which of the following statements are true for human erythrocytes? 1. oxygen diffuses through the phospholipid bilayer. 2. sodium ions diffuse through the phospholipid bilayer. 3. water passes in and out of these cells by osmosis. a. 1 and 2 b. 1 and 3 c. 2 and 3 d. 1, 2 and 3
The cell membrane's phospholipid bilayer allows oxygen molecules to move through it. This is because oxygen is a little, nonpolar particle. The correct answer is (A).
Red blood cells, or RBCs, are the erythrocytes. RBCs that are mature and in circulation do not have a nucleus.
The blood transports nearly 70% of carbon dioxide as bicarbonate, 20-25% as bound RBCs, and approximately 7% as dissolved plasma. However, RBCs (as bound to hemoglobin) transport nearly 97% of oxygen, while plasma transports the remaining 3% in a dissolved state.
Biconcave, anucleate, and bright red, erythrocytes lack a nucleus. They are adept at maneuvering the circulatory system due to their concave, smooth, and pliable nature. Hemoglobin is a protein found in red blood cells. Each of the four subunits that make up hemoglobin contains a heme group.
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Five ways humans impact the environment are deforestation, desertification, Non-native species, and overharvesting.
Now pick 3 of them and discuss the causes and consequences of them!
ill be marking brainliest
Answer:
hope you help
Explanation:
The loss of trees and other vegetation can cause climate change, desertification, soil erosion, fewer crops, flooding, increased greenhouse gases in the atmosphere, and a host of problems for indigenous people.
Answer: deforestation
Explanation: cutting down of trees without replacement leads to desertification
Why did Napoleon rise so quickly?
Napoleon was a well-known military leader who was incredibly charming, bold, and ambitious. This mindset and military strategies worked together to help him advance through the rise so swiftly.
Because of Napoleon extreme desire, his military victories aided him in gaining power. He approved the Napoleonic Code, instituted policies to stimulate the economy, and established a public school system. He began to wage wars against his neighbors in an effort to subjugate them and modernize Europe. He uses the dogs to chase Snowball, his main rival, off the property. Napoleon used a range of tactics to keep his power and influence.
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Napoleon was a well-known military leader who was incredibly charismatic, bold, and ambitious. This mindset, coupled with his brash manner and cunning yet unconventional military strategies, let him to advance through the ranks so swiftly and finally become Emperor of France in 1804.
Additionally, Napoleon was able to establish some political ties, in part because to his siblings and later his wife. Napoleon had much less command and combat experience when appointed to the Army of Italy than his immediate subordinate divisions commanders, who had stronger cases for leading the army in terms of strict merit, and he actually owed much of his rapid rise to the command of the Army of Italy to these political connections rather than ability.
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Which of the following describes a common role played by animals in the carbon cycle?
Dissolve and store carbon for long periods of time
Take carbon from the atmosphere to use to make food
Release carbon into the atmosphere through respiration
Break down carbon stored in rocks through the process of weathering
Answer:
Release carbon into the atmosphere through respiration
Explanation:
During cellular respiration the molecule takes in oxygen and glucose. ... Pyruvate is transported into the mitochondria and loses carbon dioxide to form a two-carbon molecule.
Answer:
Release carbon into the atmosphere through respiration
Explanation:
then that carbon is used by plants to create oxygen and the cycle repeats.
Which of these are neurotransmitters associated with unipolar depression?Serotonin and noepinephrineA) dopamine and acetylcholine.B) dopamine and glutamine.C) serotonin and GABA.D) serotonin and norepinephrine.
Serotonin and norepinephrine are the neurotransmitters most typically linked to unipolar depression.
The right response is option D, which refers to serotonin and norepinephrine.
Unipolar depressionMajor depressive disorder, also known as unipolar depression, is a mood illness characterized by persistent feelings of despair and hopelessness as well as a lack of interest in once-enjoyable activities.
There is evidence to suggest that unipolar depression may occur as a result of neurotransmitter imbalances, particularly those involving serotonin and norepinephrine.
Among other things, the neurotransmitter serotonin controls mood, hunger, and sleep. Norepinephrine, also referred to as noradrenaline, is a neurotransmitter that affects arousal, attention, and the "fight or flight" response.
Serotonin and norepinephrine levels in the brain have been linked to depressive symptoms, and elevating these levels with medication has been shown to help some persons with unipolar depression.
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Which factor is found in a scientific claim? endorsements by celebrities subjective data similar results in multiple tests of the claim data based on opinions
Answer:
similar results in multiple tests of the claim
Explanation:
A scientific claim comprises of similar results in multiple tests of the claim.
Scientific methods include observation, performing experiments, inference etc.
A scientific claim is however said to be valid when the results of the experiment are reproducible multiple times in any part of the world. The results are usually shared with others to ensure that the several tests are conducted by different scientists to check its authenticity.
The answer is C) Similar results in multiple tests of the claim on Edge 2020
Complete the passage to describe independent assortment. (Fill in blanks)
During metaphase 1, the chromosomes line up in the middle of the cell. The way the chromosomes line up is ________ , or independent. This independent alignment results in different possible arrangements or assortments of chromosomes during metaphase. This in turn results in different __________ of chromosomes in _____
cells. During sexual reproduction, the traits that are determined by the genes on these chromosomes are passed on from parents to offspring.
Answer:
During metaphase 1, the chromosomes line up in the middle of the cell. The way the chromosomes line up is random, or independent. This independent alignment results in different possible arrangements or assortments of chromosomes during metaphase. This in turn results in different sets of chromosomes in daughter cells. During sexual reproduction, the traits that are determined by the genes on these chromosomes are passed on from parents to offspring.
Explanation:
In metaphase, the typical chromosome is formed by two chromatids joined by a centromere. Each chromatid is composed of a sequence of chromatin ringlets domains. During metaphase I, fibers of the spindle apparatus capture chromosomes and take them toward the center of the cell, to the metaphase plate. Each chromosome of the pair joins with a microtubule of only one of the spindle poles, so the two equivalent chromosomes join the fibers of opposites poles.
The homologous pairs of chromosomes get aligned in the metaphase plate for their posterior separation in anaphase I. When they align in the center of the cell, their orientation is random.
Answer:
1st blank: Random
2nd blank: Combinations
3rd Blank: Sex
Explanation: I got 100 on it.
Viruses attack and destroy which of the following
(A) cells
(B) mutations
(C) vaccines
(D) pasteurization
Answer:
Cells
Explanation:
Viruses attack the body's cells in order to weaken the body ._.
After the commission of a violent crime will a thorough cleaning of all surfaces previously covered in blood help to hide this type of evidence?
No. It is impossible to completely remove all traces of blood from a surface after a violent crime. Even after a thorough cleaning, certain forensic tests can detect traces of the blood left behind.
Based on this information, what is her weight on Earth? How would her
mass be affected by the different gravities on each of the planetary bodies? Explain
how gravity affects mass.
Gravity does not affect the mass of an object, but it does affect the weight of an object on different planetary bodies.
The weight of an object is directly proportional to its mass and the strength of the gravitational field on that planet.
How would mass be affected by the different gravities of each of the planetary bodies?Gravity does not affect the mass of an object.
Mass is a measure of the amount of matter in an object and is a fundamental property of that object. It remains constant regardless of the gravitational force acting upon it.
However, weight, which is the force with which gravity pulls on an object, is affected by the gravitational field of a planetary body. The weight of an object on a planet or other celestial body depends on the mass of that object and the strength of the gravitational field on that planet.
The formula for calculating weight is:
Weight = mass x gravitational acceleration
where gravitational acceleration is the acceleration due to gravity on that planet.
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3. How does water leaves the ocean and returns?
A Condensation and Precipitation
B. Runoff and Condensation
C. Precipitation and Runoff
D Evaporation and Precipitation
What are the 5 unifying themes in the study of biology?.
The unifying themes are enterprise, information, electricity count number, interaction, and Evolution. those subject matters play a component in biology as they can be used to examine positive elements of the way organisms interact with other organisms and their surroundings.
Evolution, biology's central theme, explains the harmony and variety of life. The Darwinian theory of natural selection debts to the adaptation of populations to their surroundings.
The term topic can be defined because of the underlying means of a tale. it's far the message the author is attempting to bring thru the story. often the theme of a story is a large message approximately existence. The theme of a story is vital because a story's theme is a part of the cause of why the author wrote the story.
Differential reproductive achievement of various indiviTwo crucial unifying themes in biology is that 1) existence is organized on many levels, and 2): The genetic characteristics of individuals in a populace trade over time. information that is based on enjoyment and statement.
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the purpose of this set of laboratory exercises is to introduce you to the basics of cell division (sometimes referred to as cellular reproduction). from this lab, and from your readings, you should learn to:
The purpose of this set of laboratory exercises is to introduce you to the basics of cell division (sometimes referred to as cellular reproduction). From this lab, and from your readings, you should learn to describe the structure and function of the cell cycle.
The cell cycle is the life cycle of the cell that includes growth and division. It is made up of two main stages, the interphase and the mitotic phase. Interphase is the stage where the cell grows and prepares for division.The mitotic phase, on the other hand, is the stage where the cell undergoes cell division.
Mitosis is the process of cell division that is responsible for the creation of two identical daughter cells that have the same genetic material as the parent cell.The cell cycle is regulated by various checkpoints and controls to ensure that the cell divides properly and accurately. The cell cycle is essential for the growth and development of an organism as well as for the repair and replacement of damaged or old cells.
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Select all Options that are enzymes.
1. Sucrose
2. Lipase
3. Glycerol
4. Trypsin
5. Pepsin
6. Deoxyribose
all of the above are different kinds of enzymes
the axon:
a) is the main body of the nerve cell
b) sends neurotransmitters
c) is the ending point of the nerve impulse
d) receives neurotransmitters
Answer:
Sends neurotransmitters
Explanation:
APEX answer
Answer: Sends neurotransmitters
Explanation:
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explain why there is such a great drop in biomass as you work your way up
As you work your way up the trophic levels of an ecosystem, there is a significant drop in biomass, which is the total mass of living organisms present. This phenomenon is known as the ecological pyramid or the pyramid of biomass.
There are several factors that contribute to this pattern:
Energy transfer efficiency: As energy moves through the food chain, there is a loss of energy at each trophic level. Organisms at higher trophic levels typically obtain their energy by consuming lower trophic level organisms. However, energy is not efficiently converted from one trophic level to the next. Only a fraction of the energy consumed is converted into biomass, while the rest is lost as heat or used for metabolic processes. This inefficiency in energy transfer results in a decrease in biomass as you move up the trophic levels.
Energy requirements and metabolic losses: As organisms grow and carry out their life processes, they require energy for maintenance, growth, reproduction, and other activities. Higher trophic level organisms tend to have higher energy requirements due to larger body sizes or more complex physiological processes. A portion of the energy acquired from lower trophic levels is used for these metabolic needs rather than being converted into new biomass. This further contributes to the drop in biomass at higher trophic levels.
Trophic level efficiency and population sizes: Each trophic level has a limited carrying capacity, which determines the maximum population size it can sustain. As you move up the trophic levels, the population sizes of organisms naturally decrease due to limited resources, competition, predation, and other ecological factors. With smaller populations, there is less biomass available at higher trophic levels.
Overall, the combination of energy transfer inefficiencies, energy requirements, metabolic losses, and population dynamics leads to a substantial decrease in biomass as you progress up the trophic levels. This pattern reflects the constraints and limitations within ecosystems and highlights the importance of energy flow and ecological relationships in shaping the structure and dynamics of biological communities.
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Produces in the upper part of the ocean get nutrients from
O river water that washes out to the ocean
O dead organisms floating in the water
O materials brought to the surface by upwelling
their roots, which grow into the ocean floor
How many previous mass extinctions do scientists have
evidence for from the fossil record?
the physical manifestation of an organism's genes (i.e. the way the organism appears) is its:
The physical manifestation of an organism's genes is its phenotype. This refers to the observable characteristics of an organism, such as its height, eye color, and other physical features. The phenotype is determined by a combination of the organism's genotype (its genetic makeup) and environmental factors.
For example, a person may have the genotype for tallness, but if they experience malnutrition or other environmental factors that inhibit growth, their phenotype may not reflect their genetic potential. Understanding an organism's phenotype is important in fields such as genetics, evolutionary biology, and medicine, as it can provide insights into the underlying genetic and environmental factors that contribute to health and disease.
The physical manifestation of an organism's genes, meaning the way an organism appears, is called its phenotype. The phenotype is the observable expression of an individual's genetic makeup, or genotype, as it interacts with the environment. It includes the organism's physical traits, such as size, color, shape, and behavior. In summary, the phenotype represents the visible outcome of the complex interplay between an organism's genes and its environment.
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What is the
Human Genome
Project?
A. A project started by scientists to map and sequence the
entire human genome.
B. A group of scientists that decided to look into the
history and evolution of humans.
C. A field that developed a computer system that was
advanced enough to read DNA on its own.
A. A project started by scientists to map and sequence the entire human genome is the Human Genome Project.
The Human Genome Project is an international research effort whose main goals are to identify all 50,000–100,000 genes found in the human genome, decipher the chemical sequence of the complete human genetic material (i.e., the entire genome), and provide research tools to analyze all this genetic data.
A project started by scientists to map and sequence the entire human genome. An extensive multinational effort was made as part of the Human Genome Project to map and sequence the whole human genome, which contains all of the genetic material found in an individual. This study, which includes scientists from numerous nations and organizations, started in 1990 and was finished in 2003. The project's objective was to produce a thorough map of the human genome that would aid in understanding the genetic underpinnings of human biology and illness. The data produced by the Human Genome Project has had a significant influence on many fields of biology and medicine and is still a valuable source for continuing research.
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Which statement correctly describes the relationship between technology
and science?
A. New developments in technology make scientific research
irrelevant.
B. Science benefits society as a whole, while technology benefits
engineers only.
OC. Science is used to develop new technology, but technology is not
used in science.
OD. Science and technology influence each other and lead to new
discoveries.
Answe:
The Correct answer is D
Science and technology influences each other and leads to new discoveries
Please help. What is the function of cell wall?
Answer:
According to my search:
Explanation:
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.
Generally:
It protects the cell and prevents any physical damage. It provides structure to the cell. It prevents osmotic bursting. It protects the protoplasm against mechanical injury.The cell wall is a structure only found in plants. It surrounds the cell and it provides protection, as well as gives it its structure and helps with filtering what goes in and out.
The most basic functions of the body, such as breathing, blood pressure, and swallowing, are controlled by the:________a. brain stem.b. cerebral cortex.c. cerebrum.d. cerebellum.
The most basic functions of the body, such as breathing, blood pressure, and swallowing, are controlled by the brain stem (option A).
What is the brain?The brain is the control center of the central nervous system of an animal located in the skull which is responsible for perception, cognition, attention, memory, emotion, and action.
The brain has several compartments that perform specific functions. The brain stem is part of the brain that connects the spinal cord to the forebrain and cerebrum.
The brain stem helps controls basic functions in the body such as; breathing, blood pressure, heart rhythms and swallowing.
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How do you rule a X-linked recessive pedigree?
Ruling a X-linked recessive pedigree involves analyzing the family history and pattern of inheritance of a trait or disorder to determine if it is likely to be inherited in an X-linked recessive pattern.
The disorder can be identified by:
Construct a pedigree by gathering information about the family history of the trait or disorder. Identify the pattern of inheritance by analyzing the transmission of the trait or disorder within the family. X-linked recessive disorders typically show a pattern of transmission in which affected males are only found in the direct line of descent from a female carrier. If the disorder is only found in males and not females, or if it is found mostly in males, it could be X-linked recessive.Exclude other possible modes of inheritance. Confirm the mode of inheritance by performing genetic testing. Genetic tests such as DNA sequencing or linkage analysis can be used to identify the specific genetic mutation causing the disorder in affected family members. Identify the specific gene mutation. With the help of genetic testing and linkage mapping it's possible to identify the specific gene and the mutation that causes the disorder.To know more about Pedigree analysis, click here,
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what two characteristics do mosses liverworts and hornworts related
The two characteristics that mosses, liverworts, and hornworts are related by are their status as non-vascular plants and their ability to reproduce through spores.
Mosses, liverworts, and hornworts are all members of the division Bryophyta, which represents the group of non-vascular plants. Non-vascular plants lack specialized tissues for conducting water and nutrients throughout the plant body. Instead, they rely on direct absorption and diffusion. This distinguishes them from vascular plants like ferns, gymnosperms, and angiosperms. Additionally, mosses, liverworts, and hornworts reproduce through spores rather than seeds or flowers. They produce spore capsules that release spores, which eventually grow into new gametophytes.
This reproductive strategy is another shared characteristic among these three groups of plants. Therefore, the two characteristics that unite mosses, liverworts, and hornworts are their non-vascular nature and their spore-based reproduction. The answer is non-vascularity and spore reproduction .
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Drag and drop each tissue or structure to the germ layer from which it is derived. Ectoderm Mesoderm Endoderm red blood cells central nervous system notochord kidney tubule cells thyroid follicular cells epidermis peripheral nervous system lung alveolar cells pancreatic acinar cells skeletal muscle
Ectoderm: central nervous system, peripheral nervous system, epidermis Mesoderm: notochord, kidney tubule cells, skeletal muscle Endoderm: red blood cells, thyroid follicular cells, lung alveolar cells, pancreatic acinar cells
I'll list the germ layers and their corresponding tissues or structures:
Ectoderm:
- Central nervous system
- Epidermis
- Peripheral nervous system
Mesoderm:
- Red blood cells
- Notochord
- Kidney tubule cells
- Skeletal muscle
Endoderm:
- Thyroid follicular cells
- Lung alveolar cells
- Pancreatic acinar cells
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Which of these is a description of climate?
A. It was 98 degrees outside yesterday.
B. The wind speed right now is 5 miles per hour
C. San Jose has cool winters.
D. Last week we had 1 inch of rain.
Answer:
c
Explanation:
Which of the following would probably be the most effective choice for a speech topic? a. Molecular biology b. The history of democracy c. Zoology in the Australian outback d. The migration habits of Tasmanian wombats.
The most effective choice for a speech topic would probably be b. The history of democracy.
When considering the effectiveness of a speech topic, it is important to choose a subject that is engaging, relevant, and has broad appeal to the audience. While topics such as molecular biology, zoology in the Australian outback, and the migration habits of Tasmanian wombats may be interesting to certain audiences, they are more specialized and may not capture the attention of a general audience. On the other hand, the history of democracy is a topic that has universal significance, as it explores the development, principles, and impact of democracy throughout history. It offers a wide range of potential subtopics and can generate meaningful discussions and reflections on the value and challenges of democratic systems.
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Which of the following are density-dependent factors? (Choose all that apply)
flash floods
disease
food supply
volcanic eruptions
which of the following is density- independent factor?
flash floods
genetic diversity
food supply
water availability
Answer:
Since “DENSITY FACTORS” affect a population in the same ways as others. I will say DISEASE & FOOD SUPPLIES
The following are density-dependent factors are:
b. disease
c. food supply
Density-dependent factors:Density dependant elements can have either a positive or a negative relationship to populace size. With a positive relationship, these restricting variables increment with the size of the populace and breaking point development as populace size increments.
This includes disease, predation, and food supply.
Thus, correct options are b and c.
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true or false: in monogamous groups the males and females may have more than one mating partner 1.true2.false
The statement "in monogamous groups, the males and females may have more than one mating partner" is false.
What is Monogamy ?A mating system known as monogamy is one in which a person only ever has one mating partner at a time. Males and females in monogamous societies create exclusive pair bonds and exclusively mate with one another. This indicates that in monogamous groups, neither males nor females are simultaneously mated with more than one partner.
Therefore, The adage "in monogamous groups, the males and females may have more than one mating partner" is untrue.
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