help me !!!! please

Based on the DNA sequence, the species that is most closely related to the unknown species is species 1, as it has more homologies than species 2. A bigger distance can be traduced in a higher number of mutations or modifications in the DNA sequence.

The correct answer is: Species 1.

The source of RNA used to construct a cDNA library depends on the specific research question and available resources. Isolating mRNA from cells or tissues is the most common method used, as it allows for a comprehensive analysis of gene expression.

The source of the RNA used to construct a cDNA library typically comes from mRNA isolated from cells or tissues. This is because mRNA contains the coding regions of genes, making it an ideal starting material for creating a cDNA library.

The mRNA is extracted from the cells or tissues using various methods, including column chromatography or magnetic bead selection. Once isolated, the mRNA is converted into cDNA using reverse transcriptase, an enzyme that synthesizes DNA using mRNA as a template.

Alternatively, mRNA can also be chemically synthesized from database sequences. This approach can be useful when a specific gene of interest is not expressed in the cell or tissue sample being used. By synthesizing the mRNA sequence, researchers can ensure that the cDNA library includes the desired gene. However, this method can be expensive and time-consuming.

Another approach is to isolate mRNA using a restriction digest. This involves digesting total RNA with a restriction enzyme that cuts at specific recognition sites within the RNA sequence. The resulting fragments are then selected for size and used to create a cDNA library. While this method can be useful, it may not capture all of the expressed genes, as not all mRNA may contain the specific restriction sites used for digestion.

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Weathering whereas gravestones made of silicates weathers much faster.​

Weathering is the process of breaking down of rocks and minerals due to its continuous contact with water, gases or some living organism. There are three types of weathering:  physical, chemical and biological. Weathering is the reason for the formation of various landforms on the Earth.

Silicates are the type of minerals that are polyatomic anions and are composed of silicon and oxygen in tetrahedral SiO₄⁴⁻ units. The example of silicates are: quartz, feldspar, mica, amphibole, etc. Silicates are the ones to weather most easily and amongst all silicates, olivine is the one that weather most quickly.

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I think that would be B:  Prairie dogs are an important source of food for many other species.

hope this helps. and please correct me if I'm wrong ^^

Explanation:

2 , 3 and 4 only because they the first ones to eat

The main producers are found at the bottom of the food chain. Autotrophs, or primary producers, are often photosynthetic organisms like plants, algae, or cyanobacteria. The organisms that eat primary producers are known as primary consumers. Thus, option C is correct.

Herbivores devour most of the food. Grazers consume plants, algae, and other food sources. The second trophic level is where they are. Deer, mice, and even elephants are herbivores in a grassland ecology.

The second trophic level consists of primary consumers. Herbivores are another name for them. Only primary producers like plants or algae are eaten by them. A grasshopper living in the Everglades is an illustration of a primary consumer.

Therefore, 2, 3, and 4 only of the organisms in the food web could be referred to as primary consumers.

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Answer: Water influences the intensity of climate. It is the energy contained in the water cycle that creates major storms like hurricanes and typhoons. More the water is present in an area, the more water is evaporated. The distribution of solar energy through the water cycle creates winds and weather patterns.

The main function of the kidney was to release the waste into blood stream.

define kidney ?

In vertebrates, the kidneys are two reddish-brown bean-shaped organs. They are located on the left and right sides of the retroperitoneal space and are about 12 centimetres (4+12 inches) long in adults. They get blood from the linked renal arteries and get blod from the paired renal veins. Each kidney is connected to a ureter, which is a tube that transports expelled pee to the bladder.

The kidney regulates the amount of various bodily fluids, fluid osmolality, acid-base balance, electrolyte concentrations, and toxin elimination. Filtration takes place in the glomerulus, where one-fifth of the blood volume entering the kidneys is filtered. Reabsorbed substances include solute-free water, salt, bicarbonate, glucose, and amino acids.

so the main role of kidneys was to eliminate the waste from the body through the urine.

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Answer:

Sidney W. Fox.

Explanation:

Fox went on to create microspheres that he said closely resembled bacterial cells and concluded that they could be similar to the earliest forms of life or protocells. Hope this helped :)

These are the 9 main life processes of an animal and how hydra accomplish each of them:

Respiration: Hydras respire through their skin. The skin is thin and allows oxygen to diffuse into the body. Carbon dioxide diffuses out of the body in the same way.

Nutrition: Hydras are carnivores and feed on small animals, such as plankton and insects. They capture their prey with their tentacles and inject it with a paralyzing venom. The venom paralyzes the prey and makes it easier for the hydra to digest.

Excretion: Hydras excrete waste products through their skin. The waste products diffuse out of the body in the same way that oxygen diffuses in.

Sensitivity: Hydras are sensitive to touch, light, and chemicals. They use these senses to find food, avoid predators, and reproduce.

Movement: Hydras can move by contracting their body. They can also move by extending their tentacles.

Growth: Hydras grow by cell division. The cells at the tip of the body divide and create new cells. These new cells are added to the body of the hydra, making it grow longer.

Reproduction: Hydras can reproduce sexually or asexually. Sexual reproduction involves the fusion of two gametes, each from a different hydra. Asexual reproduction involves the budding of a new hydra from the body of an existing hydra.

Development: Hydras develop from a fertilized egg. The egg divides into two cells, then four cells, and so on. The cells eventually form a blastula, which is a ball of cells. The blastula then forms a gastrula, which is a cup-shaped organism with two layers of cells. The gastrula eventually develops into a hydra.

Death: Hydras can die from a variety of causes, including starvation, predation, and disease.

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The 4th to 8th weeks constitute a critical period of human development is (E) the gastrulation during the latter part of the first trimester is very sensitive to disruptions by ingested substances, teratogens.

During the first few weeks of human development, the zygote undergoes rapid cell division and differentiation. However, it is during the latter part of the first trimester, specifically during gastrulation, that the embryo is particularly vulnerable to teratogens - substances that can cause birth defects or developmental abnormalities.

Gastrulation is the process by which the embryo forms the three primary germ layers - the ectoderm, mesoderm, and endoderm - which give rise to all of the body's tissues and organs.

Exposure to teratogens during gastrulation can disrupt the normal development of the embryo, leading to a range of congenital malformations such as neural tube defects, heart defects, limb abnormalities, and cleft lip and palate.

Therefore, it is important for pregnant women to avoid exposure to teratogens, such as alcohol, tobacco, certain medications, and environmental toxins, during this critical period of development. The correct answer is E.

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Answer:

No

Explanation: The chromosomes are always inherited as complete unites

Hope this helps

Answer:

An observer in space will see that Earth requires 23 hours, 56 minutes, and 4 seconds to make one complete rotation on its axis. But because Earth moves around the Sun at the same time that it is rotating, the planet must turn just a little bit more to reach the same place relative to the Sun.

Answer:

Yes, but actually no.

Explanation:

Since gravity pulls inward from all directions equally, a clump, if big enough, will eventually become a round planet. Inertia then keeps that planet spinning on its axis unless something occurs to disturb it.

To simplify, due to gravity, things will keep spinning until something stops it from spinning (this applies to being in space, I think).

Answer:

The answer is side chain/group.

Answer:

d

Explanation:

The two main conclusions of the Human Genome Project are that: a) The human genome includes roughly three billion base pairs and b) The human genome contains roughly 25,000 genes.

The first sequence of the mortal genome and the genomes of several other considerably delved organisms were created through the Human Genome Project, an expansive, well- planned, and largely cooperative worldwide bearing. It was one of the largest and most significant scientific systems ever accepted, lasting from 1990 to 2003.

The initial objectives of the Human Genome Project, which included sequencing the whole human genome as well as the genomes of a few carefully chosen non-human creatures, were set forth by a special committee of the U.S. National Academy of Sciences in 1988.

E. coli, baker's yeast, fruit flies, nematodes, and mice eventually made the list of organisms. The creators of the initiative and those who took part in it anticipated that the data it produced would usher in a new age for biomedical research.

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Correct question:

Most scientists consider the Human Genome Project (HGP) to be the most significant scientific project of the 21st century. From the list below, choose the statements that describe the key findings of the Human Genome Project.

a) There are approximately three billion base pairs in the human genome.

b) The human genome contains approximately 25,000 genes.

c) There are 23 pairs of chromosomes that make up the human genome.

d) The genetic information of a cell is stored in the form of DNA.

e) DNA exists in a double helical form.

The process of cell division replaces damaged cells by splitting them into two new cells with identical genetic makeup. This ensures that the genetic material is passed on to the new cells, allowing for the growth, development, and repair of tissues and organs in the body.

During cell division, the genetic material, organized in chromosomes, is replicated and distributed equally to the two new daughter cells. This ensures that each new cell receives a complete set of genetic instructions necessary for its proper functioning.

The process of cell division, called mitosis, plays a crucial role in the maintenance and renewal of tissues, allowing damaged or old cells to be replaced with healthy new cells.

By undergoing cell division, damaged cells can be replaced with healthy ones, contributing to tissue repair and overall maintenance of the organism's health and functionality.

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Answer:

Convergant Boundaries.

If you didn't understand the first answer

Explanation:

I just took the AP3X quiz.

Answer: Place each oil stain on separate, but identical, pieces of cloth.

The group of students should have stained separate but identical pieces of cloth.

There are different factors that influence how easily a stain will come out of a material such as:

Assuming the temperature is held constant and the type of detergent is being tested, the only thing other thing to control is the type of material.

The students used separate cloths instead of identical ones which meant that a significant variable was not controlled.

In conclusion, the students should use separate but identical pieces of cloth so that the type of material would not impart their experiment.

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Answer:

D more aquatic life

Explanation:

Answer:

look at explanation

Explanation:

Antibotics don't work against viruses because they only work on bacterial infections. These bacterial infections are very much difgferent than viruses, like c o v i d, the flu, or the common cold.

Answer:The duck has webbed feet that help it swim in water. The moose has feet with hooves that help it walk on hard ground.

Explanation:

If H1 is selectively extracted from compacted chromatin, it is likely that the overall structure of the chromatin would become less condensed and more open, potentially allowing for increased accessibility of DNA-binding proteins and transcription factors.

Histone H1 is an important structural component of chromatin that helps to stabilize and condense DNA into higher-order structures, such as 30 nm fibers. This could result in changes to gene expression and chromatin remodeling, which could have downstream effects on cellular processes and function. Additionally, the loss of H1 could also affect the stability and integrity of the chromatin structure, potentially leading to DNA damage or genome instability.

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Answer:

Personality disorders are a group of mental health conditions that are characterized by inflexible and atypical patterns of thinking, feeling, and behaving. These inner experiences and behaviors often differ from the expectations of the culture in which someone lives.

Explanation:

If two of the heterozygous red fruits were mated genotypic ratio is 1:1 and phenotypic ratio is 1:2:1for given genes .

The functional and physical unit of heredity handed down from parent to child. Genes are pieces of DNA that contain the instructions for producing a particular protein.

The genotypic ratio is a ratio that depicts the various genotypes of progeny from a test cross. It depicts the pattern of offspring distribution based on genotype, which is the genetic constitution that determines an organism's phenotype.

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True. The analysis of variance (ANOVA) assumes that the variances of the groups being compared are homogeneous (equal). If the variances are not equal, it can affect the accuracy of the results.

The statement "Analysis of  assumes homogeneous variances" is true. In the context of the analysis of variance (ANOVA), homogeneous variance refers to the assumption that the variances among the different groups being compared are equal. This assumption is essential for obtaining accurate results from the ANOVA test.

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Answer:

I think c

Explanation:

I hope your help

The energy released by the electron transport chain is used to pump hydrogen ions (H+) into the intermembrane space of the mitochondria in eukaryotic cells.

Electron transport chains (ETCs) are present in the inner mitochondrial membrane of eukaryotic cells. They are redox-driven mechanisms that facilitate the transfer of electrons from reduced electron carriers to oxygen, forming water and generating a proton-motive force used for ATP synthesis. The movement of electrons through the electron transport chain leads to the pumping of protons (H+) out of the mitochondrial matrix and into the intermembrane space. As more and more protons accumulate in the intermembrane space, the concentration gradient builds up, resulting in the generation of a proton-motive force. This electrochemical gradient can then be used to drive ATP synthesis by ATP synthase, which is located in the inner mitochondrial membrane.

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Answer: Epipelagic

Explanation:

Some fish, including striped bass, eat some of the same types of food as the blue crab. These fish are often found in the well-lit layer of the ocean around 200m deep and above. What is this zone called? Epipelagic.