PLS FAST "Can stem cells cure diseases"ESSAY
**100 POINTS**

Answer:

Mary's genotype must be IAi while John's must be IBi. When the gametes met up at each conception, Joan got ii, James got IAi, and Pete got IBi.

Explanation:

Answer:

true

Explanation:

because to domesticate animals we just picked the ones we wanted

In this question, we combine blood cells with their associations which are erythrocytes, leukocytes, platelets.

Also called red or aromatic blood cells, have great flexibility, shape and form of a biconite disk, that is, they have thinner centers and thicker edges.

Are also called white blood cells as cells that act in defense of our body, working to fight allergies and infections.

Are cells that are made in the bone marrow and circulate in the bloodstream and help the blood to clot.

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The event that has been responsible for the most extinctions in the history of life on Earth is likely rapid changes in climate. Option c is correct.

Throughout Earth's history, there have been numerous instances of dramatic climate change, often associated with shifts in ocean circulation patterns, volcanic activity, or other factors. These shifts have led to periods of mass extinction, during which large numbers of species go extinct in a relatively short period of time.

One of the most famous examples is the extinction of the dinosaurs, which was likely caused by a combination of asteroid impact and subsequent climate change. However, other mass extinctions have been associated with purely environmental factors, such as changes in atmospheric composition, sea level, or temperature. Option c is correct.

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A model that uses DNA comparisons to see how long two different organisms have been evolving independently from each other is referred to as molecular clock. It makes use of a genetic material that go through mutation. This is used to calculate the time of evolution between two different organisms.

A phylogenetic tree is also called as evolutionary tree. It is a diagram used to illustrate the lines of evolutionary descent of various species from a common ancestor. A cladogram is is a diagram that illustrate the relationships of various froups of taxa.

Answer - A. molecular clock hypothesis

Both energy and nutrients move through the organisms at each trophic level of the ecosystem

Energy that is lost at each trophic level of an ecosystem is replenished by sunlight. Besides energy, nutrients move through the organisms at each trophic level of the ecosystem.What is a trophic level?A trophic level is a classification of organisms that feed on the same type of food and occupy the same position in a food chain. Producers, primary consumers, secondary consumers, and tertiary consumers are the four trophic levels in most food chains.The sunlight, which is converted into usable energy by photosynthesis, powers the entire food chain. As the energy moves up the food chain, it is gradually lost. Organisms at higher trophic levels require more energy and hence consume more organisms to survive.Nutrients, on the other hand, are transferred from one trophic level to the next through the consumption of other organisms. These nutrients include carbon, nitrogen, oxygen, and other elements that are necessary for living organisms to grow and survive. The energy is replenished by sunlight, while the nutrients are transferred from one level to the next through the consumption of other organisms.

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Answer:

The results from the following base mutations --- substitution, insertion, and deletion are :

Explanation:

What is base substitution :

What is base insertion:

What is base deletion :

What are the effects of base mutations:

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About 90% of the water in the atmosphere is produced from evaporation crom water bodys, while the remaining 10% comes from transpiration. These are the form of return of the water to the atmosphere in the water cycle. The rainfall is related to the process of precipitation of the water cycle, being know a the return of water to the Earth.

Therefore, for the information about the water cycle and how it work, the alternative is false because according to the known about the water cycle, rainfall is not direct linked to the return of water to the air, but to the return of water to the Earth.

Because plants have more offspring than animals, plant breeders do not use pedigree charts.

A pedigree chart is  a graphic representation of an organism's (an animal's) phenotypes and genotypes in relation to their ancestors. this is employed to investigate how genes are passed down through species, enabling geneticists to ascertain if a trait is recessive or dominant.

Because plants have more offspring than animals do and it will be challenging to trace each offspring back to its ancestor, plant breeders will find it tough to use the pedigree chart.

Since plants have more offspring than animals do, it follows that plant breeders do not employ pedigree charts.

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The question is incomplete, the complete question is shown in the image attached

Answer:

F

Explanation:

The image shows a food web. A food web shows all the possible feeding relationships in an ecosystem.

We have to know that the concentration of chemical pollutants increases in organisms as you move up the food web. Higher level organisms tend to accumulate a greater concentration of chemical pollutants than the organisms that are lower in the food web.

Thus, the organism which appears at the highest level of the food web shown in the image will most likely have accumulated the largest concentration of long lasting chemical pollutants in their bodies.

Answer:

F. Gulls

Explanation:

Gulls, or colloquially seagulls, are seabirds of the family Laridae in the suborder Lari. ... Most gulls are ground-nesting carnivores that take live food or scavenge opportunistically, particularly the Larus species. Live food often includes crustaceans, mollusks, fish, and small birds.

Chemical composition of dorsal spines provides information about its function as regulation of body temperature.

The dorsal spines were not used to support a hump or to regulate body  temperature because of the chemical composition of the spines. Ibrahim found that the spines were made up of bones having few blood vessels and were likely wrapped tightly in skin which can't perform the function of thermoregulation in the body.

In order to regulate temperature of the body, more blood vessels are needed and we know that in dorsal spines the structure is bony and less number of blood vessels so we can conclude that chemical composition of dorsal spines provides information about its function as regulation of body temperature.

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Thesis: Direct evidence, including kill sites and butchery sites, along with additional supporting factors, strongly support the involvement of Homo sapiens in the mass extinction of Holocene megafauna, aligning with the overkill hypothesis.

Kill sites as direct evidence

Kill sites such as Warratyi rock shelter and La Brea Tar Pits reveal concentrated deposits of megafauna remains alongside stone tools, directly linking Homo sapiens to their extinction.

Butchery sites as direct evidence

Butchery sites like Mammoth Site and Kostenki-Borshevo exhibit clear signs of human butchery on megafauna remains, such as cut marks and bone breakage patterns, providing direct evidence of human hunting and processing.

The correlation between the arrival of Homo sapiens and the decline of megafauna, coupled with population expansion and advanced hunting technologies, supports the overkill hypothesis. Climate change alone cannot explain the magnitude and timing of extinctions.

Direct evidence from kill and butchery sites, along with supporting factors, strongly indicate Homo sapiens' role in the mass extinction of Holocene megafauna. The association of stone tools with megafauna remains, presence of butchery signs, and the correlation between human arrival and extinctions provide compelling evidence for human-driven overhunting as a primary cause.

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Answer:

d

Explanation:

Answer:

I am sure the answer is d

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Hello there

Answer: air pressure drops

Explanation: As altitude rises the air pressure drops.

Answer:from left to right, 1.anaphase 2.prophase 3. Telophase 4. Metaphase

Explanation:

DNA is important in identifying genetic relationships within a group, but it alone is not sufficient to determine complex social constructs like race, whiteness, or property; the inclusion of social, cultural, and historical factors is crucial in understanding these concepts.

Biological anthropologists and genome scientists should consider the relationship between Europeans and Indigenous people in their research to provide a more comprehensive understanding of human genetic diversity and population history.

DNA analysis can provide valuable insights into genetic relationships within a group, such as determining genetic ancestry or identifying related individuals. However, race, whiteness, and property are social constructs that go beyond genetic factors and are shaped by historical, cultural, and socioeconomic factors. These concepts are complex and cannot be solely explained by genetic data. Therefore, it is important for researchers, including biological anthropologists and genome scientists, to recognize the limitations of genetic data and consider the broader social context when studying race, whiteness, and property.

In the context of researching Europeans and Indigenous people, it is crucial for researchers to acknowledge and incorporate the historical and ongoing relationships between these groups. This includes understanding colonization, displacement, and the impact of power dynamics on genetic diversity and health outcomes. By including this relationship in their research, scientists can contribute to a more accurate and nuanced understanding of human genetics and promote social and scientific equity.

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The myenteric plexus is a network of nerve fibers and ganglia located between the muscle layers of the gastrointestinal tract. It regulates gastrointestinal motility and coordinates peristalsis, the movement of food through the digestive system.

The myenteric plexus, also known as Auerbach's plexus, is a network of nerve fibers and ganglia located between the circular and longitudinal muscle layers of the muscularis externa in the gastrointestinal tract. It is part of the enteric nervous system, which controls the functions of the digestive system.

The myenteric plexus plays a crucial role in regulating gastrointestinal motility, including the contraction and relaxation of the smooth muscles in the digestive tract. It coordinates peristalsis, the wave-like movement that propels food through the digestive system.

Dysfunction of the myenteric plexus can lead to gastrointestinal disorders such as irritable bowel syndrome and intestinal pseudo-obstruction.

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The myenteric plexus is a term used to describe a specific part of the enteric nervous system, which is the network of nerves found in the walls of the gastrointestinal tract. It is also known as the Auerbach's plexus.

The myenteric plexus is primarily responsible for controlling the motility of the gastrointestinal tract. It is located between the longitudinal and circular muscle layers of the muscularis externa, which is the muscle layer responsible for the movement of food along the digestive system.

The myenteric plexus consists of a complex network of nerve fibers, ganglia (clusters of nerve cell bodies), and interconnecting neurons. It receives information from sensory neurons located in the gut, processes that information, and then sends signals to regulate the contractions of the smooth muscles in the gastrointestinal tract. These contractions are essential for moving food through the digestive system during processes like peristalsis.

In summary, the myenteric plexus is a crucial component of the enteric nervous system, located between the muscle layers of the gastrointestinal tract. Its main function is to regulate and coordinate the movements of the digestive system, ensuring the proper propulsion and mixing of food along the digestive tract.

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1. **Order for Photosynthesis:** Photosynthesis is a complex process that requires several inputs for it to occur. Chlorophyll in the plant's leaves absorbs sunlight, which is then converted into energy. Water is taken up by the roots and transported to the leaves where it is used to create energy. Carbon dioxide is absorbed from the air and combined with the energy from sunlight and water to produce glucose, a type of sugar that is used as food by the plant.

2. **Outputs for Human Survival:** Plants play a crucial role in human survival, providing us with a variety of essential outputs. One of the most important outputs is oxygen. During photosynthesis, plants release oxygen into the air as a waste product. This oxygen is then breathed in by humans and other animals, allowing us to survive. In addition to oxygen, plants also produce a variety of foods that are essential for human survival, such as fruits, vegetables, and grains. These foods provide us with the nutrients we need to stay healthy, and they also form the basis of many of our diets.

3. **Chemosynthesis vs. Photosynthesis:** While photosynthetic producers are the most common type of producers, there are other organisms that carry out a similar process called chemosynthesis. Chemosynthetic producers are bacteria that use chemicals instead of sunlight to produce food. They are typically found in extreme environments, such as deep sea vents, where there is no sunlight available. Because they do not rely on sunlight, they can survive in areas where photosynthetic producers cannot. However, chemosynthetic producers are not a good food source for humans because they produce organic compounds that are not digestible by humans. Photosynthetic producers, on the other hand, are able to produce food that is digestible by humans and other animals, making them a more valuable food source for us.

Answer:

Explanation:

If we want to grow plants on another planet, we will need to provide them with the necessary conditions for photosynthesis to occur. This includes providing them with an adequate amount of light, water, and nutrients, as well as ensuring that the temperature and atmospheric conditions are suitable for their growth. If any of these conditions are not met, the plants may not be able to carry out photosynthesis effectively, which could impact their growth and survival.

Plants are a crucial source of food, oxygen, and other resources needed for human survival. They produce oxygen through photosynthesis, which is essential for human respiration. They also provide food in the form of fruits, vegetables, grains, and other plant-based products, which contain essential nutrients such as carbohydrates, proteins, vitamins, and minerals that are needed for human health. Additionally, plants play a crucial role in maintaining the Earth's ecosystem by regulating the carbon cycle and providing habitats for other organisms.

Producers that carry out chemosynthesis differ from photosynthetic producers in that they do not rely on light energy to produce organic compounds. Instead, they use energy from chemical reactions to convert inorganic compounds into organic compounds. Chemosynthetic producers are often found in extreme environments such as deep-sea hydrothermal vents or acidic soils, where the conditions are not suitable for photosynthesis. As a possible food source, chemosynthetic producers may have different nutritional profiles compared to photosynthetic producers, as they may contain different types and amounts of organic compounds. However, their potential as a food source for humans would depend on their availability and the feasibility of cultivating them for human consumption.

Elephants' ability to work together can be considered as an innate behavior. These magnificent animals have a strong social structure that is deeply ingrained in their nature.

They have evolved to live in tight-knit family groups, and they have developed communication skills that allow them to work together to achieve common goals. In addition to that, elephants also have an exceptional memory that allows them to remember complex social relationships and navigate complex environments. So, to sum it up in a long answer, the ability of elephants to work together is an example of an innate behavior that has been honed over thousands of years of evolution.

The ability of elephants to work together is a combination of both innate behavior and learned behavior. Innate behavior refers to actions that are instinctual and do not require learning, while learned behavior is acquired through experience and observation. Elephants have a natural tendency to form social bonds and cooperate, which is an innate behavior. However, specific techniques and strategies for working together are often learned from other members of their social group.

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Answer:

I think its A.

Explanation:

In the primary purpose inquiries, the author's possible motivations for writing the text are sought. It's a good idea to keep asking yourself "So what?" while reading the chapter passage for the first time.

What is the goal? A writer's motivation for writing is their goal or objective. An author may wish to make light of a situation, educate, persuade, or the entertain the reader. An author may wish to educate, entertain, persuade, or mock a passage condition. Early on, the reader is made aware that the author is malnourished and the overworked, and that a selection is about to be presented.

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DNA replication is the process through which DNA duplicates. It occurs in the interphase and involves different enzymes, DNA molecules, and free nucleotides. Terms and definitions in the attached files.

DNA replication is the process through which DNI molecule duplicates. This event takes place during the S stage of the interphase. So when the cell divides during mitosis or meiosis, each cell will get a complete set of chromosomes.

DNI replication is semi-conservative because each new molecule carries an original DNI strand and a new one. The fact that the new molecule is composed of an original strand makes it semi-conservative. The old existing strands are used to synthesize the new complementary strand.

The origin of the replication requires helicase enzymes to break hydrogen bonds and separate the two original strands. The topoisomerase enzyme is necessary to release tension. Other proteins are also needed to join the strains and keep them separated. Once the molecule is opened, there is a region named replication forks. DNA polymerase makes the new nucleotides enter into the fork and pairs them with the corresponding nucleotide of the original strand. Adenine pairs timine, and cytosine pairs guanine.

DNA strands are antiparallel, and replication occurs only in 5'-3' direction. So one of the strands will replicate continuously, while the other strain will be formed by short fragments known as Okazaki fragments.

Primers are needed to make the DNA polymerase work. Primers are small units of RNA and are placed at the beginning of each new fragment.

In the attached files you will find the terms and their definitions.

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Answer:

Acetone

Explanation:

Answer: Acetone.

Explanation: Acetone molecules have a polar carbonyl group that allows them to ACCEPT hydrogen bonds from OTHER compounds. The slightly positive charge on each hydrogen can attract slightly negative oxygen atoms on other water molecules, forming hydrogen bonds. If acetone is added to water, acetone would completely dissolve.

Answer:

sequences of nitrogenous bases in the cell's DNA