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The nucleus of the cell organizes DNA. The nucleus contains structures resembling threads; Chromosomes are the more compact form of these structures.

In a eukaryotic cell, the most obvious organelle is the nucleus. It houses the cell's chromosomes and is where practically all DNA replication and RNA union happens. The nuclear envelope, a membrane that separates the nucleus from the cytoplasm, is spherical in shape. In their nuclei, each cell has a nearly identical copy of our DNA. However, because DNA molecules can stretch to a length of more than six feet, they are packed and arranged in a very specific way to fit in the tiny nucleus. Before cell division takes place, centrioles help organize the chromosomes, ensuring that each daughter cell has the correct number of chromosomes.

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Answer:

hygiene

Explanation:

because prevent is better than cure to stop germs from spreading

Type of asexual reproduction in snail is : During a process known as parthenogenesis, cell division allows unfertilized female gamete to develop without auto- or sexual fertilization. This results in an exact replica of parent snail.

Some hermaphrodite snails do not need another snail to reproduce, but can produce more snails all by themselves  and this is called asexual reproduction. Whereas, other snails are hermaphrodites but still need another snail to reproduce and this is called sexual reproduction.

Water snails are hermaphroditic and they reproduce asexually. Pond snails can also reproduce sexually and lay jellylike masses of eggs under water on plants and on the sides of the aquarium.

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Your anwser is: The water is contaminated with animal waste. I hope this helped and Merry Christmas to you!

The author use logos to support the argument made in Save the Coral Reefs by providing scientific evidence that humans are destroying coral reefs.

Using justifications, logos are literary devices that denote claims that persuade the reader of a particular idea.

In the essay "Save the Coral Reefs," the author employed logos to back up his claim by offering sufficient scientific evidence to prove that people are to blame for coral reef devastation.

He had explained the methods by which humans quickly damage coral reefs.

He produced this essay to persuade readers that coral reefs need to be preserved in order to protect the marine ecology.

Complete question:

How does the author use logos to support the argument made in Save the Coral Reefs?

A) by evoking in readers a sense of sympathy for the reefs being destroyed

B) by helping readers relate to the species that depend on the reefs to survive

C) by reporting observations of the reefs from personal scientific research

D) by providing scientific evidence that humans are destroying coral reefs

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Answer: Because these traits are more desirable their more likely to mate, and reproduce because they can outcompete the other plants for water soil and nutrition.

Explanation: Think of it like this, the strong take what they want and the weak don't get a say. In nature this involves food and water so the weak die off from starvation or get eaten and so they don't get a chance to reproduce. The strong who survive do reproduce and so there traits get passed down while the weak die off

The environment favors those individuals with the best phenotypes for survival, correctly identifies how natural selection causes a change in species.

The evidence-based scientific notion of evolution through natural selection best explains the immense diversity of living creatures on Earth. Natural selection is the process by which particular hereditary qualities are preferred within a population, such as the color of a fish, a person's height, or the form of a leaf.

A population is a collection of creatures that mate and reproduce together. Thousands of years of selecting forces have produced the forms, colors, sizes, and behaviors that improve organism survival and reproductive success in their habitat of origin.

Survival long enough to transmit genetic material on to progeny is referred to as evolutionary fitness and success. Traits that are handed on to children because they help them succeed are "chosen for continuation." Traits that are removed from the population because they are detrimental to success are referred to as "selected against continuation."

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Important constituents are also present in plasma. These also include antibodies and coagulation components like albumin and fibrinogen. When you donate blood, medical personnel can remove these crucial components from your plasma.

Plasma contains 91% to 92% water and 8% to 9% solids. Coagulants, notably fibrinogen, aid in blood clotting, which is what it mostly consists of. Two plasma proteins, albumin and globulin, help to maintain the colloidal osmotic pressure at 25 mmHg.

Plasma proteins come in more than 100 different varieties, however they may be divided into three fractions: plasma albumin, plasma globulin, and fibrinogen.

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Hormone gastrin released in response of vagus nerve, food in stomach.

A hormone is a class of signaling molecules in multicellular organisms that are sent to distant organs by complex biological processes to regulate physiology and behavior.

Hormones are are the body's chemical messengers, sending signals into the bloodstream and tissues. Hormones work slowly, over time, and affect many different processes, including growth and development, metabolism.

Endocrine glands, which are special groups of cells, make hormones. The major endocrine glands are the pituitary, pineal, thymus, thyroid, adrenal glands, and pancreas.

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Answer: Calvin cycle is the term used for the reactions of photosynthesis that use the energy stored by the light-dependent reactions to form glucose and other carbohydrate molecules. The Calvin cycle has three stages in order to produce glucose and other carbohydrate molecules

1) Carbon fixation: the enzyme RuBisCO incorporates carbon dioxide into an organic molecule.

2) reduction: the organic molecule is reduced.

3) regeneration: RuBP, the molecule that starts the cycle, is regenerated so that the cycle can continue.

In summary, it takes six turns of the Calvin cycle to fix six carbon atoms from CO2. These six turns require energy input from 12 ATP molecules and 12 NADPH molecules in the reduction step and 6 ATP molecules in the regeneration step.

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Life is challenging for a female lion in Etosha National Park. If a female's body size is approximately 130kg she must consume at least 13.500 kcal/day to survive and succeed in the environment.

There are ample prey species available, but just living and breathing costs a significant amount of anor nerday. This means that regardless of her hunting success, she will utilize energy for her resting metabolic rate.

Famalalinns have approacimately 15,000 kcal to expend during hunts and therefore, cannot expend more than 15,000 kcal for each hunt Your "kcal cash" will represent this useable amount of energy Materials.

Therefore, Life is challenging for a female lion in Etosha National Park. If a female's body size is approximately 130kg she must consume at least 13.500 kcal/day to survive and succeed in the environment.

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Reproducing in water makes getting sperm to egg much easier for snails, whereas on land it is much more difficult to get sperm to egg.

The majority of gastropods (snails) have internal fertilization, but some prosobranch species that have external fertilization.

Freshwater snail species are separately sexed. Males fertilize the female through copulation, and females attach their eggs directly to firm, clean substrates such as a rocks, logs, or aquatic vegetation in shallow water.

Aquatic snails have two tentacles whereas land snails have four. Eyes are located at the tips in land snails and at the base in aquatic snails.

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ΔF508 mutation that causes 70% of cases of cystic fibrosis.

Cystic fibrosis is an inherited life-threatening disorder characterized by damage to the lungs and digestive tract which affects the cells that produce mucus, sweat, and digestive juices, making these fluids thick and sticky. They then plug the tubes, ducts, and passageways.

It is a disease that is passed down through families and is caused by a faulty gene that causes the body to make an abnormally thick and sticky fluid, called mucus. This mucus is produced in the airways of the lungs and in the pancreas.

CF mutations are mainly caused by F508del which is thought to be a processing mutation. The F508del mutation removes a single amino acid from the CFTR protein.

Thus,  ΔF508 mutation that causes 70% of cases of cystic fibrosis.

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The horseshoe crab is an example of a living fossil because of (c) there are fossils of extinct ancestors of horseshoe crabs, and the species is still alive today.

They have remained essentially unaltered for approximately 445 million years, horseshoe crabs are believed to be living fossils. In most cases, they are not crabs, and neither lobsters nor crabs are particularly linked to them. The horseshoe crab shares a tight relationship with other arachnids and spiders.

In general, there are four different species of horseshoe crabs that are alive today, but the species known as Limulus polyphemus is the only one that can be discovered in North America. It can be found all the way from Maine to Mexico on the coasts of the Atlantic and Gulf of Mexico. So the correct option is (c).

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Using chemical energy that has been saved as a result of the light-dependent reactions, the light-independent reactions (Calvin cycle) "fix" CO2 and produce a substance that can be turned into glucose. The assembly of a glucose molecule is the ultimate goal of the Calvin cycle, often known as light-independent processes.

In the stroma of the chloroplast, the light independent process—also known as the dark reactions or Calvin-Benson cycle—happens. To create carbohydrates, carbon dioxide undergoes a sequence of chemical processes. ATP and NADPH produced during the light-dependent process provide the energy needed for these processes.

Fixation, reduction, and regeneration are the three fundamental phases that make up the light-independent processes, also referred to as the Calvin cycle.

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Each cell has a complicated and closely regulated process that goes from gene to protein. Transcription and translation make up the first two primary phases. Gene expression refers to the combined effects of transcription and translation.

The method by which proteins are made adheres to the principals of molecular biology, which serve as the foundation for all of the actions that occur in each and every cell in our body. The core dogma describes the transmission of information as taking place in the order DNA, RNA, and protein.

The process of copying DNA to create an RNA strand with a corresponding sequence is known as transcription. In order to create proteins, RNA is translated after that. Initiation and promoter are the key processes in transcription.

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Animals, as part of the nitrogen cycle, acquire some amino acids by eating plants.

Thus, the correct answer is C.

The nitrogen cycle is а repeаting cycle of processes during which nitrogen moves through both living аnd non-living things: the аtmosphere, soil, wаter, plаnts, аnimаls аnd bаcteriа. In order to move through the different pаrts of the cycle, nitrogen must chаnge forms. In the аtmosphere, nitrogen exists аs а gаs ([tex]N_{2}[/tex]), but in the soils, it exists аs nitrogen oxide, NO, аnd nitrogen dioxide, [tex]NO_{2}[/tex], аnd when used аs а fertilizer, cаn be found in other forms, such аs аmmoniа, [tex]NH_{3}[/tex], which cаn be processed even further into а different fertilizer, аmmonium nitrаte, or [tex]NH_{4}NO_{3}[/tex].

Nitrogen is а key element in the nucleic аcids DNА аnd RNА, which аre the most importаnt of аll biologicаl molecules аnd cruciаl for аll living things. When plаnts do not get enough nitrogen, they аre unаble to produce аmino аcids (substаnces thаt contаin nitrogen аnd hydrogen аnd mаke up mаny of living cells, muscles аnd tissue). Without аmino аcids, plаnts cаnnot mаke the speciаl proteins thаt the plаnt cells need to grow. Thus, animals acquire some amino acids by eating plants.

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tRNAs with the TTT anticodon recognize the AAA codon, which codes for lysine.

An anticodon is a trinucleotide sequence that is complementary to a matching codon in a messenger RNA (mRNA) sequence and is found at one end of a transfer RNA (tRNA) molecule.

When translated, an mRNA codon is a triplet or triple-nucleotide sequence that specifies an amino acid. The anticodon, a three-nucleotide sequence on tRNA, binds to the proper mRNA sequence. Which amino acid is provided by the tRNA molecule is determined by the anticodon sequence. One amino acid and one anticodon are carried by each tRNA. The cellular machinery recognises that the proper amino acid is available to be supplied to the developing protein when the anticodon successfully couples with an mRNA codon.

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Answer:

Living things have a variety of characteristics that are displayed to different degrees: they respire, move, respond to stimuli, reproduce and grow, and are dependent on their environment.

Explanation:

Mendel had to prohibit self-pollination since he was only interested in the progeny of two distinct parent plants. The flowers of some of the plants used in his tests had their anthers removed. After that, he manually pollinated them using pollen from other parent plants of his choosing.

Pea plants self-pollinate by nature. Pollen grains from anthers on one plant are transferred to stigmas of flowers on the same plant during self-pollination. Cross-pollination is the process by which pollen from one plant fertilizes another plant of the same species. Hybrids are the children that emerge from such a cross. Any offspring produced by the mating of two genetically separate individuals is referred to as a hybrid in this context.

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Empathy helps people to understand how others are feeling so we can respond appropriately to the situation.

Empathy is crucial because it allows us to understand how others are experiencing so that we can respond properly. It is commonly related with social behavior, and there is a large body of research demonstrating that increased empathy leads to more helpful behavior.

The researchers discovered that when individuals witnessed members of ethnic groups other than their own in pain, a brain region called the anterior cingulate cortex, which is frequently activated when we see others in suffering, was less active.

However, in other cases, feeling less empathy for a specific group of individuals may be beneficial. In a conflict, for example, it may be advantageous to feel less empathy for those you are attempting to kill, especially if they are also attempting to hurt you.

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Glucocorticoid hormones activate genes

Hence, all are correct.

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To water-culture a mongo seed One to one and a half cups of warm water should be added to a large container, preferably one made of glass like a mason jar, along with half a cup of mung beans.

Rubber band a cheesecloth or paper towel to the top of your container to provide space for your beans to breathe.

Soak the beans for eight to twelve hours at room temperature to cause swelling. The following day, or at least eight hours later, strain your beans. You can drain the water from the jar's top by using a sieve or a piece of cheesecloth. Re-rinse and drain the beans. For two to five days, do this. If you keep a container of sprouting alfalfa in a bright window for a few days, the tiny leaflets will turn green.

Rinse well in a sizable bowl of fresh water. Get rid of the hulls that appear on the surface. Give your sprouts one last rinse, and then let them air dry in a colander entirely before putting them in the refrigerator. Any beans with no sprouts should be sorted. Put them in a plastic bag or jar and refrigerate it.

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The obligatory water loss needed to excrete metabolic wastes is 400 ml per day.

The separation as well as elimination of metabolic waste from the body is referred to as excretion. This process involves many organs, including the lungs, gills, skin, and so on. The excretory system is made up of the kidneys and their ducts, which are the major full-time excretory organs.

In addition to a elimination of metabolic wastes, the excretory system maintains a proper water balance within the body: an equilibrium of water, inorganic salts, as well as other substances in the organism's internal environment. The problems of hydrological cycle encountered by marine, freshwater, as well as terrestrial vertebrates differ greatly, and it is remarkable that one‘s kidneys are so similar.

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The structures that are unique to neurons are axons, dendrites, myelin sheaths, and Nodes of Ranvier.

Neurons are nerve cells that send and receive messages to and from the brain. Neurons are very unique in structure. This uniqueness is because of the function of the cell itself. The signals from and to the brain are transported as action potentials. So neurons are structured accordingly.

The main parts of a neuron are

Cell body - It is the body of the neuron, also called Soma. It consists of a nucleus and other cell organelles.

Axons - A long tail-like structure that is connected to the cell body is called the axon. It is usually protected by a layer of a fatty substance called the myelin sheath.

Dendrites - These are the root-like structure that emerges from the cell body. It receives signals from the axons of other neurons.

Nodes of Ranvier are small regions on the axons where it is not protected by the myelin sheath. It allows faster transmission of electrical signals.

So the unique structures of neurons are Nodes of Ranvier, axons, dendrites, and myelin sheath.

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The structures which are unique to neurons are nodes of Ranvier, cell body, dendrites, axon, and myelin sheath.

The cells of the nervous system that are responsible for receiving and transmitting electrical impulses throughout the body are known as neurons or nerve cells.

The following components make up the neuron's structure: cell body, dendrites, axon, myelin sheath, and Nodes of Ranvier.

The cell body carries genetic information and is also known as soma. Axon carries electrical impulses away from the body of the cell, Dendrites are received extensions that look like trees, and the Ranvier nodes are cracks in a neuron's myelin sheath.

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In the case of Rapid eye movement (REM) sleep - The muscles are paralyzed, and body temperature, blood pressure, and heart rate and respiratory rate increase.

Hence, statement C is correct.

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Understanding human biology is crucial for biologists. People can be kept healthy and effective medicine can be developed by researchers thanks to our understanding of how the human body functions.

which researches various illnesses and how they impact both human and animal bodies. It can also be used to create or find novel treatments for ailments for which there are no existing drugs.

Since both biology and society are emergent systems, ongoing research is required to comprehend how they are changing. In order to comprehend how they are evolving, it is necessary to study the two unavoidable biological need for existence and reproduction in a dialectical manner.

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Answer: The Golgi apparatus generates the lysosomes and the lysosomes get rid of waste.

Explanation: Lysosomes would not be generated in the absence of the Golgi apparatus, and the cell would eventually die as a result of the buildup of dead and damaged molecules and organelles. Materials would no longer be packaged or transported if the Golgi apparatus were absent. The cell's secretory functions would also stop.

Animals with radial symmetry have only top and bottom surfaces; they lack front and rear surfaces as well as left and right sides.

The "oral side" and the "non-oral side" can be used to describe the two parts of a radial symmetry animal ("aboral side"). Animals can be categorized based on a variety of physical traits, including body covering, body form, appendages, and mode of movement. Body covering includes things like hair, fur, feathers, scales, and shells (e.g., walking, crawling, flying, swimming). Fish, amphibians, reptiles, mammals, and birds make up the five main groups that make up the phylum chordata (animals having backbones). All bilateral animal have an internal cavity or digestive system, and this cavity's tissue is produced from endoderm, the animal embryo's deepest tissue layer.

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Explanation about the molecules given below:

Its original definition, "the smallest unit of a material that yet preserves the qualities of that substance," was intended to be included by this designation. "An atom is a body that cannot be cut in two; a molecule is the smallest conceivable component of a specific material," wrote James Maxwell in 1873 when defining atom and molecule.

In this case, according to the given information, we can firstly bear to mind the fact that each ball color represents a different element, for that reason we can tell the following:

- Two black balls: they represent a diatomic molecule composed by two atoms of the same element.

- One black ball and two black balls: they represent a compound formed by two different elements.

- One gray ball and two black balls: they represent a compound formed by two different elements.

- Two black-dotted balls: they represent a diatomic molecule composed by two atoms of the same element.

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