Plz help
Which of the following substances is most likely to be soluble in water?
A. a polar substance capable of forming hydrogen bonds
B. a molecule with hydrophilic heads and hydrophobic tails
C. a hydrophobic substance
D. a nonpolar substance
A polar substance which can participate in hydrogen bonding is most soluble in water.
What is a polar substance?Polar substances have molecules where there is a high difference in electronegativity between their constituent atomsFor example, Hydrochloric acid (HCl) is a polar substancePolar substances are "water-loving" which means they dissolve easily in waterTo identify the most water-soluble molecule, we need to understand hydrogen bonding and solubility in water.
What is hydrogen bonding?This form of bonding occurs when there is an attractive electrostatic force between an electronegative group and a hydrogen atom bonded to an electronegative groupFor example, there is hydrogen bonding among water molecules. What kind of a molecule is water?Water is a polar moleculeIt has electronegative oxygen and electropositive hydrogenBy the concept of "like dissolves like", water dissolves polar substances bestMolecules that form hydrogen bonds in water also dissolve very wellThus, a polar substance that can form hydrogen bonds will be most soluble in water. Hydrophobic substances and non-polar substances cannot dissolve well in water.
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What types of variation are frequently exhibited in a population or species ?
Answer:
The variety of alleles in a population, resulting in a variety of phenotypes. Important to help survival of species in an changing environment.
Explanation:
Answer:
The variety of alleles in a population, resulting in a variety of phenotypes. Important to help survival of species in an changing environment.
Explain the difference between sea anemones and jellyfish.
Answer:
Jellyfish move around more, stay in the middle of the water and are clear but some are brightly colored while sea anemones move less and slower, stay at the bottom of the water and have many colorful colors.
In their native habitat, a fungus that kills gypsy moths in the larva stage controls the population. But in the United States, attempts to control the population aren’t 100% efficient. Given the current rate of growth and defoliation, do you think gypsy moths could destroy the ecosystem or contribute to the development of a new ecosystem in this region? Explain your reasoning.
Answer:
It is likely that intensive farming reduced the natural habitat of this fungus, thereby increasing the population of gypsy moths .
Explanation:
The use of larger amounts of land for intensive farming may be an important problem because it reduces the natural habitat available to wild species (in this case a beneficial fungus).
Answer:
Plato
Explanation:
Yes. Gypsy moths are rapidly destroying trees, which are producers. Producers transform radiant energy from the Sun into chemical energy for the entire ecosystem. Over time, tree loss could cause the ecosystem to collapse. Fewer trees could also lead to the growth of other native plants because there is less competition for space and other resources. A change in foliage would directly affect the populations of native organisms in the region. This process may lead to a new ecosystem.
What two things are used to classify stars on the HR diagram?
A. Temperature and luminosity/brightness
B. Color and shape
C. Shape and Size
D. Age and color
Answer:
A
Explanation:
In the HR diagram, temperature and luminosity (brightness) are used to classify stars. I hope this helps!
Final answer:
Stars on the H-R diagram are classified by temperature and luminosity, with the correct answer being A. Temperature and luminosity/brightness. This classification allows astronomers to differentiate between main sequence, giant, and supergiant stars.
Explanation:
The two things used to classify stars on the H-R diagram, also known as the Hertzsprung-Russell diagram, are temperature and luminosity (or brightness). The correct answer to the question is A. Temperature and luminosity/brightness. Stars are arranged on the H-R diagram with temperature increasing to the left and luminosity towards the top. This configuration creates a main sequence where most stars fall, representing the relationship that hotter stars are generally more luminous than cooler ones. In addition, astronomers use the diagram to distinguish different luminosity classes of stars, like main-sequence stars, giant stars, or supergiant stars, by studying details of their spectrum linked to temperature and pressure differences.
What is the purpose of a food chain?
Answer:
Food chains are a pictorial description of an ecosystem: what eats what. This helps scientists track the web of interdependence. If one important component in a chain is removed or affected, we can make predictions about how this might impact the entire ecosystem. We can track the effects of disruptions on a system.
Answer:
Food chains are a pictorial description of an ecosystem: what eats what. This helps scientists track the web of interdependence. If one important component in a chain is removed or affected, we can make predictions about how this might impact the entire ecosystem. We can track the effects of disruptions on a system.
Explanation:
The data shows that recently the shark population increased. How will the increase in the shark population affect the other populations? Be sure to explain whether the sea otter population, the sea star population, and the clam population will change, and why.
Answer:
If there is an increase in the shark population, then there will be a slight decrease in the other populations.
Explanation:
Based upon the three animals listed, the shark is at the top of the food chain. This means that the shark will eat the sea otter and see star, declaring their population will decrease.
An increase in shark population can have a ripple effect on other marine populations due to the interconnectivity of their food chain. For instance, sea otter population might decrease due to increased predation, leading to an increase in the sea star population and a potential decrease in clam population. However, environmental factors such as greenhouse gas emissions and ocean temperatures can also trigger shifts in marine populations.
Explanation:An increase in the shark population can significantly affect other marine populations. For instance, if sharks, who are predators at the top of the food chain, increase in number, they may increase predation on sea otters, a favorite food source, potentially decreasing the sea otter population. This, in turn, could increase the sea star population as sea otters often consume sea stars.
The trend might also increase populations of some other species like clams. If sea stars, which are predators of clams, increase due to a reduction in sea otters, then the clam population might decrease. However, if the increased shark population also reduces the number of seal (a clam predator), then the clam population might, in fact, increase.
Environmental factors such as increases in greenhouse gas emissions and fluctuations in ocean temperatures can also trigger shifts in marine populations. It's important to note that the interconnectedness of these marine populations means a change in one can have a ripple effect on the others.
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Question 9(Multiple Choice Worth 4 points)
(02.04 MC)
Which description justifies why the theory of evolution is a theory and not a law?
Explains how organisms change in response to the environment
Predicts which organism is best suited to the environment
Supported by a small amount of empirical evidence
With more evidence it will become a law
Answer:
A. Explains how organisms change in response to the environment.
Explanation:
A scientific theory is an EXPLANATION of an aspect in the natural world. In other words, it just tells why something happens. Now it is not just a guess, it is well-supported by evidence and previous studies.
Now to knock out your other choices:
B. is wrong because:
A scientific theory does not predict. It can serve as a basis for a prediction, or what you call a hypothesis, but it does not predict an outcome.
C. is wrong because:
As mentioned earlier, a theory is WELL-SUPPORTED by evidence and previous research.
D. is wrong because:
A theory does not become a scientific law.
Do humans and oak trees belong in the same domain?
Answer:
Yes.
Explanation:
This is because there are 3 domains: Archaea, Bacteria, and Eukarya. The domain Eukarya includes plants, animals, fungi, and protista. This means that both humans and oak trees, an animal and a plant, both belong in the same domain, Eukarya.
What can help a scientist identify any object in a group of objects? a. the objects size b. the objects color c. the objects characteristics d. the objects shape HURRY TAKING A UNIT TEST (i only have 10 points so helppp)
Answer:
C
Explanation:
The others seem too specific when scientist look at everything when identifying a object. don't forgot to say thanks!!
Answer:
C. The Objects Characteristics
what are two specific examples of genetically modified organisms
Heterozygous is when
Answer:
Having two different alleles of a particular gene or genes.
Explanation:
Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous.
Which of the following statements about comets is true?
A.
Comets are mostly made up of rock. They are usually very hard to see, but as they approach the Sun the rock heats up and becomes much easier to see.
B.
Comets are mostly made up of rock. They are usually very easy to see but as they approach the Sun the rock condenses and becomes much harder to see.
C.
Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very easy to see but as they approach the Sun these particles condense and become much harder to see.
D.
Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very hard to see, but as they approach the Sun these particles heat up and become much easier to see.
Answer:
D
Explanation:
Comets are brightest near the sun.
Please I need the answer ASAP !!!!
If the somatic cells of a human contain 46 chromosomes, then after meiosis new sex cells would contain _____ chromosome
Answer: 23 chromosomes
Drag each label to the correct location on the diagram. Each label can be used more than once, but not all labels will be used. The diagram shows some of the steps in the flow of energy through an ecosystem. The arrows represent the transfer of energy. Label each arrow with the type of energy being transferred.
Answer/Explanation:
In the diagram showing a typical food chain in an ecosystem, the arrow that connects the sun to plants represents the flow of radiant energy. The sunlight produces radiant energy, of which producers, such as plants, converts into chemical energy through photosynthesis.
The next arrow linking the plants to the rodent shows the flow of chemical energy in plants to primary consumers, such as rodents, who feed on them.
Also, rodents, when preyed upon by secondary consumers, such as wolfs and owls, pass on the same chemical energy to them. So the arrows connecting the rodent to owl, and to the wolf both show the transfer of chemical energy from the rodent to the owl and wolf.
The next arrow shows the transfer of thermal energy from the wolf to the environment, as the wolf release heat from the body resulting from daily functions it performs, and also, thermal energy is released to the surroundings as heat during the decomposition of the body of an animal.
The arrow linking the wolf to the decomposer which break down the body and waste of the wolf represents transfer of chemical energy to the decomposer, as they break chemical bonds to obtain the energy they need to survive and grow.
Answer:
this is correct on plato
Explanation:
If the inner membrane of mitochondria was not folded, how would it affect the organism?
A. It would have less energy due to a smaller area for cellular respiration to take place.
B. There would be no effect.
C. Cellular respiration would slow, but the rate of ATP production would increase.
D. It would have more energy due to a larger area for cellular respiration to take place.
Answer:
A.
If the inner membrane of the mitochondria was not folded then there wouldn't be enough surface area for the electron transport chain.
Explanation:
Hope this helps!!!!!!
Forever friend and helper,
Cammie:)
If the inner membrane of mitochondria is not folded, then it would have less energy due to a smaller area for cellular respiration to take place. The correct option is A.
What is mitochondria?Mitochondria are membrane-bound cell organelles that garner the majority of the chemical energy required to drive the biochemical reactions of the cell.
The mitochondrial energy is kept in a small molecule known as adenosine triphosphate i.e., ATP.
Several hundred to thousands of mitochondria are found in the fluid that covers the nucleus in each cell i.e., cytoplasm.
The mitochondria, also renowned as the powerhouses of the cell, produce the energy required for the cell's continued existence and function.
Mitochondria use a series of chemical reactions to convert glucose into an energy molecule known as adenosine triphosphate which is used to power various cellular processes.
If the inner membrane of the mitochondria is not folded, it will have less energy because there will be a smaller area for cellular respiration to occur.
Thus, the correct option is A.
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Which of the following BEST describes what happens to the amount of oxygen in the blood when blood comes into contact with a cell? A. It increases because the oxygen moves out of the cell into the blood. B. It decreases because the oxygen moves out of the blood into the cell. C. It increases because carbon dioxide is converted to oxygen in the blood. D. It decreases because the blood uses up all the oxygen before it gets to the cell.
When blood comes in contact with the cell, it decreases because the blood uses up all the oxygen before it gets to the cell.
WHAT IS CELLULAR RESPIRATION?Cellular respiration is the process by which living organisms break down food molecules in their cells to produce energy.
The process of cellular respiration makes use of oxygen in an aerobic environment.
This means that when blood comes in contact with the cell, it decreases because the blood uses up all the oxygen before it gets to the cell.
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Which statement regarding hemodialysis is true?
A. The dialysate fluid flows into the abdominal cavity through a catheter.
B. The blood is circulated out of the body for cleansing and then returned.
C. The patient is able to move around during the procedure.
D. Wastes move from a region of lower concentration to a region of higher
concentration.
Answer: B. The blood is circulated out of the body for cleansing and then returned.
Explanation:
Hemodialysis is a medical therapy in which the patient's blood is taken out with the help of tubes and treated out of the body. The blood is pumped out using the blood compartment. The blood is circulated using a external filter, that is called as dialyzer. The blood get cleansed and impurities are removed and purified blood returned via circuit back to the body. This technique is used to control the blood pressure and balance of important minerals in the body that involves the potassium, sodium and calcium in the blood.
Based on the above information, option. B is the correct option.
Can a single off spring inherit both chromosomes from one parent? explain.
So I should be saying no, because in order for an offspring to be made it needs to be formed from 2 haploid gametes, each with one of each chromosome blah blag blah... However, if a nondisjunction were to occur in the gametes of both parents during meiosis, it is possible that, for example: sex chromosomes, one parent could give two chromosomes and the other could give none. It's rare, but it happens.
Which structure is the arrow pointing to
Lysosome ,nucleus ,ribosome
What is the function
Breaks down waist,controls activities,
Produces protien
Answer:
Nucleus
Explanation:
It is the unit of heredity and it controls the activities of the cell
It is best to say that marine debris ____
A. is a hazard to marine animals
B. a pervasive, global pollution problem
C. all of the above
D. degrading ocean health
Answer:
C. All of the above
Explanation:
It is best to say that marine debris causes all of the above.
What is Marine Debris?Marine debris is any litter whether accidental or intentional that ends up in the water body be it oceans, seas, lakes, pond, etc .
The sources of Marine debris include:
Sewage overflowwater runoffDeliberate litteringPoor waste disposal and managementindustrial activities illegal dumping.When these debris accumulate , over time they cause health hazard to the water bodies by
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A component of a circuit changes, as shown below. At left a short horizontal line then a small circle with a line pointing up at about 45 degrees then a short gap then a small circle then a short horizontal line. In the middle an arrow pointing right. At right a short horizontal line then a small circle then a shorter horizontal line then a small circle then a short horizontal line. How would this change affect the electric circuit? A switch is closed, so the circuit would be incomplete and broken and the lights in the circuit would not shine. A switch is closed, so the circuit would be complete and unbroken and the lights in the circuit would shine. A switch is opened, so the circuit would be incomplete and broken and the lights in the circuit would not shine. A switch is opened, so the circuit would be complete and unbroken and the lights in the circuit would shine.
Answer:
B A switch is closed, so the circuit would be complete and unbroken and the lights in the circuit would shine.
Explanation:
A switch is closed, which causes the electric circuit to become complete and uninterrupted and the lights in the circuit to shine, hence option B is correct.
What is an electric circuit?When an electric charge builds up inside of an item, it disperses across its surface and stays there until it can be discharged by an electrical current or electrical discharge this is known as "static electricity."
A short horizontal line, a tiny circle with a line going up at around 45 degrees, a short gap, a small circle, and a short horizontal line are displayed on the left.
An incomplete circuit is represented by an open switch, and a complete circuit is by a closed switch.
Therefore, the switch is now closed, thus the lights would turn on and the circuit would be complete, hence option B is correct.
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A population of light-colored mice was moved from the Sand Hills to a wooded area with dark soils.What do think would happen to this population after 10,000 years or longer?
Answer:
Explanation:
In this type of situation Survival of the Fittest and Evolution would take place. The population will begin to shrink drastically as they are easy prey in this new environment. Those that manage to survive will begin to adapt in order to better survive. As the years go by the population will begin to evolve into a species that will both survive and thrive in this wooded environment. Such as a species with a darker color for starters.
Which statement provides an example of how social hierarchy might influence a population?
Soldier termites defend the colony from predators.
Prairie dogs use a high-pitched bark to communicate.
Mistletoe sends roots into tree branches to take in nutrients.
Poison tree frogs have bright colors signifying that they are toxic.
Answer:
A. Soldier termites defend the colony from predators.
Explanation:
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An example of how a social hierarchy can influence a population is the role of soldier termites in a termite colony, where their function of defending the colony greatly influences its survival.
Explanation:A social hierarchy often dictates the roles, responsibilities, and interactions within a population, influencing its overall structure and functioning. An illustration of this could be 'Soldier termites defend the colony from predators.' The social hierarchy of termites is divided into distinct classes or 'castes', each with different functions. For instance, the soldier termites have the primary responsibility of protecting the colony from potential threats. Their existence and functionality greatly influence the population's survival due to their crucial defense role.
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What is the DNA sequence for normal hemoglobin?
You observe small bubbles of air on the underside of an underwater leaf.
Where could these air bubbles be coming from?
Answer:
This could possibly be caused by some sort of insect or some microscopic being on the leaf.
Explanation:
The air bubbles on the underside of an underwater leaf are likely produced by photosynthesis, where plants release oxygen as gas bubbles, and may also be associated with aquatic insects and spiders that create or carry air bubbles to breathe underwater.
Aquatic plants, like all plants, take in carbon dioxide and use sunlight to convert it into oxygen and glucose. The oxygen produced can be released as gas bubbles, which you see attached to the leaf. Similarly, some underwater creatures, such as aquatic insects or spiders, may carry or generate air bubbles for respiration. For example, diving bell spiders create air bubbles to help them breathe underwater by trapping a bubble that sticks to their hairy abdomens and taking it to their silk air tanks, also known as "diving bells". This adaptation allows them to stay submerged for extended periods.
teractions between cyclins and cyclin-dependent kinases control the cell cycle. Explain how the presence or absence of inhibitors of cyclin-dependent kinases might play a role in normal cells becoming cancer cells.
Answer:
Cyclins are proteins that bind to kinases (i.e., cyclin-dependent kinases), by acting as their cofactors. The cyclin-dependent kinases play critical biological functions such as, for example, the regulation of the cell cycle, mRNA processing, etc. The inhibitors of cyclin-dependent kinases are able to alter the cell cycle progression and thereby inhibit cell death (apoptosis), which is common in cancer cells .
Which of these is NOT a possible of effect of dropping air pressure? (picture below)
Answer: Birds fly higher in the sky at higher speeds
Explanation:
In the food chain, we would classify plants as ___ and the animals as ___.
A.producers;consumers
B. producers;predators
C. consumers;predators
D. consumers;decomposers
Tysm!
Answer:
A. producers;consumers
A producer can either be a plant or bacterium, the first part of the food chain after the sun.
A consumer is an organism that eats plants or other animals for energy. The four types of consumers are herbivores, carnivores, omnivores, and detritivores (decomposers)
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