If you were asked to use a light microscope to locate specific molecules in a cell, fluorescence would be the best form of light microscopy to use.
What is light microscopy?Modern cell biology relies heavily on light microscopy as a technique. The resolution of light microscopy is well matched to the sizes of subcellular structures, a wide variety of fluorescent probes are available for marking proteins, organelles, and other structures, and living cells can be imaged for extended periods of time to follow their dynamics. These characteristics make light microscopy the ideal tool for imaging biology in living cells.
Fluorophores, which are molecules that absorb one wavelength of light (the excitation wavelength) and emit a second, longer wavelength of light, are used in fluorescent microscopy (the emission wavelength).
The correct answer is Option d) fluorescence.
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you are studying a chromosome in a new animal species. the presence of what element would make you most confident that a region is facultative heterochromatin and not constitutive heterochromatin?
Option b The presence of H3K27me element would make you most confident that a region is facultative heterochromatin and not constitutive heterochromatin.
Eukaryotic genomes contain heterochromatin, which serves a variety of purposes including limiting DNA replication and repair and silencing of gene expression. Heterochromatin separates from euchromatin spatially within the nucleus and is preferentially positioned around the nucleolus and nuclear periphery. In contrast to euchromatin, which is less condensed, richer in genes, and more readily transcribed, heterochromatin is highly condensed, gene-poor, and transcriptionally silent (Huisinga et al. 2006). Differentiating euchromatin from heterochromatin are nucleosome changes. The active transcription of DNA into mRNA products occurs in the presence of euchromatin. Gene regulatory proteins and RNA polymerase complexes can attach to the DNA sequence thanks to the unfolded structure, which can then start the transcription process. The distal arms of chromosomes include euchromatin, which is present in a decondensed form. Typically, it is spread out all across the nucleus.
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nonribosomal peptide antibiotics are produced by choose one: a. making chorismate from erythrose 4-phosphate. b. condensation of amino acids by modular enzymes into longer molecules. c. condensing glutamate and acetyl-coa, then adding amino groups through transamination. d. converting aspartate into a ring with pprp, then adding the ribose phosphate.
Nonribosomal peptide antibiotics are produced by condensation of amino acids by modular enzymes into longer molecules.
Explanation:
Nonribosomal peptide antibiotics are produced by condensation of amino acids by modular enzymes into longer molecules. Arginine is produced by glutamate and acetyl-CoA, then adding amino groups through transamination, then releasing fumarate. Aromatic amino acids are made by making chorismate from erythrose 4-phosphate, then modifying the product. Pyrimidines convert aspartate into a ring with PPRP, then adding the ribose phosphate.
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What is the difference between a single and double circulatory system?
Answer:
︎︎ What is the difference between a single and double circulatory systems ?➪Single circulation The type of circulatory system that occurs in fishes, in which the blood passes only once through the heart in each complete circuit of the body Compare double circulation.➪Double circulation (double circulatory systems) are circulation systems in which blood flows through the heart twice.➪In the case of double circulation, pulmonary circulation - i.e. blood flow between the heart and lungs, is separate from systemic circulation - i.e. movement of blood from the heart through the rest of the body (excluding the lungs), then back to the heart.Difference ☟︎︎︎ ➪During one complete cycle of flow through the whole body (blood system), blood in a double circulatory system passes through the heart twice.Another way to say this is the blood passes through the heart twice during each cycle of the circulatory process.➪In a double circulatory system there are two circuits for blood passing through the heart:Pulmonary CirculationDeoxygenated blood is pumped from the heart to the lungs, oxygenated blood returns to the heart from the lungs.Systemic Circulation.Explanation:
︎︎︎In short :-➪The key difference between single and double circulation is that in single circulation, blood travels once through the heart during a complete cycle, while in double circulation, blood flows twice through the heart during a complete cycle.
Please help I need to turn it please
If fertilisation has not taken place, the lining of the uterus breaks down. What is the name given to this process?
Answer:
Menses, menstruation, period, cycle whatever you want to call it
Explanation:
If each dose of growth product increases the height of the organism, how many phenotypes for height could exist in the population?.
Scientists estimate that 80 percent of a person's height is determined by the DNA sequence variations that they inherit.
Human height is a composite phenotype of the sum of head, trunk, and leg lengths. Almost 10,000 common gene variants influence how tall a person becomes. For height, DNA is largely a destiny. Studies of identical and fraternal twins suggest that up to 80% of variation in height is completely genetic.
In genetics, phenotype is the set of observable traits of an organism. This includes organism's physical form and structure, developmental processes and its behavior
Although there is a range of phenotypes, but offspring are similar in color to the parents. If we assume n = the number of gene pairs, then (2n + 1) determine the total number of categories of phenotypes.
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The process of reading a dna strand and making a complementary dna copy of that strand is called.
The process of reading a DNA strand and making a complementary DNA copy of that strand is called Replication.
What is the name of the process of copying DNA?DNA must be duplicated when a cell splits into daughter cells because it houses the genetic code for an organism. Replication is the process of copying DNA. One double-stranded DNA molecule can produce two identical DNA helices through the process of replication.
What is the initial stage of DNA replication?Step 1: Formation of Replication Forks The double-stranded molecule of DNA needs to be "unzipped" into two single strands before it can be copied. Adenine (A), thymine (T), cytosine (C), and guanine (G) are the four bases of DNA that pair up between the two strands.
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Using this phospholipid bilayer cross-section diagram as a reference, which
letter best represents an integral protein that spans the membrane?
A
B
C
D
E
F
G
A phospholipid bilayer—two phospholipid layers with the tails pointing inward—is typically seen in biological membranes. In this phospholipid bilayer cross-sectional graphic, A stands for the phospholipid unit. hydrophilic head (A1) and hydrophobic tail (A2) C is Glycopro.
What are the phospholipid bilayer's two components?
The phospholipid bilayer is made up of two phospholipid layers: an internal layer that repels water and an outside layer that attracts it. The single phospholipid molecule shows the hydrophilic (polar) head group and hydrophobic tails (fatty acid chains). Two sheets of phospholipid molecules, each with all of its molecules aligned in the same direction, make up a bilayer. The phospholipids of the two sheets align in an aqueous medium.To learn more about Phospholipid refer to:
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Uranus' rings__
A -Circle the planet's poles
B-Are visible from Earth with a telescope
C-Are almost vertical
D -All of the above
Answer:
D
Explanation:
Uranus is known as the "planet on its side" because unlike Saturn, its rings are vertical. Because the planet itself is not actually tipped, the rings circle around its north and south pole. We know this because we have been able to see them ourselves through telescopes here on Earth. This covers all of the answer choices, so the answer is all of the above.
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After comparing the sounds of the conga and timbales, which do you prefer and why?
After comparing the sounds of the conga and timbales, the sound that i prefer is the conga because it comes out like an open tone that tends to ring after a person must have hit it.
What is the Conga sound about?Congas have a low, pleasant tone because of their profound depth. The full hand is more frequently used to create congas. Timbales can have a depth of up to 16 inches. Timbales offer richness to songs in the Latin music heritage with their clear, booming tone.
Note that playing the congas demands a specific technique, which you may master with practice, despite the fact that it may seem like a straightforward instrument to pick up.
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in using the muscle control formula, if the effect of the external force is in the same direction as the actual movement, what is the next thing to determine?
The movement's speed must be established. A step-by-step process for identifying the participating muscles and their action for any joint movement is provided by the muscle control formula that follows.
At first sight, this muscle control formula could seem a little difficult and complicated. But with some practise, you ought to be able to do it quickly. Once the technique is automatic and instinctual (after enough practise), you will be able to analyse movements without thinking about each step in the method. However, until you acquire these movement analysis instincts, using the muscle control formula is helpful. We state the issue before introducing the muscle control formula: Describe the name of the movement (or position), the plane of movement, the impact of the external force acting on the system, the type of muscle action (e.g., shortening or concentric, lengthening or eccentric, or isometric), and the muscles involved in the movement (or position), given a specific joint movement (or position).
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Please answer the blanks I have to say it out loud on a recording HELPPPP
What type of cell transport allows neurons in the nervous system to communicate and what mechanisms (including organelles) are involved in transmitting electrochemical signals between neurons?
PLSSSSS HELPPPP MEEEEE
Answer:
En general, el transporte celular se divide en dos tipos: pasivo y activo. El transporte pasivo significa simplemente que no se usa nada de la energía de la célula; el transporte activo, en contraste, requiere el uso de la energía celular
The ________ lobes are responsible for voluntary movement, thinking, personality, and purposeful actions.
The Frontal lobes are responsible for voluntary movement, thinking, personality, and purposeful action.
The frontal lobes are the largest lobes in human brain and also the most common region of injury in traumatic brain injury. They are important for voluntary movement, expressive language and for managing higher level functions.
Overall, frontal lobe is responsible for higher cognitive functions such as memory, emotions, impulse control, problem solving and social interaction. Damage to the tissues of the frontal lobe can cause personality changes and difficulty in concentrating.
If it is damaged, there might be no mechanism of braking for self-control. A person may find it difficult to control his/her anger or aggression.
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which of the following statements about the genetic code is correct? group of answer choices all codons specify more than one amino acid. the genetic code is redundant. all codons specify an amino acid. all amino acids are specified by more than one codon.
The correct answer is . all amino acids are specified by more than one codon.
What is genetic code?
The phrase "genetic code" refers to a gene's instructions to a cell on how to make a specific protein. The four nucleotide bases of DNA, adenine (A), cytosine (C), guanine (G), and thymine (T), are employed in various ways by each gene's code to form three-letter "codons" that specify which amino acid is necessary at each position within a protein.
Genetic material the history of the genetic code relates the hopes and dangers of biology and genetics throughout the 19th, 20th, and 21st centuries. For instance, Oswald Avery put an end to more than 80 years of fruitful conjecture in 1944 when he demonstrated that the genetic code—that is, DNA—was in fact the carrier of hereditary information. However, despite how crucial DNA was to the so-called heroic era of molecular biology, which covered the generation of scientific advancement following World War II, and how crucial DNA is to the ground-breaking sciences of genetics and genomics, neither genes nor DNA can determine who you are or what you will do.
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which sequence represents structures organized from most complex to least complex
The correct sequence that represents structures organized from the most complex to the least complex is oak tree-leaf- guard cell- chloroplast.
A tissue is made of groups of the same kind of cells with a common structure and function. An organ is a structure that contains at least two different types of tissue functioning together. These are called level of organization .
In plants the cells have cell wall which is the more complex , hence it is considered as most complex structure .The body of a multicellular organism, such as a tree or a cat, exhibits organization at several levels that includes tissues, organs, and organ systems .
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Usually during axial muscle contraction, the more moveable muscle attachment, the ______ attachment is pulled toward the less moveable muscle attachment.
Every skeletal muscle in the human body is connected to a bone or other connective tissue structure, and each one crosses at least one joint. Typically, we describe muscle attachments by identifying their origin and insertion point.
The origin is the point at which the muscle attaches to an immovable or less movable bone - the point at which the muscle is anchored to the bone. The insertion is the point at which the muscle attaches to the movable bone. When a muscle contracts, the insertion is typically pulled towards the origin, resulting in movement.
Some muscles cross more than two joints, making their action more complicated. Depending on the action, other muscles have interchangeable origins and insertions. As a result, it is critical to consider the type of movement a muscle can perform when describing it.
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Answer: superior
Explanation:
12. The activity of all human body systems is coordinated by (1) the secretion of hormones and the nervous system (2) the interaction of nerve impulses with the excretory system (3) the movement of digested food by the circulatory system (4) the secretion of hormones and the circulatory system
Answer: 1
Explanation:
The secretion of hormones and the nervous system give information or signals to the rest of your body. believe it or not our bodies are not smart and without our hormones and nervous system our organs and systems would just stop.
Which statement best reflects aerobic respiration?
a. Aerobic respiration uses oxygen and produces carbon dioxide, water, and energy.
b. Aerobic respiration does not use oxygen and produces carbon dioxide, water, and energy.
c. Aerobic respiration uses oxygen and produces carbon dioxide, ethanol, and energy.
d. Aerobic respiration does not use oxygen and produces carbon dioxide, ethanol, and energy.
Answer:
A) Aerobic respiration uses oxygen and produces carbon dioxide, water, and energy.
Explanation:
[tex]\Large \boxed{\sf A}[/tex]
The chemical process known as aerobic respiration uses oxygen to convert carbohydrates into energy.
Aerobic respiration produces carbon dioxide and water.
What is the advantage of traveling in a herd for the gazelles?
Answer:
Protect each other from predators.
Explanation:
Describe a problem with the Eurasian Beaver ecosystem, most likely from a human impact.
Explain how scientists have attempted to solve the Eurasian Beaver issue
Evaluate their solution by providing 2-3 pros and cons. Think about the different groups of people that are affected by the solution
A problem that is common with the Eurasian Beaver ecosystem, most likely from a human impact is the hunting of men that made them to come to a near-extinction.
Explain how scientists have attempted to solve the Eurasian Beaver issue?Note that Beavers are said to be threatened in terms of habitat loss as well as conflict with humans. If a person is residence inside of the beaver habitat, it is advisable to proven coexistence techniques such as:
Lower pesticide use.Channel runoff into waterways as well as wetlands.The pros are:
Better habitat.Encourage more birth of Beavers.The cons are:
Lost of habitat.Extinction of Beavers.Therefore, as a keystone species that supports the ecology it lives in is the Eurasian beaver. It produces wetlands that serve as homes for animals including the European water vole, the Asian otter, as well as the Asian water shrew.
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How has the introduction of the Asian Tiger Mosquito impacted human society (“Social Effects”).
Tiger mosquitoes are associated with the transmission of many human diseases, including viruses such as dengue fever West Nile fever, and Japanese encephalitis.
In Asia, this species is the vector of dengue fever and Japanese encephalitis. Laboratory studies have shown that tiger mosquitoes are efficient vectors for many viral pathogens including yellow fever West Nile virus, St. Louis encephalitis, and La Crosse encephalitis. Asian tiger mosquitoes were introduced to the United States. Tire casings are imported for remanufacturing.
Due to the movement of tire casings, this species has spread to more than 20 states since 1985. Asian tiger mosquitoes were introduced to the United States. Tire casing imported for remanufacturing. This species carrying tire casings has spread to more than 20 states since 1985. Tiger mosquitoes are important vectors in Asia. Tiger mosquitoes can transmit viruses such as dengue chikungunya and zika to humans.
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2. At which position might the Moon block part of the Sun, making a solar eclipse visible
from Earth?
(1) 7
(2) 2
(3) 9
(4) 4
Answer:
(1) 7 a
Explanation:
Locard's exchange principle implies all of the following except
blood spatter can be used to identify blood type
animal hair can transfer from an animal to your pants
soil from the yard can enter your home on your shoes
fibers from one person can attach to other people's clothes
The Locard's exchange principle implies all of the following except option A: blood spatter can be used to identify blood type.
What is implied by the exchange principle of Locard?Every interaction leaves a trace is a thesis put out by French forensic science pioneer Edmond Locard. The foundation of all forensic science as we know it today is this idea, which became known as Locard's exchange principle.
Therefore, Locard's Exchange Principle, which essentially states that in the commission of a crime, the offender leaves something at the crime scene and takes away something from the crime scene, is one of the guiding notions in classic, CSI-style forensics.
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Answer:
(A) blood spatter can be used to identify blood type
Explanation:
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Select all of the following that are components of DNA. (Check all that apply.)
cardiorespiratory fitness is important because it multiple choice question. stretches the small muscles of the body. rests the heart and lungs while exercises are performed. allows the blood to carry oxygen and nutrients to the body. blocks the body's glands from producing hormones.
cardiorespiratory fitness is important because allows the blood to carry oxygen and nutrients to the body.
The intensity of your workout and oxygen use are measured using metabolic equivalents (METs). They gauge energy use when at rest.
Maximum oxygen uptake (VO2 max) and how it is utilised during vigorous exercise are the two factors used to gauge cardiorespiratory endurance. Increased oxygen uptake indicates that your cardiorespiratory system is operating effectively and that you are using more oxygen. VO2 tests are often performed in a lab, hospital, or clinic with the assistance of a clinician or exercise physiologist. With a certified fitness teacher, you can perform submaximal testing.
Your cardiorespiratory endurance is assessed using submaximal exercise tests. Your cardiorespiratory endurance may be enhanced with the help of these exercises. They can be performed anytime, anywhere, and don't require a lot of equipment.
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Why do you think we know very little about the mantle
We know very little about the mantle because-
For humans, creating a picture of the mantle is very challenging. It is difficult to send a robotic or human mission to the mantle (Earth's core) to observe and gather additional evidence in order to further our understanding of its existence because of the mantle's extreme temperature.
What is Mantle?A mantle is a layer inside a planetary body bordered below by a core and above by a crust. Typically the thickest and most massive layer of a planetary body, mantles are composed of rock or ice. Planetary bodies that have undergone differentiation by density are known to have mantles. Mantles are found on all planetary moons, all terrestrial planets (including Earth), and a number of asteroids. Silicate rock makes up the Earth's mantle, which lies between the crust and the outer core. Its 4.01 x 1024 kg mass is 67% that of the Earth. It makes up about 84% of the Earth's volume and has a thickness of 2,900 km (1,800 mi). Although it is mostly solid, in geological time it behaves like a viscous fluid.
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rank hemoglobin molecules with the described conditions from most likely to bind oxygen molecules to most likely to release oxygen molecules. (for help approaching this problem, open hint 1.)
Highly likely : 3 Bound oxygen,PO2=100mmHg ,PO2=40mmHg
Bound O2 in 1, PO2=100mmHg
Most unlikely : Bound O2 in 1,PO2=40mmHg
The four heme groups in hemoglobin include four iron atoms that act as binding sites for oxygen molecules. A Hb tetramer can thus bind four oxygen molecules. According to the molecular weight of Hb, 1.39 ml of oxygen can mix with 1 g of Hb. The actual oxygen-binding capacity of hemoglobin (CHb) is 1.34 ml O2 per gram Hb, however portion of the Hb ordinarily found in red blood cells is unable to do so (it is either metHb or HbCO). Since there are approximately 15 g of Hb in 100 ml of blood, that amount of blood may bind 20.1 ml of oxygen. The blood's ability to bind oxygen is known as this amount (CB).
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Some snakes have a pelvis and femurs, bones used for walking, although they no longer need them. What term best describes this situation?
Answer:
Vestigial organs or vestigial structures
Explanation:
Vestigial organs or vestigial structures are organs, tissues or cells in a body which are no more functional but their structural remains still exist in the body. They are evidence of evolution in a specie.
Be able to explain how water moves in the water cycle.