Chapter 21.1 Review
1. What characteristics of living things do viruses have?

2. Compare and Contrast How is viral reproduction different from that of cell-based organisms?

Answers

Answer 1

Answer:

1. Living characteristics of viruses include the ability to reproduce – but only in living host cells – and the ability to mutate.

2.Viruses cannot reproduce independently; cell-based organisms can reproduce independently.


Related Questions

Do you think new helpful species of bacteria will evolve with different functions? What would they do? What traits could they have to help them do these things?
please help

i will give brainliest and 5 * and 10 points for the best answer

i don't want to see any link as an answer

if i do you will be reported

Answers

My buddy is golf Wednesday night at the school and I’m going to go get a new car for a couple of hours to get my hair and then I’ll slap you ortepw and I don’t

what is the correct answer?

Answers

Answer:

Purple. Phenotype=visual characteristics

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food?
Viruses can use energy of living cells that they infect.
Viruses can replicate inside a host that they infect.
Viruses can cause contagious illnesses in host cells.
Viruses integrate their RNA or DNA into infected cells.

Answers

Answer:

Viruses can replicate inside a host that they infect. ... The epiglottis closes the air pathway so that food will not enter it.

Answer:

B.) Viruses can replicate inside a host that they infect.

Explanation:

I just finished this test and got it right. This was the answer for me

DNA undergoes ____to produce_____.RNA undergoes____to produce_____

Answers

I am not really sure but you can get the answer from it :

They discovered a fundamental mechanism of how proteins protect chromosomes while DNA is being copied (a process called DNA replication), which relies on a protein called RPA. Cells have a limited amount of this protein, which they use as 'band aids' to protect the DNA temporarily during replication.

which cellular processes would be directly affected by the improper functioning of mitochondria

Answers

Answer:

Cellular respiration

Explanation:

The Krebs cycle takes place in the mitochondria, so if the mitochondria wasn't able to function correctly, cellular respiration would be unable to take place.

scientists originally believed that intelligence was located in the _____ of the brain.

Answers

Answer: Frontal lobe

Explanation:

What does condensation release into the atmosphere?

Answers

Answer:

Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.

Explanation:

I hope this helps and pls mark me brainliest :)

All of the following adaptations allow for reproduction on land except
external fertilization.
eggs with sufficient food supply.
desiccation-resistant eggs.
amniotic eggs.

Answers

External fertilization (a) is the adaptation that does not allow for reproduction on land, while the other adaptations listed (b, c, d) enable successful reproduction in terrestrial environments.

The adaptation that does not allow for reproduction on land is a. external fertilization. External fertilization refers to the process of fertilization that occurs outside the body, typically in aquatic environments. This method is commonly observed in many aquatic organisms, where eggs and sperm are released into the water, and fertilization takes place externally.

On the other hand, the remaining adaptations listed (b. eggs with sufficient food supply, c. desiccation-resistant eggs, and d. amniotic eggs) are all adaptations that enable reproduction on land.

b. Eggs with sufficient food supply: Land-dwelling organisms, such as reptiles and birds, produce eggs with a sufficient food supply to support the developing embryo. These eggs contain nutrients and protective structures that allow for successful development outside of water.

c. Desiccation-resistant eggs: Many terrestrial organisms, including insects and amphibians, have evolved desiccation-resistant eggs. These eggs have specialized membranes and structures that prevent them from drying out in dry environments, enabling them to survive and develop on land.

d. Amniotic eggs: Amniotic eggs are a defining feature of reptiles, birds, and monotremes. These eggs have a specialized protective membrane called the amnion, which surrounds the developing embryo and provides a stable internal environment. This adaptation allows for the development and hatching of embryos on land.

Overall, external fertilization (a) is the adaptation that does not allow for reproduction on land, while the other adaptations listed (b, c, d) enable successful reproduction in terrestrial environments.

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ere are 5 sacral vertebrae that are fused into ____________ sacrum.There are ____________ cervical vertebrae, some of them containing a transverse foramen.There are ____________ thoracic vertebrae, most of them with a long spinous process.The vertebral column is composed of ____________ vertebrae distributed into 5 regions.There are ____________ to 5 bones in the coccyx, with variability in the fusion.There are ____________ lumbar vertebrae, which have large verte

Answers

Answer:

There are 5 sacral vertebrae that are fused into one sacrum. There are seven cervical vertebrae, some of them containing a transverse foramen. There are twelve thoracic vertebrae, most of them with a long spinous process. The vertebral column is composed of thirty-three vertebrae distributed into 5 regions. There are three to 5 bones in the coccyx, with variability in the fusion. There are five lumbar vertebrae, which have large vertebral bodies.

Explanation:

The vertebral column has 33 vertebras and five sections. They are the cervical spine with seven vertebrae, the thoracic spine with twelve vertebrae, the lumbar spine with five vertebrae, the sacrum with five fused vertebrae, and lastly, the coccyx with three to five vertebrae. The vertebrae in each section have different characteristics. For example, the length of the spinous process changes becoming longer as we descend in the cervical and the thoracic spine, or the body of the vertebrae has different shapes in each section, or the presence of the transverse foramen in the cervical spine, which allow the passage of a nerve plexus, an artery, and a vein. Each section, with its characteristics, aligns to form the vertebrae column containing and protecting the spinal cord.  

Which of the following molecules of RNA would you predict to be the most likely to fold into a specific structure as a result of intramolecular base-pairing?
Group of answer choices
5′-CCCUAAAAAAAAAAAAAAAAUUUUUUUUUUUUUUUUAGGG-3′
5′-UGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUG-3′
5′-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-3′
5′-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3′

Answers

The molecule: 5′-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3′ is the most likely to fold into a specific structure as a result of intramolecular base-pairing, option D is correct.

This is because it contains complementary regions that can form stable base pairs. Specifically, the sequence contains several repeated stretches of the nucleotide G, followed by A, forming G-A base pairs.

These repeated motifs increase the likelihood of stable base pairing interactions and formation of secondary structures, such as stem-loop structures. In contrast, molecules A, B, and C lack repeated motifs or complementary regions, making it less likely for them to form specific structures through intramolecular base-pairing, option D is correct.

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The complete question is:

Which of the following molecules of RNA would you predict to be the most likely to fold into a specific structure as a result of intramolecular base-pairing?

A) 5′-CCCUAAAAAAAAAAAAAAAAUUUUUUUUUUUUUUUUAGGG-3′

B) 5′-UGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUG-3′

C) 5′-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-3′

D) 5′-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3′

15. Cells found in plants and animals have similarities but can differ in function. Consider the following two organisms: a corn plant cell (Zea mays) and a camel cell (Bactrianus ferus). What is the best explanation for the difference in the cellular vacuole size between these two biotic organisms?

A. The corn cells' have a small vacuole size because it does not need long term water and
electrolyte storage.

B. The camel cells' have a small vacuole size because it does not need long term water and electrolyte storage.

C. The camel cells' have a small vacuole size because it is not in contact with toxins that need to be removed from the cell.

D. The corn cells' have a large vacuole size because it is in contact with many toxins in the soil which need to be removed from the cell.

Answers

The best explanation for the difference in the cellular vacuole size is option d. The corn cells' have a large vacuole size.

Explanation to the difference in the cellular vacuole size:

When there is the difference in the vacuole size that lies between the two biotic organism so it is due to the corn cells that contain high vacuole since they are in contact with various toxins in the soil that need to be eliminated from the cell.

hence, the correct option is d.

And, the rest of the options are wrong.

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What is the function of the flower of a plant?

Answers

Reproduction. The other answer is a hack. Any link with that beginning is just a spam/ hack.

Transport is the function of the protein known as hemoglobin . State the name and function of another protein. Do not use enzymes or membrane proteins for your answer . Name :

Answers

Answer:

keratin.

Explanation:

keratin is a fibrous protein that has protective and structural functions in the body.

to fulfil it's functional necessities keratin has characteristics that makes it insoluble and repellent to damage.

to fulfil it's functional necessities keratin has characteristics that makes it insoluble and repellent to damage.in the human body, keratin can be present in - hair and finger nails.

hope it helps. :)

Agriculture is the main sources
lincome of Nepal Justify
this statments
give me long answer ​

Answers

Answer:

Agriculture is the mainstay of the economy, providing a livelihood for more than 70% of the population and accounting for a little over one-third of GDP,” according to the CIA. “Industrial activity mainly involves the processing of agricultural products, including pulses, jute, sugarcane, tobacco, and grain.

Complete the sequences below: A T G C T A A C C T G C
DNA sequence: ______
mRNA sequence: ______
Amino Acids: ______

Answers

Answer:

DNA: A = T and T = A. C = G and G = C

T A C G A T T G G A C G

mRNA: A = T and T = U . C = G and G = C

T U C G U T T G G U C G

Amino Acids:

A = Adenine

T = Thymine

G = Guanine

C = Cytosine

U = Uracil

benzodiazepines are believed to be effective in treating generalized anxiety disorder because they mimic the effect of _____ at certain receptor sites in the brain.

Answers

Benzodiazepines are believed to be effective in treating generalized anxiety disorder because they mimic the effect of gamma-aminobutyric acid (GABA) at certain receptor sites in the brain.

What are Benzodiazepines?

Benzodiazepines (benzos) are a group of drugs that act as central nervous system (CNS) depressants and are mostly used to treat anxiety, panic disorders, and insomnia. They are thought to help patients by enhancing the neurotransmitter gamma-aminobutyric acid (GABA), which inhibits brain activity and induces relaxation and sedation.

In essence, benzodiazepines increase the efficacy of GABA, which is the main inhibitory neurotransmitter in the brain. As a result, they help to decrease the excitability of the brain's neurons, producing a calming effect and reducing anxiety, stress, and tension.

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List and describe three methods of nonpoint pollution control.
1.
2.
3.

Answers

Answer:

1. Protect drinking water by using less pesticides and fertilizers.

2. Reduce soil erosion by using conservation practices and other applicable best management practices.

3. Use planned grazing systems on pasture and rangeland.

a point mutation that changes a uac codon into a uag codon is a: missense mutation. nonsense mutation. silent mutation. frameshift mutation.

Answers

Answer: silent mutation

Explanation:

How does weathering of rock expanding and breaking rocks apart impact water quality?

answer asap please
thanks

Answers

Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth.

Which choice is involved in both sexual and asexual reproduction

Answers

A choice that is involved in both sexual and asexual reproduction are spores.

7. During DNA replication, a complementary strand of DNA is made for each original DNA strand. Thus,
if a portion of the original strand is CAGGTTACG, then the new strand will be
a. CAGGTTACG.
c. GTCCAATGC.
b. GTCCTTAGC.
d. GTCCTTACG.

Answers

Answer:

i think its b i took the test but i forgot the answer

Explanation:

a. 21. Angiosperms produce flowers, while gymnosperms do not. Which is a property of the flowers of angiosperms that is not shared by the reproductive structures of gymnosperms?
A. flower can produce many seeds at the same time.
b. The same plant can produce many flowers.
C. Flowers can be pollinated without the involvement of animals.
d. Flowers produce seeds that are encased in protective fruits ​

Answers

Answer:

Its not a flower can produce many seeds at the same time

Explanation:

D. Flowers produce seeds that are encased in protective fruits is a property of the flowers of angiosperms that is not shared by the reproductive structures of gymnosperms.

What are gymnosperms?

Gymnosperms are a group of seed-bearing plants that produce seeds that are not enclosed within a fruit. They are found in a wide range of habitats, from deserts to mountainous regions, and include many well-known species such as pine, spruce, and fir trees.

Gymnosperms are an ancient group of plants that have been around for over 300 million years, and they play an important role in many ecosystems by providing habitat, food, and other resources for wildlife and humans.

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The products or photosynthesis are carbohydrates and oxygen. Which process uses these substances as reactants?

Answers

Answer:

Respiration is the correct answer. Respiration process that occurs in the presence of oxygen is called aerobic respiration, generally seen among humans.

Explanation:

a random urine specimen and plasma glucose test that are to be drawn and collected at the same time can be used to confirm:

Answers

Non pathogenic Glycosuria

Certain types of fibers and other food components that are degraded by gi bacteria are called ____.

Answers

Certain types of fibers and other food components that are degraded by gastrointestinal bacteria are called fermentable substrates.

Fermentable substrates refer to dietary components that undergo fermentation by bacteria in the gastrointestinal (GI) tract.

These substances are typically resistant to digestion by human enzymes and reach the colon intact, where they serve as a source of energy for the resident gut microbiota.

Fermentation is a metabolic process carried out by bacteria, which involves the breakdown of complex organic compounds into simpler compounds such as short-chain fatty acids, gases (e.g., hydrogen, carbon dioxide), and other byproducts.

The gut bacteria possess enzymes that can break down specific fibers and other food components that are not digested by human enzymes in the upper digestive tract.

Examples of fermentable substrates include dietary fibers, such as soluble fibers (e.g., pectins, gums, inulin) and insoluble fibers (e.g., cellulose, hemicellulose), resistant starches, and certain oligosaccharides.

These substrates can be fermented by colonic bacteria, leading to the production of beneficial metabolites like short-chain fatty acids (e.g., acetate, propionate, butyrate) that provide energy to the colon cells and exert various health benefits.

The fermentation of these substrates by GI bacteria plays a crucial role in maintaining gut health, promoting the growth of beneficial bacteria, modulating immune responses, and influencing overall metabolic and physiological functions.

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"In fruit flies, eye color is a sex-linked trait: Red is dominant to white. What are the sexes and eye colors of flies with the following genotypes: XRX' XRY- XX: XRXR: d. XY: What are the genotypes of these flies: White eyed male: White eyed, female: red eyed female (heterozygous): d. red eyed_ male: Show the cross of a white eyed female XX' with red eyed male XRY. Show cross between pure red eyed female and white eyed male What are the genotypes of the parents How may are= White eyed and male: White eyed and female: Red eyed and male: Red eyed and female:"

Answers

The genotypes and eye colors of the flies are as follows:

XRX' and XRY: Red-eyed male and female, respectively.

XX: Red-eyed female.

XRXR: Red-eyed male.

XY: White-eyed male.

The genotypes of the parents in the crosses are:

1. White-eyed female (XX') and red-eyed male (XRY).

2. Pure red-eyed female and white-eyed male.

The number of flies with each eye color and sex cannot be determined without additional information or the specific inheritance pattern of the traits.

To determine the sexes and eye colors of fruit flies with the given genotypes, we need to understand the sex-linked inheritance of eye color in fruit flies.

X represents the X chromosome, and Y represents the Y chromosome, which determines the sex of the flies. The prime symbol (') denotes the mutant version of the gene.

Given genotypes:

1. XRX': This represents a red-eyed female.

2. XRY: This represents a red-eyed male.

3. XX: This represents a female with an unknown eye color.

4. XRXR: This represents a red-eyed female.

5. XY: This represents a male with an unknown eye color.

To determine the genotypes of flies with specific eye colors:

1. White-eyed male: The genotype would be XrY.

2. White-eyed female: The genotype would be XrXr.

3. Red-eyed female (heterozygous): The genotype would be XRXr.

4. Red-eyed male: The genotype would be XRY.

For the crosses:

1. Cross between a white-eyed female XX' and a red-eyed male XRY:

Genotypes of parents: Female (XX') and male (XRY)

Offspring: All female offspring will be red-eyed (XRX') and all male offspring will be white-eyed (XrY).

2. Cross between a pure red-eyed female and a white-eyed male:

Genotypes of parents: Female (XRXR) and male (XrY)

Offspring: All female offspring will be red-eyed (XRXr) and all male offspring will be white-eyed (XrY).

To summarize the genotypes of the parents and their eye colors:

White-eyed and male: XrY

White-eyed and female: XrXr

Red-eyed and male: XRY

Red-eyed and female: XRXr

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Which of the following has to be "tailed" before it migrates to the cytoplasm?
Group of answer choices, pick one:
mRNA
tRNA
pre-mRNA
rRNA

Answers

Pre-mRNA has to be "tailed" before it migrates to the cytoplasm, option C is correct.

Pre-mRNA is the initial transcript synthesized during transcription in eukaryotic cells. Before it can be transported from the nucleus to the cytoplasm for translation, the pre-mRNA molecule undergoes a process called RNA processing or RNA splicing. This process involves the removal of non-coding regions called introns and the joining together of coding regions called exons. Once the pre-mRNA has undergone splicing, it is converted into mature mRNA, which can then be transported to the cytoplasm for translation.

Pre-mRNA processing is a crucial step in gene expression regulation in eukaryotic cells. After transcription, the pre-mRNA molecule contains both introns and exons. Introns are non-coding regions that do not contain instructions for protein synthesis, while exons are the coding regions that contain the protein-coding sequences, option C is correct.

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The complete question is:

"Which of the following has to be ""tailed"" before it migrates to the cytoplasm?Group of answer choices, pick one:

A.mRNA

B.tRNA

C.pre-mRNA

D.rRNA"

On the African savanna, grasses feed wildebeest, gazelles, and hares. Lions, hyenas, and cheetahs hunt the wildebeest and gazelles. Vultures eat the remains from predator kills. Bacteria and fungi break down anything that is left over from the carcasses. Dung beetles eat the feces left behind from grass-eating animals like hares and elephants.

Which organism is a detritivore in this example?

Answers

Answer:

dung beetles

Explanation:

they reuse our waste for their needs

estimate how many calories a
person burns from physical activity.

Answers

Answer:

For men: 66 + (6.2 x weight) + (12.7 x height) – (6.76 x age)

For women: 655.1 + (4.35 x weight) + (4.7 x height) – (4.7 x age)

Explanation:

Describe the function of mRNA

Answers

Transcription is the process of copying a gene from the DNA into mRNA.
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What is the potential difference across the capacitor if the spacing between the plates is 2.60mm? I = P x A x T model can be used to calculate which of the following?a) level of urbanization b) people overpopulation c) rate of industrialization through collaborative negotiations both side work together to maximize the outcome or create a win-win result Which of the following null hypotheses is appropriate for an independent-measures t test?H: < 4H: 0H: = 0H: 0 for any data set, which measures of central location have only one value? which of the following is not one of the so-called ""three ds of economic cycle analysis?"" (a) dispersion; (b) drive (or momentum); (c) depth; (d) duration. The following items and amounts are taken from the 2021 financial records of Labrador Co. All amounts are U.S. dollars. Supplies expense... $32,000 Salaries payable.. $5,000 Equipment.. 72,000 Common stock.. 50,000Salaries expense.... 150,000 Cash.... 12,000 Utilities expense... 8,200 Retained earnings, Jan. 1, 2021...... 47,000Dividends.... 1,000 Insurance expense...... 12,000 Accounts payable.......... 6,000 Repair expense.. 14,000Accounts receivable........ 26,800 Service revenue.. 220,000a) Prepare an income statement for the year ending December 31, 2021. b) Prepare a statement of stockholders' equity for the year ending December 31, 2021. c) Prepare a balance sheet as of December 31, 2021. Make sure each statement is in proper form with a complete heading (name of company, name of report, date or time period as appropriate). Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units): Sales $ 45,000 Variable expenses 31,500 Contribution margin 13,500 Fixed expenses 8,640 Net operating income $ 4,860.1. If sales increase to 1,001 units, what would be the increase in net operating income?2. If sales decline to 900 units, what would be the net operating income?3. If the selling price increases by $2 per unit and the sales volume decreases by 100 units, what would be the net operating income?4. If the variable cost per unit increases by $1, spending on advertising increases by $1,350, and unit sales increase by 170 units, what would be the net operating income?5.What is the break-even point in dollar sales? The acceptable risk of incorrect acceptance is most related to:A) audit efficiency.B) audit results.C) audit effectiveness.D) audit estimation. (Sovereign Default Model) Let it be a risk free rate on the T-Bills. Let Dt be the amount of debt. When the government issues the amount of debt Dt and defaults on it, the household consumption with any given ne (0, 1) in the next period is given by C = (1-n)Y (Default)When the government does not default, the household consumption in the next period is given by C=Y1 Dt (No- Default)Finally, the income shock in the next period Yt+1 is uniformly distributed from 0.5 to 1.5. That is, the probability density function for Yt+1 is given by f(y)=1 if 0.5 Yt 1.5 (3) (4) f(y) = 0, otherwise a) An investor bought the bond issued by the government at the price of P. What is the return on this bond when the government defaults (i.e., compute id)? b) Let i = 0 and n = 0.4, and the investors are risk-neutral. (i) Find a range of Dt such that the bond price for this debt is the same as that for the T-Bills. (ii) Find a range of Dt such that the bond price is zero. (Note that D 0). (iii) Find a range of D, such that no investors would buy this bond in the government bond auction market. c) Let it = 0 and n = 0.4, Dt = 0.4, and the investors are risk-neutral. What is the probability of default on this debt, pa ? What is the sovereign spread on this debt when the government issues D = 0.4 amount of debt in the government bond auction market? how is a "learning relationship" different from many customer intelligence activities that companies have historically executed (e.g., marketing research, focus groups, etc.)? URGENT PLEASE HELP WITH TWENTY-FIVE POINTS:5. Write a short paragraph that explains the central idea of the article. Use at least two details from the article to support your response. conscious marketing values suggest that a company's rules should include a code of ethics and a system for defining what? . _____ contracts involve payment to the supplier for direct and indirect actual costs and often include fees.a. Firm-fixed-price b. Lump sumc. Cost-reimbursable d. Fixed-price incentive fee