Hey there! Here are 7 differences between a cell and a virus:
A cell is a significant structural and functional unit of all living organisms. Instead, a virus is an infectious agent that is considered non-living. The cell is a living component, unlike a virus that is a parasite. Cells are present in a living form, on the other hand, the virus is present in both living and non-livingA virus doesn’t contain any kind of cytoplasm, cell wall, cell membrane, ribosome or mitochondrion, whereas a cell contains all of these (depending on what kind of cell it is). Many viruses do not even have a membrane, often formed of only a protein capsid containing the DNA or RNA based genome. Cells can exist independently like bacteria or can be as a part of larger organisms like our own cells in the body. Viruses on the other hand are non-living infectious particles that are dependant on a living host to reproduce.Cells reproduce through binary fission and mitosis or meiosis. When a virus replicates, it uses lytic fission to do itVirus particles are slightly smaller than a cell.Hope this helped. Explanations and examples are included within the points.
- profparis
When minute samples of DNA need to be genetically analyzed for identification purposes, which test can be effectively used to make more of the DNA
Answer:
When minute samples of DNA need to be genetically analyzed for identification purposes, which test can be effectively used? Fluorescent dye can be used as a label to trace antibody-antigen reactions in an ELISA assay
DNA is the genetic material that is the unit of inheritance. Small DNA samples can be increased in amount by the technique called PCR. Thus, option D is correct.
What is PCR?Polymerase chain reaction (PCR) is the technique used in biotechnology to quantitatively increase the amount of genetic material. It has been known to create billions and millions of copies of the sample.
The small DNA sample can be amplified by the process of PCR which involves the production of the DNA sample by the polymerase and primers to add the bases to the strand.
The DNA undergoes thermal cycling where the temperature of the system first increases in denaturation followed by a drop in temperature in annealing and lastly again a rise of temperature in extension.
Therefore, the PCR technique can increase the amount of small DNA samples.
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Your question is incomplete, but most probably your full question was, When minute samples of DNA need to be genetically analyzed for identification purposes, which test can be effectively used?
A. direct fluorescence antibody
B. Widal
C. Weil-Felix reaction
D. PCR
E. direct antigen reaction
Shelter, food and water are:
A:Limiting Factors.
B:Food Chains
C:Biotic Factors
D:Carrying Capacity
Answer:
A
Explanation:
These are all limited in an ecosystem, and if there isn't enough, it limits the growth of a population. All of these are abiotic factors, not biotic. Shelter has nothing to do with food chains.
Hope this helps!
What effect do rising sea levels have on coastal communities? (4 points)
Increased exporting
Loss of coastal land
Shortage of fish
Decreased storms
Answer:
3
Explanation:
because loss of costal land in sea area
Wats da answer bc I’m confused
Answer:
A. Cell
B. Organ
C. Tissue
Explanation:
cell: The smallest unit of life capable of independent reproduction. Generally contains nucleic acid, cytoplasm, a cell membrane, and many other proteins and structures.
organ: A structure made of different tissues that work together to perform physiological functions.
Tissues: A group of similar cells with the same origin that work together to perform the same function.
1. (c) explain why the ecosystem has not been able to recover quickly after the change:
Explanation:
The ecosystem was not able to recover quickly because seed banks were also destroyed during the fire that burnt almost everything.
Plants must have nitrates to help them grow. what must happen to nitrogen for it to be usable by plants?
Answer:
Nitrogen Fixation
Explanation:
Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation.
Plants must use nitrates in a form of nitrogen, which is needed to make proteins for healthy growth.
What impact on plants due to depletion of nitrates or nitrogen?Nitrate plays a very important role in our ecosystem such that due to presence of nitrogen plants grow fastly and produce fruits of bigger size flowers too.
Plants absorb nitrates from water through their roots without nitrates, the amount of chlorophyll in leaves reduces.
Nitrate is a common inorganic ion found in plants which is required for proper growth and development of the plant and growers include the percentage of nitrates in their nutrient requirement to starts plant growth. Plants acquire nitrate through root intake from the soil and water around them.
Hence due to decreasing percentage of nitrogen plants are getting yellowed it means it produces smaller fruit.
In modern era farmers add nitrogen containing fertilizers which produce large amount of grains, foods and fruits which is also diseases free.
Therefore,Plants must use nitrates in a form of nitrogen, which is needed to make proteins for healthy growth.
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how has climate change over geological time and how may it change in the future?
Answer:
Climate has generally changed from warm to cool globally mostly because of glaciers. Our climate can be changed in the future by the glaciers, also. Think about it this way, glaciers in the south pole melt, and the sea levels rise. Wind currents shift the glaciers and ice shelves, so they break. This will cause the world to overheat, and sea levels to rise. That's how our climate has and will change over time.
Match each term to its description.
Match Term Definition
Mixed farming A) Using the symbiotic relationship between growing crops and raising livestock
Crop rotation B) Growing different types of crops in the same area or in different seasons
Windbreaks C) Planting usually made up of one or more rows of trees or shrubs
Green crop D) Using crop waste or low-lying plants to cover the soil and supply nutrients
Agriculture is the cultivation of soil, through its own procedures, methods and techniques, which seek to produce food for human consumption.
Match each term to its description.Crop rotation A) Using the symbiotic relationship between growing crops and raising livestockMixed farming B) Growing different types of crops in the same area or in different seasonsWindbreaks C) Planting usually consisting of one or more rows of trees or shrubsGreen crop D) Using crop residues or low plants to cover soil and provide nutrientsWith this information, we can conclude that agriculture is the cultivation of soil, through its own procedures, methods and techniques, which seek to produce food for human consumption.
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36. What are the two smaller tubes that branch off of the trachea?
O epiglottis
O diaphragm
Obronchi
O tongue
Answer:
The answer is Bronchi
Explanation:
The Trachea is divided into two smaller tubes called the bronchi, one for each lung.
Which of the following is a main point of cell theory?*
a. All living cells are eukaryotes.
b. All cells come from other cells
c. The atom is the smallest unit of life.
d. Cells can spontaneously generate from organic molecules.
Answer:B
Explanation:
What best describes the association between the carbon cycle plants and animals
Answer:
Plants fix carbon and release oxygen, and animals release carbon and use oxygen.
Explanation:
identify structure one and describe its main function.
identify structure 3 and describe its main function.
30 POINTS
Answer:
number 3 is the central vacuole and its large, membrane-bound organelles found in plant cells that act as a storage space for water and other molecules in the cell
Explanation:
Answer:
3. Vacuole
Explanation:
Plant vacuole is a membrane (tonoplast) bound space which contains sap, water, excretory products and other materials (which are not useful for plants).
It occupies 90% of the volume of the plant cell. Tonoplast, in plants facilitates transport of ion into the vacuole (against the concentration gradient) which causes higher ionic concentration in vacuole than in the cytoplasm.Some other points:-
Amoeba have contractile vacuole for osmoregulation and excretory purposes. Some protists develop food vacuoles by engulfing food particles.Plants need oxygen to release the energy in the food that they make.
A. True
B. False
Explanation:
plants doesn't need oxygen to release the energy in the food that they make.
it's the same oxygen we breath.
the answer is false
Explain how the human immune system responds to a viral infection.
Which of the following statements is true about cellular respiration?
It converts energy into food.
it breaks down good to realse energy.
it turns carbon dioxide into water
it turns water into carbon dioxide
In the 1970s, the U.S. government passed laws to protect the water supply.
Which of the following best describes something these laws were intended to
do?
A. Reduce the amount of pollutants that enter wetlands
о B. Change the types of pollutants that enter wetlands
C. Increase the rate of groundwater flow to flush out pollutants
D. Increase the number of wetlands that can remove pollutants
Reduce the amount of pollutants that enter wetlands best describes something these laws were intended to do. Thus, the correct option is A.
What was the purpose of the Clean Water Act of 1970?The CWA made it illegal to dump any pollutant into navigable waters from a point source unless a permit was obtained:
The National Pollutant Discharge Elimination System (NPDES) permit program of the Environmental Protection Agency (EPA) regulates discharges.Discrete conveyances such as pipes or man-made ditches are examples of point sources.The Clean Water Act establishes the basic structure for regulating pollutant discharges into US waters as well as regulating surface water quality standards. The Federal Water Pollution Control Act, which served as the foundation for the CWA, was enacted in 1948, but it was significantly reorganized and expanded in 1972. With modifications in 1972, the Act's common name became "Clean Water Act."
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what is climate change and how does it affect us
Answer:
hotter temperatures, increases storms, increases drought
Answer:
As greenhouse gas they trap the sun’s heat. This leads to global warming as called climate change if effects us by getting the earth hotter and hotter slowly getting more and more every year making ice that was there before for years now is gone
Hope This Helped
Why is our year approximately 365 days long?
Choose 1 answer:
This is how long it takes Earth to travel once around the sun.
This is how long it takes the sun to travel once around Barth.
This is how long it takes the universe to travel once around Earth.
Answer:
this is how long the universe to travel around the earth once
1. A hypothesis is a guess - like flipping a coin.
A. False
B. True
2. Identify all the constants needed for this experiment.
A 10 mL of fertilizer
B how often plans are watered
C amount of light
D height of plants
E 200 mL of water
3. What is the variable called that you are changing?
A. Control
B. Dependent
C. Independent
4. In a controlled experiment,
A
a control group is compared to an experimental group.
B
a variable is not needed
C
all factors should be the same.
D
there are only 2 variables.
Answer:
1. false as a hypothesis is an educated guess so
2. share the experiment please
3.independent
4.A
What is global wind and how do winds help humans travel?
Global winds are winds that appear in belts that go all around the world. Like local winds, global winds are driven by unequal heating of the atmosphere. Since global winds blow west to east, it helps humans travel west to east.
How global winds influence climate?
Global wind belts and calm regions have an effect on, is that the berg winds blow from the east and die out as they are available close to the equator.
The westerlies blow from the west and move storms across u. s. The easterlies blow from the east and they cause stormy weather to occur once cold air forms this belt meets heat air of the westerlies.
Thus, this could be the answer.
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In the harmful dysfunction definition of psychological disorders, dysfunction involves ________.
Answer:
the inability of an psychological mechanism to perform its function
Explanation:
Which chromosomal defect is caused when part of a chromosome breaks off and reattaches backward on the same chromosome?
inversion
translocation
deletion
insertion
Answer: (A) inversion
Explanation:
EDGE 2023
How do humoral and cell mediated immunity help each other
Please help me thanks
Humoral immunity protects the body against extracellular pathogens and Cell mediated immunity protects the body from intracellular pathogens .
Humoral immunity: It is the process adaptive immunity manifested by the production of antibodies by B lymphocytes. It develops the bone marrow. B cells may be trigged to proliferate into plasma cells.
Cell mediated immunity: Cell mediated immunity is an immune response that does not involve antibodies but rather involves the activation of macrophages and NK cells.
Humoral immunity and cell mediated immunity works together with assistance from helper T cells, B cells.
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4. Which of the following is a parasite?
(a) Mushroom
(b) Fungi
(c) stem
(c) Cuscuta
(d) haustoria
(d) Rhizobium
Answer:
C: Cuscuta is a parasite .
Explanation:
Mushrooms are a part of the fungi domain meaning that it is a decomposer. I'm not too sure whether it means stem body cells or a stem in a plant. Either way both are not parasites. Cuscuta is a plant that does not have chlorophyll (they can't carry out photosynthesis) and since this plant cannot make its own food, it feeds off a host plant that can make food. An organism that needs a host to survive is called a parasite. Haustoria is a part of some parasites however it itself is not one. And finally Rhizobium is a bacteria that converts Nitrogen into ammonia which helps plants.
Sorry about the bad english. Hopefully this kinda helps
what process adds carbon dioxide to the air
Answer:
respiration
Explanation:
Learning Task No. 3: Performance Task Sanitizer/Disinfectant 1. Chlorine 2. lodine 3. Vinegar Advantages 4TH QUARTER LEAP Disadvantages
Answer:
iodine
Explanation:
it has the maximum potential for the Chemical to leak down.
How does sea level change when Earth's global temperature is lower?
A. Glaciers grow bigger, causing sea level to fall.
B. Glaciers grow smaller, causing sea level to fall.
C. Glaciers grow smaller, causing sea level to rise.
D. Glaciers grow bigger, causing sea level to rise.
Glaciers grow smaller, causing sea level to rise when Earth's global temperature is lower. Thus, the correct option is C.
Sea level lowers during cold climate periods, known as glacial epochs or ice ages, due to a shift in the global hydrologic cycle, in which water evaporates from the oceans and is stored on the continents as massive ice sheets, extended ice caps, ice fields, and mountain glaciers. At the last glacial maximum, some 20,000 years ago, global sea level was about 125 meters lower than it is today.
What is interglacial epochs?Because the melting North American, Eurasian, South American, Greenland, and Antarctic ice sheets returned their stored water to the world's oceans as the climate warmed, sea level rose. Sea level is at its highest during the warmest eras, known as interglacial epochs.
We are currently living in the most recent interglacial, which began around 10,000 years ago and is referred to by geologists as the Holocene Epoch. Sea levels were about 3 to 20 meters higher than they are now during several previous interglacials.
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Which is the genotype of the sweet pea? heterozygous dominant heterozygous recessive homozygous dominant homozygous recessive
Heterozygous dominant is the genotype of the sweet pea. thus option A is correct.
What do you mean by genotype?The genetic foundation of a certain trait is called an organism's genotype. While an organism's phenotype refers to its outward appearance.
When an organism has two copies of the same dominant allele, it is said to be homozygous dominant.
The identical recessive allele is present in two copies in a homozygous recessive organism.
An organism is said to be heterozygous if it possesses both the dominant and recessive alleles of a gene.
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Which is the genotype of the sweet pea ?
A. heterozygous dominant
B. heterozygous recessive
C. homozygous dominant
D. homozygous recessive
Answer: C. Homozygous dominant
I just took the test
when dust and ash parties from volcanic eruption
Answer:
This is called a volcanic winter.
Explanation:
The reason why it is called a volcanic winter, is because in winter, it is colder than the other seasons, but, here's the difference. A volcanic winter is because sunlight is blocked, and a regular winter is when the earth is tilted in a place where the area is not being shined on by the sun.
THANKS FOR LETTING ME HELP!!!
which statement concerning the evolution of species A,B,C,D and E is supported by the diagram below
1) Species B and C can be found in today's
environments.
2)
Species A and D evolved from E.
3) Species A and C can still interbreed.
4)
Species A, B, and E all evolved from a common
ancestor and all are successful today.