Why is nonpoint source pollution difficult to control? (Site 2)
What is a riparian zone?
A. A zone of vegetation that borders a stream or river
B. A river that is man made
C. A river basin that flows into the ocean
D. None of the above
Answer:
I believe it is, A) a zone of vegetation that borders a stream or river.
How does a closed system like a nuclear submarine differ from our terrarium?
Gram-negative bacterial cell walls can increase a bacterium's virulence (infectious capability) because a component in the cell wall acts as a toxin. True or false
Answer: false
Explanation its function is to protect them from acids and also in some cases reproduction but they itsef didnt have any toxins in them
Which of the following statements regarding lipid bilayer is true?
A. The lipid bilayer is flexible and are not able to bend.
B. The hydrophobic molecules are polar and form favorable interactions with water.
C. A typical membrane lipid molecule has a hydrophilic head and are amphoteric.
D. The membrane phospholipids are nonmotile.
E.
The most abundant lipids in cell membranes are phospholipids.
What are the four modern-day phyla of gymnosperms?
Answer:
Gymnosperms consist of four main phyla: the Coniferophyta, Cycadophyta, Gingkophyta and Gnetophyta.
Conifers are the dominant plant of the gymnosperms, having needle-like leaves and living in areas where the weather is cold and dry.
Cycads live in warm climates, have large, compound leaves, and are unusual in that they are pollinated by beetles rather than wind.
Gingko biloba is the only remaining species of the Gingkophyta and is usually resistant to pollution.
Gnetophytes are the gymnosperms believed to be most closely related to the angiosperms because of the presence of vessel elements within their stems.
Melanie is researching whether some dinosaurs had feathers. She read the following paragraph in an article.
Evidence from various scientific disciplines suggests that certain types of dinosaurs, namely those that fall within the clade Therapoda, may have
had feathers. Theropod dinosaurs share many features with modern birds, including three-toed limbs, scales, hollow bones, and the number of
holes in their skulls. Both laid eggs, and both breathed in the same way, which is very different from the way that most terrestrial animals breathe.
These features, and a number of fossil finds, suggest that birds are modern-day descendants of dinosaurs.
Based on the paragraph, what would be the best way for Melanie to narrow the focus of her research?
While researching the question of whether dinosaurs had feathers, Melanie decided to focus on
A. The animals that came before the dinosaurs and may have led to both dinosaurs and birds.
B. The differences in the way dinosaurs in mammals breathe.
C. Theropod dinosaurs in the connection do birds.
D. Egg, laying animals, and how they relate to birds.
While researching the question of whether dinosaurs had feathers, Melanie decided to focus on
C. Theropod dinosaurs in the connection do birds.How to find the correct optionThe paragraph implies that specific dinosaurs, belonging to the Theropoda group, could have potentially had feathers and revealed comparable traits with modern avians.
Consequently, Melanie's research would be best served delving further into the relationship between these Theropod dinosaurs and birds.
Alternative A neglects to establish any correlation between feather existence in dinosaurs, while alternative B has no significance as a determining factor for establishing dinosaur plumage. Although option D does possess some relevance, it fails to specifically address the crucial link connecting Theropod creatures with their avian counterparts.
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Answer: its D egg laying animals and how they relate to birds
Explanation:
What information can a scientist learn directly from a single fossil?
A. How many offspring the organism produced
B. The organism's shape and size
C. How the organism is related to others
D. The life expectancy of similar organisms
Answer:
B. The organism's shape and size.
Explanation:
A single fossil can provide information about the shape and size of the organism that it belonged to. Fossils can also provide information about the age of the rock layer in which they were found. However, it is usually difficult to determine other characteristics such as how many offspring the organism produced, its relationships to other organisms, or the life expectancy of similar organisms from a single fossil. These types of information often require the study of multiple fossils or the use of other scientific methods.
What is the phenotype for the female mouse
Answer:
Behavior, biological features, color, form, and size are a few examples of visible traits.
Explanation:
All of an organism's observable traits, or phenotype, are the outcome of the interplay between its genotype (total genetic inheritance) and environment.
Describe at least two challenges that cactuses had to overcome that cattails did not.
Answer:
Possible challenges include: Climate: Deserts are arider than swamps, so there is less humidity in the air and less water in the soil. Reproduction: Cactuses are often not densely populated, whereas cattails occur in groups.
Marine iguanas are large lizards that live in the Galápagos Islands. They feed on algae growing on rocks at the edge of the sea. When an El Niño event occurs, the sea around the islands becomes warmer, and the algae do not grow as rapidly as they do during typical temperatures. Scientists studied the relationship between the size of male iguanas on one of the Galápagos Islands and their survival during typical temperatures or during and El Niño event. The data are shown in the graph. Based on the data, identify which size make iguanas are most affected by an El Niño event and explain the most likely cause for this size of male iguana to be affected more than other sizes.
1. The larger male Iguana are most affected by the El Nino event since it is only those above 36 cm had a massive decline in population.
2. The most likely cause of why the larger males were more affected by the El Niño event is their inability to meet their food or body requirment. Larger iguanas need more algae to sustain their body size and maintain their metabolism. When an El Niño event occurs, the reduced algae growth makes it difficult for these larger iguanas to find enough food.
What is El Nino event?
El Niño happens around the Pacific Ocean area. It is known to happen every two to seven years.
When an El Niño event happens the normal trade winds is reversed. This can cause warm water to move towards the eastern Pacific.
El Niño events can also affect ocean currents and marine life. The event can lead to fishery reduction and coral bleaching.
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What combination of processes can transform a metamorphic rock to sediments?
a.
erosion, crystallization, and melting
b.
heating, pressure, and lithification
c.
melting, crystallization, and compaction
d.
exposure, weathering, and erosion
Option D Exposure, weathering, and erosion is the correct answer. It is the combination of processes that can transform a metamorphic rock into sediments.
Metamorphic rocks are shaped by the change of pre-existing rocks (molten, sedimentary, or other metamorphic rocks) through warm, pressure, and/or chemical forms. To convert a metamorphic rock to sediments, the rock ought to be uncovered to the surface and experience weathering and disintegration forms.
Exposure alludes to the method of bringing the transformative rock to the Earth's surface. This could happen through structural elevations, disintegration of overlying rocks, or volcanic action. Once the rock is uncovered, weathering processes break down the rock into littler parts or sediments. This may happen through physical or chemical weathering, such as the activity of water, wind, ice, or chemical responses with air or water.
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Amoeba Sisters Video Recap: Ecological Relationships
Sketch a predator and prey graph as demonstrated in the video.
How are the predator and prey graph lines related to each other?
(I don’t have a picture)
Answer: I have not seen this video, but I hope my input can somewhat help. :)
A predator-prey dynamic tries to maintain balance in the populations of both species. The line in Figure below illustrates this. There is more food for predators as the number of prey rises. Thus, after a brief delay, the carnivore population also rises.
Explanation:
The relationship between the predator and prey graph lines can be shown graphically as a series of peaks and troughs that correspond to fluctuations in the population sizes of the predators and prey.
How are the predator and prey graph lines related to each other in a predator and prey graph?In a predator and prey graph, the predator and prey graph lines are typically related to each other in a cyclical pattern.
As the population of prey increases, the population of predators that feed on them will also increase, leading to a subsequent decrease in the population of prey due to predation. This decrease in prey population will then cause a decrease in predator population, as there is less food available for them.
This, in turn, will allow the prey population to recover and the cycle will repeat itself.
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Please helpppppppppppppp
List and describe 5 evidence of evolution
Answer:
Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos
Which of the following explains why artificial selection is described as artificial?
It is the opposite of natural selection, in which organisms adapt to their environments without human intervention.
It alludes to the process of artificial insemination, a process of unnaturally planting a fertilized egg.
It deals with synthetic or superficial genes and traits like color, markings, size, and speed.
It is the label used to show which animals have been given hormones and artificially-made nutrients.
Answer:Likely option 1
Explanation:Natural selection is selects for individuals with traits of increased relative fitness (fitness= ability to produce viable offspring) Artificial selection is when people select for a desired trait.
None of the choices above are great...
first option: likely the best choice by process of elimination
second option: Artificial selection doesnt necessarily have to involve artificial insemination, though it can
3rd option: traits like color, markings, size and speed are not generally superficial... traits of color, markings and physical fitness (size/speed) often increase fitness in regards to sexual selection
The final option is simply false
what do you think will be the effect to one's life if one of the digestive processes will not take place?
Answer:
It will cause constipation and so can cause absurd swelling of the stomach
Help me please ok it will help me
Answer:
25,000 Or C
Explanation:
Please don’t give me more than 5 point I like to help
Which list of ordered pairs would form a parallelogram when connected by the line segments
According to the information, the correct answer is: (1, 5), (3, 2), (3, –2), (–2, –3)
Which list of ordered pairs would form a parallelogram?To determine if a set of ordered pairs forms a parallelogram, we need to check if the opposite sides are parallel and of equal length.
For the first set of ordered pairs, we can see that the line segment connecting (1, 5) to (3, 2) is parallel to the line segment connecting (3, -2) to (-2, -3). Moreover, the distance between these two line segments is the same. Therefore, this set of ordered pairs forms a parallelogram.
For the second set of ordered pairs, we can see that the line segment connecting (-2, 2) to (-5, -2) is parallel to the line segment connecting (-4, -5) to (-1, -1). However, the distance between these two line segments is not the same. Therefore, this set of ordered pairs does not form a parallelogram.
For the third set of ordered pairs, we can see that the line segment connecting (3, 2) to (5, -2) is not parallel to the line segment connecting (-3, -2) to (-1, 2). Therefore, this set of ordered pairs does not form a parallelogram.
For the fourth set of ordered pairs, we can see that all the ordered pairs are the same, which means that we only have one point. Therefore, this set of ordered pairs does not form a parallelogram.
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What's the best answer to the question is cholesterol important for the function of the cell membrane? Why or why not?
Cholesterol is important for the cell membrane. It is a protein which allows it to sit in the phospholipid bilayer and keeps the layer moving in extreme cold. It can also slow down the movement of the layer in extreme heat. This ability allows membrane transport and osmosis to occur regardless of environmental factors and the cell would die without this ability.
Cholesterol is not important for the cell membrane. It is a sterol which allows it to sit in the phospholipid bilayer and stops the layer from moving in extreme cold. It can also increase the movement of the layer in extreme heat. This sterol has no effect on membrane transport or osmosis regardless of environmental factors and the cell would not die without this ability.
Cholesterol is not important for the cell membrane. It is a protein which allows it to sit in the phospholipid bilayer and keeps the layer moving in extreme cold. It can also slow down the movement of the layer in extreme heat. This protein has no effect on membrane transport or osmosis regardless of environmental factors and the cell would not die without this ability.
The cholesterol is important for the function of the cell membrane because cholesterol is important for the cell membrane. It is a protein which allows it to sit in the phospholipid bilayer and keeps the layer moving in extreme cold.
Cholesterol is any of a class of certain organic molecules called lipids. It is a sterol, a type of lipid. Cholesterol is biosynthesized by all animal cells and is an essential structural component of animal cell membranes.
Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease.
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since the new strand made of short segments of RNA nucleotides, has a free 3'end what can attach and add nucleotides
DNA polymerase can attach and add nucleotides to the free 3' end of a new RNA strand made of short segments of RNA nucleotides during DNA replication.
RNA primase first adds a short RNA primer to the 3' end of the template strand, which serves as a starting point for DNA polymerase to attach and add nucleotides in a 5' to 3' direction. DNA polymerase can only add nucleotides to the free 3' end of the RNA primer or an existing DNA strand. Once the RNA primer is replaced with DNA nucleotides, the lagging strand can be joined to the leading strand through DNA ligase.
This process of DNA replication is semi-conservative, meaning that each new double-stranded DNA molecule is composed of one parent strand and one new daughter strand. This mechanism of DNA replication ensures the accurate transfer of genetic information from parent to daughter cells during cell division.
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How does auxin affect growth in (include a diagram)
1. Shoots
2. Roots
Auxin is a class of plant growth hormones which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.
Auxin is a plant hormone responsible for plant cell elongation, cell differentiation, cell division and healing in vascular cells, timing the growth of flowers, and general balanced growth of the entire plant.
Auxins affect plant growth in different ways. In shoots, the accumulation of auxins in the cell signals cell elongation. Whereas, the accumulation of auxins in plant roots signals the cells to not grow.
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9. Re-center the slide and change the scope to high power. You will notice the "e" is
out of focus. DO NOT touch the coarse focus knob, instead use the fine focus
(small knob) to resolve the picture. Draw the image you see of the letter e (or part
of it) on high power.
The fine focus knob should be used to adjust the focus of the image. This can be done by slowly turning the knob until the image of the letter "e" is in focus and the details of the letter become visible. diagram is attached.
What is focus?Focus is the act of concentrating on one idea, activity, or task. It requires an individual to block out all other distractions and use their mental energy to focus on one particular goal or objective. Focus allows an individual to explore a topic in greater detail and enhances their ability to retain information. It also enables them to discover new perspectives and to think critically and deeply about the subject. Focus is an essential part of any successful person’s life, and it can be developed through practice and dedication. By learning how to focus and practice this skill, an individual can improve their overall productivity and be more successful in life.
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(a) What is the definition of a motor unit? (b) What is the structural and functional difference between a large motor unit and a small motor unit? Can you give an example of each? (c) Why is the neurotransmitter acetylcholine degraded after binding to its receptor?
Answer:
Explanation: A. motor units, defined as a motoneuron and all of its associated muscle fibers
B. Small α motor neurons innervate relatively few muscle fibers and form motor units that generate small forces, whereas large motor neurons innervate larger, more powerful motor units.
C. no excess of acetylcholine remains in the synaptic cleft to cause the continuous activation of receptors
Please give me a brainly.......
How would you expect a Species Survival Plan to affect the crested toad
population in Puerto Rico?
A. It would lead to the extinction of crested toads due to water
pollution.
B. It would lead to the successful reintroduction of crested toads into
the wild.
OC. It would cause most crested toads to die due to invasive species.
D. It would cause the death of some crested toads due to habitat
loss.
It would lead to the successful reintroduction of crested toads into the wild. The correct option is B
What is Species Survival Plan ?
A Species Survival Plan (SSP) is a program designed to manage and conserve the genetic diversity of endangered or threatened species in captivity.
Therefore, Option B, "It would lead to the successful reintroduction of crested toads into the wild," is the most likely outcome of a Species Survival Plan for the crested toad population in Puerto Rico. While there may be challenges such as invasive species and habitat loss that could impact the success of the reintroduction efforts, the goal of the SSP is to help increase the population of the crested toad and prevent their extinction.
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can someone help with this please? there was a video attached to this.. (it’s not that long at all but i’ll out the link in the comments incase anyone may need it) you also have to look at the previous question i posted yesterday to answer/understand this someone answered it already btw but just look at what they said and look at this
Maintaining a balance between the populations of kelp, otters, and urchins is important for the health and sustainability of the kelp forest ecosystem.
What is the carrying capacity of the kelp forest ecosystem?In a kelp forest ecosystem, kelp, otters, and urchins have a complex relationship. Kelp is the primary producer in the ecosystem and provides habitat and food for many organisms.
Otters are the primary predator of sea urchins, which are herbivores that feed on kelp. When otters are present in the ecosystem, they control the urchin population, allowing kelp to thrive. However, when otter populations decline, the urchin population can increase and overgraze the kelp, leading to a decrease in kelp abundance.
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a) What are the bases of mRNA coded for by this section of DNA, before the
mutation? Hint: In RNA, A pairs with U.
Answer:
DNA, before the
mutation? Hint: In RNA, A pairs with U.
Describe how impluses are transmitted across the synapse
Answer:
1) An electrical impulse travels along an axon of the presynaptic neuron.
2) When the impulse reaches the nerve-ending, it releases chemical messengers called neurotransmitters.
3) These chemicals diffuse across the synapse and bind with specific receptor molecules on the membrane of the next neuron.
Hope this helps :)
Pls brainliest...
A gene found in naturally occurring soil bacterium, Bacillus thuringiensis (8t), contains a protein that kills certain insects. Scientists
have genetically modified certain organisms such as corn, potatoes, and cotton by introducing the Bt gene into their DNA in order
for these plants to have this desired trait. Which question were the scientists most likely trying to answer?
A. How can farmers produce more nutritional crops?
B. How can farmers use less insecticides on their crops?
C. How can farmers reduce the amount of land needed to grow their crops?
D. How can farmers reduce the amount of fertilizers they apply to the soil for
their crops?
Answer:
B. How can farmers use less insecticides on their crops?
Explanation:
The scientists were most likely trying to answer question B, "How can farmers use less insecticides on their crops?" The Bt gene from Bacillus thuringiensis produces a protein that is toxic to certain insects, making the plants resistant to insect pests. By introducing this gene into crops, farmers can reduce the need for chemical insecticides, which can be harmful to the environment and human health. This approach is an example of genetic engineering for pest control, which has the potential to increase crop yields while reducing the use of harmful chemicals.
Will give brainliest. I need help with this project please!
For this activity, you will design and describe a new outer planet. You must answer a series of questions and describe your planet in detail. Once all questions have been answered, you will create a scientific journal entry from the point of view of another astronomer discovering your planet. This journal entry must include all of the answers to the questions, but should be written as if these details are being discovered for the first time.
1. How many AU is your planet from the Sun?
2. Does your planet have a solid surface or is it a gas giant? If it has a solid surface, give the details.
3. Describe the atmosphere.
4. Describe the color(s).
5. Does your planet have rings? If so, are they massive like Saturn’s or almost unnoticeable like Jupiter’s?
6. Does your planet have any moon? If so, how many?
7. How many degrees does your planet tilt?
8. What is the diameter of your planet (in miles)?
9. How long is one full rotation of your planet? (in minutes, hours, Earth days, or Earth years)?
10. How long does it take for your planet to complete an orbit around the Sun (in Earth years)?
Step 2: Write a Scientific Journal Entry
Now it’s time to “discover” your planet! Use your answers to the questions in Step 1 to help you describe the planet in detail. They do not have to be described in the same order as the questions were listed; they can be mixed up to reflect how an astronomer might slowly learn about a planet’s components and aspects. As this journal entry is written from the point of view of the “discoverer” of the planet, you must include the name of the planet and explain why you chose that name. Your journal entry must be at least two paragraphs long.
Your answers to the 10 questions (step 1)
Your journal entry describing your “discovery” (step 2)
You must include the name of your planet and explain why you chose that name
Your journal entry must be at least two paragraphs long
Answer:
1. My planet is located 15.6 AU from the Sun, making it one of the farthest planets in our solar system.
2. My planet is a gas giant, similar to Jupiter and Saturn. It has no solid surface, but rather a thick atmosphere that extends for thousands of kilometers.
3. The atmosphere of my planet is composed mostly of hydrogen and helium, with small amounts of methane, ammonia, and water vapor. The upper atmosphere is extremely cold, reaching temperatures as low as -200°C, while the lower atmosphere is warmer due to the pressure of the gases.
4. The color of my planet is a deep blue, similar to that of Neptune. This is due to the absorption of red light by methane in the atmosphere.
5. Yes, my planet has rings, but they are much smaller and fainter than Saturn's rings. They are made up of ice and dust particles and are only visible through powerful telescopes.
6. My planet has 27 moons, ranging in size from small irregularly shaped rocks to large, spherical objects like our Moon. The largest moon is named after the planet itself, and is called "Xolotl".
7. My planet has a tilt of 32 degrees, causing it to experience seasons similar to Earth.
8. The diameter of my planet is 90,000 miles, making it slightly larger than Jupiter.
9. One full rotation of my planet takes 10 hours and 45 minutes.
10. It takes my planet 165 Earth years to complete one orbit around the Sun.
Journal Entry:
Today, I am excited to announce the discovery of a new planet in our solar system, which I have named "Tlaloc". Tlaloc is a gas giant located 15.6 AU from the Sun, making it one of the farthest planets in our system. Its atmosphere is composed mostly of hydrogen and helium, with small amounts of methane, ammonia, and water vapor. The upper atmosphere is extremely cold, reaching temperatures as low as -200°C, while the lower atmosphere is warmer due to the pressure of the gases. One of the most striking features of Tlaloc is its deep blue color, caused by the absorption of red light by methane in the atmosphere. It also has a system of faint rings made up of ice and dust particles, and a total of 27 moons, the largest of which is named "Xolotl". With a diameter of 90,000 miles, Tlaloc is slightly larger than Jupiter and has a tilt of 32 degrees, causing it to experience seasons similar to Earth. It takes Tlaloc 165 Earth years to complete one orbit around the Sun, and one full rotation takes 10 hours and 45 minutes. I chose to name this planet Tlaloc after the Aztec god of rain and water, as I felt that the blue color of the planet and the presence of water vapor in its atmosphere were fitting of this name. Tlaloc is a fascinating planet that will undoubtedly provide a wealth of information for future studies, and I am excited to see what new discoveries will come from its exploration.
