Answer:
E - F - A - C - B - D
Explanation:
After the export of mRNA from the nucleus, translation (protein synthesis) begins in the cytosol. Proteins that should be secreted from the cell, must e targeted to the endoplasmic reticulum (ER) and this process occurs co-translational (while translation is still in progress).The signal recognition particle (SRP) is involved in the process of targeting, because it recognizes specific signal sequences in proteins and targets that protein to the endoplasmic reticulum (SRP binds to its receptor in the membrane of the ER).
Which statements best describe natural selection? Check all that apply. Populations must have genetic variation. Genetic mutations do not produce advantageous traits. Natural selection occurs when the environment changes. Evolution works independently of natural selection. Organisms best suited for the environment survive and reproduce
Answer:
The answers are A, C, E.
Explanation:
My only explanation is I did the question wrong and got the answers...
A) Populations must have genetic variation.
C) Natural selection occurs when the environment changes.
E) Organisms best suited for the environment survive and reproduce.
Natural selection is the process by which organisms with advantageous traits survive and reproduce more successfully, leading to evolution. Genetic variation is necessary for natural selection to occur, and environmental changes can influence the process. Evolution entails shifts in genetic frequencies within a population as a result of differential survival and reproduction.
Explanation:Natural selection is a central concept in evolutionary biology that describes the process by which organisms with traits that better enable them to adapt to their environment tend to survive and reproduce in greater numbers. This process can only occur when there is genetic variation within a population. Mutations are a source of this variation, as they can produce new, advantageous traits that allow some individuals to have a higher rate of survival and reproduction.
However, it is important to understand that not all genetic mutations lead to advantageous traits. Furthermore, for evolution to occur by natural selection, there must be a change in the environment that affects the survival and reproduction of individuals with different traits. This process leads to a shift in phenotypic variations and eventually changes the genetic frequencies within the population.
In summary, natural selection acts on the population's heritable traits, where individuals that are well-suited for their environment are more likely to leave more offspring than those who are less adapted. Over time, this can lead to the evolution of the population as advantageous traits become more common and deleterious alleles decrease in frequency.
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Refer to the illustrations showing a sarcomere in two different stages to answer the question.
What does Stage 1 represent?
A. a muscle that is rotating
B. a muscle that is fully at rest
C. a muscle that is fully contracted
When the muscle is at rest, myosine heads are not interacting with actin. Stage 1 in the image represents a muscle that is fully at rest (Option B).
What are the components of the Sarcomere?In the sarcomere, we can identify the following components,
• A-band. This band reflects the length of the thick filament, including a small portion of the thin filament.
• I-band. This is the area located between the ends of the adjacent thick filaments. It is composed only of thin filaments.
• H-zone. This is the area located between the ends of the thin filaments. It is only composed of a portion of the thick filaments.
• Z-band is the vertical line placed at the end of each sarcomere. In adjacent sarcomeres, Z-band can be found in the middle of the I band.
How does muscle contraction occur?At restAt rest, tropomyosin is inhibiting the attraction strengths between myosin and actin filaments.
Tropomyosin is obstructing binding sites for myosin on the thin filament.
Contraction
During contraction, binding sites between myosine and actin become unblocked.
Myosin heads join to the uncovered actin-binding points forming cross-bridges. A power stroke initiates when this binding occurs. While the power stroke happens, myofilaments slide impulsed by chemical energy collected in myosin heads.
The muscular fiber gets shorter because the sarcomere reduces in length. The H line and the I band get shorter. Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction. A band keeps constant in length.
Stage 1 in the image represents a muscle that is fully at rest (Option B). Binding sites between myosin and actin are blocked.
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Recall the following rules for base pairing in a DNA strand (note: not in an RNA strand):
dna pairs
Use the above to complete the following table: (remember I'm asking for DNA, so there are no U's)
Template Strand Complementary Strand
AAATT a.
CGCAT b.
GGGAC c.
ACGGT d.
Answer:
AAATT - TTTAA
CGCAT - GCGTA
GGGAC - CCCTG
ACGGT - TGCCA
Explanation:
In DNA, A and T, also known as adenine and thymine pair together and G and C, also known as guanine and cytosine pair together due to the hydrogen bonds formed between the two bases.
Timothy is planning to leave home to go on a long trip. His mother told him to take his cell phone in case of emergency. What is one way that cell phone technology may not be beneficial in this situation?
Answer:
d) Timothy may not have cell phone service in some areas
Explanation: USA Test Preps
Your mental health will suffer if you use your phone excessively. The excessive use of mobile devices over time increases anxiety, loneliness, and low self-esteem. When mobile devices aren't available, dependence on them can also lead to annoyance, aggravation, and impatience. Thus, option D is correct.
What cell phone technology not be beneficial in situation?The causes of poor mobile phone signal can be divided into two groups: geographical distance from or obstructions between your phone and the nearest cell tower, and localized poor coverage caused by building materials or destructive interference.
It's not difficult to get a cell signal in a lifeless area. All you have to do is spend money on a signal booster for your cell phone. A cell phone signal booster enhances cell service and enables users to access services in locations with little to no service.
Therefore, Timothy may not have cell phone service in some areas.
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Which is a renewable source of energy
Answer:
Solar energy, oxygen, fresh water, and biomass.
Explanation:
There were no answer choices.
Hope this helps!
Brainliest is appreciated. :D
Explanation:
there are quite a few but since u did not give any question choices here are a few:solar,hydro,biomass,geothermal these are only some
Hope it helps!
The graph shows the axis of symmetry for a quadratic function f(x).
Which could be the function?
f(x) = (x + 4)2
f(x) = x2 + 4
f(x) = (x – 4)2
f(x) = x2 – 4
Answer:f(x) = (x-4)^2
Explanation:
Did it on a graphing calculator
We can find the line of symmetry for a quadratic equation using the formula; x = -b / 2a.
What is line of symmetry?The line of symmetry in a quadratic equation is a vertical line that cuts the parabola. The question is incomplete hence the graph is not shown here.
However, the line of symmetry is always a real number such that x = n. We can find the line of symmetry for a quadratic equation using the formula; x = -b / 2a.
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The amino acids for beta hemoglobin found in five animal species were compared to the amino acids found in human (Homo sapiens) beta hemoglobin. The number of sequence differences was recorded.
Based on the molecular data, what inference could you make about the anatomy of these species compared to human anatomy?
A) Anatomically, lemurs are most like humans.
B) Anatomically, gorillas are most like humans.
C) Anatomically, none of the species are similar to humans.
D) Anatomically, only the lemur differs from humans in any way.
Answer:
anatomically, gorillas are most like humans
Explanation:
Answer:
The correct answer is option B.
Explanation:
Hi!
Let's solve this!
According to the data, we will analyze each of the options:
A) Anatomically, lemurs are like humans. This option is incorrect.
B) Anatomically, gorillas are more like humans. This option is correct since gorillas and humans are similar
C) Anatomically, none of the species is similar to humans. This answer is incorrect since gorillas are similar to humans.
D) Anatomically, only the lemur differs from humans in some way. This answer is incorrect.
After the analysis, we conclude that the correct answer is option B.
What does population density measure?
the different species in a community
the number of individuals in a sample
the degree of crowding of a population
the area occupied by a population
Answer: the area occupied by a population
Explanation:
A population density can be define as the number of individuals of the population of a species living in per unit area over a particular time. Population density may vary depending upon the number of live births, deaths, number of immigrated and migrated members counted in concerned period of time.
Answer:
[tex]\boxed{\mathrm{the \ area \ occupied \ by \ a \ population}}[/tex]
Explanation:
Population density is a measurement of population per land area.
[tex]\displaystyle \sf population \ density =\frac{population}{land \ area}[/tex]
The population density of a place tells us whether the place occupied by the population is densely or sparsely populated.
Which of the following causes populations to shift most quickly from an exponential to a logistic population growth?a. favorable climatic conditionsb. removal of predatorsc. decreased death rated. competition for resources
I'm pretty sure its b or c
D. Competition for resources. Every population has a carrying capacity(the max amount of individuals a population can sustain). once reached, growth rate will plateau.
When you see an attractive person sit down next to you on the bus, the mad pounding of your heart is under the influence of the __________ nervous system?
Answer:
The correct answer is - autonomic nervous system.
Explanation:
The autonomous nervous system is a nervous system part that plays a role unconsciously in the body and maintains the functions of the body such as respiratory rate, urination, heart rate, sexual arousal and digestion, and other unconsciously occurring processes.
ANS is of two types sympathetic and parasympathetic both have opposite roles to each other. Sympathetic ANS are responsible for the increase in the heart rate in the influence of epinephrine and other hormones.
Thus, the correct answer is the Autonomic nervous system.
Gender stratification refers to the ranking of males and females according to their access to power, property, and prestige based on their sex.
True
False
Gender stratification refers to the ranking of males and females according to their access to power, property, and prestige based on their sex. false
In procedure b, which tube showed the most digestion of egg albumin? what can you conclude about the ph optimum of pepsin?
Answer:
Following incubation, the most digestion of egg albumin (protein) in exercise "B" occurred in tube 2. This shows that the enzyme pepsin has both a pH optimum (acidic) and a temperature optimum (37C).
What statement is true about the functions? Structure 1 is the stamen and Structure 2 is the pistil. Structure 1 is the stem and Structure is the waxy covering. Structure 1 is the pistil and Structure 2 is the fuzzy hair. Structure 1 is the waxy covering and Structure 2 is the stamen.
Answer:
Structure 1 is the stamen and structure is the pistil
Explanation:
Final answer:
The statement that is true about the functions is 'Structure 1 is the stamen and Structure 2 is the pistil.' These structures are central to the reproductive processes of a flower, with the stamen producing pollen and the pistil consisting of the stigma, style, and ovary.
Explanation:
The stamen and the pistil are key parts of a flower's reproductive system. The stamen, which is the male reproductive part, includes the filament and the anther where pollen is produced. The pistil, or gynoecium, is the female reproductive part of the flower, consisting of the stigma, style, and ovary. The stigma serves as the site for pollen deposition and is often sticky to capture pollen effectively. The style is a slender column that connects the stigma and the ovary, enabling the pollen tube to reach the ovary where fertilization takes place. Inside the ovary, ovules develop, which eventually become seeds after fertilization.
What transports oxygen in the blood? white blood cells plasma platelets red blood cells
Red blood cells transport oxygen in the blood.
Answer:
red blood cells
Explanation:
What is the definition of a dihybrid cross?
Answer:
Simply saying it is cross that involves two traits
Explanation:
In dihybrid cross the phenotypes of two genes are followed through the mating of individuals which carry multiple alleles at those gene loci. In other words, two genes controlling two different phenotypic traits are observed in dihybrid cross.
"Dihybrid cross",means
"di" indicates that there are two traits involved for example A and B and
"hybrid" indicates that each trait has two different allele, for example A and a or B and b.
A dihybrid cross is a genetic cross between two individuals that are heterozygous for two different traits.
In genetics, a dihybrid cross examines the inheritance patterns of two traits simultaneously. Each parent in the cross is heterozygous for both traits, meaning they possess two different alleles for each trait. The purpose of a dihybrid cross is to determine the probability of offspring inheriting various combinations of these traits, and it often follows Mendel's laws of independent assortment, which state that the alleles for different traits are distributed to sex cells (and offspring) independently of one another.
How has technology benefited energy production? A. It has provided for the use of alternate energy sources that have reduced impact on the environment. B. It has allowed for the use of energy sources that are renewable. C. It has allowed for the improvement of existing methods of producing energy. D. All of the above Please select the best answer from the choices provided A B C D
In my opinion and thought I would go with all of above just because so much has benefited from technology and it so happens all of the above has happened
Answer: A. It has provided for the use of alternate energy sources that have reduced impact on the environment.
Explanation:
The technology can be define as the collection of skills, methods and techniques that are required and used for the production of goods and services and to accomplish the objectives of the scientific research.
The major advantage of the technology is the innovation and improvisation of the alternate resources which can be used for the generation of energy. The energy harnessed by these energy sources does not liberate pollution to the atmosphere, biosphere and hydrosphere hence, the quality of the environment remains maintained.
Gene mutations can be passed on to future generations and drive natural selection. Choose the best description of how gene mutations are involved in evolution.
A. Gene mutations often skip generations, with advantageous traits showing up several generations after the gene mutation was first introduced.
B. All gene mutations are passed to future generations and over many generations will contribute to the evolution of new species.
C. Gene mutations can be dominant or recessive for an organism. Dominant genes will be adaptive for future generations, but recessive genes won't.
D. Gene mutations can be helpful, harmful, or neutral for an organism's survival. Only mutations that are helpful in the organism's environment would influence its survival and reproduction.
Answer:
D
Explanation:
Natural selection, which powers evolution, favors traits in a population that offers an advantage in an environment. Mutations on genes that give advantage will, therefore, be preserved while those that are deleterious will be eliminated. For these mutations to be passed down generations, they have to be borne in gametes.
"The correct option is D. Gene mutations can be helpful, harmful, or neutral for an organism's survival. Only mutations that are helpful in the organism's environment would influence its survival and reproduction.
To understand why option D is the best description of how gene mutations are involved in evolution, let's analyze each option:
A. Gene mutations often skip generations, with advantageous traits showing up several generations after the gene mutation was first introduced.
- This statement is not entirely accurate. While it is true that some gene mutations may not have an immediate effect and can be carried in a population for several generations before becoming prevalent, this is not a general rule for how gene mutations contribute to evolution.
B. All gene mutations are passed to future generations and over many generations will contribute to the evolution of new species.
- This statement is incorrect because not all gene mutations are passed on to future generations. Many mutations are neutral or harmful and may be eliminated from the population through natural selection. Only those mutations that confer some advantage are likely to be passed on and potentially contribute to the evolution of new species.
C. Gene mutations can be dominant or recessive for an organism. Dominant genes will be adaptive for future generations, but recessive genes won't.
- This statement is misleading. Whether a gene is dominant or recessive does not determine its adaptiveness. A recessive gene can be beneficial, harmful, or neutral, just like a dominant gene. The adaptiveness of a gene mutation depends on its effect on the organism's fitness in a given environment.
D. Gene mutations can be helpful, harmful, or neutral for an organism's survival. Only mutations that are helpful in the organism's environment would influence its survival and reproduction.
- This statement is the most accurate description of the role of gene mutations in evolution. Mutations that are beneficial (helpful) in a particular environment can increase an organism's chances of survival and reproduction, thereby passing those mutations on to future generations. This process of natural selection can lead to the accumulation of advantageous traits in a population over time. Neutral mutations may persist in the population without affecting fitness, while harmful mutations are likely to be selected against.
In summary, option D correctly captures the essence of how gene mutations contribute to evolution by influencing the survival and reproductive success of organisms based on the environmental context."
What is the meaning of photosynthesis as example.
Answer:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Explanation:
Plant get food and energy and animal get oxygen.
An ulcerated stomach lining often repairs itself once the source of inflammation has been eliminated. How is this possible?
a.) The tissue lining the stomach is an epithelium and thus capable of repair and renewal.
b.) The parasympathetic innervation of the stomach wall stimulates constant repair and renewal.
c.) The mucosa consists of a particularly vascular epithelium that facilitates efficient repair and renewal.
d.) All of the listed responses are correct.
Answer:
c.) The mucosa consists of a particularly vascular epithelium that facilitates efficient repair and renewal
a.) The tissue lining the stomach is an epithelium and thus capable of repair and renewal
Explanation:
The cells that form the lining of the stomach are deemed to wear out regularly due to the regular food intake they handle.
Due to this constant wearing, this cells have a mechanism of rejuvinating in order to handle their work.
Answer: Option A
Explanation:
The ulcerated stomach lining often repairs itself if the inflammation is removed this is because the tissue lining the stomach has the ability to repair and regenerate.
The healthy gut of the individual takes 2 to 3 weeks to generate the new lining of stomach which will help in treating the inflammation caused in the inner lining.
hence, the correct answer is option A
In some species of jellyfish, red pigment is dominant to orange pigment. Give the genotype and phenotype between a homozygous dominant jellyfish and one that is orange.
Answer:
If you are asking for the genotypes and phenotypes of the offspring of the jellyfishes the answers are
genotype: Rr (heterozygous dominant)
phenotype: red
Explanation:
A homozygous dominant jellyfish is represented by RR. An orange jellyfish is represented by rr.
A homozygous dominant jellyfish with red pigment would have the genotype RR and exhibit a red phenotype. An orange jellyfish, as the recessive phenotype, may have a genotype represented as oo, showing the orange pigment due to the absence of the dominant red allele. This scenario reflects Mendelian genetics rather than incomplete dominance.
Explanation:In the scenario where red pigment is dominant to orange pigment in jellyfish, a jellyfish with a homozygous dominant genotype for the red pigment would have the genotype of RR, where both alleles contribute to the expression of the red pigment, resulting in a red phenotype. An orange jellyfish, being the recessive phenotype, would have a genotype represented potentially as oo if we assume red is dominant to orange without intermediate expression (since the question does not specify incomplete dominance as in the flower examples provided). This scenario differs from incomplete dominance observed in some plants, where a heterozygous genotype results in a phenotype that is a blend of both parent phenotypes, such as the described pink snapdragons resulting from red and white parents.
Therefore, the genotype of the homozygous dominant jellyfish would be RR, indicating it produces a significant amount of red pigment and appears red. Conversely, the orange jellyfish, representing the recessive phenotype, would have a genotype that does not produce the red pigment, which could be represented as oo, thus expressing the orange pigment due to the absence of the dominant red allele.
Plants make their own food and are called producers. What do plants need to make their own food? A) soil, air and water B) soil, sunlight, and water C) sunlight, fertilizer, and water D) energy from the sun, air, and water
Answer:
D
Explanation:
A plant needs to use the energy from the sun to make glucose and other nutrients it needs. Air is needed for glycolysis and photosynthesis to occur. Water is needed by all living things to stay alive.
D because u need air water and sunlight for photosynthesis aka to make their own food
In which of the following cases does an atom have a positive charge?
A. There are more electrons than neutrons.
B. There are more protons than electrons.
C. There are more electrons than protons.
D. There are more neutrons than electrons.
Answer:
B. There are more protons than electrons.
Explanation:
When the number of protons is greater than that of the electrons, such an atom becomes positively charged.
An atom is made up of three main subatomic particles which are the protons, neutrons and electrons.
The electrons are negatively charged particles that moves round a central nucleus in an atom. They occupy the bulk of the volume in an atom. They are considered weightless relative the nucleons ie protons and neutrons.
The protons and neutrons are massive particles that occupy a tiny centre region in an atom. They are called nucleons and this is where the bulk of the mass of an atom concentrates. Protons have positive charges on them whereas neutrons have no charge on them.
In a neutral atom, the number of protons and electrons are thesame. Here, the positive charges cancels out the negative charges.
For a cation which is a positively charged ion, the number of protons are greater than the number of electrons. A cation must have lost an electron to have tripped the balance.
For anions which are negatively charged ions, the number of electrons are greater than those of protons.
Answer:
The answer is B
Explanation:
Who created the modern model of the solar system by discovering that the plantes move in elipses? a. Galileo c. Ptolemy b. Kepler d. Copernicus Please select the best answer from the choices provided
Answer:
B-Kepler
Explanation:
The correct answer is B. Kepler
Explanation:
Johannes Kepler was an important astronomer and mathematician during the 17th century mainly known for his proposals related to the planetary motion that was the base for modern models of the solar system as well as other works such as the theory of universal gravitation by Newton. In his theory, Kepler proposed three main laws that stated the orbit of planets were elliptical rather than perfectly circular, the orbital period dependent on the axis or longest diameter of the orbit and each orbit had two foci. Additionally, this model differs from Copernicus because Copernicus had proposed orbits were circular. Therefore, the astronomer that created the modern model of the solar system and discovered orbits were elliptical was Kepler.
People who have intermittent bouts of depression are less likely to get heart disease, atherosclerosis, hypertension, stroke, dementia, osteoporosis, and type ii diabetes.
a. True
b. False
B in my opinión i Believe it could be. What is this for ?
I think the answer is b
Which gas in Earth’s atmosphere helps living things make proteins?
oxygen
nitrogen
water vapor
carbon dioxide
Answer:
nitrogen
Explanation:
Answer:
B.) Nitrogen
Explanation:
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Which of the following is found inside a pollen grain?the female gametophyte,the male gametophyte,the megaspore,the sporophyte
Answer:
the male gametophyte
Explanation:
Pollen grains are structures in the seed plants (spermatophytes) which contain vegetative cells but also reproductive cells - microgametophytes. Microgametophytes produce 2 male gametes or sperm cells. Vegetative cells produce pollen tube which is involved in the transfer of sperm cells to the ovule (female structure that forms female gametes). Pollen grains are different in shape, size and color, but all of them are enveloped with hard coat that has protective role.
Under- and mal-nourishment, a major concern in developing countries can lead to increases in infection susceptibility. hiv infection. antibiotic resistance. type ii diabetes.
If the bark of the trees is dark and the moths that rest there are light, what might happen to the moths
Answer:
They might get eaten
Explanation:
They won't be able to camouflage on the tree
If the bark of the trees is dark and the moths that rest there are light, it is likely that the moths will be more visible to predators while they are resting on the trees.
What happens to light colored moths on dark trees?If the bark of the trees is dark and the moths that rest there are light, it is likely that the moths will be more visible to predators while they are resting on the trees. The contrast between the dark bark and the light-colored moths could make the moths more conspicuous, making them easier to spot by predators such as birds or other animals that prey on moths.
Additionally, the moths may be more vulnerable to being detected by predators while they are resting on the trees because they are not able to blend in with their surroundings as well as they would if they were resting on trees with lighter-colored bark. This could make them more likely to be preyed upon and could potentially lead to a higher mortality rate among the moths.
It is worth noting that this is just one possible scenario and there may be other factors at play that could affect the moths' vulnerability to predators. For example, the presence or absence of other forms of camouflage, the behavior of the moths, and the density of the moth population could all play a role in their vulnerability to predators.
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A population of coastal fish show signs of die-off when there are no known predators or environmental stressors in the area. What is the most likely explanation for what has happened to this population?
The population reached carrying capacity for the area.
The population evolved with a shorter lifespan.
The population reached its emigration period.
The population evolved with new eating habits.
Answer: the most likely case would be that population reached the carrying capacity of the area.
Explanation:
Explanation:First off the population of the prey that is the "coastal fish" In this case will increase in population and acquire a greater area for their survival and will start to (die-off).when the predators in an area are reduced or get extinct this change triggers a reaction called as "tropic cascade" in the ecosystem in which the change in the predator population has affects on the food web.
For example :when the wolves were eliminatefls from the American west, there were changes in the elk population and the vegetation the elk ate.
Therefore both preys and predators balance each other.
the study of the earth's air and weather is called ____
Answer:
the study of the earth's air and weather is called Meteorology.
Explanation:
Meteorology is the scientific study of the atmosphere that focuses on weather processes and forecasting.
Meteorological phenomena is observable weather and then explained by the science of meteorology.
Those events are bound by the variables that exist in Earth's atmosphere. These variables are temperature, pressure, water, and the gradients and interactions of each variable.
The majority of the observed weather is located in the troposphere of Earth.
Although meteorologists now use computer models it is still common to use techniques and conceptual models that were developed before computers.
The study of the earth's air and weather is known as meteorology, which involves predicting weather patterns and phenomena.
The study of the earth's air and weather is called meteorology. Meteorology is a branch of atmospheric science that focuses on the atmosphere and atmospheric phenomena to understand and predict earth's weather. Meteorologists use thousands of measurements, including air pressure and temperature, to generate weather forecasts. The related field of climatology examines climate, which encompasses averaged weather conditions over long periods, such as decades or centuries, focusing on patterns and effects on a broader temporal scale.