Structure of plant cell

Answer:

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Explanation:

a: X amount of DNA per cell in haploid organisms (gametes) like sperms and eggs. b: 2X amount of DNA per cell in diploid organisms (diploid cells), during G1 or G2 phases of the cell cycle. c: 4X amount of DNA per cell in diploid organisms, during M phase or mitosis. It is also called 2C, which is the amount of DNA in two chromosomes sets (one maternal and one paternal) in a cell.

DNA (deoxyribonucleic acid) is an organic molecule that carries genetic information in most living organisms. DNA consists of two chains that coil around each other to form a double helix. The amount of DNA in a cell varies based on the organism, the cell type, and its stage of development.

Given the above conditions, we can say that the amount of DNA per cell varies based on the type of cell and its stage of development. DNA replication is the process in which a cell makes an identical copy of DNA, which occurs before mitosis (cell division) in diploid cells. The amount of DNA per cell doubles during the S phase of the cell cycle.

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The electron transport chain complex that does not pump protons across the inner mitochondrial membrane is Complex II.

Explanation:

Electron transport chain complexes are protein structures in the inner mitochondrial membrane that transfer electrons from one electron carrier to another, resulting in the creation of a proton gradient that powers ATP synthesis by ATP synthase, which is found in the same membrane.

The first three electron transport chain complexes pump protons from the mitochondrial matrix into the intermembrane space, resulting in the creation of a proton gradient across the inner mitochondrial membrane.

Complex II, on the other hand, is unique among the electron transport chain complexes since it does not pump protons across the inner mitochondrial membrane. Complex II is also known as succinate dehydrogenase, and it functions as both an enzyme in the Krebs cycle and an electron transport chain complex.

Succinate dehydrogenase is the enzyme that catalyzes the oxidation of succinate to fumarate in the Krebs cycle, and it accepts electrons from FADH2 produced by other Krebs cycle enzymes. As a result, Complex II only accepts electrons from FADH2, whereas the other electron transport chain complexes accept electrons from NADH and FADH2.

The other complexes, Complex I, Complex III, and Complex IV, are responsible for pumping protons across the membrane.

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Answer:

The weather change as the earth warms because since,20th century due to human activities, particularly fossil-fuel burning which increases heat- trapping greenhouse gas levels in Earth's atmosphere.

The substrate molecule that starts this metabolic pathway is threonine. The molecule of inhibition is isoleucine. It comes under non-competitive inhibition

when it connects to an allosteric site, it has the most substantial regulatory impact. The non-active site of an enzyme is in which the allosteric inhibitor interacts. The active site's architecture is altered to prevent the enzyme from binding to its substrate.

Through feedback inhibition, isoleucine inhibits threonine deaminase from working. Noncompetitive inhibitors are used in a common biochemical process called feedback inhibition to modulate some enzyme activity. In this process, the finished item blocks the enzyme that catalyses the initial reaction in a chain of reactions.

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Proteins in lamb chop, kidney beans, and thigh muscles are constructed of amino acids linked together to form one or more folded, polypeptide strands.

Amino acids are the building blocks of proteins, and there are 20 different types of amino acids commonly found in biological systems. The sequence of these amino acids determines the unique structure and function of each protein.

During protein synthesis, the amino acids are joined together through peptide bonds, forming long chains called polypeptides. These polypeptides then fold and twist into complex three-dimensional structures, with the specific structure determined by the sequence of amino acids and the interactions between them.

Therefore, the proteins found in lamb chop, kidney beans, and thigh muscles are all composed of amino acids linked together to form one or more polypeptide strands that fold into complex three-dimensional structures.

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Answer:

B. Bulimia

Explanation:

See below for a description of each case:

Anorexia (also known as Anorexia nervosa) is an eating disorder characterized by abnormally low body weight. It's similar to the starving of oneself to achieve lower weight, but this is unhealthy. It's very common (more than 3 million cases per year in US) and is treatable. This can last for several months or years and is more common in females from ages 18–35.

Some symptoms include:

Extreme weight loss

Thin appearance  

Fatigue and insomnia  

Bluish discoloration of the fingers

Hair that thins, breaks or falls out  

Amenorrhea (absence of menstruation)  

Dry or yellowish skin  

Dehydration

Bulimia (also known as Bulimia nervosa) is an eating disorder characterized by binge eating, followed by methods to avoid weight gain (ie. vomiting). It's very common (more than 3 million cases per year in US) and is treatable.  It can last several years or be lifelong and are more common in females from ages 18–35.

Some symptoms include:

Binge eating

Forceful vomiting

Long-term fear of gaining weight  

Overuse of laxatives or diuretics

Use of supplements or herbs for weight loss

Excessive exercises

Stained teeth (from stomach acid)

Obesity is a condition characterized by abnormal or excessive fat accumulation. It's extremely common (more than 3 million cases per year in US) but is treatable. It can last several years or be lifelong. Family history may increase likelihood for some types.

Some symptoms include:

Above average body weight  

Sleep apnea- a condition in which breathing is irregular and periodically stops during sleep  

Skin problems caused by moisture that accumulates in the folds of your skin  

Osteoarthritis in weight-bearing joints, especially the knees

Parkinson's disease is a chronic and progressive movement disorder, meaning it weakens the control of movements of the body over time. It's fairly common (more than 200,000 cases per year in US). There are treatments to manage the condition but there is no known cure. This can last several years or be lifelong. It's more common in 60+ years old males.

Some symptoms include:

Tremors, trembling of hands, arms, legs, jaw and face

Stiffness of the arms, legs and trunk

Slowness of movement

Poor balance and coordination

Speech difficulty

The optic tracts are a pair of nerve tracts that transport visual information from the retinas of each eye to the visual centres of the brain.

They form part of the visual pathway, which transports visual information from the eye to the brain.

The fibres that do not cross over form the optic tract, which runs from the optic chiasm to the brain's visual centres, including the thalamic lateral geniculate nucleus (LGN) and the occipital lobe's primary visual cortex.

The optic tract divides into smaller branches along the way, which synapse with other neurons in the visual pathway, allowing for more complex visual information processing.

Thus, the optic tracts are a pair of nerve tracts that carry visual information from the retinas of each eye to the brain's visual centres.

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Answer:Assimilation - This is how plants get nitrogen. They absorb nitrates from the soil into their roots. Then the nitrogen gets used in amino acids, nucleic acids, and chlorophyll.

Explanation:

The kinetic energy of the substance would decrease.

the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

Kinetic energy is the energy of motion, observable as the movement of an object, particle, or set of particles. Any object in motion is using kinetic energy: a person walking, a thrown baseball.

There are five main types of kinetic energy: radiant, thermal, sound, electrical, and mechanical.

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Answer:

Between silver and aluminum wires of same thickness and length, silver will offer lesser resistance.

Explanation:

Aluminum will offer higher resistance than silver (both having same thickness and length).

Silver has lesser resistivity than aluminum.

Resistivity is directly proportional to resistance.

Thus, between to wires of distinct materials, one with higher resistivity will offer greater resistance.

Answer:

Water separates polar molecules from each other by forming hydrogen bonds.

Explanation:

A polar molecule is a molecule in which the distribution of electrons between the covalently bonded atoms is not even. This means that one end of the bond is slightly more positively charged, while the other end is slightly more negatively charged.

An example of a polar molecule is a molecule of water (H2O). Substances with similar chemical characteristics dissolve in each other. This means that polar molecules will dissolve in water. The partially negative part of a water molecule will interact with the partially positive part of another polar molecule. This results in the formation of hydrogen bonds, which occur when a hydrogen atom is located between a pair of other atoms that have a high affinity for electrons.

Answer:

Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotype.

Explanation:

hope this helps

The human DNA analyze is usually conclusive evidence about a crime, since each individual has their unique genetic code. Fritz results were inconclusive, therefore the sample did not showed a result corresponding to the one on the crime scene. In this case Fritz is not guilty of shoplifting.

To assist the process of digestion and absorption, it is usually best to eat foods high in fiber and drink plenty of water.

Foods high in fiber and drinking plenty of water are some of the things that help with digestion and absorption of nutrients. Fiber, which is found in fruits, vegetables, whole grains, and legumes, helps to keep the digestive system healthy by promoting bowel regularity and preventing constipation.

In addition, fiber can also help to reduce the risk of some chronic diseases such as heart disease, diabetes, and certain types of cancer. Drinking plenty of water is also essential for good digestion. Water helps to keep the digestive system hydrated, which can help to prevent constipation and other digestive problems.

It also helps to flush waste products out of the body, which can help to reduce the risk of some chronic diseases and keep the body healthy. In conclusion, to assist the process of digestion and absorption, it is usually best to eat foods high in fiber and drink plenty of water.

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It must have a significant proportion of plant life that is endemic, or seen anywhere else on the earth, and at least 1,500 leguminous plants.30percent or less of the original vegetation must remain.

Endemics are what in biology?

In biology, the term "endemism" refers to the geographic distribution of a clade that is only present naturally in a narrow geographic area. As a result, species are those only exist in a particular region, such as a mountainous region, lake, or island, among other examples.

What are some instances of endemic species?

species of plants and animals that can only be found in a certain geographic area are known as endemic species.

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Answer:

if purple is the dominant allele (P) and white is the recessive allele (p) then it would be possible if both parents had the genotype Pp, then it would be possible for both parents to pass on the recessive gene (p) and have offspring with white flowers

Explanation:

Answer:

Haemoglobin; liver; binds; stored; bile duct; small intestine; lipids.

Explanation:

Serology can be defined as the study of blood and the reactions between antibodies and antigens in the blood.

In Biology, blood pH can be defined as a measure of the hydrogen ion (H¯) concentration of blood i.e the level of alkalinity or acidity of blood.

Basically, the normal blood pH of a human being should be between 7.35 and 7.45.

Hence, one of the ways in which the body regulates blood pH is with proteins. Proteins help regulate blood pH by accepting and releasing hydrogen ions. Typically, when the blood pH falls, the hydrogen ions (H¯) are accepted (absorbed) while hydrogen ions are released when the blood pH rises.

For example, a protein such as haemoglobin which makes up a composition of the red blood cells, binds an amount of acid required to regulate blood pH.

In the spleen, haemoglobin from red blood cells is broken down to form (unconjugated) bilirubin. Unconjugated bilirubin is insoluble in blood plasma so binds to albumens in the blood and is sent to the liver. Bilirubin binds with glucuronic acid to form conjugated bilirubin. It forms part of the bile, which is stored in the gall bladder. Food in the gut stimulates gall bladder contraction and the bile passes down the bile duct to the small intestine, where it aids in the digestion of lipids.

Answer:

C part is the correct answer

Answer:

chemical burns

Explanation:

I'm pretty sure this is it

Answer: Chronic back pain

Explanation: I got it right on Edge!!!!

Answer:

overwieght

Explanation:

Answer:

'Rare earth elements are in the first column on the left' is not true.

Explanation:

The rare earth metals are 17 metallic elements in the middle of the periodic table. Atomic numbers 21, 39, and, 51-57.

Answer:

D. Thr availability of safe places to rest

Explanation:

Thats like saying people could die because they don't have a place to sleep

B. The biodiversity of the population is not a limiting factor for coyotes.

Coyotes are medium-sized mammals belonging to the Canidae family, which also includes wolves, foxes, and dogs. They are native to North America and can be found in a variety of habitats, including deserts, forests, and grasslands.

Coyotes are highly adaptable and opportunistic, making use of a wide range of food sources, from small mammals such as rabbits and rodents, to fruits, insects, and even carrion. They are known for their distinctive howl, which they use to communicate with each other over long distances. Despite their reputation as pests, coyotes play an important role in maintaining the balance of ecosystems, and they are considered a valuable species in many regions.

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The angina represents an acute myocardial infarction, or a heart attack. Angina is a type of chest pain or discomfort that occurs when the heart muscle does not get enough blood and oxygen. This can happen due to narrowed or blocked arteries that supply blood to the heart.

There are different types of anginas, including stable angina, unstable angina, and variant angina also known as Prinz metal's angina. Stable angina is the most common type, and it typically occurs during physical activity or stress. Unstable angina is more serious and can occur at rest or with minimal exertion. Variant angina is caused by a spasm in the coronary artery, rather than a blockage. A myocardial infarction, or heart attack, occurs when there is a complete blockage of blood flow to the heart muscle, causing permanent damage. It is a more severe condition than angina and requires urgent medical treatment. In conclusion, not all types of anginas represent an acute myocardial infarction, or heart attack. However, angina can be a warning sign of a potential heart problem and requires proper diagnosis and treatment by a medical professional.

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ENSO phenomenon causes significan climate global changes, affecting especially the Southern Hemisphere. In south Asia regions, such as Philippines, the weather becomes cooler, drier than normal.

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The El Nino Southern Oscillation -ENSO- phenomenon produces due to a complex system of climatic oscillations between the ocean and the atmosphere.

This phenomenon causes significant perturbations in the usual pluvial regimens in the tropics. It provokes

ENSO phenomenon is dominant in the global climate system.

SOUTHERN HEMISPHERE

⇒ Under normal conditions

⇒ Under El Niño conditions

Among the affected areas in the Eastsouth Asia, we can mension the Philippines. Their economic activities are particularly affected during ENSO events.

NOTHERN HEMISPHERE

ENSO also provokes changes in general extratropical circulation, contributing to some abnormal situations in the northern hemisphere weather during winter, including severe precipitations and cooler temperatures in the southeast USA, north of Mexico, Gulf of Mexico, Strait of Florida, and western Cuba.  

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During semiconservative DNA replication, one of the DNA strands in each new double helix comes from the original molecule, and one is newly synthesized. It is for that reason that DNA replication is 'semiconservative'.

DNA is a double helix molecule composed of two long chains of nucleotides linked by hydrogen bonds.

Meselson and Stahl discovered that DNA replication is semiconservative by experimenting with the bacterium Escherichia coli.

During their experiments, Meselson and Stahl labeled the DNA of E. coli across generations using radioactive isotopes of nitrogen (N) and they observed that only one DNA strand contained these isotopes.

Thus, DNA replication is semiconservative because each daughter cell contained one newly synthesized DNA strand and one original DNA strand.

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