Guys pls help me!!!!

The volume of Arwan’s piece of quartz is 303.42 cm³

Volume is described as a measure of occupied three-dimensional space or the amount of space that a substance or object occupies, or that is enclosed within a container.

Mass of the Quartz piece brought by Arwan = 788.9 g

Density of the quartz = 2.6g/ cm³

Density of the substance is described as mass present in per unit volume of the substance. It is measured in gram per centimeter cube.

Density = mass/volume

2.6 = 788.9/ volume

volume =  303.42  cm³ .

Density is denoted as mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume.

Density has the units of measurement in mass divided by volume such as grams per centimeters cube (g/cm3) or kilograms per liter (kg/l)

Learn more about volume at: https://brainly.com/question/463363

#SPJ1

The complete question is:

Arwan finds a piece of quartz while hiking in the mountains. When he returns to school, he takes it to his science teacher. She helps him determine the mass to be 788.9 g. She also tells Arwan that the density of quartz is 2.6 . What is the volume of Arwan’s piece of quartz?

The statement that is NOT true regarding glands is option d) Exocrine glands are also referred to as ductless glands.

This statement is incorrect because exocrine glands are the type of glands that release their secretions into a duct outside of the body, whereas endocrine glands are ductless and release their hormones directly into the bloodstream. Sweat glands are an example of exocrine glands that release sweat through ducts onto the skin's surface.

On the other hand, endocrine glands secrete hormones, such as the thyroid gland that secretes thyroid hormone directly into the bloodstream, and these hormones act on target cells to regulate various bodily functions.

Therefore, the option d) is not true as exocrine glands are not ductless glands but glands that have ducts to release their secretions outside of the body.

So, option d) is correct.

Learn more about glands:

https://brainly.com/question/1128099

#SPJ11

Answer:

55 graphics should be euown

Diversifying selection is the type of selection results in greater genetic variance in a population (option C)

When natural selection selects for two or more extreme phenotypes with distinct advantages, the genetic variance increases.

Average or intermediate phenotypes are often less fit than either extreme phenotype and are unlikely to feature prominently in a population under diversifying or disruptive selection.

Disruptive or diversifying selection causes a population's genetic variance to increase. This is due to the fact that disruptive selection favors two extreme phenotypes over the population mean, which stabilizes at an intermediate or single phenotype.

Disruptive selection, also known as diversifying selection, refers to population genetic changes in which extreme values for a trait are preferred over intermediate values. In this case, the trait's variance increases, and the population is split into two distinct groups. More people acquire peripheral character value at both ends of the distribution curve in this way.

The question is incomplete, it should be:

Which type of selection results in greater genetic variance in a population?

a. Stabilizing selection

b. Directional selection

c. Diversifying selection

d. Positive frequency-dependent selection

Learn more about diversifying here: https://brainly.com/question/29208511

#SPJ4

Dendrites and axons (terminal buttons) are the two specialized extensions of the neuron that allow it to communicate.

Dendrites- Appendages called dendrites are made to receive signals from neighboring cells. They take the shape of projections with a tree-like structure that are triggered by other neurons and carry the electrochemical charge to the cell body (or, more rarely, directly to the axons).

Axons- A neurons, or nerve cell, has a tiny fiber called an axon that extends from it and is in charge of sending electrical impulses to aid with movement and sensory awareness. A myelin sheath, a fatty layer which insulates and aids in signal transmission over long distances, surrounds each axon.

To know more about the Axons and Dendrites, click on the below link,

https://brainly.com/question/15978267

#SPJ1

Answer:

C

Explanation:

Semi means partly

permeable means allowing liquids or gases to pass through it

Semipermeable means allowing some, but not all, liquids or gases to pass through it.

Answer:

c) It is a barrier with tiny openings that let some, but not all, materials pass through.

Explanation:

The prefix "semi-" means "some; partially". "Permeable" means "allow to pass through". Using your knowledge of the purpose of the membrane and the meaning of the word "semi-permeable", you would use context to come to the conclusion that the correct answer is c) It is a barrier with tiny openings that let some, but not all, materials pass through.

Answer: Answer: preventing water from being wasted due to leaks

Explanation:

Water loss control has to do with the efforts which involves managing leakage to low levels.

From the excerpt, we can infer from the information given that 14 percent of the water treated by water systems is lost due to leaks. Therefore, the phrase "water loss control" simply means how water loss will be minimize.

The phrase "water loss control" means preventing water from being wasted due to leaks.

A water loss control program helps to identify real or physical losses of water from the water system and. apparent losses, the water that is consumed but not accounted for.

Water loss control includes

To know more about Water loss control here

https://brainly.com/question/27142250

#SPJ2

This is the match between meme style and its characteristic:

Reaction Photoshops are memes that use images of people reacting to something in a funny or interesting way. These memes are often used to express emotions or to share a funny observation. They reveal memes core purpose as a social connector because they allow people to share their thoughts and feelings with others in a humorous way.

Stock Character Macros are memes that use images of stock characters, such as stick figures or cartoon characters. These memes are often used to make jokes or to make fun of something. They take stereotypes to their extreme by exaggerating the characteristics of the stock characters.

Photo Fads are memes that use images that are popular on social media, such as selfies or pictures of food. These memes are often used to show off something that the person is proud of or to share a funny observation. They use images that are popular on social media to connect with others and to share their experiences.

Find out more on meme style here: https://brainly.com/question/30533767

#SPJ4

(a) For each time point, you need 1 Petri dish.

(b) For each time point of the growth curve, you need 3 bottles of saline.

(c) You plate 1ml of each of your 10e-4 and 10e-6 dilutions into the empty plates.

(a) For each time point, you only need 1 Petri dish. This suggests that the experiment involves a single sample or organism being cultured or observed at each time point. Using one Petri dish allows for the growth or observation of the organism without the need for additional replicates.

(b) For each time point of the growth curve, you need 3 bottles of saline. This indicates that the experiment involves diluting the samples in saline solution at each time point. Having 3 bottles of saline allows for creating multiple dilutions to assess different levels of concentration or dilution factors.

(c) You plate 1ml of each of your 10e-4 and 10e-6 dilutions into the empty plates. This means that a specific volume of the diluted sample is plated onto the empty plates. Plating different volumes helps in achieving varying cell densities on the plates, which may be necessary for obtaining accurate colony counts or observing specific growth patterns.

Learn more about Petri dish

brainly.com/question/28796560

#SPJ11

The most likely explanation for the high mutation rate in retroviruses like HIV and SIV is that retroviral envelopes are able to fuse with host cell membranes, causing spontaneous changes in the viral genome.Option (B)

Retroviruses like HIV have a protein envelope that surrounds their RNA genome. During the process of viral fusion, the envelope fuses with the host cell membrane, allowing the virus to enter the host cell and replicate its genetic material. This process can lead to spontaneous mutations in the viral RNA genome due to errors that occur during the fusion process.

The high mutation rate in retroviruses is also due to the fact that retroviruses like HIV have a reverse transcriptase enzyme that can transcribe the RNA genome into DNA. This process allows the virus to integrate its genetic material into the host cell genome, which can lead to further mutations.

In contrast, DNA viruses like herpesviruses have a lower mutation rate because they do not have a reverse transcriptase enzyme and their genetic material is more stable.

Therefore, the correct answer is B. Retroviral envelopes are able to fuse with host cell membranes, causing spontaneous changes in the viral genome.  

Learn more about  RNA genome

https://brainly.com/question/3520711

#SPJ4

During the Cretaceous period, high temperatures and abundant vegetation resulted in increased \(CO_2\) levels, leading to the accumulation of organic matter and the formation of good source rocks for oil and gas.

During the Cretaceous period, spanning from approximately 145 to 66 million years ago, the global carbon-climate cycle played a crucial role in the development of favorable conditions for the formation of good source rocks. The period was characterized by high global temperatures and abundant vegetation, resulting in increased carbon dioxide \((CO_2)\) levels in the atmosphere.

The elevated \(CO_2\) levels fueled vigorous photosynthesis, leading to the accumulation of organic matter in marine and terrestrial ecosystems. As this organic matter was buried and subjected to heat and pressure over millions of years, it transformed into oil and gas, creating potential source rocks. The warm climate and prolific vegetation during the Cretaceous, along with the subsequent geological processes, contributed to the formation of the rich hydrocarbon reserves that are vital to our energy resources today.

To learn more about Cretaceous follow the link:

https://brainly.com/question/2093019

#SPJ4

The correct question is:

Explain the global carbon-climate cycle during the Cretaceous period. (Write only one paragraph describing what happened during the Cretaceous geological period in order to have good source rocks.)

The genetic code is a set of rules that enable us to translate a nucleic acid sequence into an amino acid sequence. It works by assigning each of the four nucleotides (A, T, C, G) a specific 3-letter codon.

Each codon corresponds to a specific amino acid, allowing us to determine the sequence of amino acids in a protein from a given nucleic acid sequence. The genetic code is a universal code, meaning that any organism from bacteria to humans uses the same codon-to-amino acid mapping.

It is also a degenerate code, meaning that more than one codon can code for the same amino acid. This redundancy provides the genetic code with a high level of robustness, making it easier for organisms to tolerate mutations. The genetic code is also read in triplets, meaning that it is read in sets of three nucleotides at a time.

know more about genetic code here

https://brainly.com/question/29413263#

#SPJ11

complete question is :-

given the genetic code able to translate a nucleic acid sequence into an amino acid sequence. EXPLAIN.

A good way to define wilderness is as a landscape not impacted by humans. This means that it is an area where human activities have not significantly altered or influenced the natural environment. Wilderness areas are typically characterized by their pristine and untouched condition, free from human development or modification.

Another way to define wilderness is as a landscape so diverse as to be nearly impenetrable. This refers to ecosystems that are rich in biodiversity and exhibit a high degree of complexity. These landscapes can be challenging to navigate or explore due to their dense vegetation, rugged terrain, or lack of human infrastructure.

It is important to note that wilderness is not an ecosystem in need of development. Instead, wilderness areas are often protected and preserved to maintain their natural state and ecological integrity. Development activities, such as building structures or extracting resources, are generally restricted or prohibited in these areas.

Similarly, wilderness is not an ecosystem in a state of dysfunction. While natural ecosystems can experience disturbances and fluctuations, wilderness areas are typically characterized by their resilience and ability to self-regulate. These ecosystems are often considered to be functioning in a natural and balanced way.

In summary, wilderness can be defined as a landscape not impacted by humans or as a diverse and complex ecosystem. It is important to recognize that wilderness areas are typically protected and preserved to maintain their natural state and ecological integrity. They are not in need of development or in a state of dysfunction. Wilderness areas play a crucial role in biodiversity conservation, scientific research, and providing opportunities for recreational activities that allow people to connect with nature.

Learn more about wilderness  here:-

https://brainly.com/question/29769891

#SPJ11

Answer:

D. Each with one new strand and one original strand.

Explanation:

When DNA is uncoiled and strands are cut. Then new strands are formed. Each original strand give rise to complementary new strand.

The information from cytokines is relayed to the brain, specifically to the hypothalamus.

Cytokines are small proteins that have a major role in the immune system. These proteins play an important role in regulating the growth, differentiation, and activation of immune cells. Additionally, cytokines also affect the function of the central nervous system by influencing the behavior, mood, and cognitive function.The hypothalamus is a part of the brain that regulates many essential functions of the body, including body temperature, hunger, thirst, fatigue, and sleep.

It acts as a link between the nervous system and the endocrine system, which controls the release of hormones. The hypothalamus receives signals from cytokines and coordinates the body's response to inflammation. It also plays a crucial role in the regulation of the immune system by releasing hormones that stimulate the production of white blood cells in response to infections. Hence, the correct answer is the hypothalamus.

Learn more about Cytokines here: https://brainly.com/question/31427612

#SPJ11

The evolution of the swim bladder from the air-breathing organ (a simple lung) of an ancestral fish is an example of exaptation.

In evolutionary biology, the term "exaptation" is used to characterize a characteristic that has been appropriated for a purpose different than the one for which it was originally designed. The phrase was coined in 1982 by Stephen Jay Gould and Elisabeth Vrba to emphasize the idea that a trait's contemporary application does not always explain its historical genesis. As a counterargument to the idea of adaptation, they offered exaptation.

The earliest feathers, for instance, belonged to dinosaurs that could not fly. Therefore, they have to have initially evolved for another purpose. Early feathers might have been utilized for warmth or enticing mates, according to research. Later, though, feathers became necessary for modern birds to fly.

Learn more about exaptation here:

https://brainly.com/question/17610403

#SPJ4

Answer: Absent a gentle breeze or mighty gale to circulate both warm and cold weather around the Earth, the planet would become a land of extremes. Areas around the Equator would become intensely hot and the poles would freeze solid. Whole ecosystems would change, and some would completely disappear.

Answer:

The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion. The folds in the inner membrane are called cristae.

The statement that best describes the percentage of plagioclase feldspar in gabbro samples is that the percentage of plagioclase feldspar in gabbro can vary.

The true choice is D

Gabbro is a deep igneous rock, generally black, its minerals are coarse to medium-grained, and its specific gravity is 2.9 -3.21. The composition and percentage of its forming minerals is plagioclase (labradorite or bytownite) 70-45%, mafis minerals 2-50%, So the percentage varies.

The structure of the gabbro rock is massive, there are no cavities or air holes, or cracks. These rocks are fresh and have never been exposed to endogenous forces that can leave cracks in the rock. This rock has a faneric texture because the minerals can be seen directly with eye and large minerals indicate that these minerals were formed at a relatively slow freezing temperature so that the minerals form in large sizes.

Learn more about plagioclase feldspars of gabbro at https://brainly.com/question/22828801

#SPJ4

Answer: there is some control over price in monopolistic competition

Explanation:

proteins = glucose, oils, & enzymes are not correctly match the macromolecule.

The Primary structure include the linear structure of amino acids which form polypeptide chain by peptide bond, a covalent bond.

Secondary structure of protein defines a local folded structures due to  hydrogen bonding  between the amine and carboxyl group of the of polypeptide chain.

These structure can be either α – helix structure which represents the polypeptide chain formed by  twisting into a right-handed screw with the -NH group of each amino acid residue.

On the other hand, the β – pleated sheet structures consist of peptide chains are laid side by side together by intermolecular hydrogen bonds.

Tertiary Structure refers to folding of the secondary structure by H-bonds, electrostatic forces, disulfide bonds, and Vander Waals forces stabilize this structure.

Learn more about protein, here:

brainly.com/question/14652022

#SPJ2

In genetics, genotype refers to the collection of genes present in the DNA of an organism. The frequency of genotype dd in the next generation if the population mates at random will be 0.25.

What is the significance of the term population in biology?

A population is defined as a group of organisms of the same species that live in the same geographical location and interbreed with one another. The frequency of genotypes in a population is determined by the laws of inheritance and the random nature of mating. The frequency of alleles in a population may shift over time due to natural selection, genetic drift, migration, or mutation.

The Hardy-Weinberg law, on the other hand, can be used to determine the frequency of genotypes in a population if certain assumptions are met.

These assumptions are as follows: random mating, no mutation, no migration, no natural selection, and an infinitely large population.

The frequency of genotype dd in the next generation if the population mates at random will be 0.25.

If the frequency of the dominant allele D is p and the frequency of the recessive allele d is q, the Hardy-Weinberg law predicts that the frequency of DD is p², the frequency of Dd is 2pq, and the frequency of dd is q².

To know more about population, visit:

https://brainly.com/question/15889243

#SPJ11

Total volume of the bacterium the cell envelope involve is 0.000628

volume of the E. coli is 3.14× 0.4²×2

                                     = 1.0048

Total volume of the bacterium the cell envelope involve 2× 3.24× 0.01

                                                                                             =0.000628

Escherichia coli, otherwise called E. coli, is a rod-shaped, facultatively anaerobic, Gram-negative coliform bacteria tracked down in the lower digestive tract of warm-blooded creatures.

Ground meat specifically can be completely cooked to kill E. coli microbes. The liquids of ground hamburger ought to run clear and the meat ought to as of now not be pink. While cooking burgers, the thickest segment of the patty ought to enroll 160 degrees on a meat thermometer; the interior of the patty ought not be pink.

to know more about gram negative click here:

brainly.com/question/28540801

#SPJ4

Various forms of posttranscriptional processing in eukaryotes take place on the mRNA at specific locations. These include:

Internal processing: This occurs within the mRNA molecule, where introns are removed and exons are joined together through the process of splicing.

Alteration of 3' end: This takes place at the 3' end of the mRNA, where a polyadenylation signal is recognized, and a poly(A) tail is added for stability and export from the nucleus..

Alteration of 5' end: This occurs at the 5' end of the mRNA, where a 7-methylguanosine cap is added to protect the mRNA from degradation and facilitate translation initiation.

The addition of amino acid sequences is not a part of posttranscriptional processing, but rather a part of translation, which occurs later when the mRNA is used as a template for protein synthesis.

To learn more about : eukaryotes

https://brainly.com/question/15418347

#SPJ11

Increasing carbon dioxide in the atmosphere threatens marine life by a. acidifying the ocean.

Increasing carbon dioxide in the atmosphere threatens marine life by acidifying the ocean. This phenomenon, known as ocean acidification, occurs when excess carbon dioxide dissolves in seawater, leading to a decrease in pH levels.

As the ocean becomes more acidic, it poses a significant threat to various forms of marine life, including shell-forming organisms like coral reefs, oysters, and other shellfish. The acidic conditions make it difficult for these organisms to build and maintain their calcium carbonate structures, essential for their survival and growth.

Additionally, acidification can also impact the food chain by affecting the development and survival of small planktonic organisms that serve as a crucial food source for many marine species.

As a result, the overall ecosystem balance and biodiversity of marine environments are at risk.

Learn more about marine life

brainly.com/question/14950319

#SPJ11

A high-resolution transmission electron microscope (HR-TEM) can reveal several qualitative information about a material, including its crystal structure, lattice defects, grain boundaries, chemical composition, and the presence of nanoparticles or nanoscale features.

A high-resolution transmission electron microscope (HR-TEM) is a powerful tool for investigating the structure and properties of materials at the atomic scale. By using a focused electron beam to transmit through a thin specimen, HR-TEM can provide detailed qualitative information about the material under study.

Firstly, HR-TEM can reveal the crystal structure of a material. By analyzing the diffraction patterns produced by the electron beam interacting with the crystal lattice, researchers can determine the arrangement of atoms within the material.

Secondly, HR-TEM can identify lattice defects within a material. These defects include vacancies, dislocations, stacking faults, and other structural imperfections that can affect the material's mechanical, electrical, or optical properties. HR-TEM allows researchers to visualize and characterize these defects at high resolution.

Furthermore, HR-TEM can detect and analyze grain boundaries in polycrystalline materials. Grain boundaries are interfaces between adjacent crystalline grains and can significantly influence the material's properties. HR-TEM enables researchers to examine the structure and properties of grain boundaries, providing insights into the material's behavior.

Additionally, HR-TEM can provide information about the chemical composition of a material. By utilizing energy-dispersive X-ray spectroscopy (EDS) in combination with TEM, researchers can map and identify the elements present in the material, aiding in the understanding of its composition and elemental distribution.

Lastly, HR-TEM is capable of visualizing nanoparticles and nanoscale features within a material. The high-resolution imaging capability of HR-TEM allows for the observation and characterization of nanoscale structures, such as nanoparticles, nanotubes, and nanowires, providing valuable insights into their size, shape, and arrangement.

In summary, a high-resolution transmission electron microscope (HR-TEM) can reveal qualitative information about a material's crystal structure, lattice defects, grain boundaries, chemical composition, and the presence of nanoparticles or nanoscale features. This information is crucial for understanding the material's properties and behavior at the atomic and nanoscale levels.

To learn more about transmission electron microscope visit:

brainly.com/question/28804998

#SPJ11

Answer:

The different ways are as follows....

1. Genetic Drift(Accidental changes in the genes)

2. Mutation(change in the DNA sequence of an organism)

3.Natural Selection (populations of living organisms adapt and change)

In response to stimulation by gravity, auxin promotes the growth of root cells and causes the cells of the upper surface to elongate more quickly. This process is known as gravitropism.

Gravitropism where the auxin accumulates on the lower side of the root, stimulating growth in that area and causing the root to bend and grow towards the direction of gravity. This mechanism helps the plant to establish a stable and functional root system, which is essential for its survival and growth.

Hence,  This process is known as gravitropism, where plants respond to gravity by directing their growth. Auxin, a plant hormone, plays a crucial role in this response by regulating cell growth and elongation in different parts of the plant.

To know more about Gravitropism refer here :

https://brainly.com/question/3230363

#SPJ11

South Africa’s history of apartheid contributed to today’s poaching like that the UDF tried to a great extent to stop the apartheid that existed in South Africa in the 1980.

The full of UDF is United Democratic Front and it is known as the party in South Africa which is considered as the political party of South Africa. The party has been made a lot of contributions during these periods. They helped to promote as well as boycotts in the country and school protests.

As an anti apartheid body, they incorporated several other organizations that joined in the fight. The aim of the party or United Democratic Front was to fight for social democracy and sustainable development in the nation.

Therefore, South Africa’s history of apartheid contributed to today’s poaching like that the UDF tried to a great extent to stop the apartheid that existed in South Africa in the 1980.

Learn more about  apartheid on:

brainly.com/question/1380803

#SPJ1