Virus structure includes bio molecules such as proteins and nucleic acids.__________ If false, why?

Answer:

c. By infecting living cells

Explanation:

c. By infecting living cells

Answer:

By infecting living cells

Explanation:

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Answer:

There are 15 ways to select 2 bracelets.

There are 10 ways to select 2 pieces of jewelry that are not bracelets.

How many ways can Lauren select 4 pieces of jewelry, of which exactly 2 are bracelets?

150

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Explanation:

The question relates to the mathematical field of combinatory, particularly combinations. To find the total ways Lauren can choose her jewelry, we use the formula '(n choose 2) * (m choose 2)', where n is the number of bracelets and m is the number of other jewelry items.

The subject of this question appears to be related to combinatorics, specifically, combination. If we suppose that there are 'n' bracelets and 'm' pieces of jewelry that aren't bracelets, Lauren has 'n choose 2' ways to select the bracelets and 'm choose 2' ways to select the other pieces of jewelry. Therefore, the total number of ways in which Lauren can choose her jewelry is the product of the two, i.e., '(n choose 2) × (m choose 2)'.

For example, if Lauren has 3 bracelets and 4 other types of jewelry to choose from, she can select the bracelets in '3 choose 2' = 3 ways, and the other pieces of jewelry in '4 choose 2' = 6 ways. Thus, she has a total of 3×6 = 18 possible ways to choose 2 bracelets and 2 other pieces of jewelry.

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Answer:

For food

Explanation:

Dolphins are aquatic animals while Man are terrestrial beings. Man controls almost all the regions of the earth and get food from both land and water.

The Dolphins gets its food to stay alive by feeding on other small aquatic animals such as fish, shrimp, etc . These foods are also well sought by man which brings a certain type of competition for these sea foods between Man and Dolphins.

Answer:

Humans and dolphins are competing with each other in the predation of aquatic animals.

Explanation:

As you may already know, the dolphin is an aquatic animal that feeds on smaller fish, shrimp and some other marine products. Dolphin feeding reduces the amount of marine animals that humans can fish for food.

In addition, dolphins establish some damage to fishermen, as they can curl up in fishing nets and tear them, making them unsuitable for fishing.

Answer:

Does the organism have legs?

Does the organism reproduce asexually?

Can the organism ferment?

Is the organism infectious?

Explanation:

The questions HAVE to be yes or no, in order for it to effectively determine which species is which.

Answering a sequence of questions based on opposing qualities (such physical attributes) that have two viable answers is a technique used to identify a species.

An instrument known as a dichotomous key is used to recognize living things or inanimate objects found in the natural world, such as plants, animals, or rocks.

The key is made up of a sequence of paired assertions or hints regarding traits or qualities that operate as a step-by-step manual for recognizing each thing.

Therefore,  Dichotomous key of brewer’s yeast (saccharomyces cerevisiae) e. coli bacteria (escherichia coli) green hydra (hydra viridissima) house cat (felis catus)

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Answer:

Because Primary producers like plants are capable of making their own energy from the sun.

Explanation:

Producers make up the bottom of a pyramid. There are many organisms that feed on these producers and use their energy in their own biological processes. These organisms are higher in the pyramid.

Autotrophs are on the bottom of the energy pyramid; Because Primary producers like plants are capable of making their own energy from the sun.

The sun's energy is converted into biomass by autotrophs, the producers in a food web.

Each of the trophic level results in a drop in biomass. The Lower trophic levels always have more biomass than higher trophic levels.

Autotrophs are able to produce their food through photosynthesis; which means they provide food for all other creatures.

The Producers make up the bottom of a pyramid. There are lots of organisms that feed on these producers; use their energy in their own biological processes. These organisms are higher in the pyramid.

Autotrophs are on the bottom of the energy pyramid; Because Primary producers like plants are capable of making their own energy from the sun.

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Answer:

Cellular respiration and photosynthesis.

Explanation:

Answer:

Which characteristic would most likely remain constant when a limestone cobble is subjected to extensive abrasion

Composition

Explanation:

The constituents of cobble still remain irrespective of the extensive abrasion that it might be done on it. the composition remain the same

Answer:

A. The man's genotype is Bb. Phenotypes of the offsprings:- heterozygous brown-eyed- homozygous blue eyedGenotypes of the offsprings:- Bb- bbb. The blue is recessive, so the woman's genotype is bb. It is impossible for her to have B because it is dominant over b.c. The woman can only produce bb or blue-eyed.d. The man's genotype is Bb. It is impossible for him to produce an offspring with blue-eyes if his genotype is BB.e. The man can produce Bb or brown-eyed and bb or blue-eyed.

Explanation:

Answer:

21 chromosomes

Explanation:

Meiosis is a type of cell division that produces 4 haploid daughter cells (i.e., gametes) from a single diploid cell. This parental cell undergo one (1) cycle of DNA replication and two (2) cell divisions, thereby, in the case of the Norway rats that have 42 chromosomes, the final number will be 21 (21 x 2= 42)

Answer:

21 chromosomes and 21 molecules of DNA at the end of meiosis II

Explanation:

The end of meiosis II that occurs on each cell will give rise to four mature cells, or gametes, and each cell will have 21 chromosomes because the number of each cell has to be half of the initial diploid cell to allow the correct number after the formation of the zygote. Each cell will also contain 21 molecules of DNA because the mature cell after the meiosis has to be haploid.

Final answer:

The skin lesion described is probably not melanoma due to its regular borders and uniform pigmentation. It is more likely to be a dermatofibroma due to its benign characteristics. The correct answer is: D) Dermatofibroma

Explanation:

The lesion described in the question is a medium brown circular lesion with regular borders, evenly pigmented, and approximately 7 mm in diameter. According to the ABCDs of skin cancer, concerning characteristics include asymmetry, irregular borders, varied colors, and a diameter greater than 6 mm. Additionally, evolving shape and elevation are signs to watch for. The lesion here does not fit these criteria well, thereby making melanoma (option A) less likely. A dermatofibroma often presents as a firm, benign skin lesion with a smooth or slightly irregular border, varying in color from brown to pinkish, and they can sometimes be mistaken for moles. Dermatofibroma is a more appropriate diagnosis given the described characteristics.

Answer:

C) Viruses cannot reproduce outside a host cell and are therefore nonliving.

Explanation:

Viruses cannot reproduce outside a host cell and are therefore nonliving. Their cell walls are created from different substances and bacteria has an RNA polymerase that archaea lacks.

Answer:

C

Explanation:

Answer:

C) primary cell wall → plasma membrane → cytoplasm → vacuole

Explanation:

Structurally from  the soil into the roots, the structure of the root cells is such a way that  k+ enters with water through the primary cell wall → plasma membrane → cytoplasm → vacuole of  the root hairs, and move through apoplastic and sympathic pathways from  the root hairs .

From the root hairs they moved in mass flow in  the xylem vessels. They reentered apoplastic and sympathic pathways again to reach different parts of the plants.

Due to the facts that K+ in the roots cells are of lower water potential,soil water K+  can also move by active transport and facilitated diffusion  from the soil into the (primary cell wall → plasma membrane → cytoplasm → vacuole roots,) and later switch to apoplastic and sympathic pathways to reach plant parts.

A potassium ion moving from the soil into a plant cell first encounters the primary cell wall, then the plasma membrane, followed by the cytoplasm, and finally it reaches the vacuole. Hence, the correct sequence is primary cell wall → plasma membrane → cytoplasm → vacuole. Hence the correct option is (C).

When a potassium ion (K+) moves from the soil into a plant root cell, the order in which it encounters the cellular structures is important. The correct sequence is as follows: the potassium ion first interacts with the primary cell wall, which is the outermost layer.

Following this, it passes through the plasma membrane, which regulates the movement of substances into and out of the cell. After crossing the plasma membrane, it moves through the cytoplasm of the cell, which is the substance inside a cell where most of the cell's metabolic reactions occur.

Finally, the potassium ion reaches the vacuole, a cellular organelle that stores nutrients and aids in waste disposal. Therefore, option C) primary cell wall → plasma membrane → cytoplasm → vacuole describes the correct order of structures encountered by the ion.

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Answer:

A cell membrane is made of two layers.

The cell membrane is composed by a phospholipid bilayer where the interior side is hydrophobic and non-polar, while the outside is hydrophilic and polar

Pores and proteins in the cell membrane allow passage through it.

The pores and proteins in the cell membrane have several functions such as, for example, cell signaling (proteins) and selective transport (pores)

Pores and proteins in the cell membrane allow passage through it.

 A cell membrane is made of two layers.

Answer:

It is a tissue that consists of living cells that are thickened at all over the corners by the deposition of extra cellulose, to provide support and mechanical strength. They are usually polygonal elongated cells with tapering ends.

Collenchyma is found in the primary tissues of the plant. It is therefore, an important supporting tissue in young plants, herbaceous plants or plant organs, such as leaves, in which secondary growth does not occur.

Answer:

A Collenchyma is essentially a form of tissue that is bolstered by the condensing/thickening of cell walls.

Answer:

Two chromosomes that are similar but not identical are called homologous chromosomes. When the chromosomes are duplicated, two identical chromosomes are called sister chromatids.

Explanation:

Answer:

Harlem Renaissance in upper Manhattan

Explanation:

Final answer:

Zora Neale Hurston and Langston Hughes were influential figures in the Harlem Renaissance, a period of African American cultural expression in the 1920s and 1930s. Their works celebrated African American heritage, addressed racial prejudice, and laid a foundation for future American art and literature.

Explanation:

Harlem Renaissance Luminaries: Zora Neale Hurston and Langston Hughes

Zora Neale Hurston and Langston Hughes were prominent figures who flourished during the Harlem Renaissance, a vibrant period of African American cultural expression that began around 1920 and extended into the mid-1930s. Hughes was widely recognized as a prolific writer, leaving a significant mark with his poems such as "The Negro Speaks of Rivers" and "I, Too, Sing America," which celebrated African-American heritage and the resilient spirit of the community. Hurston, although her most famous novel "Their Eyes Were Watching God" was published in 1937, was a key literary figure whose work depicted the life and dialect of rural black communities, celebrating black dialogue and addressing racial prejudice and stereotypes. Together, these artists contributed to the creation of a unique and independent black culture that fueled racial pride and was distinct from the emulation of European or white American cultural norms.

Their works, among others, laid the groundwork for a new American literary and artistic landscape, rejecting European standards that had previously dominated and instead forging an original path that would inspire future generations. Not only did they address the struggles of black Americans, but they also countered pervasive racial stereotypes and encouraged African Americans to band together to fight against racial prejudice. The Harlem Renaissance was marked by such literary and artistic achievements, and it stood as a dynamic era of creativity and self-expression that profoundly influenced American art, literature, and culture.

Answer:

The correct answer is C.) Chimpanzees and humans have nearly identical DNA.

Answer:

C) amino acids

Explanation:

Amino acids were found in the "goo" in the beaker of the Miller-Urey experiment. Therefore, option (C) is correct.

The Miller-Urey experiment was a landmark experiment conducted in 1952 by Stanley Miller and Harold Urey to investigate the origin of life on Earth. The experiment aimed to simulate the conditions of the early Earth and test whether organic molecules, the building blocks of life, could be formed spontaneously from inorganic compounds.

The experiment produced a variety of organic compounds, including amino acids, which are the building blocks of proteins. The results of the Miller-Urey experiment provided evidence that the building blocks of life could have formed spontaneously on the early Earth.

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Answer:

1) reproduction, heredity,

2) variation in fitness or

30 organisms,

4) variation in individual characters among members of the population. If they are met, natural selection automatically results.

Explanation:

Answer:

C.) Warm and wet

Explanation:

Warm and wet is the most logical because increased moisture and temperature directly affects the speed of which natural chemical reactions in rocks, for example, hydrolysis.

Answer:

Landscapes will undergo the most chemical weathering if the climate is

cool and wet

Explanation:

Erosion caused by chemical disintegration which only happens only when the climate is cool and wet

Answer:

Explanation:

As given here as a mutation occurs in an original DNA template that changes the DNA, by transcription this mutation passes into RNA and changes the RNA, but it does not change the protein sequence, it means that this mutation could be silent mutation.

Silent mutation is the mutation which cause the change of a base in that, after the mutation the codon codes for the same amino acid, or the amino acid which do no cause any change in the protein, hence these changes do not affect the function of a protein.

A silent mutation is a type of mutation that does not change the protein sequence. It has no significant impact on the function or phenotype of the organism.

The mutation described in the question is a silent mutation. This type of mutation occurs when a change in the DNA sequence does not result in a change to the amino acid sequence of a protein. It typically involves a substitution of one nucleotide for another, which still codes for the same amino acid. As a result, the protein sequence remains unchanged.

The consequence of this original change is that there would be no significant impact on the function or phenotype of the organism. Silent mutations are often considered neutral mutations because they do not affect the protein's structure or function. They can accumulate in a population over time without causing any noticeable changes.

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Answer:

Salmonella are made of Flagella which prevent it from being phagocytosed.

Flagella is a long filamentous organelle responsible for bacterial motility. falgella are present exteranlly in all three dimensionally in salmonella and it helps salmonella to swim in liquid conditions and rotates the flagella on firm surfaces.

Flagella is known as PAMPs (pathogenic molecular patterns) in salmonella which is used by the host to identify bacteria and activate the immune system of the bacteria.

Hence, rotating or motility and immune function of flagella in salmonella prevent it from being phagocytosed.

Answer:

A laboratory mouse homozygous for a specific allele is mated to a wild mouse that is heterozygous for that allele. One of the heterozygous individuals resulting from this cross is mated back to the wild field mouse parent. What proportion of the offspring will have the same genotype as the original laboratory mouse?

RR x Rr= RR, Rr, RR, and Rr 4:0 genotype

Rr x Rr= RR, Rr, Rr and rr 2:2 50:50%

50% of the offspring will have the same genotype as the original laboratory mouse

Explanation:

Answer:Eradication of the virus allowed the wildebeest population to rebound from around 200,000 animals in 1958 to around 1,200,000 in the late 1970s. Following this steep increase, the population stabilized.

Explanation:

The trends in the wildebeest population over time when compared to the population affected by rinderpest disease is maybe reproduction of the wildebeest after rinderpest vaccination worked on them.

Cattle, wildebeest, and other animals with feet are susceptible to the viral disease known as rinderpest. For many years, the Serengeti region's cattle and wildlife had been afflicted by the disease.

My initial hypotheses for why the trends in the wildebeest and buffalo populations resemble each other are that both animals rose over time as a result of rinderpest vaccination or treatment, which boosted the trends for both animals.

Therefore, after the virus was eradicated, the wildebeest population recovered, increasing from 200,000 animals in 1958 to 1,200,000 in the late 1970s. The population stabilized after this abrupt rise.

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Answer:

The bacterial DNA gets degraded at step 3 of the viral lytic cycle.

Explanation:

Viruses are organisms that are incapable of replicating on their own, hence, they require a living host which they infect and use its replicational ability to reproduce theirselves. The infection cycle of this virus is regarded as its replication cycle. Viruses employ either the LYTIC or LYSOGENIC cycle for infection.

The lytic cycle involves killing of their host cell at the end of the cycle. Generally, the cycle starts with the attachment of my the virus to the cell membrane of its host using specific receptor sites (step 1). It then penetrates the host cell as seen in step 2.

After penetration, the virus then secretes certain degrading enzymes called ENDONUCLEASES that degrades the bacterial DNA. After which the virus uses the replicational and gene expressing ability of the host to transcibe its genetic material and replicate itself. This process called SYNTHESIS occurs in step 3.

Hence, the yellow ring in the image that represents bacterial DNA disappears in step 3 (synthesis stage) because it gets degraded by viral digesting enzymes.

Answer:

This supports Darwin's theory of evolution, which states that simple life forms gradually evolved into more complex ones. Evidence for early forms of life comes from fossils. By studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.

Explanation:

Answer:

Explanation:

The fossil record shows gradual changes in species, and reveals how different organisms came to be what they are

Beneficial mutations are more likely to become common in a population through natural selection, as they enhance survival and reproductive success. These mutations can lead to advantageous traits becoming widespread and potentially fixed within a population's gene pool over time.

Beneficial mutations are more likely to become common in a population through natural selection. Mutations are changes to an organism's DNA and can introduce new genotypic and phenotypic variance. While some mutations may be detrimental or neutral, it is the advantageous mutations that play a crucial role in the process of evolution. Beneficial mutations help organisms survive, reproduce, and better adapt to their environment, thereby increasing the likelihood of being passed on to future generations.

For example, in a population of mice living in a woodland environment, a mutation that causes fur color to closely match the forest floor can lead to a form of stabilizing selection, where mice with this coloration are less likely to be predated and more likely to reproduce. Over time, such beneficial traits may become widespread within the gene pool. Similarly, certain alleles can become fixed in the population, which means every individual carries that allele, as it offers a significant reproductive advantage.

An allele frequency can change via natural selection when the allele provides a phenotype that enhances survival or reproductive success. Such alleles will be in greater frequency in subsequent generations, potentially leading to fixation of the allele in the population and a corresponding decrease in other alleles.

Final answer:

Beneficial mutations are more likely to become common in a population through natural selection by helping organisms adapt and increase their chances of survival and reproduction.

Explanation:

Beneficial mutations are more likely to become common in a population through natural selection. Beneficial mutations are mutations that have a positive effect on the organism, helping it to better adapt to changes in the environment. These mutations increase the organism's chances of surviving or reproducing, making them more likely to be passed on to future generations and become more common in the population over time.

Answer:

The characteristic of Knowledge of facts cannot be inherited.

Explanation:

Answer:

The correct answer would be B) 3 deaths, 6 births, 5 immigration, 7 emigration.

Explanation:

The study of a living being is called biology.

The Correct Answer is B.

The number of species counting in a population is called a census. The factors which are changing the population count is as follows:-

The Formula used to check the population growth is

N = (B+I) - (D+E).

After putting the value the population is same as the 2013 year is option 3 that is 3 deaths, 6 births, 5 immigration, 7 emigration

Hence, the correct option is B.

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Answer:

Salivary amylase becomes inactive in stomach. Carbohydrate digestion halts until the bolus enters small intestine.

Explanation:

Salivary amylase is present in saliva and breaks down starch in food thus it helps in carbohydrate digestion. The optimum pH for its working is 6.8. As the bolus enters the stomach, pH drops drastically. Gastric juice has pH around 3. Salivary amylase is not able to function in such a low pH and becomes inactive in stomach. As a result, carbohydrate digestion halts in stomach. Gastric juice has its own amylase but it does not digest the starch much.

As the bolus enters the small intestine, the acidic pH is restored to neutral value. Carbohydrate digestion restarts with the help of pancreatic amylase.