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Subunits and structures of the three types of cytoskeletal fibers are microfilaments, microtubules, and intermediate filaments.

Microfilaments help to create the forces used in cellular contraction and basic cell movements. They are also involved in cellular movement that includes contraction and cytokinesis .

Microtubules are involved in many functions that include assembly of mitotic spindle, in dividing cells, or axon extension inside neurons. They are also responsible for determining shape of the cell .

Intermediate filaments are involved in structural role by providing mechanical strength to cells and tissues. They are basically involved in the movement of the cell and generally found in hair , scales and finger nails .

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5 organs of Digestive system :-

What happens in each organ of the digestive system.

Two enzymes involved

The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion. Digestion includes the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the frame.

The digestive system includes the mouth, pharynx , esophagus, belly, small intestine, massive gut, rectum, and anus. it is also the salivary glands, liver, gallbladder, and pancreas, which make digestive juices and enzymes that help the body digest food and beverages.

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Darwin postulated that competition within a niche was the driving force for diversification. In other words, if you can fill a new niche, your odds of successfully reproducing go up. He called it the "principle of divergence" and thought it was one of his most important epiphanies.

Contemporary biologists, on the other hand, would often contend that geographic isolation of a population is the most probable reason for speciation. Due to different niches being present in various places, two populations that were once connected are now isolated from one another. However, it is generally accepted that isolation rather than niche changes contributed more to the beginning of speciation.

Thus, isolation along with entirely untapped niches often accounts for the broad speciation seen in adaptive radiations.

The process of speciation is how populations become different species. Cladogenesis, the separation of lineages, was first described by the scientist Orator F. Cook in 1906. Cladogenesis is in contrast to anagenesis, which relates to phyletic evolution within lineages.

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When a motor unit is sufficiently stimulated, all of the muscle fibers in that motor unit will contract is a true statement.

They are referred to as the smallest unit of the nervous system and comprises of muscle fibers which number about one to 1000 depending on various factors.

An  example of a motor unit is known as soleus which is present in the lower leg and stimulation which is sufficient will result in muscle fibers contracting and being activated. This results in the production of maximum muscle force as a result which is why true was chosen.

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The full question is:

When a motor unit is sufficiently stimulated, all of the muscle fibers in that motor unit will contract? true/false

Answer:

A

Explanation:

a habitat is simply the specific area something lives

The habitat of a plant would include the area around the plant above and below the soil. Therefore, option (A) is correct.

A plant's habitat consists of the region immediately surrounding the plant as well as the soil, water, air, and any other living species that interact with the plant. Because it encompasses the root system as well as the immediate vicinity of the plant, the area around the plant, both above and below the soil, is particularly significant due to the fact that it can have a significant influence on the amount of nutrients, water, and other resources that are readily available.

Additionally, the presence of other plants, animals, and microorganisms in the surrounding area can also have an effect on the habitat of the plant. This is because these other organisms can provide competition for resources, pollinators for reproduction, and predators or herbivores that may feed on the plant.

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The statement that describes the formation of horizon B is that it undergoes the most change (option C).

Soil profile is a vertical cross-section of the soil, made of layers running parallel to the surface. These layers are known as soil horizons.

These different layers of soil are as follows:

The subsoil or B horizon is the horizon present just below the topsoil (horizon A) and above the bedrock or parent material.

The horizon B layer is less organic (contains low humus) but is rich in minerals brought down from the topsoil. The subsoil undergoes significant changes.

Therefore, it can be said that the horizon B layer undergoes the most change.

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Answer: c. undergoes the most change

Explanation:

Answer:

In the case of cellular respiration, the photosynthesis equation is opposite. The reactants and products are modified in both processes.

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The diversity of algal species is calculated for a coastal area before and after an oil spill has independent water (before and after the oil disaster) and dependent-algal species diversity.

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It is false that the energy used to do cellular work is harnessed by breaking the high energy deoxyribose bonds.

ATP meaning adenosine triphosphate is a biological molecule is that is used as a source of energy in cellular reactions.

ATP is an energy carrier and the only usable form of energy by living cells.

ATP is made up of the following three components;

Energy is stored by the ATP molecule when a phosphate group is added to the ADP while energy is released for use when a phosphate bond is broken to form ADP.

The above explanation invalidates the statement that energy is released by the breaking of high energy deoxyribose bonds.

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A. Wetlands have a high carrying capacity, meaning they can support a large number of species. This is due to the diversity of habitats within the wetland, providing numerous sources of food, shelter, and protection.

Diversity is the inclusion of individuals from different backgrounds, cultures, and experiences, including but not limited to race, ethnicity, gender, sexual orientation, age, language, physical and mental ability, religious beliefs, political beliefs, and socio-economic status.

B. Wetlands act as natural water purification systems, removing pollutants from water and providing a healthy environment for aquatic organisms. This helps to maintain a healthy balance between human activity and the environment.
C. Wetlands make creating new habitats easy, since they are naturally rich in biodiversity. This makes it possible for species to easily take up residence in the wetland, providing them with the resources they need to survive and thrive.

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Lactic Acid Fermentation is the processes we would expect to be key in the production of yogurt.

Fermentation is a natural process that can be used in a number of ways for wide variety of food products. Yogurt forms when bacteria ferment the milk sugar, known as lactose, into lactic acid. The lactic acid makes the milk more acidic (lower pH) causing the proteins to coagulate.

Yogurt is a product of the acidic fermentation of milk. The lactose in the milk is converted to lactic acid, which lowers the pH. The production of yoghurt is a relatively simple procedure. Milk, which can be fortified with milk powder to give a thicker product, is pasteurized, cooled and inoculated with starter bacteria, which ferment the milk, causing it to clot or gel.

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The statement that describes how radiation causes mutation is as follows: Radiation breaks down DNA bonds, and the cell repairs the bonds incorrectly (option C).

Mutation is any heritable change of the base-pair sequence of genetic material i.e. the alteration in the DNA sequence of a genetic material caused by errors during DNA replication, mutagens etc.

Radiation is one of the major causes of mutation. Ionizing radiation directly affects DNA structure by inducing DNA breaks or breaking of DNA bonds.

The DNA structure is directly responsible for the function as a storage molecule. Hence, any alteration in the DNA structure will damage it.

However, the cell attempts to repair it but does so incorrectly resulting in the production of a mutated DNA.

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Answer:

They include sedimentation, pollution, climate change, deforestation, landscape changes, and urban growth.

Explanation:

Gypsum deposits are formed as a result of plate tectonics. Tectonic movement can raise a shallow sea, which causes water to evaporate.

The correct option is D.

A fluxing agent, fertilizer, filler in the paper as well as textiles, cement are among the uses for  gypsum. For usage as plaster of Paris and as construction materials in plaster, Keene's cement, board products, tiles, and blocks, around three-fourths of the entire production is calcined.

An enormous, unevenly shaped slab of solid rock known as a tectonic plate—also known as a lithospheric plate—is typically made up of both oceanic and continental lithosphere. The Pacific and Antarctic Plates are two of the largest, however plate sizes can range from a few hundred through thousands of kilometers broad.

According to the idea of plate tectonics, the mantle—the inner, rocky layer above the planet's core—is covered by enormous, solid rock slabs that are broken up into "plates" that move over the planet's crust.

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Answer:   Pure cellulose would be expected to give a negative Benedict test result. Benedict's test reacts positively to monosaccharides and some disaccharides. These carbohydrates have one or two six-carbon rings. Cellulose is a polysaccharide and is too large and complex to form chemical reactions with Benedict's solution.

Explanation:

There are numerous ways through which we can reduce the smog problem like turning the engine of car off, not burning garbage in open.

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Answer:

Pollutant A

Explanation:

It's not clear image but the bar graph shows that bar A is the smallest.

Answer:

Myofilament

Nebulin

Tropomodulin

SYNPO2

The Possible subclaims in relation to Investigating Energy Systems is Option C: The Solar Cell System has energy.

The Evidence: As the sun shines on a solar panel, energy is captured by the PV cells on the panel. This Matters significant because it causes the flow of electricity by generating electrical charges that are accelerated by a shifting internal electrical field within the cell. Therefore, a solar cell system is one that has some amount of energy therein.

A solar cell, also known as a photovoltaic cell, is an electrical device that uses the photovoltaic effect, a natural physical and chemical phenomena, to convert light energy directly into electricity.

Solar cells, commonly known as photovoltaic cells, convert sunlight directly into electricity. Solar cells are a reliable, small, and low-maintenance source of renewable energy. Solar cells frequently produce electricity in remote locations, allowing machinery to be powered far from the nearest electrical outlet.

Therefore, A photovoltaic (PV) cell, also known as a solar cell, can either reflect, as well as absorb, or pass via light that strikes it. The semiconductor material that makes up the PV cell is "semi" conducts electricity better than an insulator.

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Answer:he key difference between prokaryotic and eukaryotic ribosomes is that the prokaryotic ribosomes are 70S particles composed of 50S large subunit and 30S small subunit while the eukaryotic ribosomes are 80S particles composed of 60S large subunit and a 40S small subunit.. Prokaryotes and eukaryotes are two major groups of living organisms that differ from the cellular organization.

Explanation:

27524-RT is an open treatment for right patella fractures. A region containing the placement of internal fixation is opened. The remaining patella was a fragment wired with the modifier -RT to indicate that the right S82.001A was an unspecified closed fracture of the patella.

There was no indication that the fracture was open and the bone was sticking out of the skin. If you do not specify whether it is open or closed, the fracture is reported as closed. W10.1XXA reports a fall or fall onto a sidewalk or curb. Option A.

Depending on your age and medical condition it takes about 3-6 months to recover from a fractured patella, but very serious patella injuries may take longer. you may be advised to avoid kneeling or other activities that put a strain on your knee joints for a while. Implant removal may be necessary as wires may protrude from under the skin. Implants should be removed within one year after surgery.

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a. The results of the cross between the fruit flies will be:

Rr, Rr, Rr and Rr.

Answer:

Ok, there are multiple ways of model this, one of the ways can be:

Knowing that a hornworm can strip a tomato plant of its foliage in about two days, we can count the number of hornworms (x, the input) and find the number of plants (y, the output) that they can eat in a day.

So, if a hornworm can eat a plant in two days, then in one day the worm can eat half a plant.

Then:

y = (0.5plants/worm)*x

This says:

The number of plants eaten in one day (y) is equal to half of the number of hornworms

OF course, there are a lot of other ways to model this, for example we can use the time as a variable x, and the number of plants as y.

Knowing that a worm eats a plant in two days:

y = (0.5 plants/day)*x

Now x is the number of days, and y is the number of plants that can be eaten by a single worm

Answer:

Insomnia is a common sleep disorder that can make it hard to fall asleep, hard to stay asleep, or cause you to wake up too early and not be able to get back to sleep. You may still feel tired when you wake up.

Explanation:

hope this helps (❁´◡`❁)

insomnia is a common sleep disorder that can make it hard to fall asleep, hard to stay asleep, or cause you to wake up too early and not be able to get back to sleep. You may still feel tired when you wake up.

example:- me. if I sleep it's hard for me to wake up