Which statement best describes cancer cells?
They grow as a single layer of cells.
They cease to reproduce after 20–50 mitotic divisions.
They reproduce only when needed to replace missing cells.
They are not regulated by contact inhibition.

Explanation:

so basically it's test a can be imrope by... you will figure it out but not by cheating

Answer: B

Explanation:

Sex linked disorders are on the X chromosome and males have only 1

It is less common in females because they have 2 X chromosomes

Answer: B

Explanation: Men only have to inherit one copy of the disorder in order to have it since they’re XY and females are XX. With females, they could get another dominate trait to prevent them from having the disorder (they would then be a carrier) but with males there’s not any way to block it out.

Answer:

c.   1 carbon, 4 hydrogen, and 2 oxygen

Explanation:

Overheating and dehydration during marathon can be prevented by wearing pre-cooling vests and drinking adequate amounts of fluids.

Dehydration is the excessive loss of water in the body. This can happen due to less intake of water, due to some disease or during heavy workouts.  During workouts the body produces heat to burn the calories and therefore to cool down the body, water is released in the form of sweat.

Pre-cooling vests are the type of vests that can be wore some time before any physical activity. In these vests, there are various pockets present where ice packs can be stored. This delays the production of excessive heat in the body and sweating. The vests can be wore during warm-up but must be removed during excessive physical activities.

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Answer:

photosynthesis occur in the chloroplasts ,cellular respiration occurs in the mitochondria

Going to school was a nice escape. I felt like I was always arguing with my brother, at home.

Answer:

Going to school was a nice escape, I felt like I was always arguing with my brother at home.

Explanation:

A comma (or a period) would fix the run-on sentence because "going to school was a nice escape" is a independent clause, as "i felt like I was always arguing with my brother at home" is as well. But being that they are connected a comma would be best

The applicant screening process would be most likely considered unfair if an HR manager shows discrimination towards certain candidates.

Also, it would be considered unfair if the HR manager does not follow standardized screening procedures or fails to consider all relevant qualifications and experience. If the HR manager applies subjective criteria during the screening process that are not directly related to job requirements or qualifications, it may lead to bias and unfairness. For example, giving preference to applicants based on personal connections or unrelated factors rather than evaluating them solely on their skills and qualifications.

Also, if the HR manager disregards or downplays the qualifications, achievements, or relevant experience of certain applicants based on personal biases or preferences, it would undermine fairness in the screening process. HR managers should conduct fair and objective screening processes to ensure equal opportunities for all applicants.

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Neurons in the hypothalamus regulate the activity of secretory cells in the anterior pituitary gland by releasing hormones. Pituitary gland basically store the hormones which is produce by the hypothalamus.

Hypothalamus connect the nervous and endocrine systems by way of the pituitary gland. Both are connected directly to the pituitary gland by a thin stalk which is called infundibulum.

Its main function is to secrete releasing hormones and inhibiting hormones that stimulate  the production of hormones in the anterior pituitary. FSH and LH both are produce and secret gonadotropins which regulated by the hypothalami releasing hormone, GnRH.  These are the releasing hormones which control the release of another hormone.

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Answer:

2N is the formula for determining diploid chromosome number

The process that begins with the replication of DNA in the nucleus of a cell is cell division, which is present in option A, and in the cell division phase, the cell divides to form daughter cells.

Cell division is a process in which the cell first grows in the G1 phase of the cell cycle, then replicates DNA in the S phase, then enters the G2 phase, and finally enters the mitosis or cell division phase. The DNA replication starts in the S phase, and in this phase, the DNA divides to form two DNA strands, so that in the division phase, each daughter cell gets parental DNA.

Hence, the process that begins with the replication of DNA in the nucleus of a cell is cell division, which is present in option A, and in the cell division phase, the cell divides to form daughter cells.

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Answer:

Cerebrum

Explanation:

It is found in the forebrain

Explanation:

an atom is the smallest chemical particle that exists

the are composed of 3 main things

protons

neutrons

electrons

protons and neutrons are located in the nucleus of the atomic structure( centre) and electrons are in shells out of the nucleus

protons are positive charged

electrons are negative charged

neutrons don't have a charge as their charge is too small and considered as nothing so 0

Vectorborne transmission of an infectious organism occurs via animals or insects.

Vectors are living organisms that can transfer an infectious disease from infected animals to humans. These species are known as arthropods. It includes mosquitoes, ticks, triatomine bugs, sandflies, etc.

There are two types of vectors; Biological and mechanical.

Biological vectors such as mosquitos transmit the disease by biting the host body. Mechanical vectors on the other hand cause infectious disease just by physical contact.

Arthropod vectors are cold-blooded. The diseases that are transmitted by them are known as vector-borne diseases. Malaria and Dengue are examples of vector-borne diseases.

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Temperature and sea ice cover are likely to be particularly important in revealing the most important features of the climate.

Firstly, it's important to understand that climate is a complex and multi-faceted topic that encompasses a range of different factors, including temperature, precipitation, wind patterns, and more. Given that the Inuit lived in Greenland, which is located in the Arctic region, it's likely that temperature and sea ice cover would be particularly important factors in characterizing the past climate.

In terms of temperature, it's important to understand not just the average temperatures throughout the year, but also the extent to which temperatures fluctuated on a daily or seasonal basis. This could help to shed light on factors such as the availability of different resources (e.g. hunting, fishing, foraging) at different times of year, as well as the strategies that the Inuit may have used to adapt to these changing conditions.

Sea ice cover is also likely to be an important factor in characterizing the past climate of the Inuit in Greenland. The extent of sea ice cover would have a significant impact on the availability of resources such as fish and marine mammals, which were likely important sources of food and other materials for the Inuit. Additionally, the thickness and stability of the sea ice could have important implications for travel and transportation, as well as for the construction of shelters and other structures.

Temperature and sea ice cover are likely to be particularly important in revealing the most important features of the climate. However, it's also important to keep in mind that there are a range of other factors that could also be important, and that a comprehensive analysis of the past environment would likely need to take all of these factors into account.

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Hello. This question is incomplete. The full question is:

A student prepared two beakers with identical sprigs of a water plant as shown below. She placed Beaker A in the shade and the Beaker B beside a fluorescent lamp. She then systematically changed the distance from the beaker to the lamp. She counted the bubbles given off by the plants in each beaker.  

If the student later tested the bubbles collected in the test tube, What would she find they are made of?

Answer:

oxygen

Explanation:

The bubbles are oxygen and we can say that because this is the gas that plants release through photosynthesis. In this case, we can also confirm that the plant that was exposed to fluorescent light, showed more bubbles than the other plant, since the light allowed the photosynthetic rate of this plant to be higher, releasing more oxygen to the environment.

Explanation:

Among the many alternatives to urban sprawl, nearly all can be placed under the umbrella of “smart growth” or “New Urbanism.” Smart growth is a management strategy designed to direct the growth of urban areas, whereas New Urbanism focuses on the physical design of communities to create livable and walkable ...

Answer:

D. Identical twins share the exact same DNA, but fraternal twins do not.

Explanation:

Identical twins are the twins formed from one egg provided by their mother and one sperm provided by their father. In contrast, fraternal twins are formed from two different sperms and two different eggs from the same father and mother.

Due to the fact that identical twins are as a result of one fertilized egg dividing into two, they share the same exact DNA. On the other hand, fraternal twins do not share the same exact DNA because they are formed from separate eggs and separate sperms.

Answer:

d

Explanation:

just took test

True. Correlations measure the relationship between two variables, and they can show the direction of the relationship (positive or negative) as well as the strength of the relationship (strong or weak). The direction of the correlation tells us whether the variables move in the same direction (positive) or opposite directions (negative), while the strength of the correlation tells us how closely the variables are related.

For example, a strong positive correlation between two variables means that as one variable increases, the other variable also increases in a linear fashion.
True/False: Correlations depict two concepts: direction and strength. Direction is the concept that determines whether the relationship is strong or weak.

Answer: False. While it is true that correlations depict two concepts, direction and strength, the statement is incorrect in saying that direction determines the relationship's strength. Direction refers to whether the relationship is positive or negative, meaning that as one variable increases, the other either increases (positive correlation) or decreases (negative correlation). Strength, on the other hand, refers to the extent of the relationship between the two variables and how closely they are associated. It does not rely on direction to determine its value.

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The prediction of the student about the amount of reactant and product is incorrect.

No, I do not agree with the student’s prediction because the amount of reactant is always equals to the amount of product. According to the Law of Conservation of Mass, mass cannot be created nor destroyed. Therefore in any chemical reaction the mass of the products must equal or same to the mass of the reactants so according to this law, the prediction of the student is incorrect.

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Answer:

The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas. The single chemical equation represents the overall process of photosynthesis.

Explanation:

The two natures of insular biotas refer to their isolation and unique ecological characteristics. Insular biotas are typically isolated from mainland ecosystems and have evolved in distinct ways due to their insularity.

Two natures of insular biotas are:

1. Isolation: Insular biotas, being located on islands or isolated areas, experience limited interaction with other ecosystems. This results in unique species compositions and adaptations due to the absence of certain external influences.

2. Endemism: Insular biotas often have high levels of endemism, meaning many species found in these ecosystems are unique to that specific location. This is a result of the isolation, which allows species to evolve independently from their mainland counterparts.

This isolation has led to the development of unique species and communities, as well as increased vulnerability to threats such as invasive species and habitat loss.

The insular nature of biotas also means they are often more sensitive to environmental changes, making conservation efforts crucial for their survival.

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Answer:

please give brainlestExplanation:

1the record of descent of an animal, showing it to be purebred.

a purebred animal.

2the recorded ancestry, especially upper-class ancestry, of a person or family.

Answer: the origin and the history of something

Explanation:

Pedigrees use a standard set of symbols to make them easier to understand. Males are represented by squares, while females are represented by circles. Parents are connected by horizontal lines, and vertical lines stemming from horizontal lines lead to the symbols for their offspring

During prophase, the chromosomes shorten and thicken. Chromosomes align in the cell's middle during metaphase. During anaphase, chromatids split apart at the centromere and go to opposing poles. After each chromosomal group's nuclear envelopes have been rebuilt, the telophase is when two nuclei are formed.

The duplicated genetic information found in a parent cell's nucleus is divided into two identical daughter cells during the fourth stage of mitosis, referred to as anaphase.

During telophase, the chromosomes begin to decondense, the spindle disintegrates, and the nuclear membranes and nucleoli reorganize. Each of the two daughter cells produced by the mother cell's cytoplasm splitting contains the same amount and kind of chromosomes.

Various chromosomes are frequently scattered all across the cell nucleus. While the cell's nucleus disintegrates during metaphase, the chromosomes of the cell condense and move near one another, aligning in the middle of the dividing cell.

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It is accurate to say that "organisms must consume and digest food in order to make energy" because food is required to maintain basic bodily processes including growth, locomotion, and reproduction.

Because food serves as their bodies' principal source of fuel, organisms must ingest and digest food in order to produce energy. Food comprises a variety of compounds that can be broken down and used by the organism's cells to create an energy source called adenosine triphosphate, including proteins, lipids, and carbohydrates (ATP).

The cells of the organism use a process known as cellular respiration to transform the chemical energy present in food into a form that may be used to fuel cellular activities.

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The nonspecific immune response that is characterized by heat, redness, swelling and pain is the first line of defense that prevents pathogens from entering the body.

The inflammatory process leads the body to produce five classic signs:

Heat and flushing are caused by the dilation of the vessels and the increase in local blood flow leads to a reddish color.

With this information, we can conclude that the nonspecific immune response that is characterized by heat, redness, swelling and pain is the first line of defense that prevents pathogens from entering the body.

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Answer:

Binary fission

1. Forms two daughter individuals

2. Divides only once

3. No residue is left

4. Takes place in favourable conditions

5. Immortality is present

Example: Amoeba reproduces by binary fission

Multiple fission

1. Forms many daughter individuals

2. Divides repeatedly

3. Residue is left

4. Takes place in favourable as well as unfavourable conditions

5. Immortality is absent

Example: Plasmodium reproduces through multiple fission

The hypothalamic control of growth hormone (gh) release different from the control of tsh and acth while all three hormones are regulated by the hypothalamus and pituitary gland, the specific mechanisms of control differ depending on the hormone.

The hypothalamic control of growth hormone (GH) release differs from the control of thyroid-stimulating hormone (TSH) and adrenocorticotropic hormone (ACTH) in several ways. Firstly, GH release is primarily regulated by the hypothalamic hormone, growth hormone-releasing hormone (GHRH), which stimulates the pituitary gland to release GH. In contrast, TSH and ACTH release are primarily regulated by hypothalamic hormones, thyrotropin-releasing hormone (TRH) and corticotropin-releasing hormone (CRH), respectively.

Secondly, GH release is also inhibited by the hypothalamic hormone, somatostatin, which suppresses the release of GH from the pituitary gland. In contrast, TSH and ACTH release are not directly inhibited by hypothalamic hormones, although negative feedback mechanisms exist to regulate their release.

Finally, the control of GH release is also influenced by other factors, such as sleep, exercise, and stress, which can modulate the release of GHRH and somatostatin. In contrast, the control of TSH and ACTH release is primarily regulated by negative feedback from the target organs (thyroid gland and adrenal glands) that these hormones act upon.

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The correct formula for a compound of aluminum and fluorine in the periodic table is AlF3. Option 2 is the answer.

The modern periodic table consists of 118 elements, organized into rows (called periods) and columns (called groups) based on their electron configurations and chemical properties. The elements are arranged such that elements with similar properties are located in the same column, while elements in the same row have the same number of electron shells.

Aluminum has three valence electrons and can lose them to form a 3+ cation, while fluorine has seven valence electrons and can gain one electron to form a 1- anion.

In order to form a neutral compound, three fluoride ions (F-) are needed to balance the charge of one aluminum ion (Al3+). Therefore, the correct formula is AlF3.

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After mammalian cells are transfected with plasmid DNA,  the expression of the genes encoded by the plasmid DNA in the transfected cells is seen.

This can be confirmed through various assays, such as western blotting or fluorescent microscopy, which detect the presence and localization of the protein product of the transfected gene. The success of transfection can also be monitored by measuring the efficiency of transfection and the level of gene expression achieved.

Additionally, the transfected plasmid DNA may integrate into the genome of the mammalian cells, leading to stable expression of the transfected gene.

The specific outcome of plasmid transfection depends on several factors, including the type of cells used, the properties of the plasmid DNA, and the transfection method used.

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