Which of the following is a substance made up of only one type of atom?
A Cell
B Compound
C Element
D Water

The book Silent Spring primarily focuses on the environmental problems associated with pesticide toxicity.

Rachel Carson is the author of the book that lends itsself to environmental concerns called "Silent Springs". This book was a best seller in the 19060s and opened the floor for discussion on environmental issues.

The book Silent Spring primarily focuses on the environmental problems associated with pesticide toxicity.

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Answer:

cell got damaged I think

The life cycle of a star with a mass of 10,000 will begin with the formation of a protostar within a cloud of gas and dust.

A star with a mass of 10,000 times that of the Sun will follow a life cycle that begins with the formation of a protostar within a cloud of gas and dust.

As the protostar accretes more mass, it will eventually reach a critical point and ignite fusion reactions, becoming a main-sequence star. After several million years, the star will exhaust its hydrogen fuel and expand, becoming a red giant.

In this phase, the star will fuse heavier elements in its core, leading to the formation of a dense core of iron. Once the core reaches a critical mass, it will collapse in a supernova explosion, leaving behind either a neutron star or a black hole. The surrounding gas and dust will be expelled into space, where it may eventually form new stars and planets.

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The mainstem bronchus ends at the level of the lobar bronchi.The mainstem bronchus is a large airway that branches into the left and right lung at the carina, which is the point where the trachea bifurcates.

The lobar bronchi, also known as secondary bronchi, are the first branches of the mainstem bronchi that enter the lungs and supply each lobe of the lung. Beyond the lobar bronchi, the airways continue to divide into smaller bronchi, bronchioles, and ultimately end in the alveoli, where gas exchange occurs.

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Answer:

Because the moon rotates around the Earth and is not in the same position every night

Explanation:

Answer:

Meiosis I, a reductional division of two haploid cells produces offspring cells that are not genetically identical with the event of recombination. Haploid girl cells have half the original/parent cell chromosomes.

Explanation:

meiosis II, an equational or mitotic division, divides the haploid cells created in meiosis I to produce four identical daughter cells that ultimately form the male/female gametes (egg/sperm).

Here chromatids split in contrast to meiosis I when homologous chromosomes apart.

Answer: Fungi can be single celled or very complex multicellular organisms.

have a great day/night and go crush that homework/class! you are loved

The homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.

The mutation rate indicates the number of nucleotide differences between two homo-logous sequences that emerged in evolution in a given period of time.

In this case, the mutation rate is one nucleotide per 330,000 years and here we have two mutations (CTGTCCGAAG and CTGTCCGTCG), thereby it is expected that the sequences diverged 660,000 years ago.

In conclusion, the homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.

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Answer:

Yes

Explanation:

Genetic drift refers to a random change in the allelic frequency of a population through many generations. The founder effect is an especial case of genetic drift. Yes, the resistance allele was also at the Original Farm.

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Before answering, let us review some framworks.

The exposed example refers to a founder effect -genetic drift- event.

Some chickens were taken from the original population to another farm.

Bacteria in these chikens could or could not be genetically representative of their original population.

What does it mean?

 It means that probably the allele that causes resistance was present in the original population.

Individuals carrying the allele were taken to the new farm where it randomly increased its frequency.

So in the new farm the new population expresses a high frequency of the resistant allele.

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An investigator conduct laboratory tests on unburned control material collected from a fire scene to analyze the breakdown products A gas chromatograph is most often used to detect and characterize recovered flammable residues.

Laboratory tests, Analyses of the breakdown products produced by the material's exposure to intense heat during the fire can be performed in the laboratory on unburned control material. Analytical chemistry commonly employs gas chromatography for the separation and analysis of compounds that can be vaporized without decomposition.

The gas chromatograph is the most delicate and solid instrument for distinguishing and portraying combustible buildups. Accelerants like gasoline and kerosene are what start the majority of arsons.

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Answer:

Its called the deoxyribonucleic acid or it can be referred to your double helix that your genes are made of or a MtDNA

Explanation:

Let me know if this helps

Answer:

Answer:

Enrique made a list of things he needed from the store. He listed all of the fruits, then the dairy, and finally, some household cleaning items. Enrique's list is an example of a __________.

A.

semantic network

B.

conceptual hierarchy

C.

schema

D.

concept

B.

conceptual hierarchy

Explanation:

pls give me points

Pam is blue, whereas Ned is pink.

White woman named Pam resides in Tobin's trailer park. She is Laura's stepmother and the mother of Bliss, Sandra, Kristen, and an unnamed baby girl. She uses crack, and so does her lover, Ned. When Pam and her family are kicked out of Tobin's trailer park, Pam is pregnant.

Landlord expelled Arleen Bell and her boys Jori and Jafaris after learning of the damage. Arleen and her sons relocated to the Lodge, a refuge. Later, they went from house to house.

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Individuals would do all the sustainable wastewater that are mentioned, which are using biodegradable flushables, using prescription drugs and using trash bins instead of flushing sanitary napkins. Thus, option B is correct.

Sustainable wastewater management has been the need of the hour, as the using water in the way that would meets the current, ecological, social, and economic needs of an individual.

In order to increase the efficiency of the wastewater reuse by encouraging water reuse, reduction or recovery in our day to day lifestyle.

Therefore, Individuals would do all the sustainable wastewater that are mentioned, which are using biodegradable flushables, using prescription drugs and using trash bins instead of flushing sanitary napkins. Thus, option B is correct.

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Answer: Phospholipids

Explanation:

Phospholipids are arranged in a bilayer. This makes up the basic fabric of the plasma membrane.

Cholesterol molecules are distributed preferentially between membrane phospholipids. This helps to keep cell membranes from stiffening by preventing phospholipids from being packed too closely around each other.

The plasma membrane, also known as the cell membrane, is the membrane found in all cells that differentiates the cell's interior from its surroundings.

A cell wall is connected to the plasma membrane on the outside of bacterial and plant cells.

Membrane biogenesis is the process by which plasma membranes form. Proteins as well as lipids are created first in the rough endoplasmic reticulum and then in the smooth endoplasmic reticulum. These are then delivered to the Golgi complex for adjustment.

The basic material of the plasma membrane is composed of phospholipids arranged in a bilayer.

They are amphipathic, which means they have both hydrophilic and hydrophobic regions, making them ideal for this role.

Thus, phospholipids helps the membrane to keep its shape and fluid qualities.

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The correct answer is option c, "Cloud; Decrease". When sulfur dioxide reacts with water vapor and dust in the upper atmosphere, it creates sulfuric acid droplets which form clouds. These clouds then reflect sunlight back into space, causing a decrease in temperature.

Global dimming is the gradual reduction in the amount of sunlight reaching the Earth's surface. It is caused by the presence of microscopic particles in the atmosphere, such as sulfate aerosols, black carbon, and other pollutants. These particles reflect and absorb some of the incoming sunlight, reducing the amount of energy that reaches the Earth's surface.

The effect of global dimming is complex and can have both positive and negative consequences. On the positive side, it can help to mitigate the warming effect of greenhouse gases by reducing the amount of solar radiation that reaches the Earth's surface. This means that global dimming can help to slow down the rate of global warming.

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Answer: The correct answer is A) It stores the energy from the glucose in the bonds between the phosphate groups.

Hope this helped!!! :)

Answer:

The correct answer is It stores the energy from the glucose in the bonds between the phosphate groups. :)

Explanation:

It is true that placental mammals give birth to more fully developed offspring than marsupial mammals and therefore have a greater chance of offspring survival. This helps to explain why placental mammals from North America displaced many native South American marsupial mammals when a land bridge formed between the two continents.

Therian mammals called placental mammals have developing placentas during pregnancy. The foetus is fed by the placenta as it develops inside the mother's uterus. Mammals with placenta give birth to children that are generally mature and large. Mammals that carry babies are the majority.

Hence, placental mammals give birth to more fully developed offspring than marsupial mammals and therefore have a greater chance of offspring survival.

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An increase in the price of wheat would lead to a decrease in the supply of straw. This is because farmers would allocate fewer resources to the cultivation of other cereal crops, reducing the production of straw as a byproduct. Therefore, the correct answer is D) Supply decreases.

An increase in the price of wheat would affect the supply of straw by decreasing it. When the price of wheat rises, farmers have a greater incentive to allocate more resources towards growing wheat rather than other crops. Since straw is a byproduct of cereal crops like barley, oats, rice, rye, and wheat, an increase in the price of wheat would lead farmers to focus more on producing wheat, reducing the production of other cereal crops.

As a result, the supply of straw would decrease because farmers are allocating fewer resources to the cultivation of crops that generate straw as a byproduct. This decrease in supply would be represented by a movement down and to the left on the supply curve, as less straw would be available at each price level.

To illustrate this, consider a hypothetical scenario where the price of wheat increases. Farmers, motivated by higher profits, would shift their production towards growing more wheat. This would result in less land, labor, and resources being allocated to other cereal crops, ultimately reducing the overall production of straw. Consequently, the supply curve for straw would shift to the left, indicating a decrease in the quantity of straw supplied at each price level.

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Yes, environmental changes can have an impact on a population's allele frequencies. Natural selection, genetic drift, mutation, and gene flow are a few of the factors that might cause this.

The mechanisms that induce changes in allele frequencies over time include natural selection, genetic drift, and gene flow.

Natural selection happens when an organism is more or less fit—able to live and reproduce in a given environment—as a result of one allele (or a mix of alleles from other genes). A gene's frequency tends to decrease from one generation to the next if it has a negative impact on fitness.

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Answer:

It is a gel-like matrix composed of water, enzymes, nutrients, wastes, and gases and contains cell structures such as ribosomes, a chromosome, and plasmids. The cell envelope encases the cytoplasm and all its components. Unlike the eukaryotic (true) cells, bacteria do not have a membrane enclosed nucleus.

Explanation:

Flagella, cell wall, and pili are parts of a bacterial cell.

Microscopically small, single-celled creatures known as bacteria are found in millions in every habitat, both within and outside of other living things.

Some bacteria are hazardous, but most serve a helpful role. They are employed in industrial and medical procedures and sustain a wide variety of living forms, including both plant and animal life.

Around 4 billion years ago, bacteria are assumed to be the initial lifeforms to emerge on the planet. The earliest fossilized creatures are bacteria-like ones. Most biological and some materials can be used as food by bacteria, and certain strains can withstand harsh environments.

New insights into the functions of the gut microbiome are being provided by this expanding interest in how microorganisms affect human health. Bacteria are prokaryotes that do not contain any membrane-bound organelles.

Therefore, flagella, cell wall, and pili are parts of the bacterial cell.

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Reassortment of gene segments that encode viral surface proteins that are recognized by the immune system can result in a loss of the immune system's ability to recognize and respond to the virus. This phenomenon is called antigenic shift.

The nuclear protein that covers the influenza virus's negative sense, single-stranded RNA genome includes eight parts. The influenza virus's segmented genome allows for complete genome swaps. Antigenic shift is the phrase used to describe when a segment is switched out that encodes an influenza antigen that the host immune system recognizes as being harmful (HA or NA, for example).

The majority of seasonal and pandemic flu epidemics in people are caused by influenza A. The naming convention for influenza A virus strains includes the HA and NA types as the main surface antigens (e.g., A/Perth/16/2009 (H3N2)).When antigenic shift occurs, it is possible that an H1N1 virus and H3N2 virus may interact to produce an H1N2 virus and an H3 N1 virus.

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Answer:

exercise increase breathing rate because when we are exercise our body need more oxygen than before. It is easy to check 1. do any exercise especially cardiovascular exercise without eating anything 2. during exercise your body will suffer shortage of oxygen.  Then you will start breathing fast and deeply. By this means your breathing rate will be increase. I hope it will be help you

Answer:

Your answer is most probably A). B) implies that nuts are the only thing for birds to eat in a rainforest, which doesn't make sense, C) implies that the insects would need a widely-varied diet to survive, but again there's an abundance of things that a hungry bug can eat, so they don't need a wide dietary coverage, D) suggests that there may be droughts in the area for which the plant may need to be prepared, but in the RAINforest droughts are uncommon.

Answer:

B) birds have beaks adapted to break open hard shells

Explanation:

got it right on edge :)

Answer:

where is the statement (i will just give you some info coz i dont know what to answer <3)

Explanation:

We have rocks from the Moon (brought back), meteorites, and rocks that we know came from Mars. We can then use radioactive age dating in order to date the ages of the surfaces (when the rocks first formed, i.e. when the lava cooled and crystallized). We also have meteorites from asteroids and can date them, too.

PROTEIN  are made of amino acids.

DNA are used by organisms to store and transmit genetic information.

PROTEIN are used by organisms for tissue growth and repair.

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Answer:

The correct answer is ''the total amount of energy an animal uses in a unit of time''

Explanation:

The general metabolism or metabolic requirements can be defined as the energy demands that an organism requires for the set of biochemical reactions and physicochemical processes that occur in its cells. This set of reactions allows living beings to grow, reproduce, keep their physical structures in order and respond to external stimuli, among other things. Basal metabolism or Metabolic Rate (BMR) refers to the rate of energy expenditure (the amount of energy [expressed in kilocalories or megajoules (MJ)]) per unit of time that is spent when endothermic animals are in physical rest full. In other words, it is the amount of heat (expressed in calories) that is generated in one hour by an endothermic animal kept at rest. Also, it can be expressed as kilocalories per hour or per kilogram of weight.

Answer: The hollow collection of undifferentiated cells that occurs after fertilization and initial mitosis is called a blastocyst.

The hollow collection of undifferentiated cells that occurs after fertilization and initial mitosis is called a blastocyst. The correct option is B.

In a mammalian blastula in which some cell differentiation has occurred, A healthily developed embryo will have six to ten cells three days after fertilization.

The fertilized egg is known as a blastocyst — a rapidly dividing ball of cells — by the fifth or sixth day. The embryo will be formed by the inner group of cells. The outer group will develop into the cells that feed and protect it.

Approximately 5 or 6 days after conception, the embryo enters the uterine cavity. It is a blastocyst, or an embryo made up of around a hundred cells, at this point. A blastocyst forms in a laboratory culture system during an IVF session.

Therefore, the correct option is B. blastocyst.

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Answer:

The principles used to collect, process and analyze statistical data in Agriculture is explained below in details.

Explanation:

There are multiple techniques used to collect or receive data for statistical examination. Three of the most traditional techniques are Direct Observation • Operations and • Surveys. A review petitions data from people; e.g. Gallup surveys; pre-election surveys; marketing reviews. Field data collection facilitates us to gather important information such as the crops farmed, agronomic methods utilized by the farmer, and data on the temporary growth of crops.