What polysaccharide helps provide the strength to insect exoskeletons?

a action potential forms.

Answer:

an action potential forms

Explanation:

i took the test and i got it right :)

"The Big Bang Theory"

The correct answer to this is:

“Microevolution”

Microevolution is an evolutionary change that occurs to small group of species within a short span of time. The cause of this occurrences are most commonly an external factor. For the case of moth, the soot produced by the Industrial Revolution in the 1800s resulted in trees to darken and other places in England where moths liked to perch. Because of this, light colored moths were more easily identified by predators against a dark background. Dark colored moths had a larger survival advantage since they could blend in against a similarly dark background. Natural selection or microevolution favoured the darker moths, therefore their proportion within the moth population increased.

Microevolution is the right answer.  

Microevolution is the development in allele regularities that befalls over time within a culture. This variation is due to four distinct methods: mutation, adaptation (artificial and natural), gene flow and hereditary drift. This development occurs over a comparatively short span of time than the development takes place under the term macroevolution that is where greater diversity in the community befalls.

Final answer:

The modern atomic model of oxygen incorporates electron configuration, hybridization, and molecular orbital theory to explain the complex bonding and properties of oxygen atoms, highlighting the dynamic nature of electron interactions and molecular structure.

Explanation:

The modern atomic model of oxygen, according to current understanding in Chemistry, is significantly more advanced than the early models of the atom. In this model, oxygen is depicted as having eight protons in the nucleus, surrounded by a cloud of electrons. The electron configuration of oxygen is 1s²2s²2p⁴, which outlines that there are two electrons in both the s orbitals, and four electrons in the p orbitals. However, when oxygen forms covalent compounds, the concept of hybridization comes into play, altering the atomic orbitals into hybrid orbitals that can bond more effectively with other atoms. According to the molecular orbital theory (MO theory), the atomic orbitals of individual oxygen atoms combine to yield molecular orbitals that are delocalized over the entire molecule, such as in O₂. This intricate bonding explains why oxygen has a property called paramagnetism and how electrons are distributed within molecules. Thus, the modern atomic model is characterized by its emphasis on electron energies, probabilities, and molecular interactions, moving beyond static, simplistic representations of atoms to more dynamic and complex ones.

Correct answer: C). Soil Structure

The soil structure refers to the arrangement of the soil into a unit known as soil aggregates. The aggregates consist of solids and porous space. It majorly consists of clay particles, and it may also contain fine particles of sand.

They absorb air pollutants, which dissipate the harmful pollutants. The absorbed pollutants are recycled back into nutrients.

It took approximately 200 years from Robert Hooke's initial observation of cells in 1665 for the scientific community to accept cell theory, thanks to contributions from scientists like Schwann, Schleiden, and Virchow.

After the initial discovery of cells by Robert Hooke in 1665, it took until the 19th century for the scientific community to accept the existence of cells and their significance. It was not until 1839 that two German scientists, Theodor Schwann, a zoologist, and Matthias Jakob Schleiden, a botanist, proposed that cells are the basic unit of structure and function in all living things. Later, in 1858, Rudolf Virchow's observations further contributed to this understanding. Hence, the acceptance of cell theory took approximately 200 years after the first observation of cells by Hooke.

Energy conversion from food molecules to muscles involves a process known as cellular respiration. In this process, the energy stored in glucose, obtained from food, is converted into ATP, a high-energy molecule. ATP powers various cellular processes, including muscle contraction.

Energy conversion from food molecules to muscles happens through a biological process known as cellular respiration. When we eat food, our digestive system breaks down the complex nutrients into simpler forms like glucose. This glucose is transported to cells, including muscle cells, through the bloodstream.

In the cells, glucose undergoes a process called cellular respiration, which occurs in the mitochondria. In a three-step process - glycolysis, Krebs cycle, and electron transport chain - the energy stored in glucose is converted into adenosine triphosphate, or ATP. ATP is a high-energy molecule that powers numerous cellular processes, including muscle contraction.

Hence, it’s through this series of reactions in cellular respiration that the energy from food molecules gets converted and used in muscles.

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The answer is A. at the bottom of a deep lake (Apex)

Answer:

Explanation:

A) At the bottom of a deep lake

I just took the module 3 exam and the answer would be "An area covered by a glacier". :)

Final answer:

To test if an enzyme is completely saturated during an experiment, the reaction rate is measured at different substrate concentrations. If the reaction rate reaches a maximum and does not increase further even with higher substrate concentrations, it indicates the enzyme is completely saturated with substrate.

Explanation:

The presence of complete saturation of an enzyme during an experiment can be determined through various methods. One common method is to measure the reaction rate (velocity) of the enzyme at different substrate concentrations. As the substrate concentration increases, the reaction rate initially increases. However, at a certain point, further increasing the substrate concentration does not result in an increase in the reaction rate.

When the reaction rate reaches a maximum and does not increase even with higher substrate concentrations, it indicates that the enzyme is completely saturated with substrate. This is referred to as saturation kinetics.

By plotting the reaction rate versus substrate concentration, you can observe the point at which the reaction rate plateaus, indicating enzyme saturation.

Food handlers use different cutting surfaces for raw vegetables and raw poultry to prevent cross-contamination, which can spread harmful bacteria. Always practice thorough cleaning to ensure food safety.

Food handlers who cut raw vegetables and raw poultry on different cutting surfaces are taking steps to prevent cross-contamination. This is crucial because bacteria from raw meat, poultry, seafood, and eggs can spread to produce and ready-to-eat foods, potentially causing foodborne illnesses. To avoid this, always use separate cutting boards for fresh produce and raw meats, and thoroughly clean hands, utensils, and surfaces with hot soapy water after each use.

As we know that poaching is an illegal hunting or killing of animals. There are many countries where animals are poached. Poaching of animals happened due to many reasons. Like for an ivory, elephants are poached.

People who poached animals, do not care for them, they just kill or hunt animals for their own benefits. Some people have demand for ivory and some people poached elephants to get ivory. This could lead to over-utilization of animals.

In the IPAT model, technology that improves our ability to acquire resources like minerals, fossil fuels, timber, and ocean fish generally increases the environmental impact because it boosts our capacity to exploit these resources.

According to the IPAT model, technology that enhances our acquisition of minerals, fossil fuels, timber, and ocean fish increases the impact on the environment.

The IPAT equation, which stands for Impact equals Population, Affluence, and Technology, suggests that our environmental impact (I) is the product of population size (P), affluence (A), and technology (T).

Thus, technology that enhances resource acquisition typically does so by increasing our capacity to exploit these resources, thereby increasing the environmental impact.

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