The mating of a zebra with a donkey is rare in the wild due to reproductive barriers such as character divergence and gametic barriers, which affect courtship, compatibility of reproductive structures, and potential genetic incompatibilities leading to issues like sterility.
Explanation:It is possible for a zebra to mate with a donkey, and such mating can produce live offspring, known as a zonkey. However, this occurrence is rare in the wild due to various reproductive barriers. One such barrier that would prevent a zebra and donkey from mating in the wild is character divergence, which impacts courtship rituals, potentially leading to differences in female preferences or male behaviors that are incompatible between species.
Other prezygotic barriers include differences in reproductive anatomy or physiology, where the reproductive structures might not be compatible (for example in damselflies), or gametic barriers where the sperm and egg cells are unable to fuse successfully. Postzygotic mechanisms could also be at play, such as genetic incompatibilities that lead to offspring with reduced or no fertility, like mules, which are the sterile offspring of a female horse and a male donkey.
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In procedure b, which tube showed the most digestion of egg albumin? what can you conclude about the ph optimum of pepsin?
Answer:
Following incubation, the most digestion of egg albumin (protein) in exercise "B" occurred in tube 2. This shows that the enzyme pepsin has both a pH optimum (acidic) and a temperature optimum (37C).
What is one virulence factor that differentiates staphylococcus aureus from other species of staphylococci? what is one virulence factor that differentiates staphylococcus aureus from other species of staphylococci? it has a capsule. it produces lipase. it can produce coagulase. it can live on the surface of the skin and in cutaneous oil glands. it produces catalase?
Answer:
B) It can produce coagulase
hope this helps.
People who have intermittent bouts of depression are less likely to get heart disease, atherosclerosis, hypertension, stroke, dementia, osteoporosis, and type ii diabetes.
a. True
b. False
B in my opinión i Believe it could be. What is this for ?
I think the answer is b
"what kind of sand dune appears to be most common in this dune field"
The most common dune form on Earth and on Mars is the crescentic. Crescent-shaped mounds generally are wider than long. The slipface is on the dune's concave side. ... Some types of crescentic dunes move faster over desert surfaces than any other type of dune.
What is the meaning of photosynthesis as example.
Answer:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Explanation:
Plant get food and energy and animal get oxygen.
What transports oxygen in the blood? white blood cells plasma platelets red blood cells
Red blood cells transport oxygen in the blood.
Answer:
red blood cells
Explanation:
If you compared two samples of dna at three different locations in the genome and found they had different lengths of short tandem repeats(e.g. microsateliites.) at each location, what could you conclude?
Answer: please search in wikipedia
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What is the primary benefit of continuing to use non-renewable oil, as opposed to using renewable sources of energy instead?
Burning fossil fuels releases carbon dioxide, which is essentially plant food that will lead to much greater productivity and quality of life on Earth.
It is not possible to run vehicles on renewable fuels, so there is no way to switch from using oil for that purpose even if renewable sources can be used for other things.
Oil is cheap and harmless to people and the environment, so it is an excellent source of energy over the long term and there is no need to develop renewable sources.
The infrastructure for using oil is already in place and there are costs associated with changing the energy infrastructure.
Answer:
The infrastructure for using oil is already in place and there are costs associated with changing the energy infrastructure.
Explanation:
The other options are stating false information.
Hope this helps! :)
Answer: The infrastructure for using oil is already in place and there are costs associated with changing the energy infrastructure.
Explanation:
Use of fossil fuels in considerably cheaper than the costs associated with the new technologies regarding renewable sources as it is very expensive to implement the new technologies and you do not see the benefits initially it takes a lot of time.
Which of the following is found inside a pollen grain?the female gametophyte,the male gametophyte,the megaspore,the sporophyte
Answer:
the male gametophyte
Explanation:
Pollen grains are structures in the seed plants (spermatophytes) which contain vegetative cells but also reproductive cells - microgametophytes. Microgametophytes produce 2 male gametes or sperm cells. Vegetative cells produce pollen tube which is involved in the transfer of sperm cells to the ovule (female structure that forms female gametes). Pollen grains are different in shape, size and color, but all of them are enveloped with hard coat that has protective role.
In pea plants, the trait for tall stems is dominant over the trait for short stems. if two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?
Final answer:
When crossing two heterozygous tall pea plants, the expected percentage of offspring that would be tall like the parents is 75%, as determined by the Punnett square showing a genotypic ratio of 1 TT, 2 Tt, and 1 tt, with only the tt genotype resulting in a short plant.
Explanation:
When two heterozygous tall pea plants (Tt) are crossed, the likelihood of their offspring also exhibiting a tall phenotype can be determined using a Punnett square. A heterozygous tall plant (Tt) crossed with another heterozygous tall plant (Tt) would result in the following genotypic ratio: 1 TT (homozygous dominant), 2 Tt (heterozygous), and 1 tt (homozygous recessive).
Both the TT and Tt genotypes will display the tall phenotype, while the tt genotype will result in a short-stem phenotype. According to the genotypic ratio, we can predict that out of four offspring plants, three (or 75%) would be tall. This is because the 1 TT and 2 Tt plants all express the dominant tall trait. Therefore, the expected percentage of offspring that would have the same tall phenotype as the parents is 75%.
What is the purpose of the pericardial sac that surrounds the heart in mammals
Answer:
Pericardial sac has protective tole
Explanation:
Pericardial sac or pericardium is a fibrous tissue that surrounds the heart. It has two coats:
the outter coat-parietal pericardiumthe inner coat-visceral pericardium or epicardium which is double-layered and contains pericardial fluid between those two layers (pericardial fluid is necessary as a lubricant for the heart movement).Besides lubrication, percardium also protects heart from infections, fixes it and limits its movements.
20pts.
Match these items.
1 pharynx
windpipe
2vein
branch from trachea
3artery
voice box
4 pulmonary
back of throat
5larynx
passageway for food
6esophagus
lower chest muscle
7bronchus
lungs
8trachea
transport of oxygenated blood
9diaphragm
transport of carbon dioxide in blood
Answer:
1-pharynx-back of throat
2-vein-transport of carbon dioxide in blood
3-artery-transport of oxygenated blood
4-pulmonary-lungs
5-larynx-voice box
6-esophagus-passageway for food
7-bronchus-branch from trachea
8-trachea-windpipe
9-diaphragm-lower chest muscle
Explanation:
definitions
Answer:
1-pharynx-back of throat
2-vein-transport of carbon dioxide in blood
3-artery-transport of oxygenated blood
4-pulmonary-lungs
5-larynx-voice box
6-esophagus-passageway for food
7-bronchus-branch from trachea
8-trachea-windpipe
9-diaphragm-lower chest muscle
hope i helped ;]
Explanation:
If a researcher lesions the amygdala of a laboratory rat, the rat will most likely become A) hungry.B) sexually aroused.C) physically uncoordinated.D) less aggressive.E) aphasic.
Answer:
D) less aggressive.
Explanation:
Amygdala is a structure in the brain, part of the limbic system with the role in emotional responses such as aggressive behavior, sexual arousal, fear, but also it is also involved in memory and decision-making.
Stimulated amygdala increase aggressive behavior, while lesions induce opposite effect.
This karyotype is characteristic of children that are also born with mental impairment, slanted eye-lids, a protruding Young’s, heart defects, and small stature. This genetic disorder is
A. Down syndrome
B. Turner syndrome
C. Fragile X syndrome
D. Klinefelter syndrome
Answer:
this would be A
Explanation:
chromosomal syndrome triggered when an error in cell division fallouts in an extra 21st chromosome.
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What substance found in turkey is known for making you sleepy?
amino acid tryptophan
Contrary to popular belief, eating turkey isn't the main reason you feel sleepy after a Thanksgiving feast. The oft-repeated turkey myth stems from the fact that turkey contains the amino acid tryptophan, which forms the basis of brain chemicals that make people tired
How do natural disasters weaken a community’s social infrastructure?
a.
Social systems are unbalanced by the damage caused by natural disasters.
b.
Natural disasters tend to target the poorest members of a community.
c.
The number of natural disasters is increasing across the globe.
d.
Natural disasters can cause billions of dollars in property damage.
Answer:
the correct answer would be D
When you see an attractive person sit down next to you on the bus, the mad pounding of your heart is under the influence of the __________ nervous system?
Answer:
The correct answer is - autonomic nervous system.
Explanation:
The autonomous nervous system is a nervous system part that plays a role unconsciously in the body and maintains the functions of the body such as respiratory rate, urination, heart rate, sexual arousal and digestion, and other unconsciously occurring processes.
ANS is of two types sympathetic and parasympathetic both have opposite roles to each other. Sympathetic ANS are responsible for the increase in the heart rate in the influence of epinephrine and other hormones.
Thus, the correct answer is the Autonomic nervous system.
If a person's heart is pumping 5000 ml of blood in one minute and the heart rate is 50 beats per minute, what is the cardiac output?
Answer:
5,000 mL/min
The cardiac output is 250,000 ml/minute when the heart is pumping 5000 ml of blood in one minute and has a heart rate of 50 beats per minute.
Explanation:The cardiac output is the volume of blood pumped by the heart in one minute. It is calculated by multiplying the heart rate (number of beats per minute) by the stroke volume (volume of blood pumped per beat).
In this case, the heart is pumping 5000 ml of blood in one minute and the heart rate is 50 beats per minute.
Therefore, the cardiac output is calculated as:
Cardiac Output = Heart Rate x Stroke Volume
Cardiac Output = 50 beats/minute x 5000 ml/minute = 250,000 ml/minute
So, the cardiac output is 250,000 ml/minute.
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The graph shows the axis of symmetry for a quadratic function f(x).
Which could be the function?
f(x) = (x + 4)2
f(x) = x2 + 4
f(x) = (x – 4)2
f(x) = x2 – 4
Answer:f(x) = (x-4)^2
Explanation:
Did it on a graphing calculator
We can find the line of symmetry for a quadratic equation using the formula; x = -b / 2a.
What is line of symmetry?The line of symmetry in a quadratic equation is a vertical line that cuts the parabola. The question is incomplete hence the graph is not shown here.
However, the line of symmetry is always a real number such that x = n. We can find the line of symmetry for a quadratic equation using the formula; x = -b / 2a.
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What type of rock does the ocean floor consist of? Igneous basalt rock Igneous granite rock Sedimentary rock Metamorphic rock
Igneous basalt rock
Explanation:The peripheral layer of Earth's lithosphere which is found under the seas and is shaped at spreading focuses on maritime edges, which happen at different plate limit, is called as oceanic crusts.
It is around 6 km (4 miles) thick. It is made out of a few layers, excluding the overlying residue. The highest layer, around 500 meters (1,650 feet) thick, incorporates magmas made of basalt rocks. The oceanic crust is differentiated from the continental crust through certain distinguishing features such as it is more slender, denser, more younger, and of various concoction piece.
Answer:
Igneous basalt rock
Explanation:
Hope it helps!!!
How has technology benefited energy production? A. It has provided for the use of alternate energy sources that have reduced impact on the environment. B. It has allowed for the use of energy sources that are renewable. C. It has allowed for the improvement of existing methods of producing energy. D. All of the above Please select the best answer from the choices provided A B C D
In my opinion and thought I would go with all of above just because so much has benefited from technology and it so happens all of the above has happened
Answer: A. It has provided for the use of alternate energy sources that have reduced impact on the environment.
Explanation:
The technology can be define as the collection of skills, methods and techniques that are required and used for the production of goods and services and to accomplish the objectives of the scientific research.
The major advantage of the technology is the innovation and improvisation of the alternate resources which can be used for the generation of energy. The energy harnessed by these energy sources does not liberate pollution to the atmosphere, biosphere and hydrosphere hence, the quality of the environment remains maintained.
Carbon dioxide diffuses into the ocean carbon cycle via the air-sea surface exchange. Molecules of CO2 enter the ocean by diffusing into the surface waters and dissolving. The amount of CO2 that diffuses and dissolves in the surface water depends on several variables. Scientists have noted that more CO2 diffuses and dissolves in colder sea surface water and less CO2 diffuses and dissolves in warmer water. Let's assume the predictions of scientists predicting a warming climate are true. Can you predict the changes to this model if average ocean temperatures increase as well?
A) Warmer oceans would result in an increase in dissolved CO2. That in turn would result in a shift in the oceans to more photosynthesis, respiration, and decomposition.
B) Warmer oceans would result in an increase in dissolved gases in the oceans. An increase in the CO2 would result in an increase in the rate of photosynthesis of autotrophs found in the oceans.
Eliminate
C) Warmer oceans would mean less dissolved CO2 as well as other gases such as oxygen in the global ocean. Lower CO2 would result in a decrease in photosynthesis of autotrophs living in the oceans.
D) Warmer oceans result in less dissolved CO2 in the oceans and more CO2 diffusing into the atmosphere. The extra CO2 would cause increased global warming, eventually causing a spike in Earth's temperatures and massive extinctions.
C is the correct answer for this one
If ocean temperatures rise, the solubility of the gas, in this case, carbon dioxide (CO2), would decrease and the amount of dissolved CO2 would reduce, pushing more CO2 back into the atmosphere and accelerating global warming. Option D best answers your question based on scientists' understanding of the process.
Explanation:Based on your question, if average ocean temperatures increase due to climate change, the air-sea surface exchange model would undergo significant changes. Scientists have observed that warmer waters tend to drive down the solubility of CO2, thus the amount of dissolved CO2 in the ocean would decrease. Consequently, more CO2 would diffuse back into the atmosphere.
Essentially, the correct answer to your multiple-choice question would be option D: 'Warmer oceans result in less dissolved CO2 in the oceans and more CO2 diffusing into the atmosphere. The extra CO2 would cause increased global warming, eventually causing a spike in Earth's temperatures and massive extinctions.' This prediction aligns with scientists' understanding of the air-sea exchange and the impact of temperature on it.
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Which of the following is the desired outcome of attaching streamers to the back of boats?
Keeping birds from becoming tangled in fishing line
Providing habitat for lobsters
Reducing overall bycatch from drift netting
Removing floating debris from the water
Answer:
removing floating debris from water i do think is the answer if it is wrong i apologize.
Explanation:
Answer:
Keeping birds from becoming tangled in fishing line
Explanation:
There are some birds that take advantage of fishing boats to catch fish from the nets. They submerge at great speed under water. But many times they get caught. This is why streamers are placed, the movement of the streamers with the wind scare away the birds and prevent them from being trapped in the fishing nets.
What is a possible consequence of climate change to species that have a narrow temperature tolerance range? a. extinction b. decreased population c. changes in migratory patterns d. all of the above
Answer:
a. extinction
Explanation:
The species that have a very narrow temperature tolerance are usually species that are very specialized for their environment. These species are the ones that suffer the most if there's changes in the environment, and usually are the first ones to go extinct. If the temperature changes, especially if it happens relatively quickly, apart from the difficulty that species will have with the temperature itself, it will also have huge problems with the quickly changing habitat. The end result will be a quick demise and extinction of the species.
*100% CORRECT ANSWERS
Question 1
Climate warming trends allow plant and insect species to inhabit larger ranges.
True
Question 2
What is a possible consequence of climate change to species that have a narrow temperature tolerance range?
all of the above
Question 3
Which of the following is not a possible effect of rising carbon dioxide levels on plants?
increased plant mortality
Question 4
How does an early onset of spring through climate change affect plants?
their growing and flowering season starts earlier and is longer
Question 5
Environmental factors can cause various changes in ecosystems. Which of the following would most likely have the greatest lasting effect on an ecosystem?
change to the landscape from construction
Question 6
How does change to an ecosystem that results in succession benefit the ecosystem?
it leads to an increased level of biodiversity
Question 7
How do the benefits of natural change to ecosystems compare to the disadvantages?
the benefits outweigh the disadvantages
Question 8
Environmental factors can have various effects on ecosystems. In August 2005, Hurricane Katrina caused significant damage in several states along the Gulf Coast, including Alabama, Mississippi, and Louisiana. Thousands of people were evacuated from their homes due to flooding and other damage caused by the storm. What environmental impact would Hurricane Katrina not have caused?
early onset of spring
Question 9
Rising levels of carbon dioxide most likely
have a greater detrimental effect on the sea
Question 10
Which scenario best describes how climate trends might affect animal migration?
animals found at the equator may move north
If the bark of the trees is dark and the moths that rest there are light, what might happen to the moths
Answer:
They might get eaten
Explanation:
They won't be able to camouflage on the tree
If the bark of the trees is dark and the moths that rest there are light, it is likely that the moths will be more visible to predators while they are resting on the trees.
What happens to light colored moths on dark trees?If the bark of the trees is dark and the moths that rest there are light, it is likely that the moths will be more visible to predators while they are resting on the trees. The contrast between the dark bark and the light-colored moths could make the moths more conspicuous, making them easier to spot by predators such as birds or other animals that prey on moths.
Additionally, the moths may be more vulnerable to being detected by predators while they are resting on the trees because they are not able to blend in with their surroundings as well as they would if they were resting on trees with lighter-colored bark. This could make them more likely to be preyed upon and could potentially lead to a higher mortality rate among the moths.
It is worth noting that this is just one possible scenario and there may be other factors at play that could affect the moths' vulnerability to predators. For example, the presence or absence of other forms of camouflage, the behavior of the moths, and the density of the moth population could all play a role in their vulnerability to predators.
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What statement is true about the functions? Structure 1 is the stamen and Structure 2 is the pistil. Structure 1 is the stem and Structure is the waxy covering. Structure 1 is the pistil and Structure 2 is the fuzzy hair. Structure 1 is the waxy covering and Structure 2 is the stamen.
Answer:
Structure 1 is the stamen and structure is the pistil
Explanation:
Final answer:
The statement that is true about the functions is 'Structure 1 is the stamen and Structure 2 is the pistil.' These structures are central to the reproductive processes of a flower, with the stamen producing pollen and the pistil consisting of the stigma, style, and ovary.
Explanation:
The stamen and the pistil are key parts of a flower's reproductive system. The stamen, which is the male reproductive part, includes the filament and the anther where pollen is produced. The pistil, or gynoecium, is the female reproductive part of the flower, consisting of the stigma, style, and ovary. The stigma serves as the site for pollen deposition and is often sticky to capture pollen effectively. The style is a slender column that connects the stigma and the ovary, enabling the pollen tube to reach the ovary where fertilization takes place. Inside the ovary, ovules develop, which eventually become seeds after fertilization.
This is an uncontrolled fire which destroys forests, jungle, and vegetation as well as animal species that live in the area. These fires spread very easily over large areas and is a source of great habitat destruction.
Answer:
Wildfire
Explanation:
The wildfires are one very devastating occurrence that can appear both naturally and be caused by humans. Naturally these fires occur because of high temperatures and drought, and because of thunders. When they occur, they spread out very quickly and it is an uncontrolled fire. It manages to burn down very large areas of grasslands or forests, moving very quickly and being extremely difficult to put it under control. While the wildfires are very destructive, there's also a positive from them, as they leave behind lot of ashes, and the ashes fertilize the soil, providing the basis for the growth of new vegetation.
Which statements best describe natural selection? Check all that apply. Populations must have genetic variation. Genetic mutations do not produce advantageous traits. Natural selection occurs when the environment changes. Evolution works independently of natural selection. Organisms best suited for the environment survive and reproduce
Answer:
The answers are A, C, E.
Explanation:
My only explanation is I did the question wrong and got the answers...
A) Populations must have genetic variation.
C) Natural selection occurs when the environment changes.
E) Organisms best suited for the environment survive and reproduce.
Natural selection is the process by which organisms with advantageous traits survive and reproduce more successfully, leading to evolution. Genetic variation is necessary for natural selection to occur, and environmental changes can influence the process. Evolution entails shifts in genetic frequencies within a population as a result of differential survival and reproduction.
Explanation:Natural selection is a central concept in evolutionary biology that describes the process by which organisms with traits that better enable them to adapt to their environment tend to survive and reproduce in greater numbers. This process can only occur when there is genetic variation within a population. Mutations are a source of this variation, as they can produce new, advantageous traits that allow some individuals to have a higher rate of survival and reproduction.
However, it is important to understand that not all genetic mutations lead to advantageous traits. Furthermore, for evolution to occur by natural selection, there must be a change in the environment that affects the survival and reproduction of individuals with different traits. This process leads to a shift in phenotypic variations and eventually changes the genetic frequencies within the population.
In summary, natural selection acts on the population's heritable traits, where individuals that are well-suited for their environment are more likely to leave more offspring than those who are less adapted. Over time, this can lead to the evolution of the population as advantageous traits become more common and deleterious alleles decrease in frequency.
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What process causes all stars to glow and produce energy
Answer:
The simple answer is that deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus and generate a tremendous amount of energy at the same time. This process is called nuclear fusion.
Explanation:
Answer:
Explanation:stars shine Because they are extremely hot (like fire gives off light because it is hot) .
The source of this energy is present deep inside the star where the nuclear reactions are taking place.
In most of the stars the hydrogen is being converted into helium ,a process which gives off energy that heats the star
The ph of the water in several lakes in norway and sweden had decreased to below 5.0 due to an increase in acid rain. What is most likely to happen in these lakes?
Answer:
What will most likely happen in these lakes is that there will be a decline of several fish populations. The correct answer is A.
Explanation:
The options attached to the question are given below:
A. The decline of several fish populations
B. An increase in the number of fish.
C. An increase in the number of primary producers.
D. Increased predator- prey relationship.
The fishes, just like any other living organisms has ideal body temperature and pH at which they act best. The ideal pH for fish living in lake water is between 6 and 8. If the pH is reduced below this value then the water will become acidic and this will be toxic for the fish population living in the lakes. Therefore, those fish that can not cope will die and there will be a decrease in the fish populations.
Increased acid rain leading to lower pH in lakes can result in damage to aquatic life due to altered physiological processes, depletion of dissolved oxygen, and increased eutrophication. This creates an inhabitable environment for most fauna, excluding some acid-tolerant species.
Explanation:When the pH of water in lakes decreases to below 5.0 due to an increase in acid rain, several harmful effects are most likely to occur. One of the primary impacts is damage to aquatic life, as most organisms, excluding some acid-tolerant species, can't survive in such acidic conditions. This is because a lower pH can affect metabolic processes and inhibit the survival and reproduction of aquatic organisms. For instance,
fish and shellfish can experience decreased survival rates and altered physiological functions.
Moreover, the increased acidity can lead to the depletion of oxygen in the water body, a scenario that often results in 'dead zones', where the majority of the fauna cannot survive due to insufficient oxygen. Eutrophication, or excessive growth of microorganisms, can also occur, leading to an overall imbalance in the aquatic ecosystem.
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