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An electrical signal called an action potential that travels down the motor neuron and releases the neurotransmitter acetylcholine (ACh) at the neuromuscular junction is what causes skeletal muscle contraction.

The neuromuscular junction, or synapses between a motoneuron and a muscle fibre, is where skeletal muscle contraction starts. Transmission of action potentials to the motoneuron and subsequent depolarization results in the opening of voltage-gated calcium (Ca2+) channels of the presynaptic membrane.

contraction of skeletal muscles. (A) As calcium binds to troponin, the actin active site is revealed. (b) Actin is drawn to the myosin head, which then binds to actin at its actin-binding site to create the cross-bridge.

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Answer:The most distinctive feature of Parasaurolophus was the long, narrow, backward-curving crest that grew out of the back of its skull. Recently, a team of paleontologists computer-modeled this crest from various fossil specimens and fed it with a virtual blast of air.

Explanation:

Answer:

The correct answer is c. unnatural behavior.

Explanation:

Animals in a zoo are influenced by their environment, and one of the ways this influence is manifested is through unnatural behavior. In a zoo setting, animals are often kept in confined spaces that may not mimic their natural habitats adequately. This can lead to behavioral changes and adaptations that are not typical of their wild counterparts. Animals may exhibit abnormal behaviors such as pacing, stereotypic movements, or self-injurious behaviors due to stress, frustration, or lack of environmental enrichment.

While it is possible for animals in a zoo to display increased natural instincts, decreased aggression, or increased appetite in certain situations, these outcomes are not universally applicable or exclusive to zoo environments. They can vary depending on the species, individual, and specific circumstances. However, unnatural behavior is a commonly observed consequence of animals being in an environment that does not fully meet their natural behavioral and environmental needs.

The process that allows organisms to grow and heal is mitosis.

The process that produces clones of the parent organism is mitosis.

The process that copies DNA before cell division is replication.

The process that creates genetic variation in the resulting cells is meiosis.

Cell division is a process whereby cells divide to produce daughter cells. There are two types of cell division:

In mitosis, cells divide to produce daughter cells that are exact copies of their parents. The division is otherwise known as the equational division or the division of vegetative cells. The division of vegetative cells is essential growth and healing of wounds.

In meiosis, cells divide to produce daughter cells that are genetic variants of their parent cells. The daughter cells are unique from the parent cells both morphologically and genetically. Meiotic cell division is otherwise known as reductional division because the daughter cells have half the genetic copies of their parent cells.

Be it mitosis or meiosis, cells make copies of their DNA before irreversibly committing to divide. The copying of DNA is otherwise known as replication. Replication happens at the S phase of the cell cycle with each DNA strand acting as a template for the synthesis of its complementary copy.

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Answer:

O B. Restriction enzymes

Explanation:

Restriction enzymes has the ability to recognize specific DNA sequences and cut them in a specific manner in order to produced by the bacteria as a defense mechanism against foreign DNA containing substance such as viruses etc. This restriction enzyme is also called restriction endonucleases. This is a cloning tool that bacteria produced naturally in order to defend itself from the infection of virus.

Answer:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

Explanation:

The notation ppt refers to parts per trillion units, that is, how many parts of enzyme are there in 1 trillion parts. Percentage refers to the number of parts per 100 units. Converting the given values from percentage to ppt:

\(\frac{2.5}{100}=\frac{a}{1,000,000,000,000}\\a=2.5 *10^{10}\ ppt\\\\\frac{5.0}{100}=\frac{b}{1,000,000,000,000}\\b=5.0 *10^{10}\ ppt\\\\\frac{10}{100}=\frac{c}{1,000,000,000,000}\\c=1*10^{11}\ ppt\)

The concentration in ppt are:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

1 Percent [%] = 10 000 000 000 Parts per trillion [ppt]

1%  = 10 000 000 000 ppt

2.5% = ?

Cross multiply

2.5% x 10 000 000 000 ppt / 1 %

= 25, 000 000 000 ppt

1%  = 10 000 000 000 ppt

5% = ?

Cross multiply

5% x 10 000 000 000 ppt / 1 %

= 50, 000 000 000 ppt

1%  = 10 000 000 000 ppt

10% = ?

Cross multiply

10% x 10 000 000 000 ppt / 1 %

= 100, 000 000 000 ppt

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Answer:

It's because an organism's phenotype, or physical traits, are what truly decide whether it can reproduce and pass on its genotype to the following generation.

Because the phenotype of an organism represents the alleles that are actually expressed in that organism, natural selection affects that phenotype.

Explanation:

Answer:

The lithosphere.

Explanation:

None of the choices A-D are correct because the energy stored in a glucose molecule is not released in the form of ATP, Carbon dioxide, PGAL, FADH2, or ADP. Instead, this energy is used to break down the glucose molecule into two molecules of pyruvate.

Glycolysis is a metabolic pathway that breaks down glucose molecules into two molecules of pyruvate and two molecules of ATP. This reaction occurs in the cytosol of cells and is the first step of cellular respiration. During this reaction, the energy stored in glucose is converted into a usable form of energy in the form of ATP.

However, only a small amount of ATP is produced during glycolysis because most of the energy stored in a glucose molecule remains in the bonds of the glucose molecule itself. This energy is not released in the form of ATP but instead is used to break down the glucose molecule into pyruvate.

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Answer:

the amount of calcium is variable.

Explanation:

osteoporosis is an illness that is caused by lack of calcium in a person's body.

Answer:

Canada

Explanation:

Factors such as  high heat and high pressure have to be present in order for metamorphic rocks to form.

This is referred to as a solid collection of mineral grains that grow or become cemented together and are formed through various types of techniques.

Metamorphic rocks in the other hand is referred to as any of a class of rocks that result from the alteration of preexisting rocks in response to changing environmental conditions and the process it undergoes is metamorphism hence the name given to it.

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids etc or combination of the factors mentioned above which are usually present in the deep region within the Earth or where tectonic plates meet.

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Answer:

Force her/him

Explanation:

so that she /he can hear u

Answer:

Answer: B

Explanation:

Question:

On a logistic population growth curve, the growth starts to slow down after initial growth because there aren't enough resources to support as many new individuals?.​

Answer:

Correct

Explanation:

In the Logistic growth model, the population growth depends on density, the natality and mortality rate depends on the population size, which means that there is no independence between population growth and population density.

When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population's per capita growth rate decreases as population size increases. The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.

K is a constant that coincides with the size of the population at the equilibrium point when the natality rate and the mortality rate get qual to each other.

If the population size, N, is inferior to K (N<K) the population can still grow. When N approximates to K, the population´s growth speed decreases. When N=K, the population reaches equilibrium, and when N is superior to K (N>K) the population must decrease in size because there are not enough resources to maintain that size.  

The sigmoid curve represents the logistic growth model. At the beginning population grow slowly. In the second stage, the population size increases rapidly. And finally, slowly and gradually, the population reaches the equilibrium point, K, which depends on resource availability. This point belongs to the stage where food starts to become harder to find, and much of the living space is occupied.

Answer: exponential

hope this helps

Their movement will require the input of energy. That is option B.

An active transport is defined as the movement of molecules across the cell membrane from different compartments in the living organism.

The active transport makes use of energy because of the need to move molecules from a semi permeable membrane that is against a concentration gradient.

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Evaluating the assessment of a construction company's land involves looking at the data they have collected, but also considering the potential for long-term sustainability of the development.

Animal kingdom is a taxonomic category of living organisms that includes all animals, from mammals and birds to reptiles, amphibians, and fish, as well as the more primitive invertebrates such as sponges, jellyfish, and worms. All animals share certain traits, such as the ability to move, sense their environment, and reproduce. Animals are also multicellular organisms that are made up of specialized cells. Animals are classified into different groups based on their characteristics and habitats.

It is important to consider the potential environmental risks associated with a certain location and the impacts it could have on the surrounding area. The evaluation should include assessing the soil type, shape of the land, topography, and vegetation, but it should also include a thorough analysis of the existing infrastructure, potential risks associated with climate change, and the capacity of the land to sustain a certain type of development.

To improve the assessment, it is important to look at the social, economic, and environmental implications of the development. It is necessary to consider the potential for increased traffic, air pollution, and other environmental impacts. Additionally, it is important to assess the capacity of the land to support the chosen type of development and to ensure that the development does not disrupt existing ecosystems or negatively impact the local population. Finally, it is essential to consider the potential for long-term sustainability of the development, including energy sources, water sources, and other resources necessary for the development. By taking an integrated approach to evaluation and considering the potential implications of the development, the construction company can ensure that the chosen plot of land is suitable for the desired development.

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Answer:

Sustainable development.

Explanation:

Sustainable development is the only way through which we can preserve natural resources for the coming generation because in Sustainable development, the development occurs but without damaging the natural resources or environment. This type of development that is environmental friendly is very necessary in order to provide the natural resources to the next generation safely. It will better the future if widely accepted in the world.

Explanation:

4. formed by extreme heat and pressure

1. formed underground

Answer: Formed underground

Formed by extreme heat and pressure

Explanation:

Answer:

D organelles

Explanation:

Its the actual name for "mini organs" in a cell.

Answer:

Explanation:

plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into gluco

The length of a wave—which could be an electromagnetic wave, a sound wave, or any other wave—is the distance between its crests and troughs. The wave's crest is its highest point, while its dip is its lowest and wavelength.

Thus, Because a wavelength represents a distance or length, it is expressed in length units like meters, centimeters, milimeters, nanometers, etc.

Light's wavelength changes with color, or it differs for each hue. While violet has the shortest wavelength, red has the longest. UV light has a shorter wavelength than violet light. In a similar vein, infrared energy has a larger wavelength than red light.

Frequency and wavelength are inversely proportional. This implies that frequency decreases as wavelength increases. Similar to this, a shorter wavelength results in a higher frequency.

Thus, The length of a wave—which could be an electromagnetic wave, a sound wave, or any other wave—is the distance between its crests and troughs. The wave's crest is its highest point, while its dip is its lowest and wavelength.

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Explanation:

true

I hope this helps u

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Answer:

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In the given scenario, the water will move from cell to the outside, resulting in decrease in cell size. The correct option is A.

If a container has a cell with a 10% salt solution and 90% water, and the outside concentration is 30% salt and 70% water, osmosis will occur.

Osmosis is the movement of solvent molecules (in this case, water) across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

In this scenario, the cell has a lower salt concentration (10%) compared to the outside environment (30%).

As a result, water molecules will move from the area of lower salt concentration (inside the cell) to the area of higher salt concentration (outside the cell) in an attempt to equalize the solute concentration on both sides of the membrane.

Thus, the correct option is A.

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Answer:

Rabies Virus

Explanation:

Answer:

The heart is the pump and the vessels are the delivery and return system for the blood. Every tissue in the body, directly or indirectly, receives oxygen and nutrients from blood supplied by the cardiovascular system. The heart is a muscle. The muscle is a modified form of skeletal muscle called cardiac muscle.

Explanation:

i hope itt help you

Answer:

blood muscles are found