Describe the two ways that viruses can reproduce in a host’s cell.
please help
Answers
Answer: There are two processes used by viruses to replicate: the lytic cycle and lysogenic cycle. Some viruses reproduce using both methods, while others only use the lytic cycle. In the lytic cycle, the virus attaches to the host cell and injects its DNA.
Explanation: It seems like that´s right
Related Questions
Which germ layer develops into bones, kidneys, bladder, ovaries or testes, blood, and muscles,including the heart?Question options:A) EctodermB) Blastula layerC) MesodermD) Endoderm
Answers
The correct answer is C) Mesoderm. This layer produces the mentioned organs, plus the vascular system (heart, vessels and arteries).
A cell uses active transport to move sodium ions out of the cell. Why does the cell use active transport instead of diffusion to move sodium ions out of the cell?.
Answers
Answer:
A cell uses active transport because active transport uses energy going from high to low (against the concentraion gradient) while diffusion (passive transport which doesn't use energy) goes from low to high.
Explanation:
The cell uses active transport to move sodium ions out of the cell instead of diffusion because they are moved against a concentration gradient.
WHAT IS ACTIVE TRANSPORT?Active transport is the type of transport in which substances are moved from a region of higher concentration to a region of lower concentration.
This means that substances are moved against a concentration gradient, hence, requires energy in form of ATP to take place.
The cell uses active transport to move sodium ions out of the cell instead of diffusion because they are moved against a concentration gradient.
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Could someone please help me with this True or False question I will give 30 points
Answers
1. False
The transfer of pollen grains from a plant's anther to a stigma of a flower of the same plant is called self pollination.
2. True
Although cucumber is considered as the vegetable but it is botanically a fruit
3. True
Asexual reproduction is the method of reproduction which require only one parent plant there is no exchange of genetic information and offspring are identical to parent .
4. True
The main function of flower is to carry out sexual reproduction in plant through the formation of male and female gametes.
5. True
In flowering plants , pollen grains germinate to from pollen tube that transport male gametes (sperm cells) to egg cell in embryo sac during sexual reproduction.
6. True
Dandelion seed are is tethered by a thin tube to around 100 bristles , which form the parachute like structure. When seeds break free from the flower head, these bundles of hairs catch the wind and carry their seed.
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how do salt marshes play a role in the trophic pyramid?
Answers
Answer: Salt marshes protect shorelines from erosion by buffering wave action and trapping sediments. They reduce flooding by slowing and absorbing rainwater and protect water quality by filtering runoff, and by metabolizing excess nutrients
Explanation:
Cells that have lots of gap junctions must have which of the following properties? Pick one answer
A. They must be able to resist large amounts of shearing forces.
B. They must be able to communicate with each other very rapidly.
C They must be able to form a barrier.
D. They must be able to recycle chemicals that they have released.
Answers
Answer:the correct answer is c because they must form a barrier to prevent the gaps from interfiering with bonding with atoms.
Explanation:
Answer:
Gap junctions are specialized channels that allow direct communication and transfer of small molecules and ions between adjacent cells option A is the correct answer
Explanation:
Gap junctions are composed of connexin proteins that form hexagonal channels, also known as connexons, in the cell membranes of adjacent cells. The connexons of two neighboring cells come together to form a gap junction, creating a direct pathway for communication between the two cells.
Research on gap junctions has led to the development of drugs that can modulate their function, which may have therapeutic applications for various diseases. Additionally, advances in imaging techniques have allowed for the visualization of gap junctions in live cells, providing insights into their structure and function.
In conclusion, gap junctions play a crucial role in intercellular communication, and their study has led to important insights into various physiological processes and disease mechanisms. Further research on gap junctions may lead to the development of new therapeutic approaches for various diseases.
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The autonomic nervous system works without our control. Which of the following does
cardiac muscle fall under?
involuntary or
voluntary
Answers
Answer: Involuntary.
The Autonomic nervous system is a subdivision of the Peripheral nervous system and it is in charge of the involuntary processes in the body such as blood pressure, respiration and the heart rate. As such, its effectors are under involuntary control.
The Autonomic nervous system controls the smooth and cardiac muscles in the body as well as the glands. This is where it earns its other name, the Visceral nervous system.
Explanation:
Hemophilia is inherited exactly like colorblindness. The dominant allele calls for normal clotting time of the blood
Answers
I apologize, but there seems to be an error in your statement. Hemophilia and colorblindness are not inherited in the same way.
Hemophilia is a recessive genetic disorder caused by mutations in the genes responsible for blood clotting, while colorblindness is a sex-linked genetic disorder caused by mutations in the genes responsible for color vision. In both cases, the presence of the recessive allele is required for the condition to manifest, but the specific genes and inheritance patterns differ.
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THIS IS THE PICTURE
Answers
Answer:
looks yummy
Explanation:
What is that btw hahaha
What is the great cardiac vein?
Answers
Cities A and B are located at the same latitude. City B is closer to a large body of
water. Why is the temperature of City B more moderated than the temperature of
City A?
City B receives more rainfall each year so the temperatures are more moderate.
City B is in the rain shadow of a mountain range.
The temperature at City B is moderated by the large body of water.
The temperature at City B is not impacted by the large body of water.
(EARTH SCIENCE)
Answers
Cities A and B are located at the same latitude. The temperature of City B is moderated by the large body of water while the temperature at City A is not. The difference in the temperatures of Cities A and B is due to the moderating effects of the large body of water near City B. A cities near a large body of water have moderate temperatures that don't fluctuate as much as cities further inland. The amount of rainfall in an area does not affect the moderating effect of a large body of water on the temperature.
The moderating effect of water is well known. Water can absorb and store a significant amount of heat energy, which allows it to absorb heat during the day and release it at night. As a result, cities near a large body of water are known to have moderate temperatures that don't fluctuate as much as cities further inland. The amount of rainfall in an area does not affect the moderating effect of a large body of water on the temperature. However, the amount of rainfall can affect the temperature in other ways.In Cities A and B are located at the same latitude. The temperature of City B is moderated by the large body of water, while the temperature at City A is not. This is because water can absorb and store a significant amount of heat energy, allowing it to absorb heat during the day and release it at night. As a result, cities near a large body of water have moderate temperatures that don't fluctuate as much as cities further inland. The amount of rainfall in an area does not affect the moderating effect of a large body of water on the temperature.
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Which statement is a valid inference based on the information in the diagram? a.) species A is the common ancestor of all life on Earth b.) species D is more closely related to species E than to species F c.) species B is the ancestor of species F d.) species C is the ancestor of species that exist at the present time
Answers
A valid inference base on the common ancestry diagram is species D is more closely related to species E than to species F. Option B
What is meant by common ancestry?A species can be said to be a common ancestor of all life on Earth when it is the most recent common ancestor of all living things.
This means that all living things share a common ancestor that is more recent than any other common ancestor.
The diagram shows that species D and E share a more recent common ancestor than species D and F. This means that species D and E are more closely related to each other than to species F.
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what is the overall chemical equation for photosynthesis
Answers
Answer:
6CO2 + 6H2O → C6H12O6 + 6O2
Explanation:
An organism that ferments glucose via the 2,3-butanediol pathway will be A. red in the Voges-Proskauer test. B. red in the methyl red test. D. red in the phenol red glucose.
Answers
The correct is A. An organism that ferments glucose via the 2,3-butanediol pathway will produce acetoin, which can be detected by the Voges-Proskauer test.
The methyl red test is used to detect the production of acidic products during glucose fermentation, while the phenol red glucose test is used to detect the production of acidic or basic products. The 2,3-butanediol pathway is an alternative pathway for glucose fermentation that is used by some bacteria, including some strains of E. coli, to produce 2,3-butanediol instead of acidic products. The Voges-Proskauer test is a biochemical test that can be used to detect the presence of acetoin, which is an intermediate in the 2,3-butanediol pathway.
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In response to an increasing blood glucose level, the human body will normally
Answers
A and b are linked genes. in a study of 100 offspring, 94 had parental genotypes for a and b, while 6 were recombinants. a and b are _____ map units apart.
Answers
In the study, out of 100 offspring, 94 had parental genotypes for genes A and B, while 6 were recombinants. This means that 6% of the offspring had a combination of genes that differed from the parental genotypes.
Since recombination occurs when genes are separated during the formation of sex cells, we can use the percentage of recombinants to estimate the distance between genes A and B.
One map unit, also known as one centimorgan (cM), represents a 1% chance of recombination occurring between two genes. Therefore, if 6% of the offspring are recombinants, it suggests that genes A and B are 6 map units apart on the genetic map.
In conclusion, based on the study of 100 offspring, where 94 had parental genotypes for genes A and B and 6 were recombinants, it can be estimated that genes A and B are approximately 6 map units apart.
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Propranolol is useful in the treatment of all of the following
EXCEPT
Angina Pectoris
Hypotension
Hypertension
Migraine
Myocardial Infarction
Answers
Propranolol is a medication that belongs to a class of drugs known as beta blockers. It works by blocking the effects of adrenaline on the beta receptors in the body, thereby reducing heart rate, blood pressure, and the workload on the heart. Propranolol is commonly used for the treatment of various cardiovascular conditions and migraines. However, it is not useful in the treatment of hypotension.
Hypotension refers to low blood pressure, and propranolol is not typically prescribed for this condition. In fact, propranolol's ability to lower blood pressure is one of its primary therapeutic effects. Therefore, using propranolol in patients with hypotension can further decrease blood pressure and potentially cause adverse effects, such as dizziness, fainting, or impaired circulation.
On the other hand, propranolol is effective in treating the following conditions:
1. Angina Pectoris: Propranolol helps manage angina, which is chest pain or discomfort caused by reduced blood flow to the heart muscles. By reducing heart rate and blood pressure, propranolol can decrease the workload on the heart and improve blood flow to the heart muscles, relieving angina symptoms.
2. Hypertension: Propranolol is commonly prescribed for hypertension, which is high blood pressure. By blocking beta receptors, propranolol reduces the force and rate of the heartbeat, leading to a decrease in blood pressure.
3. Migraine: Propranolol is used as a prophylactic (preventive) treatment for migraines. It helps reduce the frequency and severity of migraine attacks by stabilizing blood vessels in the brain and preventing excessive dilation, which can contribute to migraine symptoms.
4. Myocardial Infarction (Heart Attack): Propranolol is sometimes prescribed following a heart attack to reduce the risk of future cardiovascular events. By decreasing heart rate and blood pressure, it can help prevent strain on the heart and reduce the likelihood of recurrent heart attacks.
In summary, propranolol is useful in the treatment of angina pectoris, hypertension, migraine, and myocardial infarction, but it is not indicated for the treatment of hypotension. It is essential to consult a healthcare professional for appropriate diagnosis and treatment recommendations.
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Study the timeline. A timeline. 4. 5 billion years ago, Earth is formed. 4. 3 billion years ago, Earliest water. 4. 1 billion years ago, Single celled life. 3. 5 billion years ago, Earliest oxygen and photosynthesis. 2. 5 billion years ago, Complex single celled life. 1. 5 billion years ago, Multi cellular life. 500 million years ago, Land life. 300 million years ago, Dinosaurs. 200 million years ago, Mammals. 130 million years ago, Flowers. 5 million years ago, Humans. Based on fossil evidence, about how long ago did the first single-celled life form appear on Earth?
A: 130 million years ago
B: 1. 5 billion years ago
C: 2. 5 billion years ago
D: 4. 1 billion years ago
Answers
The correct answer is D: 4.1 billion years ago. This is supported by fossil evidence, which has found the remains of single-celled organisms that date back to this time period.
The timeline you provided shows that the first single-celled life form appeared on Earth 4.1 billion years ago. This is supported by fossil evidence, which has found the remains of single-celled organisms that date back to this time period.
The other options are incorrect. Option A, 130 million years ago, is the age of the dinosaurs. Option B, 1.5 billion years ago, is the age of multicellular life. Option C, 2.5 billion years ago, is the age of complex single-celled life.
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List three characteristics that distinguish cartilaginous fishes from living jawless fishes.
Answers
Cartilaginous fishes and living jawless fishes are two distinct groups of aquatic animals. Here are three characteristics that distinguish cartilaginous fishes from living jawless fishes:
1. Skeletal Structure: Cartilaginous fishes have a skeleton made of cartilage, a flexible and lightweight material. This contrasts with jawless fishes, which possess a more primitive, poorly mineralized skeleton.
2. Jaws and Teeth: Cartilaginous fishes, such as sharks and rays, have well-developed jaws with multiple rows of teeth that are continuously replaced throughout their lives. Living jawless fishes, like lampreys and hagfish, lack true jaws and instead have a circular, tooth-lined mouth used for attaching to and rasping at their prey.
3. Gill Structure: Cartilaginous fishes have five to seven pairs of gill slits that open directly to the outside, allowing for efficient respiration. Living jawless fishes, on the other hand, have a single gill opening on each side of the body, covered by a gill pouch.
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The rate limiting step in Angiotensin II production is how much ____ is released into the blood. a. aldosterone b. adrenaline c. renin d. cortisol
Answers
The rate limiting step in Angiotensin II production is the release of renin into the blood.
Renin is an enzyme produced and released by the kidneys in response to low blood pressure or low sodium levels. When renin is released, it acts on angiotensinogen, a protein produced in the liver, to produce angiotensin I. Angiotensin I is then converted to angiotensin II, a potent vasoconstrictor, by the action of angiotensin-converting enzyme (ACE). Angiotensin II is a potent vasoconstrictor and stimulates the release of aldosterone, which in turn regulates blood pressure and electrolyte balance. Thus, the amount of renin released into the blood is crucial in determining the level of Angiotensin II production.
The release of aldosterone, adrenaline, and cortisol can affect blood pressure and fluid balance but they are not the rate limiting step in Angiotensin II production.
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explain how euglenas structure maximises the amount of photosynthesis it can carry out
Answers
Explain how sex-linked, codominant and incomplete dominant traits are passed on to offspring.
Answers
Sex-linked traits are genes carried on the sex chromosomes, the X and the Y chromosome. Only males carry the Y chromosome, and therefore all genes on the Y chromosome are passed down to the son. Women carry two X chromosomes; therefore, sex-linked traits can be passed on from both the mother and the father.
Examples of sex-linked traits include red-green colour blindness and haemophilia.
In codominance, both alleles are expressed in the phenotype of heterozygous offspring. The human ABO blood group is an example of codominance.
There are three alleles for the ABO gene: IA, IB, and I (i is recessive to both IA and IB). If an individual is heterozygous for both the IA and IB alleles, they will express both A and B antigens on their red blood cells. If they are homozygous for either IA or IB, they will express only one antigen on their red blood cells.
Incomplete dominance occurs when neither allele is dominant nor recessive, but instead, the phenotype is a blend of both. An example of incomplete dominance is the snapdragon flower, which has a red flower and a white flower. When the red flower is crossed with the white flower, the resulting offspring have pink flowers, which is a blend of red and white. The genotype for pink flowers is Rr, where R represents the red allele, and r represents the white allele.
When two pink flowers are crossed, their offspring will have a ratio of 1:2:1 of red, pink, and white flowers.
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Can plants survive without osmosis?
Answers
Answer:
no.
Explanation:
Osmosis is the movement of solvent molecules across a semi-permeable membrane due to solute concentrations on either side of that membrane. In order for plants to remain healthy and thrive, osmosis is a necessary process.
Which of the following species is an R-selected species?a.Giant tortoisesb.Mosquitoesc.Elephantsd.Redwoods
Answers
Answer:
b. Mosquitoes
Explanation:
Mosquitoes are an R-selected species.
Please tell me, in your own words, what you know about the ideas of natural selection
and evolution.
Answers
Explanation:
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
In the theory of natural selection, organisms produce more offspring than are able to survive in their environment. Those that are better physically equipped to survive, grow to maturity, and reproduce. ... Biologists have since observed numerous examples of natural selection influencing evolution.
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What does a pollen grain consist of, at the time that it arrives on the female part of a flower or cone?
Answers
A pollen grain consists of a male reproductive cell and a protective outer coating called the exine, at the time that it arrives on the female part of a flower or cone.
A pollen grain consists of a protective outer layer called the exine, a cytoplasmic content containing the male reproductive cells, and a tube cell. When it arrives on the female part of a flower or cone, the pollen grain is ready for the fertilization process.
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The main difference between an ecosystem and a community is-
Answers
in an ecosystem, everything works together for everyone to be able to survive in a community everyone just lives together and it`s their choice whether or not they get along
Hope this helps ✨ - Six
how does episodic memory differ from semantic memory
Answers
Episodic memory and semantic memory are two types of long-term memory systems that differ in terms of the kind of information they store and how that information is accessed.
Episodic memory is the memory system that is responsible for storing personal experiences and events that occur in a specific time and place. Episodic memories are unique to the individual and are typically tied to emotions and sensory details. For example, remembering your first day of school or your last birthday party are examples of episodic memories. Semantic memory, on the other hand, is the memory system that stores general knowledge and information about the world, including facts, concepts, and ideas. It is not tied to specific personal experiences or emotions.
For example, knowing that the capital of France is Paris or that water is made up of hydrogen and oxygen are examples of semantic memories. In terms of how the two memory systems are accessed, episodic memory is usually accessed through retrieval cues that are tied to specific events, emotions, or sensory details. Semantic memory, on the other hand, is accessed through retrieval cues that are based on the meaning of the information being stored.
Overall, the main difference between episodic and semantic memory is that episodic memory is specific to personal experiences and is tied to emotions and sensory details, whereas semantic memory is general knowledge about the world that is not tied to specific experiences.
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In the carbon cycle, carbon dioxide and water are converted to glucose and oxygen by ________
Answers
Answer:
Photosynthesis
Explanation:
Gteen plants through this process to convert Carbon dioxide in the air and water to carbohydrate (glucose) and oxygen.
Carson's book caused:
Opublic outcry
O public humiliation
Opublic discontent
O public indifference
Answers
Answer:
a reversal in U.S. pesticide policy, a nationwide ban on DDT for agricultural uses, and an environmental movement that led to the creation of the U.S. Environmental Protection Agency.
a helium balloon rises because helium is ____ dense than air
Answers
Answer: A helium balloon rises because helium is less dense than air. A balloon filled with regular air, however, is denser than the surrounding air because the air inside it is under pressure.
Explanation: i looked it up for you so i could make sure it was right for you hope this helps!!!!!!!!!!!