Which type of microscopy is used to view the internal structures of a specimen? transmission electron scanning electron atomic force light confocal fluorescence
Answers
Transmission electron microscopy (TEM) is used to view the internal structures of a specimen. Option A.
It is a type of electron microscopy that uses a focused beam of electrons to form images of the specimen on a fluorescent screen or on a photographic film. In this technique, the electrons pass through a thin section of the specimen, and the resulting image is an image of the internal structure of the specimen.
A transmission electron microscope (TEM) works by passing a beam of electrons through a specimen to create an image of the internal structure of the specimen. A sample must be thin enough to allow electrons to pass through it, and it is typically stained with heavy metals to improve contrast.
The electrons interact with the atoms in the sample, and some electrons are scattered while others pass through to create an image on a screen or detector.
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Related Questions
describe the criteria used to classify covering and lining epithelia
Answers
Covering and lining epithelia are classified based on several criteria. The classification of covering and lining epithelia is based on the number of layers of cells present, the shape of the cells, and the presence or absence of surface modifications, as well as their location.
The following are some of the criteria used to classify covering and lining epithelia: Based on the number of cell layers present Simple epithelium- This type of epithelium is made up of a single layer of cells. It is further divided into different types based on the shape of the cells present. For example, a simple squamous epithelium is composed of a single layer of flattened cells, while a simple columnar epithelium is composed of a single layer of tall cells.
Stratified epithelium- This type of epithelium is made up of more than one layer of cells. The outermost layer of cells is referred to as the apical layer, and it is usually flat. It can be further classified based on the shape of the cells present, for example, stratified squamous epithelium or stratified columnar epithelium.Pseudostratified epithelium - This type of epithelium appears to have multiple layers of cells due to the position of the nuclei in the cells. It is also commonly referred to as false stratified epithelium because all cells come in contact with the basement membrane.
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Which unit represents speed?
A. newtons
B. miles per hour
C. joules
D. kilometers per second
Answers
Answer: B. miles per hour
Explanation:
A is wrong because it is a unit of physic.
C is wrong because it is unit for energy
D is wrong because second is not a unit for speed
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how are climate and weather different
Answers
\(climate \\ 1. \: \: climate \: is \: defined \: as \: the \: average \: conditions \: of \: atmosphere \: over \: a \: long \: period \: of \: time. \\ 2.the \: study \: of \: climate \: is \: called \: climatology. \\ 3. \: it \: is \: observed \: over \: a \: long \: period \: of \: time. \\ weather \\ 1. \: weather \: is \: defined \: as \: condition \: of \: the \: amosphere \: over \: a \: short \: period \: of \: time. \\ 2. \: the \: study \: of \: weather \: is \: called \: meterology. \\ 3. \: it \: is \: observed \: for \: short \: period \: of \: time. \\ hope \: it \: helps... \\ good \: luck \: on \: your \: assignment..\)
What causes temperature extremes in the dessert??
Answers
Answer: In the dessert the air is dry\lacks moisture.
Explanation:
Paige turns on an electric space heater in the center of her bedroom. The coils glow, and the room becomes warmer. How is heat reaching the corners of Paige's bedroom?
Answers
Think of it this way. Osmosis occurs when water flows to a different side given its a membrane or not. This is because it flows to a less dense area to reach equilibrium between the two sides. Heat is very similar. It will try to spread to places where there is not as much heat. Keeping the laws of heat travels up, the heat from the coils will reach the ends. We call this "Thermal Equilibrium"
a microbiologist obtained two pure isolated biological samples: one of a virus, and one of a viroid. the labels came off during a move from one lab to the next, however. the scientist felt she could distinguish between the two samples by analyzing for the presence of a single type of molecule. what type of molecule would she be looking for to differentiate between the two?
Answers
Protein would be the molecule to facilitate easy differentiation of viruses from viroids.
Viruses and viroids are an active class of compounds causing various infections and thus considered under infectious agents. Identification of the presence or absence of protein molecules in the pure sample of viruses and viroids is the best method to differentiate between them.
Viroids don't contain any protein and hence they also don't code for anything, however RNA viruses contain a protein coat over them which helps in easy identification.
Hence in such circumstances protein molecules and certain protein digesting enzymes could also be used to identify the virus samples from the viroids samples.
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Both prokaryotes and eukaryotes have small, free-floating organelles. The cell makes these
organelles from nucleic acids and amino acids found in food. Without these organelles, the cell
could not make proteins. What are these organelles called?
F chloroplasts
G mitochondria
Hribosomes
3 vesicles
1Abial
fub
Answers
Answer: ribosomes because they make proteins :)
Explanation:
what is the scientific name for a scorpion’s stinger?
Answers
Answer:
The telson. It lies at the tip of the scorpion's tail and features a bulb, where the scorpion's venom is both produced and stored.
Pseudoscience is Exact and Precise.
True
False
Answers
Answer:
False.
Explanation:
Pseudoscience are not exact and precise. In fact, they are mistaken practices/methods that are not part of the scientific method or based on the scientific method.
Answer:
False.
Explanation:
Pseudoscience are not exact and precise.
pyruvate starts with 3 carbon atoms but is converted to acetyl-coa, which has 2 carbon atoms. that missing carbon atom is lost in a molecule of
Answers
Pyruvate starts with three carbon atoms but then it is converted to acetyl CoA which has only two carbon atoms. The missing carbon atom combines with two oxygens and exits as carbon dioxide.
A glucose molecule containing 6 carbon atoms is split into two 3-carbon molecules which are called pyruvates. Pyruvate is required in order to produce acetyl CoA.
The 3-carbon pyruvate molecule which is made in glycolysis loses one carbon atom in order to produce a 2-carbon molecule which is called acetyl CoA. The carbon which gets removed takes up two oxygens from the pyruvate with it, and exits the body as carbon dioxide.
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there was an increased output of carbon dioxide as the rate of cellular respiration increased in order to support the extra activity. more carbonic acid was produced in a short period of time.
Answers
"There was an increased output of carbon dioxide as the rate of cellular respiration increased to support the extra activity. More carbonic acid was produced in a short period" is a true statement.
Why was there an increased output of carbon dioxide?
Cellular respiration is the metabolic process by which cells convert food molecules such as glucose into ATP energy that can be used to carry out various cellular functions. During cellular respiration, oxygen and glucose react, which produces energy in the form of ATP.
Carbon dioxide is produced as a by-product of cellular respiration. The greater the amount of cellular respiration, the greater the amount of carbon dioxide produced. As a result, an increased output of carbon dioxide is observed when the rate of cellular respiration increases.
What is carbonic acid?
Carbon dioxide is converted to carbonic acid (H2CO3) when it dissolves in water. When carbon dioxide is released by cells, it reacts with water in the blood to form carbonic acid. This reaction is catalyzed by an enzyme called carbonic anhydrase, which is found in red blood cells. In a short period, the increased output of carbon dioxide increases the concentration of carbonic acid in the blood.
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Immunity is comprised of both innate and acquired resistance.True or False
Answers
True. Innate and acquired resistance are both components of immunity. Innate immunity refers to a person's innate, non-specific defensive systems that give rapid.
but temporary, protection against a wide range of infections. This comprises physical and chemical barriers like skin, mucous membranes, and stomach acid, as well as cells and proteins like natural killer cells and complement proteins that can identify and respond to external invaders. Acquired immunity is the unique resistance that develops after being exposed to a specific disease, either naturally or by vaccination. Acquired immunity is the process by which the immune system is activated to develop particular antibodies and memory cells that can detect and respond promptly to recurrent infections with the same pathogen.
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Advantages of vegetative reproduction
Answers
Answer:
Vegetative reproduction is any form of asexual reproduction occurring in plants in which a new plant grows from a fragment or cutting of the parent plant or specialized reproductive structures, which are sometimes called vegetative propagation.
see the attached file for advantages
How are the alleles for sex-linked traits inherited?
They are passed from the Y chromosome in parents to the X chromosome in offspring.
They are passed from the X chromosome in parents to the XY chromosome in offspring.
They are passed from parents to offspring on the X and Y chromosomes.
They are passed from any chromosome in the parents to the X or Y chromosome in the offspring.
Answers
Answer:
Explanation:
The correct answer is: They are passed from the X chromosome in parents to the XY chromosome in offspring. Sex-linked traits are determined by genes located on the X chromosome, and males have one X chromosome and one Y chromosome, while females have two X chromosomes. Therefore, if a male inherits an allele for a sex-linked trait from his mother who is a carrier, he will always express that trait because he only has one X chromosome. However, if a female inherits the same allele from her mother, she may or may not express the trait depending on whether she also inherits a dominant or recessive allele from her father on her other X chromosome.
Sex-linked traits are controlled by genes on sex chromosomes (X and Y). They are passed from parents to offspring via these chromosomes, with males receiving one X-linked allele from the mother and no matching allele from the father.
Explanation:Sex-linked traits are controlled by genes located on sex chromosomes, which are the X and Y chromosomes. Alleles for these traits are not passed from the Y chromosome in parents to the X chromosome in offspring as the question suggests. Rather they are passed from parents to offspring on the X and Y chromosomes. For example, if a sex-linked trait is located on the X chromosome, a male offspring (XY) receives one variant of the gene from the mother (X chromosome) and does not receive a matching allele from the father (Y chromosome). Thus, sex-linked traits often exhibit different patterns of inheritance than non-sex linked traits.
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How Is the Nature of the Geologic Activity That Is Observed Near a Plate Boundary Related to the Type of Plate Interaction That Occurs at That Boundary?
Answers
Tides occur in ocean,why?
Answers
Answer:
¿Qué Causa las Mareas? Podemos decir de una manera sencilla que las fuerzas de atracción que tanto el sol como la luna ejercen sobre la tierra, permiten una deformación y consecuente movimiento de las masas de agua de mares y océanos; esto hace que los niveles de agua suban y se formen las mareas.NOTA: Aquí anexo la respuesta en ingles.What Causes the Tides? We can say in a simple way that the attractive forces that both the sun and the moon exert on the earth, allow a deformation and consequent movement of the water masses of the seas and oceans; This causes the water levels to rise and tides to form.
The first specimen has branching cells that are striated in appearance. each contains a nucleus. this is most likely ____________ muscle.
Answers
Answer:Cardiac
Explanation:Cardiac(Heart) muscles have irregular stripes.They are branched,have one nucleus per cell,fatigue resistant and are involuntary in action.
During photosynthesis in a eukaryotic cell, an electrochemical gradient is formed across the ___________.
Answers
During photosynthesis in a eukaryotic cell, an electrochemical gradient is formed across the Thylakoid space.
What is Thylakoid space ?
The thylakoid space is the area inside the thylakoid. A thylakoid is a membrane-bound disc found in plant chloroplasts. The thylakoid membrane contains enzymes required for photosynthesis's light-dependent reactions. During photosynthesis, an electrochemical gradient or proton motive force is created by the release (photolysis) or movement of protons from the stroma into the thylakoid lumen. The energy released during this movement is used by ATP synthase, CF o, and CF1 particles to form ATP mole.
Inside chloroplasts and cyanobacteria, thylakoids are membrane-bound compartments. They are the site of photosynthesis's light-dependent reactions. Thylakoids are made up of a thylakoid membrane that surrounds a thylakoid lumen. Chloroplast thylakoids frequently form grana, which are stacks of discs. Grana are linked together by intergranal/stromal thylakoids, which connect granum stacks as a single functional compartment. Chlorophyll pigments are found in packets called quantasomes in thylakoid membranes. Each quantasome has between 230 and 250 chlorophyll molecules.
The thylakoid membrane is the site of photosynthesis's light-dependent reactions, with photosynthetic pigments embedded directly in the membrane. It is an alternating pattern of dark and light bands 1 nanometre in width. The thylakoid lipid bilayer is similar to prokaryotic membranes and the inner chloroplast membrane.
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During photosynthesis in a eukaryotic cell, an electrochemical gradient is formed across the _Thylakoid membrane in the mitochondria_.
An ion that may flow across a membrane typically exhibits an electrochemical gradient, which is a gradient in electrochemical potential. The gradient is made up of two components: an electrical gradient and a chemical gradient, or a difference in charge across a membrane and solute concentration, respectively. What is the Thylakoid membrane?In chloroplasts and cyanobacteria, the light-dependent photosynthesis processes occur in thylakoids, which are membrane-bound structures that resemble sheets. Chlorophyll, which is present there and used to absorb light and utilize it for biological processes, is where it is found. Thylakoid is short for the pouch and has the -oid ending.Lamellae, another name for thylakoids, can also refer to the part of a thylakoid that joins grana.The water photolysis, electron transport chain, and ATP synthesis processes are all carried out in the thylakoid.The thylakoid membrane is the location of the light-dependent processes in photosynthesis because it contains photosynthetic pigments (such as chlorophyll). With a large surface area to volume ratio due to the stacked coil form of the grana, photosynthesis is made more efficient.To learn more about Thylakoid membrane, refer to:
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The evolution of the cuticle in plants was a key adaptation to terrestial living because
a. enhanced water loss.
b. enhanced absorption of nutrients from soil
c. allowed for an alternation of generation
d. helps plant to avoid drying up
Answers
The evolution of the cuticle in plants was a key adaptation to terrestrial living because it helps plants to avoid drying up.
Thus, the correct option is d. helps plant to avoid drying up.
In plants, the cuticle is a protective layer of waxy, hydrophobic substance produced by the epidermal cells. It is the layer of tissue that separates the aerial parts of the plant from the outside environment. It serves as a barrier to protect the plant from desiccation, UV radiation, and environmental stresses.The cuticle is thicker on leaves and shoots of plants that grow in dry environments, where the risk of water loss is greater.
The cuticle also helps to minimize water loss from the plant by limiting the amount of water that escapes from the plant's tissues by evaporation.Plants are considered the first organisms to live on land, and the evolution of the cuticle was a critical step in their transition from an aquatic to a terrestrial lifestyle. Without the cuticle, plants would have been unable to survive on land, as they would have dried out and died from desiccation.
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Hi, could someone tell me what should be in the blank space of my concept map about the cell membrane?
Answers
List the three components of traditional cell theory
Answers
Answer:
Cells are the basic unit of structure and function for all living things.
All organisms are made of cells.
All cells come from preexisting cells.
Explanation:
11. Which statement is a fundamental principle of the cell theory?A. All cells have a plasma membrane.B. Eukaryotic cells are larger than prokaryotic cells.C. Living organisms are composed of cells.
Answers
Cell theory
Even though all three options have correct information, the cell theory holds, as the main core of ideas, that all living organisms are composed of cells (option C).
(a)
Part A
Which statement best explains what caused some theropods to develop feathers?
A
A mutation in DNA affected the types of proteins produced by placodes.
B
A protein in the placodes caused a mutation in the gene that produces feathers.
C
A mutation in the placode gene caused placodes to produce different DNA.
D
A mutation in DNA caused the placodes that control genes to grow feathers.
Answers
Answer:
d
Explanation:
i have a 90 and get 100s in my biology exams going to 10th grade
how has water pollution been solved in the past
Answers
Answer:
Water pollution has been solved in the past through various methods such as implementing regulations and laws to limit pollution discharge into water bodies, developing and using advanced water treatment technologies, improving industrial and agricultural practices to reduce pollution, increasing public awareness and education about the importance of water conservation and pollution prevention, and having active involvement and collaboration among government agencies, industries, communities, and individuals to address and solve water pollution problems.
Explanation:
Water pollution is not a novel problem. It has been in existence for a very long time. However, even in the past, quite a few steps have been taken to address this problem. The top 3 ways have been mentioned below.
1. The most important step was taken by the people themselves! When the residents of various regions decided not to throw garbage in the water, that was a huge step.
2. Also, when the leaders of various nations came together to sign pact on the control of water pollution especially by imposing fines on industries, it was another leap towards cleaner water for the world.
3. Additionally, in underdeveloped countries, defecation in water bodies has been strongly discouraged, leading to the prevention of the pollution of the local water bodies.
Due to these steps, though the problem of water pollution has not been solved completely, it has gained significant recognition and support from volunteers across the globe.
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which choice below is the correct phylogenetic order from largest, most inclusive group to smallest, most exclusive group?
Answers
The correct phylogenetic order from largest, most inclusive group to smallest, most exclusive group is Protostomia > Ecdysozoa > Arthropoda > Insects. The correct answer is option b.
Protostomia > Ecdysozoa > Arthropoda > Insects
This order represents the hierarchical classification of these groups:
1) Protostomia: This is a major division of the animal kingdom, including organisms in which the mouth develops from the first opening in the embryo (blastopore). It encompasses a wide range of invertebrate phyla.
2) Ecdysozoa: This is one of the major evolutionary lineages within Protostomia, consisting of animals that undergo ecdysis, or molting. Ecdysozoa includes various phyla such as Arthropoda and Nematoda.
3) Arthropoda: This is a phylum within the subbranch Ecdysozoa, and it includes a diverse range of invertebrate animals, such as insects, crustaceans, arachnids, and more. Arthropods are characterized by their segmented bodies, jointed appendages, and exoskeletons.
4) Insects: This is a class within the phylum Arthropoda, specifically referring to a group of arthropods characterized by having three pairs of legs, one pair of antennae, and typically two pairs of wings (although some species have lost their wings).
Therefore, the correct phylogenetic order, from largest to smallest group, is Protostomia > Ecdysozoa > Arthropoda > Insects.
So, the correct answer is option b. Protostomia > Ecdysozoa > Arthopoda > Insects.
The complete question is -
Which choice blow is the correct phylogenetic order from largest, most inclusive group to smallest, most exclusive group?
a. Ecdysozoa > Arthropoda > Protostomia > Insects
b. Protostomia > Ecdysozoa > Arthopoda > Insects
c. Ecdysozoa > Protostomia > Arthopoda > Insects
d. Anthropoda > Protostomia > Insects > Ecyysozoa
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name the two ducts that merge to form the ejaculatory duct
Answers
The two ducts that merge to form the ejaculatory duct are the vas deferens and the seminal vesicle duct.
The vas deferens is a muscular tube that carries sperm from the testes to the urethra during ejaculation. The seminal vesicle duct, on the other hand, is a tube that connects the seminal vesicle gland to the vas deferens. The seminal vesicles produce a fluid that contains nutrients that help to nourish the sperm and enhance their motility. When the fluid from the seminal vesicles mixes with the sperm from the vas deferens, it forms semen, which is then transported through the ejaculatory duct and out of the body during ejaculation. The ejaculatory duct is therefore an important part of the male reproductive system and plays a key role in the transport of semen during sexual activity.
The ejaculatory duct is a short, muscular tube that connects the vas deferens with the urethra in males. During ejaculation, semen from the seminal vesicles and the vas deferens travels through the ejaculatory ducts and is expelled through the urethra.
The ejaculatory duct is formed by the union of the vas deferens and the seminal vesicle duct. The vas deferens is a long, muscular tube that carries sperm from the testes to the ejaculatory duct. The seminal vesicle is a gland that produces a fluid that helps nourish and transport sperm. The fluid from the seminal vesicles combines with sperm from the vas deferens to form semen, which is then ejaculated through the urethra during sexual activity.
Understanding the anatomy and physiology of the male reproductive system can be helpful for those who are interested in reproductive health and fertility, as well as for those who may be experiencing symptoms or issues related to this system. It is important to note that any concerns or questions about male reproductive health should be discussed with a healthcare provider.
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5. The burning of fossil fuels has increased the carbon dioxide content of the
atmosphere. What is a possible effect that the increased amount of carbon
dioxide is likely to have on our planet? (SC.6.E.7.9; SC.E.6.7.6)
a. A warmer climate
b. A cooler climate
c. Lower relative humidity
d. More ozone in the atmosphere
Answers
Answer:
A
Explanation:
As the ozone breaks down from greenhouse gases, a blanket is formed, heating up the climate (thus causing what we see as global warming).
Answer:
A
Explanation:
Carbon traps heat inside the earth
Question 24 of 35
Which two statements describe the Mesozoic era?
A. Most of Earth's history took place within this time.
B. Plants began to colonize land during this era.
✓ C. It is also known as the Age of Reptiles.
D. It lasted from about 250 million years ago to 70 million years ago.
Answers
Answer:
C
Explanation:
it was the time to f the dinosaurs and some of the dinosaurs were reptiles
How does farming up the food web reduce total amount of fish to
eat?
Answers
Farming up of food web reduces the amount of fish to eat due to the cultivation of higher tropic levels.
The presence of higher tropic levels leads to the consumption of the existing fish in the aquatic ecosystem. Leveling up of trophic levels requires a higher amount of organic matter which will lead to the depletion of fish living in the ecosystem. This process ultimately leads to a reduction in the total amount of fish to eat.
A food web is a combination of all the food chains in the ecosystem. Every organism has its place in the food web in the form of a trophic level. It starts with minimum energy and goes on to a higher tropic level with maximum energy.
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What is the difference between Carbonia and Insularia Peppered moths?
Answers
Carbonia and Insularia Peppered moths are two distinct forms or subspecies of the peppered moth (Biston betularia). The main difference between these forms lies in their geographic distribution and coloration.
Carbonia Peppered Moth: Carbonia is a form of peppered moth that is predominantly found in industrial areas where pollution and soot are prevalent.
These moths have dark or melanic coloration, which provides them with camouflage against the darkened tree trunks that were common in industrialized regions. The dark coloration of Carbonia moths helped them evade predators and increased their survival rates in polluted environments.
Insularia Peppered Moth: Insularia is another form of peppered moth that is primarily found in non-polluted or rural areas.
These moths have lighter or speckled coloration, which allows them to blend in with lichen-covered tree trunks that are common in unpolluted habitats.
The light coloration of Insularia moths provided them with camouflage against their natural background, reducing predation risk.
The difference in coloration between Carbonia and Insularia Peppered moths is an example of industrial melanism, where moth populations adapted to their changing environment due to human industrial activities.
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