2. Which characteristics of living things do viruses have? Which do they lack?
3. Could viruses have been the first form of life on earth? Why or why not?
4. List three ways the body can protect itself against viral or bacterial infections.
5. Why do the symptoms of certain viral infections occur after having disappeared for a period of time?
Answers
Because they are not formed of cells, viruses cannot be in a steady state, develop, and generate their own energy.
What distinguishes viruses from living things?Viruses not able to produce ATP, which is how they differ from biological things. As was already mentioned, viruses lack the tools needed for translation. They lack ribosomes and are unable to produce proteins on their own from messenger RNA molecules.
What part of a virus is missing from a cell?viruses lack ribosomes, mitochondria, and any other organelles, their cellular hosts are their only source of protein synthesis and energy. They can only produce inside cells of the infected host.
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Related Questions
The DNA sequence that acts as a switch for turning the lac operon off or on is the __________. A) repressor B) promoter C) operator D) regulatory gene
Answers
The main answer to your question is C) operator.
The operator is a segment of DNA located between the promoter and the structural genes of the lac operon.
The operator serves as a switch that can turn the operon on or off by binding to a repressor protein.
When the repressor protein is bound to the operator, it blocks RNA polymerase from transcribing the structural genes, effectively turning off the operon.
When the repressor protein is not bound to the operator, RNA polymerase can bind to the promoter and transcribe the structural genes, turning on the operon.
In summary, the operator is a key regulatory element that controls the expression of genes in the lac operon.
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please help i’ll give brainliest
Answers
Answer:
An animal that eats dead animals or plants
Explanation:
A scavenger is literally defined as an animal that feeds on dead plant material or carrion which means decaying flesh of dead animals ( humans included)
To be functional, a linear chromosome most often contains at least:
Answers
A linear chromosome must typically have at least A. two telomeres, two centromeres, and a significant number of replication origins in order to be functional.
A chromosome with terminal ends and a linear shape is referred to as a linear chromosome. The DNA is organized into several linear chromosomes in the majority of eukaryotic cells. On the other hand, most prokaryotic cells have just one circular chromosome on average. Its close cousins Streptomyces coelicolor and Streptomyces avermitilis, as well as Rhodococcus sp., all contain linear chromosomes.
Since the eukaryotic type of many cells often has all linear chromosomes which are capped among telomeres, with the eukaryotic DNA replication, cell division can be mitosis and meiosis and are a bit more difficult. In eukaryotic cells, DNA replication can only occur before to mitosis and cannot occur during cell division.
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arthur is a participant in a research study aimed at understanding how the brain responds to prolonged periods of isolation. after spending several hours in a room alone, arthur undergoes a(n) procedure; a method that measures neuron electrical activity using electrodes placed on the scalp.
Answers
Electroencephalogram is a method that measures neuron electrical activity using electrodes placed on the scalp.
Electroencephalography :The technique of electroencephalography is used to capture an electrogram of the brain's spontaneous electrical activity. It has been demonstrated that the biosignals picked up by EEG are postsynaptic potentials of pyramidal neurons in the neocortex and allocortex.
What is the purpose of an electroencephalogram?An EEG is primarily used to identify and research epilepsy, a disorder that results in recurrent seizures. An EEG will assist your doctor in determining the type of epilepsy you have, any potential causes of your seizures, and the best course of treatment for you.
How are EEG tests conducted?A technician attaches tiny metal disks called electrodes to your scalp during an EEG. The electrodes are connected to a device that provides data about your brain activity to your doctor.
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The complete question is :
arthur is a participant in a research study aimed at understanding how the brain responds to prolonged periods of isolation. after spending several hours in a room alone, arthur undergoes a(n) procedure; a method that measures neuron electrical activity using electrodes placed on the scalp.
a. skin conductance response
b. electroencephalogram
c. magnetoencephalography
d. electrical stimulation
Genetic information is encoded in a linear sequences of nucleotides,
which are structures that contain
A) a sugar group, a phosphate group, and a nitrogen base
B)an amine group, a functional R group, and a carboxyl group
C)short chains of CHO
D)long chains of CHO
Answers
Answer:
B)an amine group, a functional R group, and a carboxyl group
Explanation:
bacteria found on the skin that are not considered part of the normal microbiota are called:
Answers
Transient bacteria are found on the skin that are not considered part of the normal microbiota.
What a bacteria do?Some of them provide the body with essential vitamins, aid in digestion of food, and eliminate disease-causing cells. Additionally, bacteria are employed to create nutritious foods such yogurt and cheese. But contagious microorganisms can give you an illness. Within your body, they multiply rapidly.
How do bacteria eat?Instead of beaks, bacteria utilize proteins called enzymes to help them convert different nutrients into form that may be used for energy. Additionally, as a consequence of the degradation and usage of minerals for energy in the this process, bacteria produce a range of byproducts.
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Choose all the answers that apply.
Epithelial tissue_____
A.lines the inside of hollow organs
B.covers the outside of organs
C.protects the outside of organisms
D.is found in the digestive tract
E.is voluntary
Answers
Epithelial tissue lines the inside of hollow organs. Therefore, option A is correct.
The body contains a variety of epithelial tissues. They are the primary tissue in glands and make up the covering on all of the body's surfaces, the lining of body cavities, and hollow organs. Protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception are just a few of the many tasks they carry out.
In epithelial tissue, the intercellular matrix is sparse, and the cells are closely packed together. The cells have one surface that is free and not in contact with other cells since the tissues create covers and linings. Contrary to the free surface, a non-cellular basement membrane holds the cells to the underlying connective tissue. The epithelium and connective tissue cells produce a mixture of carbohydrates and proteins to form this membrane.
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Which is an agent that causes a mutation in dna or chromosomes? nondisjunction karyotype mutagen phenotype
Answers
A mutagen refers to any agent found in an organism's environment capable of producing genetic mutations in DNA.
A mutagen is a physical or chemical agent that, in genetics, irreversibly alters genetic material, typically DNA, in an organism. This increases the frequency of mutations over the background level of natural mutations.
Such mutagens may be carcinogenic since numerous mutations in animals can result in cancer, albeit not necessarily all of them are. While some compounds turn become mutagenic substances through biological mechanisms, each and every mutagens have distinctive mutational signatures in them.
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A frameshift mutation usually produces a(n)
A. change in the structure of ribosomal RNA.
B. more drastic change than a point mutation.
C. change in the appearance of a chromosome.
D. extra copy of all or part of a chromosome.
Answers
A frameshift mutation usually produces a(n) more drastic change than a point mutation.
What is the most drastic mutation?Death is usually caused by frameshift mutations, although point mutations rarely are. As with point mutations, even if only one nitrogen base is altered, in this case the single base is either entirely deleted or an additional one is added in the center of the DNA sequence.
Do most point mutations in organisms have a significant impact?Certain mutations are advantageous, even if the majority of mutations have no impact on the organisms in which they arise. Even damaging mutations seldom result in significant modifications to organisms.
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Which biome is an animal with thick fur best suited for? A. tundra B. rain forest C. grassland D. desert E. aquatic
Answers
Answer: A. tundra
Explanation:
An animal has thick fur to be able to withstand the environment around them. if an animal has thick fur they most likely live in climates that get cold like a tundra. the thick fur helps to keep them warm.
hope that helps(:
Answer:
A tundra
:))))
Put the following structures in the correct order from SMALLEST to LARGEST: nucleic acid, chromosome, nitrogen base, nucleus, gene, cell, DNA, nucleotide
Answers
You can also check online because I’m not really sure
DNA, nucleic acid, nitrogen base, nucleotides, gene, chromosome, nucleus, cell is the following structures in the correct order from SMALLEST to LARGEST.
What is DNA?
The term "DNA" is deoxyribonucleic acid. DNA is often referred to as deoxyribonucleic acid due to its structure. Adenine, Cytosine, Guanine, and Thymine make up the phosphate backbone of the nucleic acid, while Pentose Sugar makes up the deoxyribose part.
Deoxyribose lacks the -OH group on position 2 of the sugar ring. Helixes are the two strands that make up DNA. Deoxyribose, which literally translates to "without oxygen," is a sugar ring that does not contain the OH-group at position 2.
Thus, DNA, nucleic acid, nitrogen base, nucleotides, gene, chromosome, nucleus, cell is the following structures in the correct order from SMALLEST to LARGEST.
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what’s the code for UCU AAA CCU GGG UAA
Answers
Which of the following statements is a correct description of a microtubule? a. A microtubule is composed of only alpha-tubulin b. A microtubule is an polar structure c. During polymerization of a microtubule, GTP on both, alpha and beta-tubulin is hydrolyzed d. A microtubule is smaller than an intermediate filament e. A microtubule is made up of 13 protofilaments
Answers
Answer: B) A microtubule is an polar structure
Explanation:
I could be wrong
What is the probability of getting the same numbers on 3 dice when they are thrown simultaneously?
Answers
Answer:
So, assuming the dice are 'fair' (that each of the six numbers has a probability of 1/6 of showing up on each of the dice), there is a probability of 1/36 that all three dice will show the same number.
Explanation:
the are repeating units within muscle fibers that act as the functional units of muscle contraction.
Answers
The fundamental contractile component of a myocyte is called a sarcomere (muscle fibre). The two primary protein filaments that make up a sarcomere—thin actin and thick myosin filaments—are the functional elements in charge of causing muscle contraction.
What is the name of the functional unit found within muscle cells?A sarcomere is the name for a skeletal muscle's functional unit. Myofibrils, which are comprised of actin and myosin filaments, make up the fibres of skeletal muscles. Sarcomeres, which are collections of these filaments, are formed.
The length of the myofibrils and subsequent myofibers can reach several centimetres. The muscle is made up of solitary multinucleated cells called muscle fibres. Sarcomeres, which are repeating units, make up myofibrils. Muscle contractions are mediated by these sarcomeres.
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Define Metabolism.. !
Answers
Answer:
Metabolisms are the chemical processes that occur within a living organism in order to maintain life
Explanation:
A scientist examines the body fossil and trace fossils left by an ancient vertebrate species in Red Rock
Canyon. What would the scientist leam about this species from each type of fossil? Give specific examples in your
answer.
Answers
Answer:
6969696969696996969696969696969
You are viewing a bacterial cell with an electron microscope and you see that it has a septum. What does this tell you about that cell
Answers
The presence of a septum indicates that the bacterial cell is undergoing cell division.
When viewing a bacterial cell with an electron microscope and observing a septum, it signifies that the cell is in the process of dividing or undergoing binary fission. Binary fission is a common mode of reproduction in bacteria, where a single cell divides into two identical daughter cells. The septum is a structure that forms across the middle of the cell, dividing it into two compartments. This division allows for the separation of cellular components and genetic material between the two emerging daughter cells.
During cell division, the bacterial cell first replicates its DNA and increases its cellular components. As the cell grows in size, a septum starts to form at the midpoint of the cell. The septum consists of a double layer of the cell membrane and peptidoglycan, a structural component of the bacterial cell wall. It forms inward from the cell periphery until it completely separates the two daughter cells. Once the septum is fully formed, the two daughter cells pinch off from each other, resulting in two independent cells.
The presence of a septum in the observed bacterial cell indicates that it is actively undergoing division, a crucial process for bacterial reproduction and population growth. Understanding the mechanisms of cell division in bacteria is important for studying their growth and development, as well as for exploring potential targets for antibacterial interventions.
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PLEASE ANSWER ASAP The diagram shows cross-cutting relationships among rocks. Which statement accurately describes the geologic features? D occurred after B. D occurred before A. A formed after the horizontal layer above was deposited. F formed before the horizontal layer above was deposited.
Answers
Answer:
A formed after the horizontal layer above was deposited.
Explanation:
In the given diagram following are the labeling for several ecologic features:
A - Folded rock strata
B - Large intrusion
C - Erosion angular unconformity
D - Volcanic di.ke
E - even younger rock strata
F - normal fault
As, A represent folded rock strata and layered rocks or folded rocks are formed when particles settle from water and air horizontally over the rocks.
Hence, the correct statement is "A formed after the horizontal layer above was deposited".
Answer:
A formed after the horizontal layer above was deposited.
Explanation:
Got 100% on culmative exam.
finish it
The feeling of the cold crisp Autumn air gave a feeling of comfort and purity. As the orange leaves of fall landed gracefully upon the floor, I knew what I had to do now..my time has come. I hoisted myself onto my steed, Riptide and rode into the night. the purpose of my mission kept my head high and my determination close to my chest. A few hours passed and we were finally at our destination. I tied Riptide to a fence post and walked up to the front door of a small cottage. Before I could knock on the door, the door creaked open and a small child that looked to be at the age of 8 stood before me. “Who are you?” she asked with a feeling of fear and untrust. I kneeled down and answered," A girl with a deal in mind and the loot to act upon it she wanted my horse to get passed by and her horse was her only way to travel, so i couldn't give up riptide. The girl had one other option is to find her missing ring all the way in Florida and at the time im all the way in new York i was doomed but the i remember the path i made with riptide long ago the route was from new York to Pennsylvania to west Virginia to north Carolina to south Carolina to Georgia finally to Florida finish this
Answers
Answer:
Grammar check and idea
Explanation:
”A girl (or woman) with a deal in mind and the loot to act upon it”. She wanted my horse but I could never give up Riptide. She offered to trade hers with mine but i refused, Riptide was too special to me.. to-. before I could finish my thought the girl started wailing like something a nomad like me has never heard before.She screamed of her lost ring in Florida that her late father had given her. However, we were in New York not Florida. I then remembered the path me and Riptide had taken and offered her to ride with me to find it since I needed to go there anyways to deliver medicine.
She enthusiasticly agreed and climbed onto my horse. I then hoiseted myself up once more and rode into the forest, just like i did when i was younger with a mission and a reward in mind…to see the gleaming faces of children again.
revise the whole narrative if you don’t wanna get a plagiarism check.
Hope this helps
Dont forget to smash that heart at the bottom
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Have a wonderful day
2. What do you think are the gases that enter a plant?
Answers
Answer:
Carbon dioxide, water, and sunlight I believe.
Explanation:
Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.
In a phospholipid bilayer, ___________ fatty acid tails face each other within the bilayer and form a region that excludes water.
Answers
Answer: Two
Explanation: Bilayer lipids are always 2
Which list shows the correct order of processes that occur before and during ovulation?
egg released from ovary - hormones send signal > egg travels to fallopian tube
O egg travels to fallopian tube → egg is released from ovary → hormones send signal
O hormones send signal → egg travels to fallopian tube > egg released from ovary
O hormones send signal → egg released from ovary → egg travels to fallopian tube
Answers
hormones send signal --> egg released from ovary --> egg travels to fallopian tube
Answer:
d
Explanation:
What mutation is this? Original DNA: ATT-CAG-TTG-GCA-AAA-ATC Mutated DNA: ATT-CAA-TTG-GCA-AAA-ATC.
Answers
The type of mutation where the change from a cytosine (C) to an adenine (A) in the second codon occurs is called a silent mutation because even though the DNA sequence has changed, the resulting protein sequence is unaffected.
The mutation in this scenario is a single nucleotide substitution, specifically a change from a cytosine (C) to an adenine (A) in the second codon (group of three nucleotides that codes for an amino acid) of the DNA sequence.
The original DNA sequence had the codon "CAG" which codes for the amino acid glutamine, but the mutated sequence has the codon "CAA" which codes for the same amino acid.
This type of mutation is called a silent mutation because even though the DNA sequence has changed, the resulting protein sequence is unaffected.
The mutation occurred in the non-coding region of the DNA sequence and did not change the amino acid sequence of the protein.
This type of mutation is relatively common and often goes unnoticed unless it affects a critical part of the protein sequence. Overall, this specific mutation is a minor change in the DNA sequence that does not have significant consequences.
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A mining company is interested in monazite, a mineral substance that forms in igneous rock in Earth’s interior. They think they found a lot of monazite in a sedimentary rock formation at Earth’s surface. Could this really be monazite? If so, how could the monazite have become part of sedimentary rock?
Answers
Answer:
Yes, it could have been monazite.
Monazite could have become part of sedimentary rock because it is formed during the metamorphosim of clastic sedimentary rocks. It is a resistant minerals that is found in weathered rocks debris which become concentrated and they are part of the soils and sediments found near weathered rocks.
Explanation:
Monazites are phosphate minerals that are found im small grains as accessory in igneous rocks and sedimentary rocks. It is formed during the crystallization of igneous rock and metamorphosim of clastic sedimentary rocks.
It is a resistant minerals that found in weathered rocks debris and become concentrated in sediments near weathered rocks.
Which of the following condensed general formulas represents alcohols?
A)ROR
B)RCOR
C)RCHO
D)ROH
E)RCOOH
Answers
Answer:
the answer is part d
Explanation:
(D) Roh
explain the effects of the production of large amounts of antidiuretic hormone in the human body
Answers
Answer:
Antiuretic hormone is a hormone that performs functions related to the reabsorption of water molecules through of the kidneys and with the decrease in the amount of urine accumulated in the body. An excess of antiuretic hormone conditions a retention of water and the elimination of sodium in the urine
Explanation:
Antidiuretic hormone (ADH) participates in regulating the water balance in the body, controlling the amount of water reabsorbed by the kidneys after they have filtered waste from the blood. Excess ADH leads to increased water reabsorption in the collecting duct, with increased urinary osmolarity. If there is too much ADH, water is retained, blood volume increases and affect can lead to nausea, headaches, disorientation, lethargy and hyponatraemia (decreased sodium concentration in the blood).
Which of the following microorganisms are NOT used in biotechnology as such? A. Bacteria B. Fungi C. Viruses D. Protozoans
Answers
\({ \tt{option \: (d)}} \: { \red{protozoans}}\)
Explanation:-
New organisms in biotechnology offer the possibility to detect novel products. It's good. But the role of protozoa in biotechnology has largely been ignored. We know that protozoa play important roles in treatment of com- munal and industrial wastewaters and some as parasites of man.
Karl is trying to describe Stonehenge to his friends. Which description is MOST
accurate?
(1 point)
a single giant stone in the middle of a clearinga series of slabs arranged like a giant
stage
O a series of slabs arranged like a giant stage
O a circle of ditches and several huge stones
O a statue of a Celtic goddess of the harvest
Answers
An example of the stonehenge is a statue of a Celtic goddess of the harvest. Option D
What is a stonehenge?A Stonehenge is a prehistoric monument located in Wiltshire, England, consisting of a ring of standing stones. The stones are believed to have been erected between 2500 and 2000 BC, and the purpose of the monument is still a mystery. Some theories suggest that it was used for religious or ceremonial purposes, while others propose that it had astronomical or calendrical significance.
The site is a popular tourist destination and is considered a UNESCO World Heritage Site.
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This is a view of the equine GI tract from the dorsal aspect. Identify the structure labelled C.O right ventral colonO abomasumO ascending colonO pancreas
Answers
The structure labelled C is right ventral colon. Option 1 is correct.
The structure labelled as "right ventral colon" is a segment of the large intestine in the equine gastrointestinal tract. It is located on the right side of the abdomen, and its function is to absorb electrolytes and water from the digesta passing through it. The right ventral colon is also important for forming fecal balls, which are then passed through the rectum and expelled from the body.
The equine gastrointestinal tract is complex, and proper management is crucial for maintaining the health and well-being of horses. Knowledge of the anatomy and function of each structure can aid in diagnosing and treating various conditions such as colic, diarrhea, and impaction. It is important for veterinary professionals and horse owners to be familiar with the equine GI tract to provide optimal care for their horses. Hence Option 1 is correct.
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