Answer:
The correct answer is : They lack DNA/RNA so they must use the DNA of the host cell.
Explanation:
In general, Viruses are composed of two major parts, a genetic material - DNA or RNA (depending upon the type of virus) and a capsid protein coat that encloses and protects the genetic material.Without a genetic material no matter can be considered as living as there will be no multiplication and replication possible.Viruses need the host for its metabolism, replication and multiplication process.After infection, they hijack the cells protein-synthesising machinery, the ribosomes, and utilise the host cell's energy (ATP) for synthesising their own proteins encoded in their genetic material.They utilise the basic components of the host cell like amino acids, nucleotides and lipids for synthesising their own proteins, replicating and producing multiple copies of their genetic material and also producing their coat proteins and lipids.This way the infection-causing virus produces multiple virion particles that exit the infected host in search for new host and repeating this life-cycle.What are nucleic acids
Answer:
very large and complex organic molecules that contain the genetic code for that organism called RNA and DNA.
Explanation:
Which makes viral infections difficult to defend?
A.) the immune system must attack the body’s own cells
B.) viruses are attacked by a nonspecific immune response
C.) viruses live outside of cells
D.) macrophages work slowly
Answer:
Viral infections are difficult to defend as viruses are attacked by a nonspecific immune response.
Explanation:
Viral infections often tend to weaken the immune system of the body by turning it incapable of fighting the virus. Any external drug administered to fight the virus also leaves an impact on the beneficial cells causing them to cause side effects. The response of the immune system to the virus often fails to address the root of the virus and hence, the virus keeps growing stronger.what are two ways that crossing over contributes to genetic variation
Crossing over during meiosis creates recombinant chromatids with new combinations of genes and increases genetic diversity in gametes. This results in a high potential for genetic variation in the offspring produced through sexual reproduction.
Explanation:Crossing over is a critical mechanism in genetics that contributes to genetic variation in sexually reproducing organisms. This process occurs during prophase I of meiosis, where homologous chromosomes pair up and exchange genetic material, creating new combinations of genes. Here are two key ways that crossing over contributes to genetic variation:
Creation of recombinant chromatids: A single crossover event between homologous non-sister chromatids results in the reciprocal exchange of equivalent DNA segments. This exchange mixes the genetic material contributed by the maternal and paternal chromosomes, leading to new combinations of alleles on each chromatid.Increased diversity in gametes: Since crossing over can happen at various positions along the chromosomes, different gametes produced by meiosis will carry different combinations of maternal and paternal genes. This leads to a vast number of possible genetic combinations when gametes fuse during fertilization, contributing significantly to the genetic diversity of offspring.These mechanisms, along with independent assortment and random fertilization, ensure that each individual produced through sexual reproduction has a unique genetic makeup. For example, in humans, this can result in more than 64 trillion genetically unique potential combinations from just one couple.
Which of the following is not a type of endocytosis? phagocytosis pinocytosis receptor-mediated endocytosis constitutive secretion
Answer:
Which of the following is not a type of endocytosis?
constitutive secretion
Explanation:
There are only three types of endocytosis namely; phagocytosis, pinocytosis and receptor-mediated endocytosis
The breakdown of the cell membrane to get the food is called endocytosis. Amoeba is one of the species which perform endocytosis.
These are the steps involved in the endocytosis:-
Cover the preyMake a cup around the prey from the plasma membraneBreakdown the cell membrane and get the foodMost of the unicellular species do endocytosis for food, other cells also do this to remove the waste material from the cell.
According to the question, the correct option is constitutive secretion.
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suggest what physiological structural or behavioral features might be important to the striped shore crabs survival
The striped shore crabs' survival is dependent on physiological, structural, and behavioral features. The hard exoskeleton provides protection and prevents dehydration. The claws offer offense and defense capabilities. Behaviorally, being nocturnal, digging for protection or to lay eggs, and dietary adaptability contribute to their survival.
Explanation:The survival of the striped shore crab is dependent on both physiological structural and behavioral features. Physiologically, their exoskeleton provides necessary protection from predators and harsh environmental conditions. This hard, chitinous shell also helps prevent dehydration by reducing water loss. Structurally, their claws are instrumental in both offense and defense, and their compact body allows them to fit into small crevices for protection or to search for food.
With regards to behavior, the striped shore crab is mainly nocturnal, which lowers its exposure to daytime predators and high temperatures. They also have the behavior of digging into the sand to escape predators and to lay eggs, and can adapt their diet based on available food sources, demonstrating behavioral adaptability.
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Why is UVA light considered a mutagen?
It penetrates the skin and can cause mutations.
It can be prevented by wearing a protective vest.
It produces chemicals that can be inhaled.
It is found in synthetic dyes and cosmetics.
Answer:
It penetrates the skin and can cause mutations.
Explanation:
UV light is the most common source of radiation that affects DNA, but it is a weak radiation and it penetrates only the surface cells of your skin. However, UVA radiation is considered as a mutagen because it penetrates deep into the skin and can cause mutations.
Answer:
The first one, It penetrates the skin and can cause mutations
Explanation:
A Jewish couple is about to be married but they both worry about their family history. The man's uncle and the women's aunt died of Tay Sachs disease. Infer why the couple is hiring a genetic counselor analyze their families pedigree.
Answer:
A Jewish couple is about to be married but they both worry about their family history. The man's uncle and the women's aunt died of Tay Sachs disease. Infer why the couple is hiring a genetic counselor analyze their families pedigree.
Reasons are not far-fetched, both intended couple might carry a dominant gene for Tay Sachs disease or one of them has a dominant gene for such, it is pertinent a genetic counselor analyze their family pedegree in order to avoid having such disease or passing it to their offspring.
The chances of either of the intended couple to carry such dominant gene of the disease is imminent.
Explanation:
2. What is the difference between consumers and producers?
3. How are primary consumers, tertiary consumers and secondary consumers related? To earn full credit, you
must explain how they interact with each other.
4. Does the arrow point to the predator or the prey in a food web?
5. Read the descriptions and identify each organism by their trophic level
Shrew - a large wetland rodent that gets its energy from small insects.
Snake - a carnivorous wetland reptile that gets its energy from eating rodents and frogs
Marsh grass - a wetland grass that, like all plants, gets its energy from the sun. This plant provides energy for
insects in the wetland food web.
Frog -- An amphibian hat mainly gets its energy from hunting insects
Hawk - A top wetland predator which gets its energy from large wetland organisms such as snakes and shrews.
Grasshopper - a wetland insect that gets its energy from plants
Tertiary Consumers
and Higher
Secondary Consumers
2. Producers are autotrophs while the consumers are heterotrophs in nature.
3. The primary consumers are the herbivores who get food from the producers, primary consumers are eaten by secondary consumers, they are carnivores and eventually, secondary consumers obtain their nutrition from secondary consumers. Secondary consumers can eat both omnivores and carnivore as their energy source.
4. Arrow point is at the predator
prey⇒predator.
5 marsh grass (producer) is eaten by grasshopper (primary consumer), is consumed by shrew or frog (secondary consumer) are eaten by snake (tertiary consumer) is eventually consumed by hawk (higher consumer k/a the axial consumers).
It is to be noted that hawk can consume both snake and frog. Also, frog can prey upon shrew.
Explanation:
2.Producers are green plants and some bacteria which can manufacture their food from sunlight, they are the one who initiates the food chain.
The heterotrophs get their nutrition from these plants and chain continues to be axial consumers.
3. In this hierarchy the energy is being transferred in the upward direction. The biomass is also segregated in the same hierarchy. This chain is necessary to maintain the stability of the ecosystem.
.
What are the major factors that cause cell growth?
Answer:
External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.
ANSWER FIRST AND GET BRAINIEST
Now that you are more familiar with the benefits, risks, and impacts of biotechnology, it is time for you to take a stand! Your task is to choose one of the following types of biotechnology: genetic engineering, cloning, or artificial selection.
Choice:Artificial Selection
one benefit or one risk for the individual (based on whether you are for or against it)
one benefit or one risk for society (based on whether you are for or against it)
one benefit or one risk for the environment (based on whether you are for or against it)
Answer:Like all electronics, biotechnology offers the potential of excessive benefit but still potential risks. Biotechnology could help address many worldwide questions, in the way that temperature change, an mellowing organization, food safety, strength freedom and catching afflictions, to name just a few.
Answer:
Genetic Engineering was my choice because. Using genetic engineering can help produce greater quantities of food and more vitamins. This will help feed many more people in this growing population, us improving society and the individual. By changing the genetics of bacteria and plants, toxic waste can be reduced in the environment.
Explanation:
yw
Which big idea guiding Earth science relates most directly to the four spheres of Earth?
Earth's history
Earth in the solar system
the structure of the Earth system
constructive and destructive forces that shape Earth
Answer:C the structure of the Earth system
Explanation:
Answer:
the structure of the Earth system
Explanation:
4. Analyze what would happen to this ecosystem if one of the primary consumers was removed from the ecosystem?
What would happen if a new tertiary consumer such as a mountain lion came into the ecosystem? Describe how each
level would be affected if each of these changes occurred.
Answer:
Due to a primary consumer being taken out there will be more producers and less secondary consumers because of the new tertiary consumer eating them and the lack of food for the secondary.
During meiosis chromosomes will split into daughter cells randomly, making each gamete unique this is called what
Answer:
Independent assortment
Explanation:
Indepedent assortment was initially a law proposed by Mendel, which states that any given allele is inherited independently from any other given allele. This occurs because of meiosis, where different daughter cells (gametes) are formed with different combinations of chromsomes, each containing different patterns of alleles.
Final answer:
During meiosis, the process by which gametes are produced, homologous chromosomes are randomly distributed to daughter cells in a phenomenon known as independent assortment, leading to each gamete being genetically unique.
Explanation:
When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and chromosomes segregate independently of each other, a process known as independent assortment. This produces gametes, such as sperm and egg cells, that have unique combinations of chromosomes, contributing to genetic diversity. With humans having 23 pairs of chromosomes, this randomness in the assortment allows for over 8 million different combinations in each human gamete.
Specifically, during meiosis I, homologous chromosomes pair up and may exchange genetic material through crossover. This not only produces recombinant chromatids with new combinations of maternal and paternal genes but also ensures that each gamete receives a different mix of these genes. In meiosis II, akin to mitotic division, the sister chromatids separate into four unique haploid cells.
This process gives rise to the vast genetic variation seen in sexual reproduction. Upon fertilization, which is a sperm cell uniting with an egg cell, these unique combinations mix further, enhancing the possibility for variation.
BRAINLIEST
Part A: explain my process to his important to sexual reproduction.
Part B: identify processes 1 and 3. State one difference between the cells produced by process with 3.
Answer:
Part A: The process of sexual reproduction is important because by this process organisms with varied genetic characteristics can be formed. Crossing over and independent assortment allow individuals to be born which are not alike to another and their parents. As a result, genetic diversity is produced.
Part B:
The process 1 is meiosis. The process 3 is development by mitosis.
The reproductive organs form sperm and egg by the process of meiosis. During this process, the number of chromosomes is reduced so that the number of chromosomes of an individual can be maintained.
The zygote converts into an embryo in a process called germinal development. The zygote replicates by mitosis to form into an embryo.
Sexual reproduction involves meiosis and the fusion of gametes to produce genetically distinct organisms.
Explanation:Sexual reproduction involves the process of meiosis, which produces haploid cells called gametes. These gametes from two different organisms fuse together, forming a new diploid cell, a zygote. This fusion of gametes generates a genetically distinct organism.
Process 1: Meiosis - Meiosis is the process in which a diploid cell divides twice to produce four haploid cells. These haploid cells are the gametes. The main difference between the cells produced by meiosis and those produced by process 3 is that the cells produced by meiosis are genetically distinct from each other, while the cells produced by process 3 are genetically identical to each other.
Process 3: Fusion of Gametes - The fusion of gametes from two different organisms results in the formation of a new diploid cell, a zygote. This zygote develops into a new organism.
In a large new housing complex, many families do not practice water conservation. They take long showers over water their lawns, and wash their carefree
water treatment facility is old and was not designed to handle the increased amount of water, causing untreated sewage to be released into the environment. y
of pollution are demonstrated in this real world example?
Toxic
Sediment
Nutrient
Bacterial
Answer:
The correct option is D) bacterial
Explanation:
Waste water from domestic places when not disposed properly can lead to sewage in the lakes and rivers. This kind of sewage contains many bacteria and viruses which can cause dangerous diseases in humans and animals. E.coli, salmonella, cholera etc are some of the disease causing bacteria which can be originate from these places and cause a number of dreadful diseases. Hence, sewage from household should be properly disposed to avoid such circumstances to occur.
Answer:
Nutrient and Bacterial
Explanation:
Water treatment facilities can only treat a certain amount of. sewage each day. If too much water enters the facility excess untreated sewage will be released into the environment. Sewage containing human waste will cause both bacterial and nutrient pollution.
.
Heat moves from the land to the air through the process of
—
O conduction
O convection
O radiation
O refraction
—
—
Answer:
Heat moves from the land to the air through the process of "conduction".
Explanation:
When the two things come in contact with one another at different temperatures or basically when heat flows from the warmer to the colder region or phase until both reach at the same temperature is understood as "conduction". Conduction is a physical process which occur by collision of the microscopically colliding particles like molecules, atoms and electrons on the movement of heat through a substance.
While convection take place by the movement of heated objects and it isn't the process influencing air and water temperature difference. The examples of conduction are like a radiator, a heating pad, sand can conduct heat etc.
Where would you accept to see a plant that does not have a vascular system
Answer:
We can see non vascular system plants near the water sources.
Explanation:
Non vascular plants are the plants that lack the xylem and phloem system (i.e vascular system).The non vascular plants grow in the moist and damp places, so we would expect the non vascular plant to be present in the places where water source is near or presence of water is abundant.Without depending upon the roots they directly absorb water that is required to the main parts of plants.Near water sources or moist areas, why? Because nonvascular ( as the name suggests ) do not have vascular systems to transport water, so they must do so with more difficulty, henceforth, they must be near a water source to absorb any water to survive.
The joy that comes from achieving a certain goal or the anger that arises when a particular injustice has been made are __________. A. norms that regulate an inappropriate display of emotion B. norms that regulate an appropriate display of emotion C. emotional reactions generally consistent across cultures D. emotions that vary across cultures
Answer:
The correct option is C) emotional reactions generally consistent across cultures
Explanation:
There are certain emotional reactions which are similar for people of every culture whereas there are other emotional reactions which vary across different cultures.
The emotional reactions of being happy after achieving something and the emotional reaction of anger due to any injustice are general reactions which are shown by people all around the globe. Hence, option C is correct.
Other options, like option D, is not true because these emotional reactions are common and do not vary in people of different cultures.
Answer:
C: emotional reactions generally consistent across cultures
Explanation:
Edge 2020
A gene that shows its trait and prevents the expression of another trait is said to be:
Answer:
Dominant or heterozygous
Explanation:
Which of the following does a bacteriophage NOT have?
O
protein
O DNA
nucleus
none of the above
Bacteriophage doesn't have a nucleus.
Option C.
Explanation:Bacteriophage is a virus that is present in our surroundings. Its a phage virus that attacks bacteria and killing it. Bacteriophage has a tadpole like structure with a polygonal head and a neck and 6 tails. The polygonal head is formed of carbohydrates, along with the neck and tails. The head has inside it DNA that is its nucleic acid and genetic material. It's not enclosed in any nucleus. It has some proteins inside the head too.
The phage virus attaches itself with bacteria and drills the bacterial cell wall by the neck and pushes the genetic material inside as a mode of infection.
URGENT!!!
Some scientists propose that life on earth could have formed from primitive conditions, like those illustrated in the Urey-Miller experiment model shown above. However, more recent analysis indicates that the atmospheric components might be different than is shown above. If high rates of volcanic activity were responsible for the atmospheric conditions in the atmosphere, what modifications to the model might be necessary?
A) Water vapor should be present in higher concentrations, as volcanic activity would cause more water to evaporate.
B) Oxygen gas should be present in higher quantities, as photosynthesis would be occurring at a higher rate after volcanic activity.
C) Ozone would be present in higher quantities, as volcanic activity would increase the combination of free oxygen atoms into ozone.
D) Carbon dioxide, sulfur dioxide, and hydrogen sulfide should be present in higher concentrations than are depicted above, as they are emitted from volcanic eruptions.
Answer:
D) Carbon dioxide, sulfur dioxide, and hydrogen sulfide should be present in higher concentrations than are depicted above, as they are emitted from volcanic eruptions.
Explanation:
Volcanic eruptions can be extremely harmful and destructive for living beings, including plants, animals, and human health. However, they are also very dangerous for the environment.
These volcanic eruptions relase water vapor and toxic gases, such as carbon dioxide, sulfur dioxide, hydrogen sulfide, and carbon monoxide, into the atmosphere.
Therefore, if there were high rates of volcanic activity, responsible for atmospheric conditions, there would be higher levels of carbon dioxide, sulfur dioxide, and hydrogen sulfide.
Answer:
D) Carbon dioxide, sulfur dioxide, and hydrogen sulfide should be present in higher concentrations than are depicted above, as they are emitted from volcanic eruptions.
Explanation:
took the usatestprep quiz
What information is coded in the complex molecule?
What process is applied to identify mutations or errors in dna molecules
Answer:
DNA sequencing
Explanation:
Mutation can be described as a change which occurs in the DNA of an organism. It might be natural or it my be induced.
DNA sequencing can be described as a process in which the sequence or pattern of arrangement of nucleotides in the DNA. This pattern reading allows to see the differences which arise due to mutations. The normal sequence can be compared to the sequence in which error has occurred so that the error can be diagnosed.
Rock that is cooled and solidified above ground is called:
intrusive
extrusive
batholith
laccolith
Answer:
Rock that is cooled and solidified above ground is called as extrusive.
Explanation:
The extrusive rocks is an type of igneous Rock. They are produced through the crystallisation process of the molten silicate material that comes out to the earth's surface during the volcanic eruptions.The rocks present below that mantle is melted due to high temperature and the molten magma is pushed out due to high pressure. This magma on reaching the earth's surface cools down rapidly forming extrusive rocks. Rhyolite, andesite are some examples of extrusive rocks. Extrusive rocks contains very few grains that are larger in size
Build a simple fire extinguisher model that can work at home using recycled materials. The appliance must be able to extinguish the fire caused by gas and oil stoves... just describe how it works.
Answer:
just get a bucket of water and some detergent turn it very well for it to miss together, then pure it on the fire
A simple fire extinguisher model using household items involves a reaction between baking soda and vinegar to produce carbon dioxide, which can smother the flames of a small fire. It's important to note that this is only a model and should not replace a proper fire extinguisher. Fire safety measures including knowing how to use a fire extinguisher, having a fire blanket on hand, and first aid knowledge are crucial.
To build a simple fire extinguisher model using recycled materials, you can create a reaction that produces carbon dioxide (CO2), which is commonly used in fire extinguishers to douse flames without leaving a residue. Here's a basic idea of how it works:
Compare homologous and analogous structures
Answer:
In the field of comparative anatomy, homologous structures can be described as structures which are present in different organisms which are similar and show that the organisms had a common ancestor in the past. On the other hand, analogous structures can be described as structures which are similar in function but might not possess a common origin.
Example of the homologous structure is the forelimb of dogs, humans and birds. All these structures might not perform the same function but are structurally similar.
Example of analogous structure includes the wings of a bat and bird. Although similar in function, they do not show a common origin.
3. How much a machine changes its input force is its __
input output
mechanical advantage
none of the above
plz help
Mechanical advantage is the answer.
Option B.
Explanation:A machine is defined as the instrument which is used to perform some task easily, and with ease. A machine has the capability to give an output force in exchange of an input force. Now the ratio of the output force to input force is called as the mechanical advantage.
Mechanical advantage = Output force / input force.
For example, in case of a lever, there are three types - first class lever, second class lever, and third class lever. Mechanical advantage for a second class lever is always more than one, as we get more output force than input force. Similarly, the mechanical advantage for a third class lever is always less than 1, and mechanical advantage of first class lever can be both more or less or equal to one.
DNA is characterized by a single helix and ribose sugars
DNA, contrary to the question statement, has a double-helix structure containing two strands. Each strand is composed of nucleotides, which include a nitrogenous base, a deoxyribose sugar, and a phosphate group. Unlike DNA, RNA is single stranded and uses ribose sugars.
Explanation:Deoxyribonucleic acid, also known as DNA, is characterized by a double-helix structure. Contrary to the initial assumption in the question, DNA is not single-stranded but instead consists of two strands. Each strand is composed of nucleotides, which are comprised of a nitrogenous base, a five-carbon sugar called deoxyribose, and a phosphate group. In the DNA's structure, the sugar and phosphate form the backbone of the DNA, lying on the outside of the helix.
The nucleotides on each strand are bound together using covalent bonds, connecting the phosphate group of one nucleotide to the deoxyribose sugar of the next. The two complementary strands of DNA bind to each other at their respective nitrogenous bases with hydrogen bonds, forming base pairs. It's also important to note that the two strands run in opposite hyperlinked directions, with the 5' carbon end of one strand facing the 3' carbon end of its matching strand. This orientation is referred to as an antiparallel orientation.
On the other hand, ribonucleic acid, or RNA, is traditionally single-stranded and contains ribose sugars as opposed to deoxyribose. It serves multiple functions in the process of translating the genetic code in DNA into protein formation.
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Which factor will increase a population's size?
A.) High birthrate
B.) High death rate
C.) High emigration rate
D.) High predation rate
Answer:
a
Explanation:
b and d would kill pop
c has pop leaving
The factor that will increase a population's size is High birthrate. Therefore, option (A) is correct.
High birthrates can grow populations. Population expansion occurs when the birthrate surpasses the death rate. Birthrate is the number of births per population per time period.
High death rates reduce population size. A population shrinks when the mortality rate exceeds the birthrate. Emigrants leave the population to live elsewhere. This may reduce population size. Predator predation rate is high. Predation decreases prey species populations but does not directly increase them.
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Which best describes what type of fungus this is?
yeast, because its spores are produced in round cases at the top of the hyphae
yeast, because it is growing on a piece of food
mold, because it is growing on a piece of food (incorrect)
mold, because its spores are produced in round cases at the top of the hyphae
Answer:
D; mold, beacause its spores are produced in round cases at the top of the hyphae
Explanation:
Answer: D mold, beacause its spores are produced in round cases at the top of the hyphae
Explanation: