Oil and gasoline do not dissolve in water because their molecules are too large and they have weak dispersion forces that are more attracted to themselves than to water. Like dissolves like, meaning substances with similar intermolecular forces can dissolve.
Explanation:Substances such as oil and gasoline do not dissolve in water because their molecules are too large to mix and dissolve in water. The attractive forces between the particles in nonpolar compounds are weak dispersion forces, and the nonpolar molecules are more attracted to themselves than to the polar water molecules.
This causes the liquids to separate into two layers when mixed. The general rule for dissolving substances is 'like dissolves like', meaning substances with similar intermolecular forces can dissolve in each other.
Explain what happened to the original city of Valdez, Alaska. (2 points)
Answer: Old town Valdez, AK was originally built on unstable land. On March 27, 1964 (Good Friday), an 9.2 earthquake erupted 45 miles west of the town. The earthquake caused many landslides and loosened the already unstable soil under the city
n the earliest stages of development the embryos of a fish, calf, human, and tortoise all look similar. In the next stage the calf and the human look most alike. What assumption can be made based on this similarity?
A) The fish is not related to the calf.
B) The fish is not related to the human
C) Of the four organisms, the calf and human are least related.
D) Of the four organisms, the calf and human are most closely related.
Answer:
D) Of the four organisms, the calf and human are most closely related.
Explanation:
According to biogenetic law, stages of embryological development of an organism recapitulates its evolutionary history. The shared characters are exhibited by early embryological stages of various species while the derived features appear in later stages. Since the calf and the human embryo resemble during later stages of embryological development, they are most closely related to each other.
Answer:
The calf, human and tortoise are more closely related to one another than the fish.
Explanation:
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Which of the following is not a factor that impacts the stability of a society?
a.
population size
b.
resource availability
c.
management practices
d.
available money
Please select the best answer from the choices provided
A
B
C
D
Answer:
Option D. The available money is not a factor that impacts the stability of a society.
Explanation:
Social stability is a condition that all of societies aspire to, as the opposite condition known as social instability leads to conflicts between diverse internal groups within a community. The stability of a society will be affected and, in some way relies, upon its population size, the availability of resources, and how the society manages its diverse practices. although money is a factor that can affect the stability of a society, it is not the available money that does so. There a plenty of societies that are not stable enough, that in theory have sufficient money available to be stable. Societies can print large amounts of money and still be unstable, as the value of money is affected by diverse factors.
Different finch species have beaks of different shapes and sizes. What do these beak differences tell us? Different finch species have beaks of different shapes and sizes. What do these beak differences tell us? Different finch beak shapes are evidence that individual birds changed their beaks so that they could feed efficiently. Different finch beak shapes are evidence that all Galápagos finches share a common ancestor. Different finch beak shapes are evidence that finch species adapted to different environments over many generations. Different finch beak shapes are evidence that several finch species with different beak types came to the Galápagos Islands from the mainland.
Different finch beak shapes are evidence that finch species adapted to different environments over many generations.
The correct answer is C. Different finch beak shapes are evidence that finch species adapted to different environments over many generations.
Explanation:
According to Charles Darwin's proposals related to evolution, organisms that are similar such as birds or finches adapt to environmental conditions over time which explains the differences in terms of the phenotype (observable traits). This occurs in the case of finches beak shapes, as Darwin studied around 15 species of these birds in the Galapagos Islands and found finches have different sizes and beak shapes that were linked to the type of food each species consume and the source of this. Therefore, different finch beak show "that finch species adapted to different environments over many generations".
Which statements describe film badges? check all that apply. an amplifying device that indicates the presence of ionizing particles a device that permits determination of the concentration of radioisotopes in the body or other substance film sensitive to radiation that is removed and developed to measure exposure a device used for monitoring individual cumulative exposure to ionizing radiation?
Answer:
film sensitive to radiation that is removed and developed to measure exposure.
a device used for monitoring individual cumulative exposure to ionizing radiation.
Explanation:
Film badges are monitoring devices that contain photographic film which measures and record the wearer’s exposure to different ionizing radiation such as X-rays, gamma rays and beta particles. The photographic film within film badges is very sensitive, functions as a detector, and is enclosed in a vapor and light resistance cover which disallows chemical vapors, light or moisture to have an effect on the film. Film badges give a lasting radiation record and it can also differentiate between different energies of photons.
Answer:
Explanation:
just took it :)
The descriptions below explain two ways that water is used by plants on a sunny day.I. In a process called transpiration, some liquid water in leaves changes to water vapor. The water vapor is released into the air through tiny pores in the leaves. This allows more liquid water from the soil to be pulled up the roots and stem to replace water lost from the leaves.II. Plants use some of this water in leaves in a process called photosynthesis. During photosynthesis, water and carbon dioxide break apart and recombine to form two new substances, oxygen and glucose.Based on the above description of transpiration and photosynthesis, which type of change happens to water during each process?
Answer:
The answer would be A.
Explanation:
I. In a process called transpiration, some liquid water in leaves changes to water vapor. The water vapor is released into the air through tiny pores in the leaves. This allows more liquid water from the soil to be pulled up the roots and stem to replace water lost from the leaves. So A would the correct answer. I also got it right in my quiz
During photosynthesis, within the plant cell, the water is oxidized as it loses electrons. This transforms the water into oxygen.
During transpiration in plants, the water eventually released to the atmosphere as vapor via the stomata present in leaves.
What is transpiration?It is the process of water loss in plants through evaporation from the stomata of plants.
During transpiration, the water near the surface of the leaves changes into vapor and evaporates when stomata are open.
Transpiration provide the water needed to plants for photosynthesis.
During photosynthesis below reaction takes place, where carbon dioxide and water under the sunlight converted into glucose and oxygen.
6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂
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Protein synthesis is compared to baking a cake in the textbook, but the process can also be compared to building a doghouse. sondra wanted to build a doghouse and found a book in the reference section in the local library. she copied the pages of directions using wood and nails to make the doghouse. taking the directions to her workbench, sondra used a hammer to put nails into their correct positions in the wood to make the doghouse. in the story, what genetic structure would be analogous to the copies from the reference book?
Answer:
Copying the book would be analogous to transcription
Explanation:
The copies made from the copying process would be analogous to mRNA. Taking the copy to a workbench would be analogous to the mRNA moving from the nucleolus to the ribosomes in the cytoplasm. The actual building of the dog house would be analogous to the ribosome assembling up the protein using amino acids. Following the instructions of the copy would be analogous to the ribosome reading the codons and bringing in the respective amino acids.
Soils composed mostly of primary minerals will tend to have a higher percentage of _____ and a lower percentage of _____ than soils composed mostly of secondary minerals.
Answer:
sand; clay
Explanation:
Soils composed mostly of primary minerals will tend to have a higher percentage of sand and a lower percentage of clay than soils composed mostly of secondary minerals.
Soils are porous medium that are made up of minerals, organic matter, water, gases, and microorganisms. Soils are mostly composed of minerals (about 45% to 49%) which are derived from two main mineral types; primary and secondary minerals. Primary minerals are usually derived from igneous and metamorphic rocks in soil, while secondary minerals are produced from the weathering of the primary minerals. Soils that contain mainly primary minerals usually have high amount of sand and silt, and a low amount of clay than soils that contain mainly secondary minerals. Examples of primary minerals are K-feldspars (such as sanidine and orthoclase), and micas (such as biotite).
Why is it so important that the spinal cord intercepts messages of pain?
it’s important for the spinal cord to intercept messages of pain because the spinal cord is responsible for an automatic movement in response to a stimulus that’s called reflex, and make responding to the stimulus faster.example: putting your hand on a hot stove, 1. the receptors in your hand detect stimuli (hot temperature). they send messages through nerves to your spinal cord 2. responding nerves signals travel directly from the spinal cord to muscles in your arm, and you pull your hand away 3. AFTER you respond to the stimuli, nerve signals travel from the spinal cord to the brain, and you feel pain.
Derek works in a municipal wastewater treatment plant where he oversees the process of biological treatment. Which stage of municipal wastewater treatment does Derek oversee?
Answer:
Tertiary Treatment stage
Explanation:
There are basically four stages of treatment of sewer/waste water
a) Screening stage – In this stage of treatment, large objects and garbage is removed from the waste water through the use of grit removal equipment
b) Primary treatment stage (Physical treatment)
Physical processes such as aeration, filtration, sedimentation etc. are used to remove the impurities from waste water after the screening stage
c) Secondary treatment stage (Chemical Treatment)
In this stage chemicals are used to coagulate tiny impurities into larger mass so that they can be easily removed through the process of sedimentation, filtration etc.
d) Tertiary treatment stage (Biological Treatment)
In this stage, waste is acted upon by microorganisms that work either in the presence or absence of oxygen to remove organic impurities from the waste water.
Thus, Derek saw the process of municipal wastewater treatment plant at the tertiary stage of waste water/sewer treatment.
Answer:
secondary treatment
Explanation:
I just did the test
Help please! Science.
Systems thinking focuses on
A. only the parts of the system, not the collective effect.
B. exclusively on how ecosystems interact with the environment
C. the ways in which systems interact with the environment
D. the role of individual elements and their releationship with others in the system.
Positive feedback in a system is.
A. words of praise
B. a benefit for the entire system
C. an interaction that benefits one element.
D. an event that benefits on part while weakning another
Why does social science inersect with marine science?
A. many poems and novels are written about the ocean
B. Human behavior causes a lot of issues with the ocean.
C. Social science is another important branch of the sciences.
D. These are very different disciplines that have little connection.
Systems thinking focuses on the role of individual elements and their relationship with others in the system.
1. Systems thinking focuses on the ways in which systems interact with the environment.
2. An event that benefits one part while weakening another.
3. Human behavior causes a lot of issues with the ocean.
1. Systems thinking focuses on the ways in which systems interact with the environment. Therefore option C is correct.
Systems thinking is an approach that emphasizes understanding and analyzing systems as a whole, rather than focusing solely on the individual parts.
It recognizes that systems are composed of interconnected elements that interact with each other and their environment and that understanding these interactions is essential for understanding the behavior and dynamics of the system as a whole.
2. An event that benefits one part while weakening another. Therefore option C is correct.
Positive feedback in a system refers to an interaction or process that amplifies or reinforces a certain condition or behavior within the system. It is characterized by a chain reaction where the initial change leads to further changes that intensify the original condition.
Unlike negative feedback, which tends to stabilize or balance the system, positive feedback drives the system toward a specific direction or outcome.
3. Human behavior causes a lot of issues with the ocean. Therefore option B is correct.
Social science intersects with marine science because human behavior plays a significant role in influencing and impacting the oceans.
The study of marine science focuses on understanding the physical, chemical, biological, and ecological aspects of the ocean and its ecosystems.
However, human activities, such as pollution, overfishing, habitat destruction, and climate change, have profound effects on marine ecosystems.
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A prokaryotic cell is being looked at under the microscope and a scientist is watching molecules such as sodium enter and exit the cell. What part of the prokaryotic cell is being looked at under the microscope? A. DNA B. Cytoplastic membrane C. Plasma membrane D. Cell wall
if sodium entering and exitting the cell is observed, then it is clear that the cytoplasmic membrane is being looked at under the microscope.
Answer:
C. Plasma membrane
Explanation:
Plasma membrane is bilayer of phospholipids in which proteins are embedded. It serves as selectively permeable membrane and regulate the entry and exit of various molecules in and out of the cell. Hence, the observer is looking at the plasma membrane of the prokaryotic cell through which transport of sodium ion is occurring.
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Which of these factors is a disadvantage of hybrid cars?
A.) less gasoline required
B.) high purchase price
C.) low emissions
D.) Federal incentives
Answer:
B.) high purchase price
Explanation:
The hybrid cars are the newest models of cars that are much more environment friendly. They have been heavily promoted, and lot of people do want to have them instead of the traditional cars. The main reason why people are attracted to them is because these cars pollute little to nothing, so compared with the gasoline driven cars that pollute a lot, they are a much better choice for everyone that wants to contribute to the preservation of the environment. The big problem in all of this, and why these cars haven't been selling massively, is that they are much more expensive than the other cars. The majority of the people are just not able to afford them, so despite having a good thought about the environment, and wanting to help, they can not buy these cars.
Answer:
A. Costs a lot initially
In recombinant DNA methods, the term vector can refer to _____.
Answer:
reverse transcriptase
In recombinant DNA methods, a vector is a DNA molecule that functions as a vehicle to carry foreign genetic material into a host cell. Vectors can be plasmids, viruses or artificial chromosomes, and must have the ability to replicate within host cells and contain recognition sites for restriction enzymes and selectable markers.
Explanation:In recombinant DNA methods, the term vector can refer to a DNA molecule used as a vehicle to artificially carry foreign genetic material into another cell, where it can be reproduced. Examples of vectors include plasmids, viruses, and artificial chromosomes such as yeast artificial chromosomes(YACs).
A vector must have three important characteristics: ability to replicate within host cells, recognition sites for restriction enzymes, and selectable markers which allow cells containing vectors to be selectively cultured.
It's the vector's ability to reproduce within the host cell that allows the foreign DNA to be replicated in the process. In other words, it's a medium through which we can produce multiple copies of a particular piece of DNA within a host organism. The DNA typically inserted into these vectors is often genes that a scientist wants to express (have the cell produce copies of them)
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Water that is returned to the environment after secondary treatment is known as _____. influent sludge effluent clarifier
Water that is returned to the environment after secondary treatment is known as effluent.
Answer:
effluent
Explanation:
Secondary treatment uses physical phase separation or biological methods to clean the waste water. Influent is the wastewater which enters the secondary treatment system. Clarifier is a huge tank where it is allowed to stand for solid waste particles to settle down. Sludge is the waste material which gets settled down in a clarifier. Effluent is the final product which exits the secondary treatment plant.
1. Respiration begins with ____________. 2. Gas exchange is needed to provide cells with the ____________ they need for cellular respiration. 3. Tiny air sacs in the lungs are known as ____________. 4. Inhaling is an active movement that results from the contraction of a muscle called the ____________. 5. Asthma is a disease in which the air passages of the ____________ become narrow, often with excessive mucus production. 6. The ____________ is also known as the wind pipe. 7. Emphysema is usually caused by ____________ and is irreversible. 8. The ____________ is also known as the voice box. 9. The ____________ pumps oxygen-rich blood into arteries. 10. ____________ gas exchange is the exchange of gases between inhaled air and the blood. 11. ____________ is a disease in which some of the alveoli of the lungs fill with fluid so gas exchange cannot occur. 12. Oxygen ____________ from the peripheral capillaries into body cells.
I only answered some of them, the ones I knew for sure. Hope this helps
2. Oxygen.
3. Alveoli
4. Diaphragm
6. Trachea
8. Larynx
9. Heart
Which of the following is not considered to be a part of the endomembrane system?
A., endoplasmic reticulum
B., mitochondria
C., Golgi
D., lysosome
E., plasma membrane
Answer:
B., mitochondria
Who used a compound microscope to see chambers within cork and named them “cells”?
Answer:
Robert Hooke
Explanation:
Robert Hooke was a scientist in the field of biology, chemistry, physics. His great discoveries were very important, especially for the understanding of microscopic world, even though they weren't accepted at first. He was the first who developed compound microscope, in which scientists no loner had to move the specimen in order to focus it. Hooke also improved the microscope lightening. When he looked at the bark of a cork tree, he saw new structures and called it cells (because it look to him like rooms in monastery).
Robert Hooke used a compound microscope to observe chambers within cork and named them 'cells'. This observation served as a groundwork for the development of cell theory.
The scientist who used a compound microscope to observe chambers within cork and named them 'cells' was Robert Hooke. This event occurred in 1665 and is a pivotal event in the history of biology. Hooke's observation that cork was made up of tiny, individual compartments led to the development of cell theory, the idea that all living things are composed of cells.
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The lymphatic network begins with microscopic tubes known as:
Answer:
Lymphatic Capillaries
Explanation:
Mark brainliest if correct
Answer: Lymphatic capillaries
Biology students at Science High spent the day swabbing surfaces throughout the school. They ran the swabs over a culture plate and then incubated the plates. 48 hours later, Carol and Jose checked their plate. "Please, do not open the cover of your culture plate!" warned their teacher. Why did the teacher give this warning? A) The life form was unknown to the teacher and she did not want to expose the students to any dangers. B) Spores from this potentially dangerous fungus would spread through the air and be inhaled by students. C) Carol and Jose's plate contains a streptococcus bacteria that could be potentially dangerous to humans. D) The culture revealed a potentially dangerous virus and if the culture plate was opened, the virus would spread rapidly.
ANSWER; C carol and Jose's plate contains streptococcus bacteria that could be potential dangerous for humans.
The teacher cautioned the students not to open the cover of the culture plate to mitigate potential health risks considering the possibility of harmful microorganisms like bacteria, fungi, or virus present, which could spread and pose risk of infection.
Explanation:The teacher warned the students not to open the cover of their culture plate due to potential health risks. When incubating samples collected from different surfaces, it's uncertain what types of microorganisms might be growing, including potentially dangerous bacteria, fungi, or virus. These can become airborne if the dish is opened, posing a risk of inhalation and infection. The exact reason isn't specified from the given options, but the general concern is clearly about preventing potential exposure to harmful agents.
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If you cut a flatworm in half, both halves can grow into a new individual by _____.
If you cut a flatworm in half, both halves can grow into a new individual by fission.
If you cut a flatworm in half, both halves can grow into a new individual by FISSION.
During endocytosis and exocytosis, cells _____.
A) take in what they need and expel what they don't need
B) move water in and out through the cell membrane
C) actively transport molecules across the cell membrane
the answer is letter A
Answer:
Take in what they need and expel what they don't need. (Ans. A)
Explanation:
Endocytosis and exocytosis are two active transport processes which are helping macro molecules present in the cytoplasm to move inside or outside the cell across the plasma membrane. It is an energy requiring movement.
Endocytosis is known as a process which is capturing the particles from outside the cell by engulfing of them with the cell membrane. Endocytosis is mainly two types:
1) Phagocytosis, in this process cell is engulfing whole particle. It is also known as cell eating.
2) Pinocytosis, in this process cell is engulfing already dissolved food. It is also known as cell drinking.
Exocytosis, in this process where vesicles fusing with the plasma membrane which helping them to move substances out of the cell.
Hemoglobin's affinity for oxygen is how much oxygen is actually currently held by the hemoglobin. So, if hemoglobin has high oxygen saturation, hemoglobin's affininty for oxygen is high. What do you think happens to hemoglobin's affinity for oxygen as it moves through the systemic capillaries? As the RBC moves through the systemic capillary, hemoglobin's affinity for oxygen increases. As hemoglobin moves through the systemic capillary, hemoglobin's affinity for oxygen stays the same. As the RBC moves through the systemic capillary, hemoglobin's affinity for oxygen decreases.
Answer:
As the RBC moves through the systemic capillary, hemoglobin's affinity for oxygen decreases.
Explanation:
Red blood cells (RBC) contain hemoglobin molecule which carries the oxygen through the blood. The blood with RBC moves through the systemic capillary and deliveries oxygen to the tissue (oxygen is released from the hemoglobin into the cell of the certain tissue). So, as the RBC moves through the systemic capillary hemoglobin's oxygen saturation lowers and consequently, hemoglobin's affininty decreases.
Hemoglobin's affinity for oxygen decreases as RBC move through the systemic capillaries, thus facilitating the release of oxygen to tissues with lower oxygen concentration and higher metabolic demand.
Explanation:As the red blood cells (RBC) move through the systemic capillaries, hemoglobin's affinity for oxygen tends to decrease. This is due to the oxygen-hemoglobin saturation/dissociation curve, which shows that when the partial pressure of oxygen is high, such as in the lungs, hemoglobin has a high affinity for oxygen and is likely to be fully saturated. However, in the systemic capillaries, as oxygen is delivered to tissues, the partial pressure of oxygen within the capillaries decreases, which leads to a lower affinity of hemoglobin for oxygen. This reduction facilitates the release of oxygen to the tissues that have a lower oxygen concentration and a higher demand due to metabolic activity.
The physiological process described by the affinity for oxygen decreases is an automatic control mechanism that ensures tissues with higher metabolic demands receive more oxygen. Additionally, factors such as increased carbon dioxide concentration or a decrease in pH can further reduce hemoglobin's affinity for oxygen, favoring oxygen release.
A client with diverticular disease is receiving psyllium hydrophilic mucilloid. the drug has been effective when the client:
Answer:
1.
Diverticular disease is treated with a high-fiber diet and bulk laxatives such as psyllium hydrophilic mucilloid (Metamucil). Fiber decreases the intraluminal pressure and makes it easier for stool to pass through the colon. Bulk laxatives do not manage diarrhea, anxiety or relieve gas formation.
Which of the following pairs are the best examples of homologous structures?
(a) bat wing and human hand
(b) owl wing and hornet wing
(c) porcupine quill and cactus spine
(d) bat forelimb and bird wing
(e) Australian mole and North American mole
D. Bat forelimb and bird wing
The net result of a single glycolysis run is the formation of
Answer is 2 NADH and 2 ATP
What conditions or disorders may mimic the symptoms of dementia a. Vitamin deficiency b. Thyroid disorder c. Medication side effect
I believe the answer is a. Vitamin deficiency.
I hope this helps!
Conditions or disorders that mimic dementia symptoms include vitamin deficiency (a), thyroid disorder (b), and medication side effects (c) is all correct .
Vitamin Deficiency (a): Deficiencies in certain vitamins, especially B vitamins like B12, can lead to symptoms that resemble dementia. These symptoms may include confusion, memory problems, and cognitive decline.
Vitamin B12 deficiency, in particular, is known for causing neurological symptoms that can be reversible with proper supplementation.
Thyroid Disorder (b): Thyroid disorders, both hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid), can lead to cognitive impairment and memory problems.
An underactive thyroid, in particular, can cause a condition known as myxedema madness, which mimics dementia symptoms.
Medication Side Effects (c): Certain medications, especially those with anticholinergic effects, can cause cognitive issues. These drugs are commonly used for various conditions, such as allergies, depression, and overactive bladder.
It's essential to review medication lists and consult a healthcare provider if you suspect medication-induced cognitive changes.
Depression and Anxiety: Mood disorders, such as depression and anxiety, can manifest with cognitive symptoms that mimic dementia, like memory difficulties, confusion, and impaired concentration.
Treating the underlying mood disorder can often improve cognitive function.
Infections: Infections in the central nervous system, such as urinary tract infections in older adults, can cause delirium and confusion. These symptoms can be mistaken for dementia but are reversible with appropriate treatment.
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What is the first step that should be taken when a caustic chemical gets into a person's eye?
the person should wash their eye out for no less than 15 minutes
Which enzyme is paired incorrectly with its function? which enzyme is paired incorrectly with its function? helicase: untwists double helix single-strand binding proteins: unpair dna strands and prevent re-pairing topoisomerase: joins sugar-phosphate backbones of okazaki fragments primase: synthesizes an rna primer dna polymerase: catalyzes synthesis of new dna?
Answer:
a) DNA polymerase – catalyze the addition of dNTPs to a new DNA strand b) DNA ligase – produce RNA primers for Okazaki fragment formation DNA primase – produce RNA primer as a starting point for DNA synthesis DNA helicase – unwind DNA helix to separate strands x Telomerase – catalyze lengthening of telomeres in germ cells
In a _______ stain, the dye stains the background, forming a silhouette around the unstained organism.
Answer:
In a negative stain, the dye stains the background, forming a silhouette around the unstained organism.
Explanation:
In this kind of staining, heat fixation is not a requirement since there is less distortion or shrinkage of cells.
This staining is used to accentuate the capsule surrounding bacteria and yeasts.
In negative staining, nigrosin and india ink are used in the process.