process of creating this beneficial fertilizer may seem daunting at first glance but rest assured its quite straightforward; collect any biodegradable waste such as wood chips or egg shells then add them into a compost bin or pit alongside other suitable materials such as vegetable clippings.
Be sure to turn the mixture occasionally until it has fully decomposed - once complete your plants will flourish like never before thanks to their newfound source of nutrients.
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Describe the three patterns of communication
The three patterns of communication include:
Verbal CommunicationThe most evident kind of communication would appear to be verbal communication. It makes use of spoken language, either in-person or over the phone. Although most encounters need verbal communication, there are other nonverbal indicators that can add to the meaning of the words themselves. A more sophisticated message is conveyed when spoken language is combined with nonverbal communication.Non-verbal CommunicationThe use of body language might reveal some information about a speaker's word choice. It can reflect sarcasm, complacency, dishonesty, or sincerity. Body language, including the speaker's posture, hand gesture, facial expressions, and even look, is a common way to communicate these things. A untidy speaker with wrinkled clothes and slouching posture, for example, might convey a lack of assurance or knowledge. Visual Communication Signs, maps, and drawings, as well as color and graphic design, are all examples of visual forms of communication. These frequently support verbal communication and aid in proving a point. Visual aids can aid in the presentation of the message by helping the speaker remember key points, providing the audience with something to look at, and more.Learn more about communication here:
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recal what you know about the functions of the skeletal system to complete the following questions
The skeleton provides a framework for ⇒ muscle and soft tissue attachment.
Name one organ protected by the ribcage. ⇒ Heart, lungs, liver
Blood is formed in the:
red bone marrow.Calcium is released and deposited in the bones and blood to maintain homeostasis. calcium, phosphorus, minerals, fat is stored in the bones.When muscles: ⇒ contract, the bones attached to them move.
What is the skeletal systemThe bony structure of the skeleton serves as a foundation for providing support and attaching soft tissues. The heart is safeguarded by the ribcage.
The bone marrow is responsible for producing blood. In order to keep the body in balance, calcium is discharged and stored in both the bloodstream and bones. The bones serve as a storage site for calcium. The movement and locomotion of the body occurs as a result of bones connected to contracting muscles.
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See full text below
Recall what you know about the functions of the skeletal system to complete the following questions. The skeleton provides a framework for and soft tissue attachment. Name one organ protected by the ribcage. Blood is formed in the bone marrow. is released and deposited in the bones and blood to maintain homeostasis. is stored in the bones. When muscles , the bones attached to them move.
describe what the first terrestrial plants looked like
The first terrestrial plants had adaptations that allowed them to live outside water, such as cellulose in their cell wall, which gave them support and protection, an impermeable external layer called the cuticle, and the presence of pores called stomata that allowed gas and water exchange regulation.
First terrestrial plants were probably similar to liveworts, nonvascular plants. There are not many fossils of the first plants, except for their spores, which had protective coatings that allowed them to survive in their new dry environment.
What two stages of aerobic cellular respiration can we rule out as steps not affected by rotenone?
Based on this mechanism of action, we can rule out the first two stages of aerobic cellular respiration, which are glycolysis and the citric acid cycle).
What is retonone?Rotenone is a pesticide that inhibits the activity of complex I in the electron transport chain of aerobic cellular respiration. As a result, the flow of electrons from NADH to complex III is blocked.
Glycolysis takes place in the cytoplasm of the cell and does not require oxygen or the electron transport chain. It is the breakdown of glucose to produce two molecules of pyruvate, two molecules of ATP, and two molecules of NADH.
Rotenone does not affect glycolysis because it inhibits the electron transport chain, which is a later stage of aerobic cellular respiration.
The citric acid cycle takes place in the mitochondria of the cell and requires oxygen and the electron transport chain to function. It is the breakdown of pyruvate to produce CO2, ATP, and NADH.
However, rotenone does not affect the citric acid cycle directly because it inhibits complex I, which is not directly involved in the citric acid cycle. However, without functional complex I, the NADH produced by the citric acid cycle cannot be oxidized to produce ATP through the electron transport chain, ultimately leading to a decrease in ATP production.
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The first organisms to move into an area after a primary disturbance are
Answer:
Small Organisms that can reproduce faster than others
The community in an ecosystem is always stable and unchangeable. True or false
Answer:
The answer is false.
Explanation:
In science, nothing is permanent, especially in biology. An ecosystem can be stable, but it is never indefinitely so.
The community in an ecosystem is always stable and unchangeable is false
What is the ecosystem?The community in an ecosystem is not always stable and unchangeable. Ecological communities are dynamic and constantly changing due to various factors such as natural disturbances like wildfires or human activities such as deforestation, pollution, or introduction of invasive species.
Therefore, These factors can lead to changes in the species composition and interactions within the community, which can have far-reaching consequences for the functioning of the ecosystem as a whole. Therefore, ecological communities are not static, but rather they are constantly changing in response to various biotic and abiotic factors.
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During respiration, most ATP is formed as a direct result of the net movement of potassium against a concentration gradient potassium.
a. True
b. False
Answer:
b. False
Explanation:
All living organisms such as plants and animals require energy to function properly (life activities). Thus, the organelle where energy from nutrients is released is generally referred to as mitochondria. Animals retrieve energy using mitochondria to do cellular respiration because they typically act like a digestive system by taking in nutrients, breaking them down and obtaining energy rich molecules for cell-life activities.
Cellular respiration can be defined as a series of metabolic reactions that typically occur in cells so as to produce energy in the form of adenosine triphosphate (ATP). During cellular respiration, high energy intermediates are created that can then be oxidized to make adenosine triphosphate (ATP). These intermediary products are produced at the glycolysis and citric acid cycle stage.
Basically, mitochondria is one of the cell organelles found in all living organisms and it is known as the powerhouse. Therefore, mitochondria provides all the energy required in the cell by transforming energy forms through series of chemical reactions; breaking down of glucose into Adenosine Triphosphate (ATP) used for providing energy for cellular activities in the body of living organisms.
Hence, during respiration, most ATP is formed as a direct result of the net movement of protons down a concentration gradient but not potassium against a concentration gradient potassium.
describe why rocks found at the bottom of the river are smooth and flat.Please in your own words,My teacher would get mad
The rocks found at the bottom of a river smooth and flat because those are collides with each other.
Explanation:
At the bottom of the river, the rocks which are found are very smooth and the shape of these rocks are flat because the rocks at the bottom collide with each other.
This results in the chipping off parts of the rocks and this results in the surface of the rock to become smooth and becoming flat. Moreover the sand found at the bottom acts as a sand paper creating resistance and smooth-ens the rocks at the bottom of the river.
Abrasion, which is the physical wearing away of a material by friction, is the process that results in the formation of smooth and flat rocks often found at the bottom of rivers.
What is Abrasion?Abrasion is the process of rubbing or scraping away a material, by rubbing against a rough surface or causing friction. This type of mechanical weathering can be brought about by a variety of things, including wind, water, snow, and human action. Rock, metal, plastic and wood are some of the materials that may be subject to abrasion.
This may result in material loss and modification of the appearance and texture of the surface. Natural features such as the smoothness of river boulders or the roundness of pebbles on a beach can also be the result of friction. Sandblasting, grinding and polishing are some examples of industrial abrasive applications.
Therefore, Abrasion, which is the physical wearing away of a material by friction, is the process that results in the formation of smooth and flat rocks often found at the bottom of rivers.
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1.Do you think you can carry genes for traits you can’t physically see in yourself? For example, you may have brown eyes- can you carry genes for another color though?
2.How do you think it is possible to get pink flowers? Say you have one white and one red flower of the same species? Is it possible to get pink offspring? What factors do you think are at play?
Answer:
1. yes
2. I'm pretty sure thats how it works don't take my word for it
Explanation:
you carry genes to pass to your children
BLANK are fatty acid derivatives that function in inflammatory and allergic reactions, blood clotting, and smooth muscle contractions.
The answer is lipids
How to tell if a cat really has feelings for you or just to eat?
Answer:
if tge cat doesnot come to you when you dont give it food it means he loves food not u
Answer:
lets see
Explanation:
one the place a food near you and if the cat looks down the food with out looking at you then you understand he loves food
possible reasons for differences in enzyme activity
There can be several reasons for differences in enzyme activity, including temperature, pH, enzyme concentration, substrate concentration, and the presence of inhibitors or activators.
Enzymes are biological catalysts that accelerate chemical reactions in the body. The rate of enzyme activity can be affected by various factors, such as temperature and pH. Each enzyme has an optimal temperature and pH range at which it functions best. Deviations from this range can cause the enzyme to denature or lose its shape, leading to a decrease in activity.
Changes in enzyme concentration can also affect activity. An increase in enzyme concentration generally leads to an increase in activity, while a decrease in concentration leads to a decrease in activity. The rate of enzyme activity can also be affected by substrate concentration.
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