why do pathogens evolve quickly? there are at least four important factors.

The evolutionary mechanism that likely underlies horn length in the bighorn sheep population at Ram Mountain, Canada is natural selection.

Researchers observed a significant decrease in average horn length of rams between 1973 and 1996, which coincided with intense trophy hunting. This suggests that hunters were selectively targeting rams with larger horns, leading to a decrease in the average horn length over time. However, after hunting regulations were implemented in 1996, which increased the minimum horn size for hunting, the number of rams killed decreased, allowing individuals with longer horns to survive and reproduce. This resulted in a rebound in horn length, indicating that natural selection favored individuals with longer horns.

Natural selection is a fundamental mechanism of evolution that acts on heritable traits within a population. In this case, the selective pressure imposed by trophy hunting exerted a strong influence on horn length in bighorn sheep. The initial decrease in average horn length can be attributed to selective hunting of rams with larger horns, as those individuals were more likely to be targeted and killed by hunters. This artificial selection altered the genetic composition of the population, favoring individuals with shorter horns.

However, when hunting regulations were modified to protect rams with shorter horns, the selective pressure was alleviated, allowing individuals with longer horns to have higher reproductive success. Over time, this led to an increase in average horn length as the genetic trait for longer horns became more prevalent in the population.

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A. To ensure compliance with laws and regulations and to pinpoint opportunities for improvement, an environmental audit reviews an organization's performance, policies, and procedures. B. Environmental monitoring is essential for minimizing pollution in companies because it gathers and analyzes data to evaluate environmental parameters and identify pollution sources.

A. As it offers a thorough evaluation of a company's environmental practices and performance, environmental audit is a useful tool in environmental management. Environmental audits also assist businesses in demonstrating their dedication to environmental responsibility and sustainability.

By assisting in the identification of environmental hazards, assisting with compliance efforts, and encouraging sustainable practices inside firms, environmental audit ultimately plays a significant role in enabling continual improvement in environmental management.

B. The data is evaluated to determine any deviations or sources of contamination and to determine the present status of the ecosystem. Industries can identify pollution sources, analyze pollution trends, and assess the efficacy of pollution control methods by monitoring critical indicators.

The use of emission control technology, the optimization of production processes, and the adoption of pollution avoidance methods are all examples of proactive pollution mitigation actions that are made possible by environmental monitoring in the business world. It enables businesses to follow environmental laws, reduce their ecological impact, and stop or lessen the discharge of hazardous materials into the environment.

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Protein concentration is the component that has a much lower concentration in cerebrospinal fluid (CSF) than in cerebral capillary blood. Option D is correct.

Cerebrospinal fluid (CSF) is the clear, colorless fluid which surrounds the brain as well as spinal cord. It plays essential roles in providing mechanical protection, buoyancy, and nutrient supply to the central nervous system. CSF is derived from plasma (the liquid component of blood) through a specialized barrier called the blood-brain barrier.

The blood-brain barrier limits the movement of various substances, including ions and large molecules such as proteins, from the bloodstream into the CSF. It is highly selective and tightly regulates the composition of CSF to maintain optimal brain function.

Hence, D. is the correct option.

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Receptive field is a region where sensory neuron detects stimuli within an area.

The receptive field of a neuron is the part or region in any organ system within that help to in stimulation of neurons which can affect the the electrical response of the neursons.

Examples of receptive field are found in cochlea of auditory system, visual system, skin, tongues and so on.

Therefore, Receptive field is a region where sensory neuron detects stimuli within an area.

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answer: I need the picture if it gave you one, in order to find the answer

Answer:

The 200kg

Explanation:

Because 400kg is more weight and the 200kg would be much easier to push

Answer:

D. D. before cells without a true nucleus

Explanation:

Answer:

''Genetic variation occurs from changes in homologous chromosomes  during meiosis''.

Explanation:

''Genetic variation occurs from changes in homologous chromosomes''. Genetic variation occurs from a number of techniques such as mutation, random mating, random fertilization, and recombination between homologous chromosomes during the process of meiosis. meiosis is a type of cell division which occurs in the sex cells of the organisms which is responsible for the variation in the body of organisms.

the mutation rate of the achondroplasia gene in this population is 8.50 × 10⁻⁵

It is Given that Achondroplasia is an autosomal dominant disorder,

The total births = 94075,

Dwarfism achondroplasia affects ten infants.

The parents of two infants are also dwarfs. As a result, they passed on this condition to them.

Dwarfism caused by achondroplasia is an autosomal dominant condition. Therefore, those who inherit them from their parents must also have dwarf parents; those who do not have dwarf parents are the result of an achondroplasia gene mutation.

Infants having achondroplasia because of mutation = 10 - 2 = 8

8 infants have the achondroplasia gene mutation.

mutation rate = Infants with gene mutation / Total Infants

mutation rate  = 8 / 94075 = 0.0000850 = 8.50 × 10-5

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Answer: b

Explanation:

Mia can organize the elements by level of organization as individual organisms (frogs, turtles, birds, squirrel, snake), populations (group of each species), communities (grasses, shrubs, wildflowers, rocks, algae, water plants), and ecosystem (including the stream and all the components mentioned).

One way Mia can organize these elements by level of organization is by utilizing the ecological hierarchy or levels of ecological organization.

This hierarchical framework allows for the classification of living and non-living components based on their organizational complexity and interactions.

Starting from the simplest level to the most complex, Mia can organize these elements as follows:

By organizing these elements using the ecological hierarchy, Mia can appreciate the interconnections and interdependencies among the different levels of organization within the park's natural environment.

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The primary functions of whales include feeding, reproduction, communication, and migration.

Whales are primarily filter feeders or predators, depending on the species.

Filter-feeding whales, such as baleen whales, have baleen plates in their mouths that allow them to filter out small prey, such as krill or small fish, from large volumes of water.

Predatory whales, such as toothed whales, hunt and feed on various marine organisms, including fish, squid, and marine mammals.

Reproduction is another important function for whales. Most whale species have a gestation period of several months, with females giving birth to a single calf.

The calves are nursed with milk from their mothers and rely on their care for a period of time until they become independent.

Communication is vital for whales, as they rely on vocalizations to communicate with other members of their pod.

Whales produce a variety of sounds, including songs, clicks, and whistles, which serve purposes such as mating, social interactions, and navigation.

Migration is a common behavior observed in many whale species. Whales undertake long-distance migrations, often covering thousands of kilometers, to reach feeding grounds in nutrient-rich waters or to reproduce in specific breeding areas.

These migrations are driven by seasonal changes in food availability and environmental conditions.

In summary, the primary functions of whales encompass feeding, reproduction, communication, and migration, all of which are essential for their survival and successful adaptation to their marine environments.

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Answer: Biodiversity is the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem levels. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity.

Explanation:

Answer:

The variety of life in the world or in a particular habitat or ecosystem. (It is a noun).

Explanation:

Answer:

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Explanation:

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Answer:

Tt jsjwisjsnanjqkqw aahwhza

Answer:The first part of photosynthesis is the light-dependent reactions. Water is necessary for these reactions because it is split by an enzyme within the thylakoid membrane. This splitting of water releases electrons, hydrogen ions, and oxygen.

Explanation:

Answer:

The correct order of protein production is:

c) 1,2,4,3

Ribosome: Protein synthesis begins in the ribosomes, which are located either in the cytoplasm or attached to the endoplasmic reticulum.

Endoplasmic Reticulum: After the initial stages of protein synthesis in the ribosomes, the newly synthesized protein is transported into the endoplasmic reticulum (ER) for further processing and modification.

Golgi Apparatus: The proteins synthesized in the ER undergo further processing and modifications in the Golgi apparatus. This includes sorting, packaging, and modifying the proteins to their final functional forms.

Secretory Vesicles: Once the proteins are properly processed and modified in the Golgi apparatus, they are packaged into secretory vesicles. These vesicles transport the proteins to their destination, such as the plasma membrane for secretion outside the cell.

Therefore, the correct order is 1, 2, 4, 3.

Answer:

The correct order of protein production is ribosome, endoplasmic reticulum, Golgi apparatus, and secretory vesicles. So the correct answer would be c) 1,2,4,3.

Many proteins destined for the endoplasmic reticulum, the Golgi apparatus, lysosomes, the plasma membrane, and secretion from the cell are synthesized on ribosomes that are bound to the membrane of the endoplasmic reticulum. The Golgi apparatus then distributes these proteins and lipids that it receives from the ER.

Answer:The rabbit is the primary consumer.

Explanation:

While a cell is at rest, its resting membrane potential (RMP) is the difference in electric charge between the inside and exterior of the cell. Many cell types have varying normal RMPs, although neurons generally have one about -70 millivolts (mV).

There are a number of circumstances where the RMP can drop below average (i.e., becoming more negative), including: Hyperkalemia: The RMP may turn more negative if extracellular potassium levels rise (hyperkalemia).

This is due to the fact that potassium ions prefer to diffuse out of the cell, and an increase in the concentration gradient caused by an external potassium concentration rise might result in a net outflow of potassium ions and a greater negative RMP.

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Correct Question:

Under What conditions might the resting membrane potential become lower than normal?

The materials commonly stored by bacteria for future metabolic needs include glycogen, elemental sulfur (S0), and polyhydroxybutyrate (PHB).

Glycogen is a polysaccharide that serves as a storage form of glucose. Bacteria can accumulate glycogen as a reserve energy source to be used when other energy sources are limited.

Elemental sulfur (S0) can be stored by certain bacteria as a reserve of sulfur for use in metabolic processes. These bacteria can oxidize sulfur compounds and store the elemental sulfur in granules within their cells.

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Answer:

i think it's a hexose because it's similar.

Answer:

Epidermis

Explanation:

The Epidermis is the one-and-only layer of the skin that gets damaged in the first-degree burn. Another thing about the Epidermis is that it's just dead skin cells, they're not actually alive. But they protect your skin really nicely!

Thanks!

MiniMeteorologist

reasoning............

The disorder that hinders insulin from getting glucose into cells and disables the body from properly using digested food needed for development and energy is diabetes mellitus.

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The pictures are shown for pathogens which are harmful to human body and 1st is virus 2nd is fungus 3rd is protozoa and 4th is bacteria.

Explanation: There are many pathogens that are harmful to people and they are harmful because they use the host machinery to replicate themselves and grow and also damages the host machinery and lyse the cell which in turn reduces the immunity of the host body and also make the host body prone to diseases leading to the early death of host or miserable life.

These pathogens are bacteria, protozoa, fungi, and viruses.

Virus - The viruses are considered as non-living or living depending upon whether they are outside the host cell or inside it as it they are outside they are nonliving and if inside they are living and have genetic material RNA or DNA and a protein coat called capsid.

Bacteria - The bacteria are also unicellular organisms which are prokaryotes and have a cell wall made up of peptidoglycan and can be divided in gram negative and gram-positive bacteria for example Xanthomonas.

Fungi - The fungi are multicellular organisms and have mycelia which is a thread-like structure in the form of a network called hyphae and they produce a different types of spores for their development.

Protozoa - They are microscopic and unicellular organisms and are eukaryotic in nature having complex structure and have complex metabolism and also have cilia for their movements.

So according to this 1st is virus 2nd is fungus 3rd is protozoa and 4th is bacteria.

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Answer:

B. the study of matter and how it changes

Explanation:

Answer:

matter

Explanation:

"In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings"

Answer:

In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings

Explanation:

It doesn't exchange matter

Answer: Lytic, because of the quick onset of symptoms after infection

Explanation: As seen in the question above, the SARS virus tends to develop symptoms very quickly when it is infecting a person. This speed in the development of symptoms is a characteristic of the lytic cycle, in relation to the reproductive cycle of viruses. This is because in the lytic cycle, a virus can infect many cells at once, which accelerates the development of the disease. This cycle allows the virus to use all of the cell's biological machinery to reproduce more copies of the virus. When these copies are ready, the virus causes the destruction of the host cell and the release of new viruses to other cells, where the whole process will be repeated. This is all done very quickly.

The lysogenic cycle does not cause the rapid infection of thousands of cells, since it is necessary that there is an adaptation between the DNA of the cell and the DNA of the virus. This slows down the infection process and, therefore, symptoms appear more slowly.

Answer:

number of protons is the correct answer

Answer:

number of protons is the correct answer.