1. Josie was given a set of cards that identify the hierarchical organization of organisms. She orders the cards from least complex to most complex. Which shows the cards in the correct order?

Answer:

Scientific Theory

Explanation:

The statement "the characteristics of living things change over time" refers to the concept of biological evolution, which is widely accepted as a scientific theory in the field of biology. In scientific terms, a theory is a well-substantiated explanation of a natural phenomenon that is supported by extensive evidence, experimentation, and scientific consensus. The theory of evolution, proposed by Charles Darwin and further developed over time, provides a comprehensive explanation for the diversity and change in the characteristics of living organisms. It is supported by a vast body of evidence from various scientific disciplines, including genetics, paleontology, comparative anatomy, and molecular biology.

In contrast, scientific laws describe observable patterns or regularities in nature that are often expressed as mathematical equations or principles. Laws, such as Newton's laws of motion or the laws of thermodynamics, describe specific relationships or behaviors in the physical world.

Therefore, the statement about the characteristics of living things changing over time aligns with the theory of evolution, rather than being described by a scientific law.

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Why do we sleep?

A lot is still unknown about the purpose of sleep. However, it’s widely accepted that there isn’t just one explanation for why we need to sleep. It’s likely necessary for many biological reasons.

To date, scientists have found that sleep helps the body in several ways. The most prominent theoriesTrusted Source and reasons are outlined below.

Energy conservation

According to the energy conservation theory, we need sleep to conserve energy. Sleeping allows us to reduce our caloric needs by spending part of our time functioning at a lower metabolism.

This concept is backed by the way our metabolic rate drops during sleep. Research suggests that 8 hours of sleep for human beings can produce a daily energy savings of 35 percentTrusted Source over complete wakefulness.

The energy conservation theory of sleep suggests that a main purpose of sleep is to reduce a person’s energy use during times of the day and night, when it’s inconvenient and less efficient to hunt for food.

Sleep is essential for good health. In fact, we need sleep to survive — just like we need food and water. So, it’s no wonder we spend about one-third of our lives sleeping.

Many biological processes happen during sleep:

The brain stores new information and gets rid of toxic waste.

Nerve cells communicate and reorganize, which supports healthy brain function.

The body repairs cells, restores energy, and releases molecules like hormones and proteins.

These processes are critical for our overall health. Without them, our bodies can’t function correctly.

Let’s take a closer look at why we sleep, along with what happens if we don’t get enough.

Emotional well-being

Similarly, sleep is necessary for emotional health. During sleep, brain activity increases in areas that regulate emotion, thereby supporting healthy brain function and emotional stability.

Areas of the brain in which sleep increases activity include:

amygdala

striatum

hippocampus

insula

medial prefrontal cortex

One example of how sleep can help regulate emotion occurs in the amygdala. This part of the brain, located in the temporal lobe, is in charge of the fear response. It’s what controls your reaction when you face a perceived threat, like a stressful situation.

When you get enough sleep, the amygdala can respond in a more adaptive way. But if you’re sleep-deprived, the amygdala is more likely to overreact.

Research shows that sleep and mental health are intertwined. On the one hand, sleep disturbances can contribute to the onset and progression of mental health issues, but on the other hand, mental health issues can also contribute to sleep disturbances.

Weight maintenance

Sleep affects your weight by controlling hunger hormones. These hormones include ghrelin, which increases appetite, and leptin, which increases the feeling of being full after eating.

During sleep, ghrelin decreases because you’re using less energy than when you’re awake.

Lack of sleep, however, elevates ghrelin and suppresses leptin. This imbalance makes you hungrier, which may increase the risk of eating more calories and gaining weight.

Recent research shows that chro

Cellular restoration

Another theory, called the restorative theory, says the body needs sleep to restore itself.

The idea is that sleep allows cells to repair and regrow. This is supported by many important processes that happen during sleep, including:

muscle repair

protein synthesis

tissue growth

hormone release

Brain function

The brain plasticity theory says sleep is required for brain function. Specifically, it allows your neurons, or nerve cells, to reorganize.

When you sleep, your brain’s glymphatic (waste clearance) system clears out waste from the central nervous system. It removes toxic byproducts from your brain, which build up throughout the day. This allows your brain to work well when you wake up.

Research suggests that sleep contributes to memory function by converting short-term memories into long-term memories, as well as by erasing, or forgetting, unneeded information that might otherwise clutter the nervous system.

Sleep affects many aspects of brain function, including:

learning

memory

problem-solving skills

creativity

decision making

focus

concentration

The table Paramecium Contractile Vacuole Contractions which correctly describes the bars on a bar graph representing the data is the bars range from tallest for very high concentration to shortest for very low concentration.

The data in the table records the number of contractions per minute of a paramecium's contractile vacuole in response to different salt concentrations in the surrounding environment.

A bar graph representing this data would have five bars, one for each level of salt concentration.

The bars would vary in height according to the number of contractions per minute, with the tallest bar representing the highest salt concentration and the shortest bar representing the lowest salt concentration.

Therefore, the correct statement describing the bars on the bar graph would be: "The bars range from tallest for very high concentration to shortest for very low concentration."

This statement accurately describes how the height of the bars would vary based on the data in the table.

The other statements do not accurately represent the data or the trends observed in the table.

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Answer:

True

Explanation:

The attached image shows a table that displays the eight (8) planets, their respective average distance from the sun and their respective orbital speeds.

The question only relates the orbital speed of planets Uranus and Venus, which is 7km/s and 35km/s respectively.

40% of the orbital speed of planet Venus is:

= 40/100 × 35

= 0.4 × 35

= 14

According to the table in the image, Uranus orbits around the sun at a speed of 7km/s, which is lesser than 40% of Venus's orbital speed (14km/s).

Therefore, it is TRUE that Uranus orbits the sun at less than 40% of the orbital speed of Venus.

Answer:

True

Explanation:

I tested it on IXL

Answer:

B. So you can always see the entire object at the higher magnification

Explanation:

A microscope is used to view objects smaller than the naked or unaided eyes can see. The objective lens, in conjunction with the occular or eye lens, is used to achieve this purpose. The objective lens are of different magnifications as follows: 10X, 40X, 100X etc.

However, as the magnification increases i.e. higher objective, the object in the field of view becomes smaller and less focused. Hence, the object in the field of view must first be centered at a lower magnification/objective lens before changing to a higher one in order for the entire object to be seen at a higher magnification.

Explanation:

A is the answer

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Answer: Yogurt has less lactose than most dairy products. Everyone responds to dairy differently, so a persons tolerance may be different than another person who’s also lactose intolerant.

Explanation:

Answer:

Force her/him

Explanation:

so that she /he can hear u

If an individual is heterozygous for the sickle cell trait, they will show not develop sickle cell disease. Option A.

Sickle cell anemia is a disease of the blood that is homozygous and recessive. Consequently, an individual needs to have two copies of the recessive allele in order to be affected by the disease.

Now, if an individual is heterozygous for the sickle cell allele, it means such an individual has only one recessive allele which is not enough for the disease to be expressed.

This is why individuals that are heterozygous for the sickle cell trait don't show symptoms of the sickle cell disease. Instead, they enjoy a hybrid vigor that confers malaria resistance. Hence, they do not have malaria as often as those that are homozygous dominant.

Homozygous recessive traits are different from dominant traits. In the latter, only a copy of the allele is needed to be dominant, at least, in order for the trait to be expressed.

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Answer: The elastic connective tissue

Explanation: Allow stretched tissues to recoil as pressure is reduced

Answer:    D

Explanation:

Answer:

Serious protein deficiency can cause swelling, fatty liver, skin degeneration, increase the severity of infections and stunt growth in children.

While true deficiency is rare in developed countries, low intake may cause muscle wasting and increase the risk of bone fracture

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Answer:

membranes and internal membranes — are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids.

Explanation:

PlZzzzz follow me

Answer:

A warm front forms when a warm air mass pushes into a cooler air mass, shown in the image to the right (A). Warm fronts often bring stormy weather as the warm air mass at the surface rises above the cool air mass, making clouds and storms. ... As the front passes over an area, the clouds become lower, and rain is likely

it rotates on its axis.have a good day:)

Part A:

The genes for feather color and texture are independently assorted, with light blue being more dominant than smooth and dark blue. It appears that the characteristics for wing colour (light blue vs. dark blue) and wing texture (smooth vs. ridged) are separately assorting based on the observed ratios of offspring with various combinations of wing colour and texture.

Part B:

One theory for why lactose tolerance evolved in humans is that increased selection during famines led some individuals to have a different food supply and increased fat consumption, which offered more resources for improved fitness. These two possibilities may serve as theories for the evolution of lactose tolerance in humans. One characteristic often seen in people with a history of dairy farming is the ability to digest lactose (the sugar contained in milk) from infancy.

Therefore, the correct options for Part A and Part B are B and B &D respectively.

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In the picture there is a food chain, that means each link obtains the energy from the immediately proceding level to live. And as you can see, the ones who begins the chain are plants, that is because they are producers of energy. Plants do photosynthesis and this is a process through which they transform light energy into chemical energy, thanks to the sun, water and mineral salts.

So all the enrgy comes form the sun.

No, "Crick and Watson" is not a type of genetic test. Crick and Watson refer to James D. Watson and Francis Crick, who were scientists involved in the discovery of the structure of DNA. They proposed the double-helix structure of DNA in 1953, which provided the foundation for understanding genetic information and its role in heredity.

Genetic tests, on the other hand, are laboratory tests that analyze an individual's DNA or genes to provide information about their genetic makeup, potential genetic disorders, or predispositions to certain conditions.

These tests can be used for various purposes, such as diagnosing genetic disorders, predicting the risk of developing certain diseases, determining carrier status for genetic conditions, or providing ancestry and genealogical information.

While Crick and Watson made significant contributions to the field of genetics, they are not directly associated with genetic testing. Genetic tests are based on scientific advancements and technologies developed after their groundbreaking discovery of the DNA structure.

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DNA content of the same cell at metaphase of meiosis ii will be 0.25x 21 0.5. Thus the correct answer is option (A). O.5

The chromosomes are at their second-highest level of condensing and coiling during the mitotic phase of the eukaryotic cell cycle, also known as metaphase. The chromosomes that carry the genetic material align in the mobile's equator before being split into each of the two daughter cells.

The chromosome centromeres congregate at the metaphase plate, also known as the equatorial plate, an illustration of a line situated equidistant from the two centrosome poles, during metaphase. This even alignment, which is comparable to a tug-of-war between two people with equal electrical potential, leads to the death of B cyclin. It results from the opposing kinetochore microtubules' tugging pressures counteracting one another.

The proper question is:

The DNA content of a diploid cell in the G1 phase of the cell cycle is measured If this DNA content is X, then the DNA content of the same cell at metaphase of meiosis I would bea.

(A). 0,5 X

(B). 0,25 X

(C).  X

(D). 2X

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Answer:

the giver of the comic book

Answer:

I think its B the answer. since earth pulls it gravitationally towards us

Answer:

Yes option ( B ) is right answer

due to gravitational pull of the planet it orbits

Thylakoid is the label for the part of a chloroplast where the light reactions occur.

The thylakoid membrane is where the light-dependent reactions of photosynthesis take place in chloroplasts. This is where light energy is absorbed by chlorophyll pigments and converted into chemical energy in the form of ATP and NADPH.

The thylakoid membrane is organized into stacks called grana, which contain the chlorophyll and other pigments that absorb light.

The thylakoid membrane is also home to other important molecules like cytochromes, which help transfer electrons during the photosynthetic process.

Overall, the thylakoid membrane plays a critical role in the photosynthesis process, providing the necessary environment and machinery for capturing light energy and transforming it into the energy needed for the plant's metabolism.

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Gametes are haploid cell that result from the meitoc division of a germ cell. In the exposed example, the correct option is A. Gametes will have either the A or a allele.

Gametes are haploid cells (n) that results from meiotic cell division. They carry half the number of chromosomes of the diploid parental cell (germ cell).

Gamete formation involves the random and independent segregation of the alleles during meiosis, which results in different chromosomal combinations in the daughter cells.

In the exposed example, there is a parental cell carrying a diallelic gene Aa. This cell divides, and each of the alleles migrate to one of the resulting gametes.

Parental cell) Aa

Gametes) A and a

The correct option is A. Gametes will have either the A or a allele.

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Answer:

all the black ones are aa all the white are Aa

it is a recessive trait

and 50% odds for the progeny to have it

Explanation:

Your risk is greatly raised if any of these relatives have had breast or ovarian cancer. However, until many of these “secondary” relatives have the disease.

A woman's risk of breast cancer nearly doubles if she has a first-degree family (mother, sister, or daughter) who has the disease.

Her risk is nearly three times higher if she has two first-degree relatives. A woman's risk of developing breast cancer is considerably higher if her father or sibling had the disease.

Gene changes that are connected to breast cancer are typically acquired.  Only the breast cancer cells experience acquired DNA alterations over time.

Therefore, Hereditary is Breast cancer and Inheritance is Getting Breast Cancer, basically it runs in the family inheriting.

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Answer:

B. Adenine and Thymine. :)

Answer:

Ribosomes

Explanation:

Ribosomes will not be found in an egg cell, human liver cell, and an amoeba.

They are found in prokaryotes and eukaryotes.

Answer:

Well...

You can say RIBOSOMES will not be found in Egg Cells!

Explanation:

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