The bottleneck event that decimated the bison was caused by _______.

a. overhunting
b. climate change
c. disease
d. habitat destruction

a neuron..................

Answer:

C) It allows for more genetic diversity of gametes.

Explanation:

Mendel's Law of independent assortment states that alleles cross over to create genetic diversity.

Answer:

Index of refraction is the ratio of the velocity of light in medium to the velocity of light in vacuum.

OR:

Index of refraction is the ratio of the sine of the angle of incidence to sine of the angle of refraction of light propagating from one medium to another.

When the refractive index is greater, the speed of light is greater as it moves from the medium to vacuum.

Answer:

plasma state

Explanation:

Matter in the plasma state has variable volume and shape, but as well as neutral atoms, it contains a significant number of ions and electrons, both of which can move around freely. Plasma is the most common form of visible matter in the universe.

Answer:

The electron transport chain (ETC) is composed of four complexes that bring electrons to oxygen for oxidative phosphorylation. Complex I (NADH dehydrogenase) pumps 4 protons into the intermembrane space. Complex II (succinate dehydrogenase) does not pump any protons into the intermembrane space. Complex III (cytochrome c reductase) pumps 4 protons into the intermembrane space. Complex IV (cytochrome c oxidase) pumps 2 protons into the intermembrane space.

The sensory receptors in the vestibular sacs enable us to maintain our sense of equilibrium by detecting the movement of fluid within them and transmitting this information to the brain. This helps us to stay upright, maintain balance, and navigate through our environment.

Sensory receptors in your vestibular sacs enable you to maintain your sense of equilibrium. The vestibular sacs are situated in the inner ear and are a vital component of the vestibular system that is responsible for maintaining balance and spatial orientation. These small, fluid-filled sacs contain tiny hair cells that are sensitive to the movement of the fluid as we move around.

The vestibular sacs consist of two small pouches, the utricle and saccule. The utricle is located horizontally, and the saccule is oriented vertically. They work together with the semicircular canals to provide sensory information to the brain that is necessary to maintain our balance and spatial orientation.

When we move our head, the fluid inside the vestibular sacs moves in response to the movement, causing the tiny hair cells to bend. This bending of hair cells generates electrical impulses that are transmitted to the brain via the vestibular nerve. The brain uses this information to determine the orientation of the body and the direction of movement.

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Personal Protective Equipment (PPE) refers to specialized equipment and clothing worn to minimize the risk of exposure to various hazards in the workplace or other settings.

PPE is designed to protect the wearer from potential risks that may include physical, chemical, biological, or airborne hazards.

PPE serves as a barrier between the wearer and the potential source of harm, providing a level of protection to reduce the likelihood of injury, illness, or infection.

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The first organ system that shows any sign of activity is the cardiovascular system. This system is responsible for circulating blood throughout the body, delivering oxygen and nutrients to cells and removing waste products.

The development of the heart begins as early as three weeks after conception and by the end of the first month, it begins to beat and pump blood. As the embryo grows, the cardiovascular system continues to develop, with blood vessels forming and branching out to reach all parts of the body. By the end of the second month, the heart is fully formed and pumping blood on its own.

This early activity is essential for the growth and development of other organs and systems, as they require a steady supply of oxygen and nutrients to function properly. In summary, the cardiovascular system is the first organ system to show activity and plays a critical role in embryonic development.

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Answer:

The answer is b

Explanation:

an acid is a compound that donates hydrogen ion

Operating systems do all of the following, EXCEPT:" to "Provide a general-purpose result."

Operating systems are responsible for many tasks, including the reading and writing of data, management of programs, and memory management. However, they do not provide a general-purpose result. So the answer is " Provide a general-purpose result"

To summarize, operating systems are responsible for the following tasks: Reading and writing of data, Management of programs and Memory management: virtual memory, paging, swapping

Therefore, the correct answer to the question "Operating systems do all of the following, EXCEPT:" is "Provide a general-purpose result.

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The principal difference between tropical and temperate rainforests is the amount of precipitation they receive. The statement is false.

Rainforests are classified into two types: tropical and temperate. Tropical rainforests are situated closer to the equator, when temperatures are higher. Temperate rainforests can be found near colder coastal locations north or south of the equator.

The tropical rainforest is a hot, damp ecosystem with year-round rain. It is famous for its lush plant canopies that form three distinct levels. The highest layer, or canopy, comprises gigantic trees that may reach heights of 75 meters (approximately 250 feet).

A vast variety of plants from this level are commonly used as houseplants. These plants adapt quickly to residential surroundings due to the limited quantity of sunshine and rainfall they receive. Wet leaves and leaf litter cover the rainforest's lowest layer or floor.

Due to a lack of sunshine, there are few vegetation on the forest floor. However, the hot, wet environment and all of the dead plant debris offer ideal circumstances for bacteria and other microbes to thrive.

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The efferent arteriole gives rise to the peritubular capillaries which surround the renal tubule.

In the context of kidney function, the efferent arteriole is a small blood vessel that carries blood away from the glomerulus after filtration. It then branches into the peritubular capillaries, a network of small blood vessels that surround and interact with the renal tubule.

The renal tubule is a crucial part of the nephron, the basic functional unit of the kidney. It is responsible for reabsorption and secretion of substances in the process of urine formation. The peritubular capillaries surrounding the renal tubule play a vital role in exchanging substances, such as water, ions, and nutrients, between the blood and the renal tubule, thereby helping to regulate blood composition and maintain proper electrolyte and fluid balance in the body.

In summary, the efferent arteriole gives rise to the peritubular capillaries, which work closely with the renal tubule to maintain overall homeostasis in the body.

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The expulsion of the embryo or fetus from the uterus before the middle of the second trimester is a condition called abortion. It is termination of pregnancy by removal or expulsion of an embryo.

Miscarriage is also that is known as spontaneous abortion which is unintentional expulsion of embryo within the 24 week and the most common cause of spontaneous abortion during first trimester is chromosomal abnormalities of embryo .

The health risk of abortion depend on the procedure is performed safely or unsafely. According to world health organization which is unsafe abortions as those performed by unskilled individuals.There is small diference in safety and efficiency between medical abortion using a combined regimen of mifepristone and misoprostal and surgical abortion in first startiung 3 weeks.

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Answer:

3a- the 1st one

Explanation:

3b- when comparing the genetic codes and looking for differences, the scientists could find the types of mutations that possibly happened, or different changes in the marine snails due to the rise of plastic waste in oceans.

Organisms can adapt to different environments, however, this usually occurs over generations and at the population level. At the level of the individual, an example is mutations, in which the offspring may have different characteristics from the progeny. However, these adaptations of the offspring will either be detrimental or give an advantage depending on the environment in which it is

Because these changes occur gradually over generations, individual organisms cannot increase their fitness on their own. And although there are special cases in which an organism can adapt to environmental changes through a phenomenon called phenotypic plasticity, this is not common in all species and is not due to a genetic change in the individual. Therefore, the answer would be B (sometimes, it depends on where they are located if the adaptation is helpful or not).

All - growth, exchange of gases, excretion, reproduction, and death (option d).

All living organisms undergo various life processes to maintain their existence. Let's analyze each option to determine which life processes are carried out by an organism's cells:

A. Only growth and exchange of gases: While cells are involved in growth and exchange of gases, they also participate in other life processes. This option is incomplete.

B. Only growth, exchange of gases, and reproduction: Cells play a crucial role in reproduction as they are responsible for the production of gametes and the process of cell division. However, there are additional life processes that cells also undertake.

C. Only growth, exchange of gases, excretion, and reproduction: This option includes excretion in addition to growth, exchange of gases, and reproduction. Cells participate in excretion by eliminating waste materials. However, there is one more life process that cells experience.

D. All - growth, exchange of gases, excretion, reproduction, and death: This option encompasses all the mentioned life processes. Cells are involved in growth as they undergo cell division and increase in number. They exchange gases through processes like respiration. Cells excrete waste products. They participate in reproduction through the formation of gametes and cell division. Lastly, cells also experience death as they have a limited lifespan.

Therefore, the correct answer is D. All - growth, exchange of gases, excretion, reproduction, and death.

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Answer:

Ok

Explanation:

Molecules such as proteins, nucleic acids, and carbohydrates have an affinity for water and are called hydrophilic (“water-loving”). Lipids, however, are hydrophobic (“water-fearing”). Some lipids are amphipathic—part of their structure is hydrophilic and another part, usually a larger section, is hydrophobic. Hope this helped

Hypothesis has to do with a tentative explanation of a phenomenon.

The term hypothesis has to do with a tentative explanation of a phenomenon. It refers to the explanation that has been put forward in order to explain an observation.

Now the following are the hypothesis;

Magma leaks up from the mantle below Earth's surface and spreads out, forming a new ocean floor, thereby causing land forms above to move - Falsifiable

The Great Salt Lake is salty due to a high rate of water evaporation in the desert climate - Falsifiable

Magma erupting from the mantle below Earth's surface is hot and fluid in nature - Falsifiable

Floating in the Great Salt Lake in Utah is a lot of fun - Non falsifiable

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Missing parts;

Classify the hypotheses about fluids on Earth as falsifiable or non-falsifiable.

Floating in the Great Salt Lake in Utah is a lot of fun.

The Great Salt Lake is salty due to a high rate of water evaporation in the desert climate.

Magma erupting from the mantle below Earth's surface is hot and fluid in nature.

Magma leaks up from the mantle below Earth's surface and spreads out, forming a new ocean floor, thereby causing land forms above to move.​

If SHH is to be accumulated and then released into cellular space at a specific time, it would be necessary to establish storage mechanisms and release mechanisms.

To store the produced SHH would require specialized cellular compartments.

To release all of the stored SHH, a signal or stimulus would need to trigger the release of SHH from storage into the extracellular space.

SHH is a protein that is stored within the cell and is released into the extracellular space in times of need. These processes need to work in a very regulated way in order to achieve their objectives. For this reason, well-regulated and optimized storage and release mechanisms are needed.

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The given statement “The temperature in # 3 is fresh water's temperature of maximum density” means that the temperature at point 3 has a density of maximum density compared to other points of fresh water. So, the temperature at point 3 is equal to fresh water's temperature of maximum density. Therefore, the answer is option b. equal to.

Water is known as the only substance on earth that exists in all three forms, i.e., solid, liquid, and gas. Moreover, the density of water is also unique compared to other substances. Density is the property of a substance that measures the relationship between the mass and volume of a substance. The density of water varies with temperature and pressure. So, the density of water is always higher than that of gases but lower than most solids.

The density of fresh water at standard atmospheric pressure is around 1000 kg/m³, whereas seawater has a density of around 1025 kg/m³ at the surface. The density of water at different temperatures: Water has a unique density-temperature relationship, meaning the density of water varies with temperature.

At 4 °C, fresh water has the highest density, and as the temperature rises or falls below this point, the density of water decreases. So, water has an anomalous density-temperature relationship. Hence, b is the correct option.

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Answer:

Answer:

If you got a flu shot this year, next year you'll need it again.

Explanation:

This is because the virus changes, usually rendering the previous year's vaccine partly or totally useless. hope this helps you :)

Answer:

A.

Explanation:

Influenza evolves very quickly and its antigens mutate so that your memory cells from the last vaccine won’t recognize it.

The 2020 influenza vaccine was not as efficient because scientists were scrambling to put out a vaccine for Coronavirus. Consequently, Coronavirus cases skyrocketed during the flu season.
Hope this helped!

also.. i have to put coronavirus and not "c0vid-19" because apparently it's too political. lol.

Answer:

so the a goes down and up and then it finds two pretty bestfriends

The basement membrane - It separates epithelial cells from underlying blood vessels, acting as the blood-facing membrane.

The basement membrane is a specialized type of epithelial membrane that is located between the epithelial tissue and the underlying connective tissue.

It serves as a structural support for the epithelial cells.

In the case of the blood-facing membrane, the basement membrane separates the epithelial cells from the underlying blood vessels, acting as a barrier and providing a level of protection.

Therefore, the basement membrane is known as the blood-facing membrane.

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Answer:

D: Simple Diffusion

Explanation:

Diffusion is a transport driven by a concentration gradient.  Gas molecules move from a place of high concentration to an area of low concentration. Knowing when blood is low in concentration and high in carbon dioxide it goes under gas exchange with air into the lungs.

Hope this helped! :)

Answer:

B

Have a nice day :D

Birds conserve energy and reduce wind resistance when they fly in V-like formation.

Flying in a v-like formation allows geese to conserve energy and reduce wind resistance as they migrate. The lead goose breaks the wind for the rest of the group, which allows the other geese to fly more efficiently and use less energy. This group behavior helps the geese to cover long distances during migration, as they are able to fly for longer periods of time without tiring.

The other options do not provide evidence of advantages of this group behavior. Option A) may be true, but it is not specific to flying in a v-like formation. Option C) is not necessarily related to group behavior, as geese may need to move faster for other reasons. Option D) is not relevant to the topic of migration.

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The reactants of photosynthesis are as follows: 6CO2 + 6H2O + Energy.

PHOTOSYNTHESIS:

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Answer: A. 6CO2 + 6H2O + Energy

Proof of validity is shown below.