(S)-Zearalenone, a natural product isolated from the fungus Gibberella zeae, exhibits useful biological activity, including antibiotic properties. In a total synthesis of (S)-zearalenone, an intramolecular Stille coupling process was employed as the penultimate procedure.3 The resulting coupling product was then treated with HCl to cleave the OR groups, thereby converting them into OH groups (as seen in Section 13.6), giving (S)-zearalenone. Draw the structure of (S)-zearalenone:

Explanation:

populations are large, it seems fair to ask whether genetic drift is really all that important. It's true that most populations are large, but they don't necessary act large. Thus, the rate of genetic drift is not really proportional to census population size (Nc). Rather, it's proportional to something more abstract — specifically, the effective population size (Ne). In an ideal population of sexually reproducing individuals , Ne will equal Nc. An "ideal" population has the following characteristics, and most deviations will decrease the effective population size:

There are equal numbers of males and females, all of whom are able to reproduce.

All individuals are equally likely to produce offspring, and the number of offspring that each produces varies no more than expected by chance.

Mating is random.

The number of breeding individuals is constant from one generation to the next.

Essentially, anything that increases the variance among individuals in reproductive success (above sampling variance) will reduce Ne (the size of an ideal population that experiences genetic drift at the rate of the population in question). For example, consider the effect of unequal numbers of mating males and females. In an ideal population, all males and all females would have an equal chance of mating. However, in situations in which one sex outnumbers the other, an individual's chance to mate is now affected by its sex, even if all individuals within each sex have an equal chance to mate. In this situation, effective population size can be predicted by the formula Ne = 4NmNf/(Nm + Nf), where Nm is the number of males and Nf is the number of females. Figure 4 shows the relationship between Ne and Nf in a population of 1,000 mating individuals. In an ideal population, all individuals have an equal opportunity to pass on their genes. In real life, however, this is rarely the case, and Ne is particularly sensitive to unequal numbers of males and females in the population.follow me bye nice study

Answer:

human activities for example the burning of fossil fuels in cars or the clearing of forests for agriculture or development

In some areas, human activity is high for burning fossil fuels so these areas create more carbon dioxide.

Growing concentrations as a result of human activities including burning fossil fuels in vehicles and power plants, and industrial operations.

Destroying forests for development or cultivation may increase carbon dioxide levels because plants consume CO₂ in photosynthesis and during respiration CO₂ released into the atmosphere.

Plants absorb more carbon dioxide via photosynthesis than they emit through respiration throughout the day or in the spring and summer, the amount of carbon dioxide in the air decreases.

Therefore human activities produce more CO₂  by burning fossil fuels some area level is high than others.

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Answer:

Answer

Explanation:

It cause for disasters like lost of crop which causes no food and starvation. It also causes farms to lose money and thus is limiting farming,the citizens,and even the economy .

Answer:

builder A

Explanation:

got it right

Answer:

Builder A

Explanation:

On quizlet

Answer:

A) The fennec Fox is an omnivore.

E) The rock squirrel, spiny lizard and fennec fox are all primary consumers.

Explanation:

Fennec fox is omnivore and they usually live in underground holes. They dig the holes with the help of their feet. They usually consume insects, some plants, eggs and small animals.

Answer:

A) The Fennec Fox is an omnivore.

C) Rock squirrels are the only consumers of Yucca.

D) Producers include Utah Juniper, Yucca, and Pinyon Pine

Explanation:

Using the food web, we do not have any information on what the Northern Whiptail and the Spiny Lizard eat.

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100% correct on usatestprep

Answer:

B

Explanation:

Living Organisms in an ecosystem have a food chain or energy chain. This chain links all organisms within an ecosystem, therefore, answer B "By what they eat" should be the correct answer

Organisms are linked within an ecosystem by their physical adaptations.

so the correct answer is option A.

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Answer:

An individual with the genotype Aa can make two types of gametes: A and a. Since this is a random process, the individual will, on average, make equal numbers of each gamete. (Frequency of 1/2 for each gamete). A second individual with genotype Aa can make two types of gametes: A and a.

Answer:

Environmental change

Explanation:

A species that has little genetic variation cannot evolve (change) in response to variable environmental conditions because genetic variation is the raw material on which natural selection operates to select individuals. Adaptation to changing environmental conditions only can occur when there is variation (either genetic or phenotypic variation). In consequence, a species with low genetic variation is at a high risk of extinction, especially in challenging environments.

Answer:

D. Trimurti

Explanation:

thanks hope it helps

Answer:

Keep its body temperature constant regardless of the environment. its A

Answer:

The plant would not be able to grow to normal height.

Explanation:

If a plant does not develop a root cap, the plant does not allow the root to grow downwards.

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If a plant is unable to produce root caps, the plant will be unable to absorb water from the soil; this is the final option, as root caps are a specialized protective layer at the tip of plant roots that help protect the plants.

The root cap contains cells that are capable of secreting slime, which helps the root to move easily through the soil, helps to maintain the proper orientation of the root tip so it can efficiently absorb water and nutrients from the soil, and acts as a barrier that protects the delicate root tip cells as the root grows through the soil.

Hence, if a plant is unable to produce root caps, the plant will be unable to absorb water from the soil; this is the final option, as root caps are a specialized protective layer at the tip of plant roots that help protect the plants.

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Answer:

It is because of the axis it is on!

Explanation:

In fact, in the Northern Hemisphere, the orbit of the earth takes us further from the sun in summer. Summer is hotter than winter due to the tilt in the axis of the earth of 23 degrees. ... – the sun is higher in the sky, meaning more sunlight shines on the earth more directly.

Answer:

There are three types of heat transfer: radiation, conduction, and convection. Heating and cooling of the fluid, changes in the fluid's density, and the force of gravity combine to set convection currents in motion.

Explanation:

Answer: it’s D

Explanation:

Answer:

I'm confused what's the question???

Answer:

food would probably be the best answer

Answer: Chemical energy is converted to mechanical energy that’s used for muscle movements.

Heat energy is converted to mechanical energy that’s used for muscle movements.

Explanation:

According to the  I law of thermodynamics, energy can neither be created cannot be destroyed but it can only change its form. In the given situation, the energy can only be conserved when it is not lost to the environment. The chemical energy is produced in the body in the form of ATP which is converted into mechanical energy to allow the movement of the muscles during running. So, chemical energy is converted into mechanical energy by this way. The heat energy when directly converted into mechanical energy to induce the movement of muscles the energy will remain conserved and will not lost to the environment.

Answer:

Chemical energy is converted to mechanical energy that’s used for muscle movements.

Heat energy is converted to mechanical energy that’s used for muscle movements.

Explanation:

Answer:

" A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world."

Explanation:

- Eijiro <3

Answer:

C. The mountain has wider range of environments.

Explanation:

Steep mountain habitat have a higher rate of speciation than a large, open grasslands habitat The mountain has wider range of environments.

There are various locations and climates on earth where grassland environments can be found. Depending on where in the world they are and the type of climate there, they may also be referred to as prairies, savannahs, steppes, or pampas.

Because there are few places for animals to hide from predators in grasslands, they have developed underground burrows or grown tall enough to look over thick grasses and shrubs.

Many grasslands have been used for farming because they are suitable for raising crops and providing food for cattle. Yet, this means that grassland animals can no longer reside there.

Therefore,  Steep mountain habitat have a higher rate of speciation than a large, open grasslands habitat The mountain has wider range of environments.

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Answer:

codominance

Explanation:

Big nose could be N and little nose could be n.

Answer:

C. Non point source pollution

Explanation:

Non point source pollution occurs when rain and snowmelt pollute rivers, streams, lakes, marshes, and groundwater. Therefore, option (C) is correct.

A distributed contamination of water or air that does not originate from a single discrete source is referred to as nonpoint source pollution. The presence of this kind of pollution is frequently the result of the accumulation of the effects of smaller amounts of contaminants that have been gathered from a larger area.

Oil, pet waste, pesticides, herbicides, fertilizer, road salt, bacteria, silt, and any other contaminant that ends up on the ground naturally or as a result of human activity are all examples of nonpoint source pollution. Nonpoint source pollution arises from diffuse sources.

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Answer:

50%

Explanation:

Answer:

- The co-worker is wrong, it is indeed possible

- Genetically engineered plants may represent a milestone to alleviate hunger in the world

Explanation:

During photosynthesis, plants use carbon dioxide (CO2) from the air and water (H2O) from soil and rain in order to produce oxygen and glucose, which is a sugar (molecular formula C6​H12​O6). Subsequently, plants release oxygen into the air and store energy (and carbon compounds) in the form of glucose. In consequence, an increase in the photosynthetic rate is directly associated with an increase in both the production of oxygen and glucose. On the other hand, genetically engineered plants can help to reduce hunger in developing countries. In consequence, it is acceptable to develop genetically modified plants as long as contemplating regulatory measures aimed at producing safe products (for example, by avoiding the introduction of genetically engineered genes into wild crop populations).

Answer: cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen

Explanation:

i hope this help

Answer:

In this ELISA procedure, a sample of protein is immobilized in the plastic well and then antibody for this protein added and incubated, and cleared out. In the given setting detection, the antibody is conjugated with the protein of interest and if the substrate molecule added to the reaction it will produce a colored product by reacting with the enzyme.

No reaction will take place in the well in case of not adding secondary antibody or detection antibody to the reaction and no colored product will be received.

Answer:

The correct answer would be - these are the ecological community that shows the interspecific competition.

Explanation:

In this ecological community, both predators lion and leopards are living together and by the given data and information it is evident that they both share the same habitat and they both depend on the same prey for their food.

This cause competition between both lion and leopard for food and habitat. Such competition or interaction is referred to as the interspecific competitions negatively impacted by the presence of the other because they will have less food.

Answer

An ecological community refers to all of the interacting populations in a defined habitat.

Explanation:

see above