Answer:
Viruses cannot be cultured in media like, bacteria, but in a living cells.
Explanation:
In order to identify a virus the following techniques are performed: PCR (single round) or nested/semi-nested PCR, real-time PCR, direct electronic microscopy, antigen capture, isolation (gold standard for viruses that can be cultured). Viruses cannot be cultured in media like, bacteria, but in a living cells.
Virus culture is based upon amplification of potentially infectious pathogens. Implies intracellular replication of viruses in the cytoplasm or in the nucleus. It is controlled by regulations (i.e. bio-safety level 2, 3 or 4). It is possible to identificate and further investigate for pathogenicity, and antiviral sensitivity.
The primary cell culture is developed directly from living tissue and contain several different kinds of cells. They are expensive as they cannot be subcultured (passaged) more than a few times and hence new tissue needs to be obtained from animals on a regular basis. One example of a primary cell line is chicken embryo fibroblasts.
Diploid cell lines can be subcultured about 100 times before they die. Much more useful in the laboratory and they can be stored indefinitely in liquid nitrogen. An example of this type is human embryonic fibroblasts.
Continuous cell lines have lost the normal constraints on cell growth such as contact inhibition and mortality. They can be subcultured indefinitely in vitro. They are Hep-2, HeLa (from human cancers) and VERO (from Green African monkey kidney).
In order to obtain suitable specimens it is necessary to identify specimens with suitable information and to evaluate the success percent of the process. Transport attributes are 4⁰C,-20⁰C, dry ice (-79⁰C). According to the protocol, in vitro/in vivo cell cultures are used. There are blood specimens, stool, throat swabs, naso-pharyngeal aspirat, urine, saliva and biopsy of certain areas.
Virus detection may be non specific (cytopathogenic effect – microscope) or specific (immunological detection – antigen detection, PCR etc.).
Viral load estimation I performed by titration and/or plaque assay.
The most common culture limitations are the absence of detection system for the agent, inappropriate culture systems, viruses that cannot be cultured, a negative viral culture results does not mean that the agent is absent (PCR).
Earth's magnetic field:
a. changes over time
b. remains unchanged
c. does not affect solar winds
d. is not affected by solar winds
changed
Explanation
As it's change it's polarity over time and it's called polarity reversal
Earth's magnetic field changes over time and is affected by, and affects, solar winds. It forms the magnetosphere, deflecting solar winds, but can also be influenced by them during solar storms.
Explanation:Earth's magnetic field is a fascinating topic that resides under the subject matter of Physics
To answer your question,
a.) Earth's magnetic field does indeed change over time .This is well-documented in geological records, with the magnetic poles known to swap places approximately every 200,000 to 300,000 years. Currently, we are significantly overdue for a swap. As per questions c.) and d.), the Earth's magnetic field is affected by solar winds, and it does affect them as well. Our magnetic field deflects a lot of the solar wind, causing it to follow the field lines and form the magnetosphere. But during solar storms, solar wind can influence magnetic field strength and shape.
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Suppose two trees were
damaged by two different
bark-eating animals. The
first animal ate a ring of
bark all the way around
the tree. The second
animal ate the same
amount of bark as the
first, but peeled it off as
a vertical strip. Did the
two animals do the same
amount of damage to the
trees? Explain your answer.
Answer:
The first animal will do more damage as compared to the second one.
This is because eating in a circular manner will destroy the phloems and hence no transportation of food from the leaves to other parts of the plant will be able to occur.
Eating in a vertical manner will destroy some of the outer phloems but the inner ones on which the animal doesn't feed will remain intact and will be able to carry out their function.
which of the following is an invertebrate?
A.sponge
B. bird
C. fish
D. dolphin
Answer:sponge
Explanation:a sponge doesn’t have a backbone
The central dogma of molecular biology is centered upon the process of _________, in which the information from DNA is transcribed and translated, resulting in amino acids being joined into polypeptides.
A) replication
B) translation
C) protein synthesis
D) carbohydrate synthesis
Answer:
protein synthesis
Explanation:
During the process of transcription DNA is used as a primer to produce a messenger RNA, catalyzed by the enzyme RNA polymerase. This process takes place in the nucleus of a cell.
The mRNA is transported to cytoplasm after processing or what we call splicing, to remove non-coding regions of RNA.
In the cytoplasm the process of translation takes place in the organelles called ribosomes where the tRNA with the anticodons reads the codons on the mRNA forming amino acids that are joined together to form polypeptides and proteins.
Answer:
The central dogma of molecular biology is centered upon the process of protein synthesis, in which the information from DNA is transcribed and translated, resulting in amino acids being joined into polypeptides.
Susana heats up a sample of red crystals. While the sample is being heated, a gas is released and a blue powder is left after the heating. Is the sample of red crystals an element or a compound? Explain your answer.
MY ANSWER:
The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.
SAMPLE ANSWER:
Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.
MAKE SURE TO INCLUDE AND ELABORATE ON THE FACT(S) THAT:
- Elements cannot be broken down into simpler substances.
[and]
- Compounds can be broken down into simpler substances.
I hope this helps! I wanted to post this for the help of future searchers.
Answer:
You can use either your answer or the sample answer you gave. You are so nice by the way!
Explanation:
THE FOLLOWING ARE TWO ANSWERS YOU CAN CHOOSE FROM
ANSWER 1:
The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.
ANSWER 2:
The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.
EITHER ONE YOU CHOOSE WILL BE CORRECT, JUST SAYING!
What impact would an artificial leaf have on environment?
The blood vessel that carries blood into the glomerulus is called the:
afferent arteriole
O vasa recta
peritubular capillary
O
efferent arteriole
arcuate artery
interlobular artery
Answer:
Afferent arteriole
Explanation:
A glomerulus is formed from the afferent blood vessels, a branch from the renal artery. The afferent arteriole collects blood from the glomerulus and extends to the renal tubule where it divides into capillaries that ramify the tubule. The afferent arteriole is wider than the efferent arteriole.
Match the following membrane component names with the correct letters in the cell membrane diagram below.
1.Phospholipids
2.Integral membrane protein
3.Carbohydrate chain
4.Cholesterol
Match the following membrane component functions with the correct letters in the cell membrane diagram below.
5. Helps identify a cell to macromolecules and other cells
6.Used to move large molecules through the membrane that cannot pass through by simple diffusion
7. Helps stabilize the lipid (phospholipid) bi-layer
8. Makes up most of the cell membrane
Answer:
The correct matching is given below.
Explanation:
1 phospholipid 8 makes up most of the cell membrane
2 integral membrane protein 6 used to move large molecules through the membrane that cannot pass through by simple diffusion.
3 Carbohydrate chain 5 helps identify a cell to macromolecules and other cells.
4 cholesterol 7 helps to staibilize the lipid(phospholipid ) bi-layer.
Which statement summarizes the main purpose of photosynthesis?
olide in the form of sugar
Explanation:
Complete question...
a) It converts gases to solids in the form of sugar.
b) It converts carbon to oxygen.
c) It converts light energy to chemical energy.
d) It converts energy to mass.
c) summarizes the main purpose of photosynthesis.
Carbon and oxygen from carbon dioxide and water end up as part of a glucose molecule while oxygen is released into the atmosphere.
Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released.
Further Explanation:
This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This begins in the thykaloids, where pigment molecules like chlorophyll reside.
The chloroplast is a membrane-bound organelle found in plants. It contains several invaginations of a plasma membrane called the thylakoid membrane. This contains chlorophyll pigments, in stacks called granum, while the internal spaces of the organelle are called the lumen. Liquid surrounds the granum, forming the stroma.
Particles of light, and water is used as a reducing agent.
6CO2 + 6H20 + (energy) → C6H12O6 + 6O2
Carbon dioxide + water + energy= glucose + oxygen
Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent; it reduces the molecule NADP to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.
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The relative concentration of water in a hypotonic solution is _____. low high stable equal
Answer:
The correct answer is high.
Explanation:
Hypotonic solution is a specific type of solution in which the concentration of water molecules is high than that of solute molecules present within that solution.
In a mitochondria chemical energy becomes available to cells through a process called
Answer:
Oxidative phosphorylation.
Explanation:
Mitochondria use oxygen, which is available within the cell to convert chemical energy from food in the cell to energy in the usable form to the host cell. This process is called oxidative phosphorylation. It occurs inside of the mitochondria. In the matrix of mitochondria, the production of NADH happens by the citric acid or Krebs cycle. After the creation of NADH, it is used by enzymes that are fixed in the mitochondrial inner membrane to produce ATP. Energy is stored in the ATP as a form of chemical bonds.
These bonds can be opened, and the energy can be delivered.
People build a dam to create a reservoir that supplies water a nearby city needs. Which of the following describes the effect this action will have on the Waterbury cycle for the region? A. Increased algae growth B. Reduction in the amount of groundwater downstream C. Prevention of aquatic dwelling organisms from moving past the reservoir will affect biodiversity D. Deprivation of nutrients-rich freshwater for plants and animals
Answer:
B) Reduction in the amount of groundwater downstream
Explanation:
Got it right on the quiz
The following describes the effect this action will have on the Waterbury cycle for the region is deprivation of nutrients-rich freshwater for plants and animals. Correct Option is 4.
Building a dam to create a reservoir can have a significant impact on the local water cycle, leading to the deprivation of nutrient-rich freshwater for plants and animals. The Waterbury cycle, also known as the water cycle or hydrological cycle, refers to the continuous movement of water on, above, and below the Earth's surface. Dams can disrupt this cycle by altering the flow of water in rivers and streams.
When a dam is built to create a reservoir, it can block the natural flow of water downstream. This can result in the accumulation of water behind the dam, forming the reservoir. As water is stored in the reservoir, it can lead to reduced downstream flow, which in turn affects the supply of nutrients, sediments, and organic matter that would normally flow downstream. These nutrients are essential for supporting aquatic plant and animal life downstream.
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what process of the carbon cycle is likely causing the increase in carbon dioxide levels shown in the graph above
Carbon dioxide levels have increased due to volcanic activity in the region. When a volcano erupts it releases carbon dioxide into the atmosphere.
What is Carbon cycle?The carbon cycle is defined as the biogeochemical cycle by which carbon is exchanged between the biosphere, the pedosphere, the geosphere, the hydrosphere, and the Earth's atmosphere, where carbon is the main component of organic compounds, as well as carbon deposits such as limestone. It is a major component of many minerals. ,
The carbon cycle is important to life on Earth where nature keeps carbon levels in balance, meaning that the amount of carbon naturally released from reservoirs is equal to the amount naturally absorbed by the reservoirs.
Thus, Carbon dioxide levels have increased due to volcanic activity in the region. When a volcano erupts it releases carbon dioxide into the atmosphere.
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Pre-Lab Work
1. Design an Experiment: What is the independent variable in this experiment (i.e., the
variable that you manipulate)?
Do you think White Acorn Barnacles, Chinook Salmon, and humans belong in the same
kingdom? In which kingdom or kingdoms do you think they belong? Explain your reasoning.
White acorn barnacles, Chinook salmon and humans belong to the same kingdom. They all belong to the kingdom Animalia.
Explanation:
The five kingdoms in the five kingdom classification of organisms are Monera, Protista, Fungi, Plantae and Animalia. White acorn barnacles, Chinook salmon and humans belong to the kingdom Animalia. Organisms in the kingdom Animalia have several characteristic features.
The animals belonging to the kingdom Animalia are multicellular, eukaryotic. The animals are heterotrophic. Their cells form tissues and tissues form organs. Organs form organ systems.
Most of the animals reproduce sexually and animal cells are diploid.
White Acorn Barnacles, Chinook Salmon, and humans belong in the same kingdom, the Kingdom Animalia, because they are multicellular, heterotrophic organisms with similar characteristics and structures.
Explanation:White Acorn Barnacles belong to the kingdom Animalia, Chinook Salmon also belong to the kingdom Animalia, and humans also belong to the kingdom Animalia. All three organisms are multicellular and heterotrophic, obtaining their food by consuming other organisms.
They also share similar characteristics and structures, such as a well-developed nervous system, specialized sensory organs, and complex behaviors. Therefore, it is accurate to say that White Acorn Barnacles, Chinook Salmon, and humans all belong in the same kingdom, which is the Kingdom Animalia.
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The observed redshifts of galaxies are evidence for the Big Bang Theory of the origin of the universe because they indicate that
Answer:
Are moving rapidly away in all directions
Explanation:
Edwin Hubble discovered in 1929 that the distance to far away galaxies were generally proportional to their red shifts astronomers viewing distant stars see evidence of this expansion evidence of red shift
I hope this helps Mate :) Sorry im late
In a plant cell, DNA can be found in?
A.mitchondria
B.the nucleus
C.chloroplasts
D.all of the above
Answer:
d) All of the above
Explanation:
Like all living organisms, plants use deoxyribonucleic acid (DNA) as their genetic material. The DNA in plant cells is found in the nucleus, the mitochondria and the chloroplasts. ... DNA is a coded set of instructions for making RNA.
In a plant cell, DNA can be found in the nucleus, mitochondria, and chloroplasts, so the answer is D) all of the above.
What is plant cell?A plant cell is a type of eukaryotic cell that is found in multicellular plants and is surrounded by a cell wall made of cellulose. Plant cells share many similarities with animal cells, such as having a nucleus, mitochondria, ribosomes, and other organelles that perform various cellular functions.
However, plant cells also have some unique features, such as chloroplasts, which are responsible for photosynthesis and give plants their green color, and a large central vacuole, which stores water and other substances. Plant cells also have plasmodesmata, small channels that allow for communication and transport of materials between adjacent plant cells. The unique features of plant cells enable them to carry out a wide range of functions essential for the growth and survival of plants.
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Substances diffuse naturally from an area of higher to lower
Explanation:
Substances diffuse naturally from an area of higher to lower concentration.
Via diffusion, small molecules can move from regions of high concentration to regions of low concentration until an equilibrium- a stable balance of solute: solvent, is reached. This occurs along the concentration gradient of the molecule, and usually involves small non-polar molecules in cells such as oxygen and carbon dioxide. In cellular transport, diffusion is also referred to as passive transport.
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In a pedigree, a vertical line and a bracket connect _____. siblings to each other parents to their children husbands to wives
Answer:
In a pedigree, a vertical line and a bracket connect parents to their children.
Explanation:
A pedigree can be described as a diagram which depicts the lineage of a person and shows his/her ancestors in a pattern. A pedigree is very helpful in understanding any genetic disorders which occur in a family. It helps the doctor conclude that whether the parents will have the probability of having a normal child or not.
In a Pedigree, a vertical line will be drawn to show the parents and their children. A horizontal line is drawn between the parents.
Answer:
parents to their children
Explanation:
gradpoint
What can be inferred about the role of a ribosome
______ are found in the stroma of chloroplasts small coins that provide energy. numerous mitochondrial membranes. stacks of thylakoids called grana. organelles called eukaryotes
Answer:
The correct answer is small coins that provide energy
Explanation:
Small coins structures are found in chloroplast which are termed as thylakoid.There are stacks like arrangement of thylakoids within the granum.
The Surface area of thylakoids is being increased by grana as a result more light is absorbed by the chloroplast.
The thylakoid of granum is the site of light reaction.
describe the structural organization of the human body
Answer:
Chemical, cellular. tissue, organ, organ system, and organism level.
Explanation:
Final answer:
The human body is organized into six levels of increasing complexity, from chemical components to the entire organism. These levels are chemical, cellular, tissue, organ, organ system, and organism. Eleven organ systems work together to maintain the body's functions and homeostasis.
Explanation:
Levels of Structural Organization of the Human Body
The human body is a complex and highly organized structure, from the smallest chemical building blocks to the entire organism. The structure of the human body can be described in terms of six levels of organization, which are:
Chemical level - This includes subatomic particles, atoms, and molecules necessary for life.Cellular level - Cells are the smallest units of living things and are the basic structural and functional units of the human body.Tissue level - Tissues are groups of similar cells that have a common function.Organ level - An organ is a structure composed of at least two different types of tissues that perform a specific function within the body.Organ system level - This level consists of related organs that work together to achieve a common purpose.Organism level - An organism is a living being that has cellular structure and that can independently perform all physiologic functions necessary for life.There are eleven organ systems in the human body, each of which has specific functions and includes different organs. For example, the circulatory system transports blood throughout the body and includes organs like the heart and blood vessels.
The basic body structure and organization can be thought of as a pyramid where cells and chemicals form the base, and organ systems make up the higher levels of organization. Understanding the human body's architecture, including anatomy and physiology, is essential for understanding how its parts function and maintain homeostasis, or the stable conditions necessary for survival.
what is the sequence of events in Mendel's experiment with the pea plant?
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Mendel's experiment with the pea plant involved identifying plants that bred true and selectively breeding purebred plants. He performed hybridizations to study the characteristics of the offspring.
Explanation:Mendel's experiment with the pea plant involved several stages. He first identified plants that bred true, meaning they produced offspring that were the same as the parents. These parent plants are referred to as the P generation. Mendel then selectively bred only the purebred plants that always bred true, called the P1 generation. He continued to experiment with true-breeding plants to avoid the appearance of unexpected traits in offspring. Mendel performed hybridizations, mating two true-breeding individuals with different traits, to study the characteristics of their offspring.
1 The effect of temperature on photosynthesis was investigated using the apparatus
shown in Figure 1.
OT WRITE IN THIS AREA
DO NOT WRITE IN THIS =
pondweed
in test tube
light
light meter
Figure 1
(a) Complete the equation for photosynthesis.
light
carbon dioxide + water –
water chlorophyll
glucose
SC
+ oxyger
(b) The pondweed was placed in a test tube of water at 10°C.
The number of bubbles of gas produced by the pondweed in three minutes was recorded.
This was repeated with water at different temperatures.
The light intensity was kept constant for each temperature.
(i) State why the light intensity absorbed by the pondweed is not the same as
the light intensity measured by the light meter.
(ii) Give two ways of improving this investigation.
The complete equation for photosynthesis is carbon dioxide + water producing glucose and oxygen, with light and chlorophyll vital to the process. Light intensity as measured may differ from what's absorbed by the pondweed due to multiple factors, and enhancements to the study can be made by controlling CO2 concentration and maintaining consistent temperature conditions.
(a) The complete equation for photosynthesis is:
carbon dioxide + water → glucose + oxygen, with light and chlorophyll as essential components for this process.
(b)(i) The light intensity absorbed by the pondweed is not the same as the light intensity measured by the light meter because of factors such as reflection, refraction, and absorption by the water, test tube, and other components of the apparatus, which can affect the actual intensity reaching the plant.
(b)(ii) Two ways of improving this investigation includes controlling for CO2 concentration, as CO2 availability can limit the rate of photosynthesis, and ensuring that the temperature remains consistent throughout the experiment, as temperature can affect the enzyme activity and gas solubility in the water, impacting photosynthesis.
Which of the following is true about prokaryotic and eukaryotic cells
Answer:
am NT sure
Explanation:
by I do think that a prokaryotic cell lacks a nucleus while a eukaryotic has a nucleus
Place the following words into the illustration below: Gametes, sporophyte, gametophyte, and zygote. Explain each step (arrow) in the cycle, and how the terms are related.
Answer:
1. gametophyte
2. gamete
3. zygote
4. sporophyte
Explanation:
The life cycle of ferns has two systems for reproduction. Each system is known as one generation. The life cycle of ferns is an alteration of these generations.
1. sporophyte generation (release spores - diploid )
2. gametophyte generation (release gametes - haploid)
In genetics, diploid cells receive two sets of the chromosome from male and female parents. A haploid cell has only one set of chromosomes.
Spores grow on the surface of mature fern leaves. The haploid spores give rise to gametophytes. The gametophyte produces gametes within multicellular structures by the process of mitosis. The fusion of male and female gametes to form a diploid zygote under fertilization. The development of the zygote gives rise to a diploid sporophyte. Within the sporophyte, spores will be formed by meiosis.
Here Is What I put...
Which event would most likely throw off dynamic equilibrium in an ecosystem? a lengthy drought, the birth of a litter of rabbits, a hunter killing a deer the death of several plants
A lengthy drought is the event most likely to disrupt dynamic equilibrium in an ecosystem due to the critical role of water in maintaining plant and animal life, and the cascading effects on food chains and survival of species.
Droughts can have severe impacts on ecosystems, as they can lead to a shortage of water resources, which are critical for the survival of plants and animals. For example, in the Four Corners area, a lengthy drought was associated with a vegetation increase followed by a rise in the deer mice population, which led to the outbreak of Hantavirus in humans. Additionally, droughts can disrupt food chains by causing the death of plants, which are the primary producers in most ecosystems. Changes in vegetation can also lead to mismatches in food availability for animals that rely on certain plants. The death of several plants, which might occur as a result of a drought, also affects ecosystems but typically on a smaller scale than a prolonged absence of rain.
Describe the biotic and abiotic features of the tropical rain forest
Describe the term Xylem
Answer:
the tissue in plants that conducts water and nutrients upwards from the root
Scientists show the composition of compounds by a kind of shorthand known as a chemical formula.
OT
OF
Answer:
True
Explanation: