which of the following statement is true regarding selective breeding ?
1. selective breeding only works in plants .
2. selective breeding only produces changes in genes .
3. selective breeding only works in animals .
4. all of the above
PLEASE HELP MEEE !!!

Answer:b

Explanation:

Answer:

X: Placental

Y: Marsupial

Explanation:

Answer:

A 7.5 mile wide asteroid slammed into the Earth and killed off more than three-quarters of the all species on the planet. There were many changes caused due to the impact. Ocean acidification likely dissolved the shells of their microscopic young ones. Fossil records also shows that the impact wiped plankton species which was their main food source.It starved the ammonites.

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Answer:

Pressure :)))))))........

The starting population, N(0), is 10 and has a growth charge, m, of 2 individuals in keeping with a unit of time, the populace is at 25 devices of time: OA.80

A discrete assemblage of entities with identifiable traits inclusive of human beings and animals with the goal of analysis and information collection is known as a population. It consists of a comparable institution of species that reside in a specific geographical region with the ability to interbreed. the full number of humans dwelling in a specific area in a selected time is referred to as the populace.

The population is one of the important factors which facilitates the balance of the environment, the populace ought to the stable with the means and resources. it can be a set of individuals, items, events, organizations, and so on. you use populations to draw conclusions. Definition 1: Population. An example of a population is the full frame of scientists in the faculty. This includes all college students observed at that school during the statistical series.

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During the rising (depolarizing) phase of an action potential, ions of the element sodium (Na⁺) enter the neuron through channels.

The rising phase of an action potential refers to the initial depolarization of the neuron's membrane, where the electrical potential inside the neuron becomes more positive. This depolarization is primarily caused by the influx of positively charged ions, specifically sodium ions (Na⁺).

At rest, the neuron's membrane maintains a negative charge inside relative to the outside. When a stimulus triggers an action potential, voltage-gated sodium channels in the neuron's membrane open, allowing sodium ions to rapidly flow into the neuron. This influx of positively charged sodium ions causes the membrane potential to shift from negative to positive, leading to depolarization.

The influx of sodium ions is responsible for the rising phase of the action potential, as it brings the membrane potential closer to the threshold for generating an action potential. This depolarizing phase is crucial for the propagation of the electrical signal along the neuron.

Once the rising phase reaches its peak and the membrane potential surpasses a certain threshold, voltage-gated potassium channels open, allowing potassium ions (K⁺) to exit the neuron. This initiates the falling (repolarizing) phase of the action potential.

In summary, during the rising (depolarizing) phase of an action potential, sodium ions (Na⁺) enter the neuron through channels, leading to the depolarization of the neuron's membrane.

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Answer:

Sea levels near the arctic rise

Explanation:

Answer:

when the sporangia dry out they break and is released to the air

CD4 cells are infection-fighting white blood cells.

White blood cells called CD4 cells also referred to as T cells, are crucial components of your immune system because they combat infection. When a person has HIV, their CD4 count is used to determine how well their immune system is functioning (human immunodeficiency virus).

HIV not only attacks CD4 cells but also makes use of them to spread the infection. HIV uses the CD4 cells' capacity for viral replication to kill CD4 cells by producing more of the virus. The CD4 cells ultimately enlarge and explode as a result of this. HIV weakens the immune system by destroying CD4 cells.

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Here's some advice;

take notes, pay attention in class, and use your textbook, if you can't find the answer look on the web, ask a friend, but never use brainly because people will say random stuff to get points.

If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of a single cell at metaphase of meiosis II would be half (0.5x) of the original amount. So, the correct option is b) 0.5x.

Meiosis is a kind of cell division that happens in the reproductive cells. It decreases the number of chromosomes in half, generating four haploid cells, each with the half number of chromosomes as the parent cell. It consists of two cycles of cell division, meiosis I and meiosis II.Meiosis I separates homologous chromosomes and produces two haploid daughter cells, whereas meiosis II divides the sister chromatids and generates four haploid daughter cells.

The DNA replication occurs during the S phase of the interphase of the cell cycle.The DNA content of a diploid cell is x, and the cell cycle involves two rounds of DNA replication; hence, it has a 2x DNA content at the beginning of meiosis. After the first meiotic division, the DNA content of each cell will be x, but each chromosome will be double-stranded (consists of two sister chromatids).

At the start of meiosis II, each cell contains x DNA content, consisting of two sister chromatids. During metaphase II, the sister chromatids of each chromosome separate, resulting in a single-stranded chromosome in each daughter cell

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The biogeochemical pathways by which the carbon content is maintained and balanced in the atmosphere and the earth is called the carbon cycle.

The pathways depict the use of the carbon compound in different activities and sources through their natural origins. The main purpose of the cycle is to balance the carbon in the ecosystem of biotic and abiotic factors.

Therefore, the carbon cycle goes on between the biotic and abiotic factors of the ecosystem.

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Answer: aneuploidy

A gain or loss in the number of chromosomes from the normal 46 is called aneuploidy. A common form of aneuploidy is trisomy, or the presence of an extra chromosome in cells. "Tri-" is Greek for "three"; people with trisomy have three copies of a particular chromosome in cells instead of the normal two copies.

The purpose of Taq polymerase in a PCR (polymerase chain reaction) reaction is to amplify a specific DNA segment by synthesizing new DNA strands complementary to the target sequence.

Taq polymerase is a DNA polymerase enzyme that was originally isolated from the bacterium Thermus aquaticus. It is widely used in PCR because of its ability to withstand the high temperatures required for denaturation of the DNA template during each PCR cycle, typically around 95°C. Taq polymerase is also highly processive, meaning it can catalyze the addition of many nucleotides to a DNA strand before it dissociates from the template.

During PCR, the Taq polymerase enzyme extends the primers that are annealed to the target DNA template in each cycle, synthesizing a new complementary DNA strand. This results in exponential amplification of the target DNA sequence, as each newly synthesized strand serves as a template for the next round of PCR. The result is a large amount of amplified DNA that can be used for various applications, such as DNA sequencing or gene expression analysis.

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Answer:

Recombinant DNA is technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. Scientists build the human insulin gene in the laboratory. Then they remove a loop of bacterial DNA known as a plasmid and insert the human insulin gene into the plasmid. Researchers return the plasmid to the bacteria and put the “recombinant” bacteria in large fermentation tanks. There, the recombinant bacteria use the gene to begin producing human insulin. Scientists harvest the insulin from the bacteria and purify the substance for use as a medicine for people.

Explanation:

The countries responsible for the climate change are the rich countries, such as the United States, Canada, Japan, and much of Western Europe.

Climate change needs for be fixed by everyone on society.

Climate change refers to long-term changes in temperature and weather patterns. Although these movements are natural, human activity has been the dominant source of climate change since the 1800s, primarily due to the combustion of fossil fuels (such as coal, oil, and gas), which emits heat-trapping gases.

Carbon dioxide (CO2), a greenhouse gas, has become a serious problem as climate change worsens. China, the United States, India, Russia, and Japan were the top five CO2-producing countries in 2020. Increasing energy efficiency is an excellent strategy to reduce pollution.

It causes power plants to use less energy, which can result in the emission of greenhouse gases. This means that you should do all possible to reduce your household's energy use.

In conclusion, rather than becoming more reliant, we must immediately cut our reliance on fossil fuels and power.

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Answer:

small intestine

Explanation:

Of the almost 10 liters of water that enter our stomach every day, 80-90% is absorbed by the small intestine. The remaining 10% (amounting to 1 liter of water) is passed on to the large intestine, which reabsorbs as much water as it can from the waste materials that are ready to be excreted out of the body as fecal matter.

Answer:

Explanation:b

Trees in hotter regions will likely not survive, and those at higher elevations will live to reproduce and pass their traits on to the next generation. This process is called as natural selection. Therefore, the correct option is A.

Natural selection refers to the process through which the populations of the living organisms adapt and change to the changing environmental conditions.

In the scenario given here, if the warming trend continues, trees in hotter regions will likely not be able to survive due to the heat stress. Over time, the surviving individuals will pass on their traits to their offspring, resulting in a population better adapted to the warmer temperatures.

Option B is less likely because adaptation to higher temperatures can take a long time. Option C is incorrect because somatic mutations are not passed on to offspring. Option D is also unlikely, as it requires a complex change in behavior, and it's not clear if the species is capable of such adaptation. Therefore, the correct option is A.

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The question is incomplete, but most probably the complete question is,

The species of quiver tree grows in a wide range of temperatures in a desert area in Africa, where average temperatures have been rising over the past several decades. The trees in the hottest parts of their range are dying, but trees at high elevations or in parts of the range that are cooler are growing and reproducing. If this warming trend continues, which of the following statements best describes how the reproduction of trees will affect future generations of the species?

A. Trees in hotter regions will likely not survive and those at higher elevations will live to reproduce and pass their traits on to the next generation

B. The trees will adapt to the higher temperatures out of need and have offspring that are better suited for hotter temperatures.

C. Mutations in the somatic cells of individual trees that allow for resistance to heat will be passed along to future offspring.

D. Trees will adapt a method of dispersing seeds to higher elevations

Microorganisms are found in nearly every environment and are said to be ubiquitous.

Microorganisms are ubiquitous or can be found in all types of micro- and macro-ecological habitats on Earth. They are able to endure harsh conditions that would kill more complicated species like mammals and humans. Some microbial taxa are more likely to be widespread because they are able to grow in or withstand a wide variety of environments. Other taxa, on the other hand, are extremely limited in their distribution and endemic because they can only survive in a very narrow range of climatic circumstances. As microorganisms, archaea and bacteria are ubiquitous because they are present in practically every ecological setting on Earth.

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There are two groups of hair cells in the organ of Corti. Stereocilia of the inner hair cells transduce pressure waves caused by vibrations of the basilar membrane into receptor potentials, while stereocilia of the outer hair cells are embedded in the overlying tectorial membrane and alter its movements to sharpen frequency tuning at each region of the basilar membrane.

The organ of Corti is an important structure located within the cochlea of the inner ear, responsible for converting sound vibrations into electrical signals that can be interpreted by the brain. It contains two main types of hair cells: inner hair cells and outer hair cells.

The stereocilia of the inner hair cells are responsible for transducing pressure waves, created by the movement of the basilar membrane in response to sound vibrations, into receptor potentials. These receptor potentials are then converted into electrical signals that are transmitted to the auditory nerve fibers, ultimately sending the auditory information to the brain for processing.

On the other hand, the stereocilia of the outer hair cells play a different role. They are embedded in the tectorial membrane, which overlies the hair cells in the organ of Corti. The outer hair cells can adjust their length and stiffness, and by doing so, they can alter the movements of the tectorial membrane. This modulation helps to amplify and sharpen the frequency tuning at each specific region of the basilar membrane, allowing for more precise discrimination of different sound frequencies.

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Answer: D. An attraction between atoms that allows them to form larger structures

Explanation:

took the lesson and it’s correct

Answer:A and D

Explanation: trust me don’t put c

In the late 1980s, a dramatic increase in the abundance of wild lake trout decimated the salmon population. The salmon population declined the most in the late 1980s. Option A is the correct answer.

In an ecosystem, there are predators and prey. If the predator population grows, they will consume more prey more quickly, causing the prey population to decline rapidly. When there are more prey in an ecosystem, it would be advantageous for the predator, and after some time, the prey will decrease in number and the predator will increase.

Salmon, mouth bass, and lake trout feed on smelt in the lake. Lake trout populations increased in the late 1980s, and as a result, they began feeding on smelt. The other two predators were also affected. The salmon population declined for some time, but later their number increased too. The mouth bass population got affected a lot, and their number kept on declining. The other two species chose different prey and multiplied.

Hence, for some time, the salmon population declined. Option A is correct.

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The period where high-risk strains of HPV integrate themselves into the host's genome without causing any symptoms for many years is most similar to the latent phase of viral infections.

During this phase, the virus is present in the host's body but does not cause any symptoms or active viral replication. This makes detection of the virus difficult, as it may not be detectable through traditional diagnostic tests. The latency period is a common feature of many viral infections, including herpes simplex virus and HIV.

In the case of HPV, integration of the viral DNA into the host's genome increases the risk of cellular changes that can lead to cancer. Detecting and treating HPV infections early is critical to preventing the development of cancer.

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Answer:

As sunlight passes through the atmosphere, particles in the air scatter blue light more efficiently than any other color in the light spectrum, creating a blue sky.

Explanation:

In this activity, you'll use the semimajor axis (A) and orbital period (P) for each planet in our solar system to verify Kepler's third law  Semimajor Axis, A Orbital Period, P is  1.3439 x 105 (days2/AU3).

The formula for Kepler's third law is P2 = kA3, where

P = time, in days

Semimajor axis, constant AU, and A

P = 687 days and A = 1.52 AU

k = P2/A3 = 6872/1.523 = 1.3439 x 105 days2/AU3 is the result.

The solution is 1.3439 x 105 (days2/AU3).

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Answer: There is a positive correlation. A longer semimajor axis corresponds to a longer orbital period.

Explanation: It's right

The correct answer is B. The process of cellular respiration uses fatty acids broken down for energy production is glycolysis.

A cytoplasmic mechanism called glycolysis converts glucose into two molecules with three carbons each and releases energy. Hexokinase, a phosphorylating enzyme, assists in the phosphorylation process that traps glucose. This reaction uses adenosine triphosphate (ATP), and the end result, glucose-6-P, inhibits hexokinase.

Since, many organism use aerobic as well anaerobic respiration pathway thus glycolysis is suitable for both for cellular respiration.

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The complete question is :

Fatty acids that are broken down for energy production are utilized for which aspects of cellular respiration? Choose all that apply.

Fermentation

Glycolysis

Pyruvate oxidation

Citric acid cycle

Electron transport chain

Answer: YES because if 2 wolfs share 1 deer than that could support the wolfs and 1 wolf only need like half to last a few days (not including cubs)

Explanation:

PLS mark brainlyist

Answer:

This is because vestigial parts are usually homologous to most of the structures that are functional in other species of organisms. E.g.. the Vestigial legs which are non functional in  whale and Dolphins, are useful to other organisms. Hence, if these organisms possessed these structures, they should share certain characteristics with  each other.Therefore these organisms can be said to evolved from one another.Thus their vestigial organism should be included by the author  as evidence of evolution.

Explanation:

True, when dna is loosely packed and found in the nucleus in long strings, it is called a chromosome.

When DNA is loosely packed and found in the nucleus in long strings, it is called chromatin. However, when the chromatin condenses and coils tightly, it forms a chromosome.

The DNA in our cells is organized into structures called chromosomes. Chromosomes are made up of DNA molecules that are wrapped around proteins called histones. When the DNA is loosely packed and found in the nucleus in long strings, it is called chromatin. The chromatin is organized into regions that are more or less tightly packed. The less tightly packed regions are called euchromatin, and the more tightly packed regions are called heterochromatin. When the chromatin condenses and coils tightly, it forms a chromosome. Chromosomes are visible under a microscope during cell division, when they become even more tightly packed.

In summary, when DNA is loosely packed and found in the nucleus in long strings, it is called chromatin. When the chromatin condenses and coils tightly, it forms a chromosome. Therefore, the statement "when DNA is loosely packed and found in the nucleus in long strings, it is called a chromosome" is false, and the correct statement is that it is called chromatin.

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