i need help with all of these please help!!!!! please do not comment something if its not going to help very desperate for help this is science by the way

According to documents you read about the history of DDT, it was the chemical first perceived by Americans as harmful, dangerous, and deadly (Option a).

Dichlorodiphenyltrichloroethane (DDT) is an insecticide used in many countries around the world in the past, which was disused due to serious harm to the health of humans and also life treating issues to wild life.

Therefore, with this data, we can see that dichlorodiphenyltrichloroethane (DDT)  is a well-known insecticide that was disused and capable of causing harm to humans and also wild life in the ecosystems.

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When glucose and oxygen are combined, carbon dioxide, water, & energy are produced.This process of converting glucose into energy in mammals is similar to how photosynthesis works in plants.

Electrons go from glucose to oxygen during cellular respiration, creating water and release of energy.They move in the reverse way during photosynthesis, beginning with water and ending with glucose, which is an energy-intensive process driven by light.

Photosynthesis requires an energy input because the products of photosynthesis, glucose and oxygen, have higher energy contents than the reactants, carbon dioxide and water.

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In addition to extending the thigh, the biceps femoris rotates the thigh outwards; whereas the semimembranosus and semitendinosus rotate the thigh inwards.

The biceps femoris rotates the thigh outward (laterally) and the semimembranosus and semitendinosus rotate the thigh inward (medially).

When the biceps femoris contracts, it pulls the femur bone outward and back, resulting in a lateral rotation of the thigh. This outward rotation of the thigh is called external rotation and is commonly seen when executing a squat.

Conversely, when the semimembranosus and semitendinosus contract, they pull the femur bone inward and back, resulting in a medial rotation of the thigh. This inward rotation of the thigh is called internal rotation and is commonly seen when performing a lunge.

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Convection occurs because heated material becomes less dense and sinks and is therefore denoted as option D.

This is referred to as the process in which heat is transferred by movement of a heated fluid such as air or water.

When a molecule is heated, the atoms spread slightly further apart, occupying a larger volume which results in a decrease in the density.The heat energy then moves the material in liquids and gases because when they all are heated they expand and become less dense and sinks thereby making it the correct choice in this scenario.

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The full question is:

Convection occurs because heated material becomes. a. less dense and rises. b. denser and rises. c. denser and sinks. d. less dense and sinks.

The key difference between saltatory conduction and continuous conduction is that saltatory conduction is the propagation of action potential along myelinated axons while continuous conduction is the propagation of action potential along unmyelinated axons.

Saltatory conduction, as used in the study of neurology, is the acceleration of the conduction velocity of action potentials as they move down myelinated axons between Ranvier nodes. In contrast to electrical conduction in a simple circuit, the only locations throughout the axon where ions are exchanged across the axon membrane to renew the action potential between segments of the axon that are insulated by myelin are the uninsulated nodes of Ranvier.

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Yeasts are added to a sugar, water, and hops mixture to make homebrew. To drive the yeast to undergo fermentation, it is essential to restrict the oxygen input. Upon allowing oxygen into the system, the production of oxygen will undergoes and the production of carbohydrates will take place.

In the presence of oxygen, yeast undergo aerobic respiration and convert carbohydrates (sugar source) into carbon dioxide and water. In the absence of oxygen, yeasts undergo fermentation and convert carbohydrates into carbon dioxide and alcohol. When oxygen is not present or if an organism is not able to undergo aerobic respiration, pyruvate will undergo a process called fermentation.

Fermentation does not require oxygen and is therefore anaerobic. Fermentation will replenish NAD+ from the NADH + H+ produced in glycolysis. Yeast use oxygen for cell membrane synthesis. Without oxygen, cell growth will be extremely limited. Yeast can only produce sterols and certain unsaturated fatty acids necessary for cell growth in the presence of oxygen.

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The level of ecological organization is the ecosystem.

We know that the term population has to do with the number of species that can be found in a given ecosystem that all share exactly the same characteristics. This implies that the organisms are able to interbreed.

The genetic make up of the organisms that make up a population must be just the same and would not change. Let us recall that the ecosystem refers to a self supporting unit that is composed of the living and the non living parts.

Thus, the ecosystem brings together the populations present in the region as well as the abiotic factors.

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Missing parts;

A field guide for one area describes all the populations present as well as the abiotic components of that region. Which level of ecological organization best describes the focus of this field guide?

answer choices

biome

biosphere

ecosystem

community

Answer:

meow meow meow meow, meow meow meow meow, meow meow

Explanation:

meow

The FTM tubes can be labeled as follow on basis of the growth patterns of different organisms based on their metabolic needs:

1. Aerobic, 2.  Microaerophilic, 3. Facultative, 4.  Anaerobic

The term "metabolism" refers to the biological process that gives humans the energy they need to survive. People's metabolisms can vary from person to person; for example, some people may have a fast metabolism while others may have a slow one. This genetic and hereditary difference in metabolism.

But physical activity and exercise can momentarily change the metabolism from high to slow and from slow to high. When we exercise regularly, our body automatically uses more energy, changing our slow metabolism to a high metabolism.

The complete question is:

Label these FTM tubes to demonstrate your understanding of the growth patterns of different organisms based on their metabolic need for or sensitivity to oxygen.

Facultative, Aerobic, Microaerophilic, Anaerobic,

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neuroinflammation, oxidative stress, and neurovascular dysfunction in depressive disorder Although the underlying mechanisms are not fully understood, nicotine addiction is typically seen in people with mental disorders.

The term "neuroinflammation" describes an inflammatory reaction that occurs in the brain or spinal cord. This inflammation is mediated by secondary messengers, reactive oxygen species, cytokines, and chemokines. Neuroinflammation: What causes it?

illustration of neuroinflammation

Neuroinflammation is the process by which the innate immune system of the brain is triggered in response to an inflammatory challenge, such as those provided by injury, infection, exposure to a toxin, neurodegenerative disease, or aging.

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Conversely, if the muscle fiber is overly stretched, there is not enough overlap between the thick and thin myofilaments.

During muscle contraction, the thick and thin filaments slide over each other, and the myosin head on the thick filament pulls on the thin filament. This sliding motion creates the force of muscle contraction.

Muscle fibers contain two types of protein filaments called myofilaments.

Thick filaments made of the protein myosin and thin filaments made of the protein actin. These filaments are arranged in a repeating pattern within the muscle fiber, with thick and thin filaments overlapping at specific points.

If the muscle fibers are overstretched, there may not be enough overlap between the thick and thin filaments to effectively perform the gliding motion. This can lead to weaker muscle contractions. Conversely, if muscle fibers are not sufficiently stretched, the overlap between filaments can become too great, resulting in weak muscle contraction. A good overlap is achieved when the muscle fibers are at resting length.

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Valine is more likely to be found on the exterior of a globular protein because it is a hydrophobic amino acid, meaning it tends to interact with other non-polar molecules and be repelled by water.

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The answer is:

light positioning (controlling how and where light strikes the retina) : extrinsic muscles, accommodation, cornea, pupil, ciliary bodies

sensory processing (how that information is processed): bipolar cells, ganglia cells, amacrine cells, occipital cortex, photoreceptors.

The eyes are among the organs of the visual system. They enable living creatures to perceive, analyze visual data, and carry out a variety of photoresponse activities that are not vision-dependent. When light is recognized by the eyes, electro-chemical impulses are then generated in the neurons (neurones). The eye in higher organisms is a complex optical system that collects light from the environment, regulates its intensity through a diaphragm, focuses it through an adjustable arrangement of lenses to form an image, converts this image into a series of electrical signals, and sends these signals to the brain via complex neural pathways that connect the eye via the cornea to the visual cortex and other regions of the brain.

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It is true to say that the process of respiration in root cells can make cations in the soil available for absorption into a root.

Roots, the underground piece of the plants, ingests air from the air holes spaces tracked down between the dirt particles. Thus, assimilated oxygen through attaches is used to free the energy that later on, is utilized to move salts and minerals from the dirt.

We realize that plants have  capacity to blend their own food via photosynthesis process. Photosynthesis happens in  those pieces of the plants which contains chlorophyll, the green plant parts. Photosynthesis is obvious to the point that on occasion it appears to cover the respiratory cycle in plants. Breath should not be confused with photosynthesis. Breath happens all as the day progressed, yet the photosynthesis cycle happens in the daytime, within the sight of daylight as it were. Therefore, breath becomes clear at evening time in plants.

This is the explanation we frequently hear individuals caution against dozing under a tree during evening time, as it might prompt suffocation because of overabundance measures of carbon dioxide freed by trees following breath.

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Answer:

carbon

Explanation:

Answer: Carbon dating

Explanation: Carbon dating is the process of putting events or fossils in order from oldest to youngest without using actual dates.

A study of the human ecological footprint conducted by the World Wildlife Fund in 2008 shows that  we have already exceeded the planet's biocapacity per person. The correct answer is choice a.

According to the 2008 Human Ecological Footprint study conducted by the World Wildlife Fund, we have already exceeded the Earth's biocapacity per person.

This means that humanity is consuming more resources than the earth can sustainably provide, leading to environmental degradation and climate change. Adopting more sustainable practices and policies by individuals, communities and governments is critical to ensuring sustainable sustainability.

Earth's biocapacity is the ability of Earth's ecosystems to produce resources and absorb waste and emissions. If humanity's ecological footprint is greater than the Earth's biocapacity, it means that we are using more resources than the planet can sustainably provide, leading to environmental degradation and climate change.

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In one sense, the term “genotype”—like the term “genome”—refers to the entire set of genes in the cells of an organism. In a narrower sense, however, it can refer to different alleles, or variant forms of a gene, for particular traits, or characteristics.

Based only on a pedigree, you might not always be able to ascertain the genotype of a person. An person may occasionally have homozygous dominant or heterozygous alleles for a characteristic. The relationships between a person and their parents, siblings, and children are frequently used to identify genotypes. The phenotypes of the children can be used to identify the unknown genotype. The unknown individual is homozygous dominant if pairing the recessive phenotypic individual with the unknown dominant phenotype (PP or Pp genotype) results in only dominant phenotypes (no recessive).

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The anterior and posterior roots of the thoracic spinal nerves merge to form a spinal nerve within an intervertebral foramen that is inferior to the vertebra.

The spinal canal and periphery are connected through a passageway called the intervertebral foramen. At all levels of the spine, it is situated between the pedicles of nearby vertebrae. The intervertebral foramen's borders have been described using a variety of classification techniques. The foramen is traversed by several constructions. These include the transforaminal ligaments, communication veins between the internal and exterior plexuses, the spinal artery of the segmental artery, the root of each spinal nerve, and recurrent meningeal (sinu-vertebral) nerves.

The anterior and posterior roots of the thoracic spinal nerves merge to form a spinal nerve within an intervertebral foramen that is ______ to the vertebra?

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A bigger change in velocity might result from a stronger force.

The object with less size will experience a greater change in velocity when 2 objects with different masses be subjected to the a force with the same strength.

A force is required to change the velocity of an item.The force applied on the item and its direction affect the type of velocity change.A larger force can cause an object's velocity to change more dramatically. 

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Answer: cheeks

Explanation:

balls

The Sahara and Negev deserts are both parts of the same ecosystem(biome).

Latitude has no effect on an ecosystem, but it does on a biome. All creatures participate in trophic interactions within food webs and chains in an ecosystem, however this is not always the case in a biome. Aquatic, grassland, forest, desert, and tundra biomes are the five main kinds, while some of these can be further broken down into more specialized groups, such as freshwater, marine, savanna, tropical rainforest, moderate rainforest, & taiga. Scientists may define a biome by defining the temperature range, soil type, quantity of light, and water that are peculiar to a location and create niches for particular species.

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A. Return to the low-power magnification, refocus on the object, then return to the high-power lens is most likely to resolve the issue.

This is helpful because you only need to use the fine adjustment on the high-power lens to see the object clearly once it is clear under low power.

Even though using lens-cleaning paper to clean the lens should help, getting the right focus at low power is important, so the second option is not the right choice. Because you typically use the Fine adjustment with high-power lenses and the coarse adjustment with low-power lenses, the third option is incorrect. The final choice would also be wrong because if you can focus with a low-power lens, there is nothing wrong with the slide.

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Answer:

Explanation:

Factors in an ecosystem that are helpful to the population and can increase the carrying capacity of the population are known as B. Biotic potential.

Environmental resistance put limits on the development of species in an ecosystem. So this factor can not increase the carrying capacity of the population.

Whereas, the biotic potential is the maximum capacity of species that can bring an increment in the population of the species. In the ideal condition species have potential capacity to reproduce.

So, biotic potential is the correct answer to this.

Balance larger molecules before smaller ones, is correct answer.

What is Chemical Equation?

A chemical equation is a symbol- and formula-based symbolic representation of a chemical reaction, with the reactant entities supplied on the left side and the product entities given on the right side.

Symbols are used in chemical equations to denote things like the direction of a reaction and the physical states of the reacting parties. In the year 1615, the French chemist Jean Beguin created the first chemical equation.

Chemical equations can be used to illustrate chemical reactions on paper; one such example is shown below (for the reaction between hydrogen gas and oxygen gas to form water).

2H2 + O2 → 2H2O

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The recombination frequency between the genes for wing type and body color is 0.10.

Genes are sections of DNA that contain the instructions for the production of proteins and other molecules that are essential for the functioning of living organisms. Genes are the basic units of heredity, and are passed down from parent to offspring through gametes. They are made up of DNA, which is a long molecule made up of four different building blocks known as nucleotides. Genes are responsible for determining the characteristics and traits of an organism, such as eye color, hair color, and even intelligence. Genes are also responsible for the expression of proteins, which are the molecules that carry out the instructions of the genes.

This is because there are a total of 1,443 offspring and 108 of them are different from the parents (107 wild type/black and 91 vestigial/grey).
The recombination frequency is calculated by taking the number of different offspring (108) and dividing by the total number of offspring (1,443), which gives 0.10.

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Answer:

Based on the information given in slides 3 and 5, p53 acts as a transcription factor for a set of genes involved in the cell cycle and apoptosis (programmed cell death).

Slide 3 states that p53 is a transcription factor that regulates the cell cycle and apoptosis. Slide 5 mentions that p53 activates the transcription of a set of genes involved in the cell cycle and apoptosis, including cyclin-dependent kinase inhibitor genes (CDKIs) and Bax.

CDKIs are proteins that inhibit the activity of cyclin-dependent kinases (CDKs), which are enzymes that regulate the cell cycle. Bax is a protein that promotes apoptosis.

Therefore, p53 acts as a transcription factor for a set of genes involved in the regulation of the cell cycle and apoptosis, including CDKIs and Bax.

Explanation:

P53 acts as a transcription factor and acts as a guardian of the cell, preventing the cell from getting into the cancer stage, and when the p53 is mutant, then various kinds of cancer are formed.

It is a transcription factor that regulates the expression of cells in the cell cycle and induces DNA repair and apoptosis when the cell is not good enough to go into the cell cycle. Because the loss of functional p53 protein is a common feature of many types of human cancer, it is one of the transcription factors that positively regulate the cell for normal cell division.

Hence, p53 acts as a transcription factor and acts as a guardian of the cell, preventing the cell from getting into the cancer stage, and when the p53 is mutant, then various kinds of cancer are formed.

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The ratio of offspring with the described trait to the total number of offspring: unattached earlobes and no cleft. So, the correct option is (B).

A phenotypic trait is defined as a specific form of a phenotypic characteristic of an organism which may be either inherited or environmentally determined, but usually occurs as a combination of both.

A heredity-related trait is a specific characteristic of an individual which may be determined by genes, environmental factors, or a combination of both. These can be qualitative (such as eye color) or quantitative (such as height or blood pressure).

Thus, the ratio of offspring with the described trait to the total number of offspring: unattached earlobes and no cleft. So, the correct option is (B).

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