Unbroken skin poses a substantial barrier to microbes. All of the following contribute to this barrier except _____________.
a. the tightly-packed layer of dead, keratinized cells
b. dryness of the skin
c. complement proteins found in perspiration
d. fatty acids within sebum

Answer:

things that have matter are living things and with matter are nonliving things

An action potential generates local currents that tend to depolarize the membrane immediately adjacent to the action potential.The generation of an action potential is a fundamental concept in neuroscience. The action potential is an essential means of communication in the nervous system since it carries signals over long distances in axons.

An action potential begins with a depolarization of the membrane potential of a neuron or muscle cell that brings the membrane potential closer to the threshold potential that opens voltage-gated sodium channels. An action potential generates local currents that tend to depolarize the membrane immediately adjacent to the action potential. When the membrane potential reaches the threshold potential, voltage-gated sodium channels open and allow sodium ions to enter the cell, depolarizing the membrane further. As the membrane depolarizes, more voltage-gated sodium channels open, leading to a positive feedback loop that drives the membrane potential to the peak of the action potential. At the peak, the voltage-gated sodium channels inactivate and voltage-gated potassium channels open, leading to repolarization of the membrane. Finally, the membrane hyperpolarizes briefly before returning to the resting potential.

The action potential is an essential means of communication in the nervous system since it carries signals over long distances in axons. An action potential begins with a depolarization of the membrane potential of a neuron or muscle cell that brings the membrane potential closer to the threshold potential that opens voltage-gated sodium channels. Voltage-gated channels of sodium and potassium ions are responsible for the conduction of an action potential. When the membrane potential reaches the threshold potential, voltage-gated sodium channels open and allow sodium ions to enter the cell, depolarizing the membrane further. As the membrane depolarizes, more voltage-gated sodium channels open, leading to a positive feedback loop that drives the membrane potential to the peak of the action potential. The threshold stimulus is required to generate an action potential in the neuron or muscle cell. At the peak, the voltage-gated sodium channels inactivate and voltage-gated potassium channels open, leading to repolarization of the membrane. Finally, the membrane hyperpolarizes briefly before returning to the resting potential. Hence, an action potential generates local currents that tend to depolarize the membrane immediately adjacent to the action potential.

An action potential begins with a depolarization of the membrane potential. It is responsible for the conduction of a nerve impulse. An action potential generates local currents that tend to depolarize the membrane immediately adjacent to the action potential.

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Answer:

Answer:

As it got hot and wet, predation pressure from pythons increased the population of marsh rabbits, and they were gone by July.” Higher water levels which allow pythons to swim long distances when searching for food and the fact that pythons feed more frequently when it's hot, are possible reasons for this correlation

Case-control studies are the most important type of study in determining the rare side effects of a drug that occur with long-term usage.

A side effect can be positive or negative. For example, the side effect of doing laser treatment for cataract patients can sometimes improve a person’s eyesight. This is a positive side effect.

A negative side effect or an adverse effect means a side effect that is unwanted or potentially dangerous. The side effects can be due to a medication, surgical procedure, or another kind of intervention.

The negative side effects or adverse effects can vary for everyone. It depends on the general health, the disease, the age of the person, their weight or their gender. Depending on all these factors, the side effects can be mild, moderate, or severe.

Therefore, case-control studies are the most important type of study in determining the rare side effects.

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Answer:

Botany is the branch of biology that deals with the study of plants. Zoology is the branch of biology concerned with the study of animals and the animal kingdom.

The zoological studies deal with the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct. While Botanical research has diverse applications in providing staple foods and textiles, in modern horticulture, agriculture and forestry, plant propagation, breeding and genetic modification, in the synthesis of chemicals and raw materials for construction and energy production, in environmental management, and the maintenance of biodiversity.

Explanation:

Answer: Botany and zoology are two prime disciplines of a much broader field of science called biology. While botany is the study of plants, zoology deals entirely with the study of animals. Nevertheless, both zoology and botany are a vital part of our daily life.

aAnswer:

aa

Explanation:

Answer:

A.

B.

E.

Explanation:

Aerobic respiration will yields 36 ATP molecules and starts with the process of glucose molecules.

The respiration in which glucose molecules produces energy in the form of ATP is called aerobic respiration.

The aerobic respiration produces 36 ATP molecules. Fermentation will produce lactic acid. Aerobic respiration consists of three stages such as glycolysis, ETC cycle.

The conversion of fuel, such as fats and sugars, into chemical energy is known as aerobic respiration. Anaerobic respiration, in contrast, doesn't require oxygen.

Therefore, Aerobic respiration will yields 36 ATP molecules and starts with the process of glucose molecules.

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eukaryotes have nuclei

1. Interpret Graphs: The graph displays the amount of protein digested over time.

2. Analyze Data: To estimate the time it took for half of the protein to be digested, we can look for the point on the graph where the amount of protein digested is half of the maximum amount.

3. Draw Conclusions: If an animal's digestive tract had less of the enzyme pepsin, we would expect the rate of meat digestion to be slower.

1. Interpret Graphs: The graph displays the amount of protein digested over time. As time progresses, there is a clear upward trend in the amount of protein digested. Initially, the digestion rate is slow, but it gradually increases and eventually reaches a plateau.

2. Analyze Data: To estimate the time it took for half of the protein to be digested, we can look for the point on the graph where the amount of protein digested is half of the maximum amount. By visually examining the graph, we can see that this point occurs at approximately 4 hours. Therefore, it took about 4 hours for half of the protein to be digested.

3. Draw Conclusions: If an animal's digestive tract had less of the enzyme pepsin, we would expect the rate of meat digestion to be slower. Pepsin is a crucial enzyme involved in breaking down proteins, particularly in the stomach. With less pepsin present, the digestion process would be impaired, leading to a decreased rate of protein breakdown.

The enzyme pepsin plays a significant role in initiating the hydrolysis of proteins into smaller peptides. Without sufficient pepsin, the protein digestion process would be compromised, resulting in reduced efficiency and slower digestion of meat. This could lead to delayed nutrient absorption and potential digestive issues in the animal.

Additionally, a decreased amount of pepsin would impact the overall efficiency of protein utilization in the animal's diet. It might require the animal to allocate more energy and resources for the digestion process, potentially affecting its overall metabolic efficiency and growth.

In summary, a reduced presence of pepsin in an animal's digestive tract would likely result in a slower rate of meat digestion, potentially leading to inefficient nutrient absorption and affecting the animal's overall metabolic processes.

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loess - a deposit of fine, mineral-rich soil that is good for agriculture

deflation - the process by which wind moves particles that are loose

sand dune - sand deposited against an obstruction

abrasion - the process by which wind wears down solid objects

Plz mark brainliest :)

Answer:

abrasion- the process by which wind wears down  solid objects.

sand dune- sand deposited against an obstruction.

deflation- the process by which wind moves particles  that are loose.

loess- a deposit of fine, mineral-rich soil that is  good for agriculture.

Explanation:

edge 2020

Answer:

C.

Explanation:

To calculate the population density, you will divide the population by the size of the area. Thus, Population Density = Number of People/Land Area. The unit of land area should be square miles or square kilometers. You can use square feet or meters if you are finding the density of a smallish space.

Answer:

a on edge

Explanation:

dont trust c i got it 100%

Answer:

16.  Planting more trees and reducing the use of fossil fuels.

17. The process responsible can be photosynthesis.

18. One possible cause can be fewer photosynthetic organisms OR the increase in human population.

19. The relationship is that as the time increased, the levels of carbon dioxide increased.

Explanation:

These answers are correct 100%!

*Mark Brainliest*

Answer:

false , they are diploid and have 23 pairs of chromosomes

The only cells that do not have 23 pairs of chromosomes are the mature sex cells is a true statement and contains 22 pairs of autosomes and 2 sex chromosome.

Gametes are the haploid cells produced by the reproductive organ, by the process of meiosis, reproductive organ produce the haploid cells.

These gametes are also known as mature sex cells, having haploid set of chromosome, when female gamete and male gamete are fertilized the resultant zygote is diploid.

In human karyotype, they include autosomes and sex chromosome, autosomes are common in both male and female, but in female there are 22 pairs of autosomes and XX are sex chromosome, while in male 22 pairs of autosomes and XY are sex chromosome.

Therefore, the given statement is true.

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Answer:

brown-eyed parents can pass a recessive blue-eyed gene

Explanation:

the blue eyed gene may be "trapped" for a long time, we also  see this outcome in northern africans, they have turkish descent, but still dark skinned (majority), while others have white skin, but both dark/brown parents.

Answer:

c.

Explanation:

c. reproductive isolation

Answer:

He describes basketball as asking him for his “hustle.” Instead, he gave the sport his heart. The speaker worked hard because he wanted to do the game justice. He wanted to show his love for the sport because that's “what you do / When someone makes you feel as / Alive” as basketball made him feel.

Answer:

sorry I just know one 2

Explanation:

A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the head, usually close to the sensory organs for senses such as vision. It is the most complex organ in a vertebrate's body.

Answer:

oxygen gas and cellular respiration :)

(hope it helps) (make it brainliest plz)

Answer:

animals store it in glycogen

plants store it in starch

Organelle found in mitochondrion cells that transforms chemical energy from food into molecules that are easier for cells to utilise.

A mitochondrion is a double-membrane-bound organelle found in the majority of eukaryotic organisms. The mitochondria use aerobic respiration to produce the majority of the adenosine diphosphate (adp), that is used as a source of chemical energy all through the entire cell.

The conventional role of mitochondria is oxidative phosphorylation, which generates ATP utilizing the energy released through the oxidation of the food we eat. ATP serves as the primary energy source for the bulk of biological pathways, including as growth, movement, and equilibrium.

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Based on the analysis of applying iodine to the sample, the correct answer is C. The sample contains starch and starch is stored in ground tissue.

Iodine is an indicator that stains the cell walls of the plant sample and turns blue-black in the presence of starch. Starch is a form of carbohydrate that is stored in the ground tissue of plants. Thus, the sample containing starch is an indication that it is from the ground tissue.

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Answer:

D: There might not be enough food to support the large population.

Explanation:

Of these terms, the one which is a contributing mechanism in the natural selection is mutation, since this is an alteration of a specific fragment of DNA that can produce an organism to have in advantage or in disvantage with regard to other species.

The similarities between amino acids, fatty acids, and sugars include the following below:

This is referred to as a  biological molecule and are substances which are produced by cells and living organisms. Examples include the following:

They all contain carbon atoms present in their molecular structure which is why they are referred to as organic compounds and can be produced by the body through some metabolic reactions.

Food substances serves as a source for these biomolecules as they are usually broken down through enzymatic actions in the process referred to as digestion.

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If you burn dead matter, the overall energy of the storage molecules would decrease because it breaks chemical bonds that contain potential energy.

Chemical energy is a type of potential energy stored in the chemical bonds that form molecules. Burning has the ability to break chemical bonds, thereby relating energy and also decreasing the potential energy stored by the storage molecules.

Therefore, we can conclude that chemical energy is a type of energy stored in the bonds of compounds, which is released by burning and therefore it decreases the energy.

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In the context of molecular biology experiments such as gel electrophoresis, the presence of an uncut band in lane 2 would suggest that the DNA sample in that lane has not been subjected to any restriction enzyme digestion.

Restriction enzymes are used to cleave DNA at specific recognition sites, resulting in DNA fragments of different sizes.

The presence of an uncut band indicates that the DNA in lane 2 has not been treated with a restriction enzyme or that the enzyme did not successfully cleave the DNA.

This uncut band serves as a control or reference point, allowing researchers to compare the size of the DNA fragments in other lanes that have undergone restriction digestion.

It helps validate the success of the digestion process and provides a basis for analyzing the sizes of other DNA fragments.

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