Where does photosynthesis get its energy?
Sunlight and carbon dioxide
Sunlight and oxygen
ATP and carbon dioxide
ATP and oxygen

Answer:

A burning piece of wood is a chemical change, because you alter it, and it turns to ashes, and it is irreversible, where as you can make water cold again

Answer:

youre creating a new substance in a chemical reaction

Explanation:

by boiling water, you arent making anything new. you're just changing the form of the water.

by burning wood, you're inducing a chemical reaction because some new substance is being made with the reactants

Answer:

A

Explanation:

All the other answers have a cause with the oppisite

The frequency of the A allele is approximately 0.634.

The frequency of an allele is determined by the number of copies of that allele divided by the total number of alleles in the population. In this case, we can calculate the frequency of the A allele by summing the number of copies of the A allele (2 for each individual with genotype AA and 1 for each individual with genotype Aa) and dividing it by the total number of alleles (2 for each individual in the population).

The number of copies of the A allele can be calculated as follows:

Number of copies of A allele = (2 * number of individuals with genotype AA) + (1 * number of individuals with genotype Aa)

= (2 * 199) + (1 * 68)

= 398 + 68

= 466

The total number of alleles in the population can be calculated as follows:

Total number of alleles = (2 * number of individuals with genotype AA) + (2 * number of individuals with genotype Aa) + (2 * number of individuals with genotype aa)

= (2 * 199) + (2 * 68) + (2 * 133)

= 398 + 136 + 266

= 800

Therefore, the frequency of the A allele is:

Frequency of A allele = Number of copies of A allele / Total number of alleles

= 466 / 800

≈ 0.583

Rounded to three decimal places, the frequency of the A allele is 0.634.

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Third group of DNA polymerase joins Okazaki fragments.

The third DNA polymerase, Pol III, is primarily responsible for the duplication of chromosomal DNA, while other DNA polymerases are primarily involved in DNA repair and translesion DNA synthesis. The replicative machinery that functions at the replication fork includes Pol III HE along with a DNA helicase and a premise.

The primary replicative polymerase in prokaryotic cells, polymerase III, is involved in the synthesis of both the leading strand of DNA and Okazaki fragments by extending RNA primers. The RNA primers are subsequently taken out, and Polymerase I fills in the spaces left by the Okazaki fragments.

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Answer:

Question 13:

B. False

The most abundant photoreceptors that detect dim light are Rods, not Cones. Rods are highly sensitive to low light conditions and are responsible for vision in dim light and peripheral vision. Cones, on the other hand, are responsible for color vision and high visual acuity but are less sensitive to low light conditions.

Question 14:

A. True

The iris is the muscular tissue in the eye that adjusts the size of the pupil, controlling the amount of light entering the eye. It contracts or expands to regulate the size of the pupil in response to changing light conditions.

Question 15:

B. False

Opsins are visual pigments found in photoreceptor cells, specifically in the retina of the eye. They are responsible for capturing light and initiating the process of vision. Opsins are not derived from Vitamin D. Vitamin D is a separate compound involved in various physiological processes in the body, including calcium absorption and bone health.

Explanation:

Answer: D. to make it resistant to insects

Explanation:

Genetic modification is a powerful tool that can help us modify organisms to suit our needs. It is used in many different fields, such as medicine and agriculture, and has the potential to improve our lives in many ways. For example, it can be used to create new medicines or crops that are more resistant to diseases or pests.

Answer:

it is about common causes of demage to the central nervous system

It discusses typical reasons why the central nervous system gets hurt.

A car accident, sports injury, fall, stroke, ruptured brain aneurysm, lack of oxygen, gunshot, or explosive blast are just a few of the potential causes. Traumatic brain injuries and traumatic spine injuries are common names for these wounds.

Traumatic injuries, infections, metabolic issues, genetic reasons, and exposure to toxins are all potential causes of peripheral neuropathy. Diabetes is one of the most typical causes. Most often, those who suffer from peripheral neuropathy report their pain as stabbing, burning, or tingling.

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Answer:b, d

Explanation:

:)

"We may not know about all organisms present in the ancient world since not all organisms on Earth can be fossilized". The best statement is that Organisms that have soft bodies decay before they fossilize.

The animals represented via way of means of those newly found fossils, which include sponges, annelid worms, mollusks, and horseshoe crabs, lived at some stage in the Ordovician length among 480 million and 472 million years ago, making them the oldest ever found at some stage in this length.

For a soft-bodied animal to be fossilized, its frame should be blanketed from decomposition. The frame is typically uncovered to air and water with quite a little oxygen, so it decomposes rapidly. The animal is probable to be fossilized best if it's miles buried quickly after it dies (or whilst it's miles buried may be fossilized.

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The nucleus shows up as a dark spot in the centre of each cheek cell.

The nucleus is housed in the cytoplasm of a cell; an environment that house the cell functional organelles. The function of the nucleus is to organize DNA into chromosomes via three basic steps known as replication, transcription and translation. The nucleus is surrounded by the nucleoli; a more darkly pigmented spherical structure and a nuclear envelope a double membrane (inner and outer membrane).

The surrounding environment of the nucleus (nucleoli and nuclear envelope) are the site for ribosome assemblage. In cells that produces a large amount of protein, it is easy to site the nucleoli. Cells are either uninuclear or multinuclear that is containing one or more nucleus. The red blood cell is an example of a uninuclear cells while cells in the skeletal muscle are example of multinuclear cells

Elodea's flat, cuboidal leaf cells include a large central vacuole that is encircled by a thin coating of cytoplasm.

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A screening test called leukocyte esterase is utilized to find evidence of white blood cells in urine. You could have an infection in your bladder if this is the case. If such a test was positive, white blood cells as well as other indicators of infection must be looked for in the urine using a microscope.

Acute bacterial infection, perhaps cystitis, is anticipated to be discovered upon that urine culture plates assuming leukocyte esterase and nitrate tests are both positive.

Escherichia coli would be the cause of the urinary infection in this case, so we must find an antibiotic that would be effective against it. Therefore, first- as well as second-carbapenems, amoxicillin/clavulanic acid, and occasionally quinolones are chosen.

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Biologists classify the biosphere into the main types of ecosystems present on earth.

There are five main types of biomes: aquatic, grassland, forest, desert, and tundra. Some of these biomes can be further subdivided into more precise categories, such as freshwater, marine, savanna, tropical rainforest, temperate rainforest, and taiga. Marine and freshwater biomes are both included in aquatic biomes.

Shrubs predominate in the chaparral vegetation, which is suited to recurrent fires with some species generating seeds that only sprout following a hot fire.

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No Rami Communicantes is not characteristic of the parasympathetic division of the ANS. The other three characteristics are all common to the parasympathetic division.

Parasympathetic division of ANS is one of the two divisions of the autonomic nervous system. This division is responsible for the activation of the body during a relaxed state.

The parasympathetic division of the ANS is characterized by having no rami communicantes. Parasympathetic fibers are normally not found on thoracic spinal nerves. Instead, they emerge from sacral spinal nerves S2 through S4 and from the vagus nerve (CN X).

The parasympathetic division, unlike the sympathetic division, does not have a chain of ganglia adjacent to the spinal cord, but rather has terminal ganglia located close to the target organ. The preganglionic fibers of the parasympathetic division are quite long, while the postganglionic fibers are quite short.

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(a) The probability of a randomly chosen person having hemophilia is 0.000105.

(b) The probability that a given person with hemophilia is male is approximately 1.9.

(a) Probability that a randomly chosen person has hemophilia:

Haemophilia can affect both males and females, but we need to find the probability for both. Hence,

the probability of having hemophilia = probability that a randomly chosen person is male × probability that a male has hemophilia + probability that a randomly chosen person is female × probability that a female has hemophilia

Probability of having hemophilia in males = 2/10,000 = 0.0002

Probability of having hemophilia in females = 1/100,000 = 0.00001

Probability of a randomly chosen person is male = 0.5

Probability of a randomly chosen person is female = 0.5

Probability of having hemophilia = 0.5 × 0.0002 + 0.5 × 0.00001 = 0.000105

(b) Probability that a given person with haemophilia is a man:

From (a), we know that the probability of having hemophilia is 0.000105. Therefore, the probability that a given person with hemophilia is male is:

probability that a given person with haemophilia is a man = probability that a male has hemophilia/ probability of having hemophilia = 0.0002/0.000105 = 1.9048≈1.9 (approximately).

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White fibers that transmit impulses between corresponding areas in the opposite cerebral hemisphere are called Commissural

What are commissural fibers?

Hence, White fibers that transmit impulses between corresponding areas in the opposite cerebral hemisphere are called Commissural

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The amount of PCBs in a trout in the Great Lakes can vary drastically based on the specific lake and the age and health of the fish. Generally, PCB levels are much higher in the older, larger fish, and as such, the total mass of PCBs in a 4,500 g lake trout in the Great Lakes can range from 1-7 mg. However, due to the large size of the trout, the total mass of PCBs can be as much as 7 mg, which is enough to negatively affect its health.

PCBs (polychlorinated biphenyls) are a man-made chemical compound found in many environments, including the Great Lakes. PCBs have been linked to a variety of health concerns, including cancer and reproductive problems. As such, they are of great concern in the Great Lakes, where they are known to bioaccumulate in fish.

To calculate the total mass of PCBs in a lake trout in the Great Lakes, one must first determine the average concentration of PCBs in lake trout in the Great Lakes. The United States Environmental Protection Agency (EPA) has established an acceptable concentration of PCBs in the Great Lakes of 0.09 parts per million (ppm). Therefore, an average lake trout in the Great Lakes contains 0.09 ppm of PCBs.

The total mass of PCBs in a lake trout in the Great Lakes can then be calculated using the following equation:

Total mass of PCBs (in grams) = (Average lake trout weight) x (Average PCB concentration in the Great Lakes)

Therefore, for an average lake trout weighing 4,500 g, the total mass of PCBs in the Great Lakes would be 4,500 x 0.09 = 405 g.

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2.17 × 10^-2 g. It is caculated by the formula mass=density×volume (m=ρV). The mass of an object can be calculated by multiplying its density by its volume because density is a measure of mass per unit of volume.

For a body, mass is constant. Mass can be calculated using the formula: mass = volume density. A mass's weight is a measurement of the gravitational force at work on it. The kilogramme is the SI unit of mass. Total mass refers to the combined weight of the shell, its structural and support equipment, and the heaviest load that may be conveyed. In scientific contexts, mass is the quantity of "matter" (though it may be difficult to define "matter") in an item, whereas weight is the force of gravity acting on an object.

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Answer:

Cloud Formation can cause cloud droplets which then affect regional climate. In creating the droplets that form clouds and lead to precipitation

(B) 10x. The magnification of the ocular lens is 10x. Two lens systems' combined magnifications make up the entire magnification.

The height of an image to the height of an object is used to describe a lens' magnification. Additionally, the distance between the item and the image is provided. It is equivalent to the image distance to object distance ratio.

Anyone shopping for a microscope is aware of, or soon picks up on, the fact that the total magnification of a microscope is calculated by adding the powers of the objective lens and eyepiece together. A 10x objective and 10x eyepiece together provide a 100x magnification.

The sum of the magnifications from the two lens systems is the overall magnification. As a result, the 10X objective and 10X ocular lenses on the microscope would magnify the object by 10 x 10 or 100 times.

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The cells of the palisades are packed so tightly because they are packed with chloroplasts so that lots of sunlight can be absorbed for photosynthesis.

Long-term potentiation (LTP) is a process involving persistent strengthening of synapses that leads to a long-lasting increase in signal transmission between neurons.

long-term potentiation long lasting changes at neuronal levels that are involved in learning and memory increased responsiveness of a neuron due to synaptic changes.

LTP can be induced either by strong tetanic stimulation of a single pathway to a synapse, or cooperatively via the weaker stimulation of many. When one pathway into a synapse is stimulated weakly, it produces insufficient postsynaptic depolarization to induce LTP. Example of LTP is, if a mouse is placed in a pool of murky water, it will swim about until it finds a hidden platform to climb out on. With repetition, the mouse soon learns to locate the platform more quickly.

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Answer: A current, in a river or stream, is the flow of water influenced by gravity as the water moves downhill to reduce its potential energy. The current varies spatially as well as temporally within the stream, dependent upon the flow volume of water, stream gradient, and channel geometry.

Explanation:

Answer:

Currents help the water in rivers and streams flow downhill, with the ultimate goal of flowing into the oceans, which are at sea level.

Explanation:

got me a 100 on edge 2020

Answer:

Rain Forest

Explanation:

The Amazon Rain forest contains 10% of all the world's species! That's actually a really high number too!

Hope this helps!

The chemical bond that typically stores the most energy is the covalent bond, specifically the triple bond, as it involves the sharing of the highest number of electrons.

Covalent bonds involve the sharing of electrons between atoms, resulting in the formation of a stable molecule. Within covalent bonds, there are variations in bond strength, which correspond to the amount of energy required to break the bond.

Among covalent bonds, triple bonds are generally the strongest and store the most energy. Triple bonds involve the sharing of three pairs of electrons between two atoms. Examples include nitrogen gas (N2) and acetylene (C2H2), where the nitrogen and carbon atoms form triple bonds, respectively.

The strength of a covalent bond depends on several factors, including the number of shared electron pairs and the types of atoms involved. Bonds with higher bond orders (such as double or triple bonds) tend to be stronger and store more energy compared to single bonds.

It is important to note that other types of chemical bonds, such as ionic bonds and metallic bonds, also play significant roles in storing and releasing energy, but in general, covalent bonds, particularly triple bonds, are known for storing the most energy.

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When a single-character testcross yields offspring that all have the dominant phenotype, it indicates that the parent with the dominant phenotype was homozygous. This is because the offspring inherited a dominant allele from the homozygous parent, resulting in all offspring showing the dominant phenotype. The correct option is A.

If the parent with the dominant phenotype was heterozygous, there would be a 50% chance for each offspring to inherit the dominant allele and show the dominant phenotype, and a 50% chance to inherit the recessive allele and show the recessive phenotype.

Epistasis occurs when the expression of one gene is affected by the expression of another gene, and it is not indicated by a single-character testcross. Codominance occurs when both alleles of a gene are expressed equally in the phenotype, which is also not indicated by a single-character testcross.

It is possible for both parents to be heterozygous and still have offspring that all show the dominant phenotype, but this scenario would not be indicated by a single-character testcross. In summary, when a single-character testcross yields offspring that all have the dominant phenotype, it indicates that the parent with the dominant phenotype was homozygous. Thus, The correct option is A.

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Processing speed in middle childhood increases due to advances in automatization, including increased myelination in the central nervous system and the development of automatic habits for routine tasks.

In middle childhood, processing speed increases as a result of advances in automatization. This is primarily due to two factors: increased myelination in the central nervous system and the development of automatic habits.

Firstly, myelination refers to the process of forming a protective fatty sheath called myelin around nerve fibers. During middle childhood, there is a significant increase in myelination in the central nervous system. Myelin acts as insulation for nerve fibers, allowing electrical impulses to travel more efficiently along neural pathways. This increased myelination leads to faster transmission of signals between different regions of the brain, resulting in quicker cognitive processing. As a result, thinking and information processing become faster and more efficient.

Secondly, during middle childhood, children develop automatic habits for various tasks. These habits are formed through repeated practice and reinforcement. Activities such as reading, tying shoes, or riding a bicycle become automated through practice and repetition. Once a skill becomes automatic, the child no longer needs to consciously think about each step involved. This reduces the cognitive load required to perform the task and allows for quicker execution.

The combination of increased myelination in the central nervous system and the development of automatic habits contributes to the overall increase in processing speed during middle childhood. The brain becomes more efficient in transmitting and processing information, and routine tasks are completed more quickly due to reduced cognitive effort. These advances in automatization play a significant role in the cognitive development and increased processing speed observed during this period of childhood.

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When the five requirements listed below are met, the Hardy Weinberg equilibrium asserts that perhaps the allelic frequency of organisms remains constant from generation to generation.The five conditions are.:

1) Large population size

2) Random mating

3) Sexual reproduction is necessary

4) No migration

5) No evolution (no natural selection)

If any of these five conditions is violated, Hardy Weinberg equilibrium cannot be used to forecast genotype frequencies.

Option-d evolutionhas occurred is the right answer since it violates the Hardy Weinberg equilibrium criteria.

What is Hardy-Weinberg principle?

The Hardy-Weinberg principle, also known as the Hardy-Weinberg equilibrium, model, theorem, or law in population genetics, holds that in the absence of additional evolutionary factors, allele and genotype frequencies in a population would remain constant from generation to generation.

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