1. A cell does not need to use energy during
O active transport
exocytosis
O diffusion
O endocytosis
Answers
Answer:
The answer would be Diffusion because it does not require the use of energy
Related Questions
If snakes were removed from the food web, what would probably happen to the grasshopper population? A. The population of frogs and mice would decrease which would cause the population of grasshoppers to increase. B. The population of frogs and mice would decrease which would cause the population of grasshoppers to decrease. C. The population of frogs and mice would increase which would cause the population of grasshoppers to decrease. D. The population of frogs and mice would increase which would cause the population of grasshoppers to increase.
Answers
Answer: the population of frogs and mice would increase which would cause the population of grasshoppers to decrease
Explanation: I’m on the test right now and I’m looking at the web, the mice and frog get eaten by the snake, and the grasshopper get eaten by the frog and the mice, so if the mice and frog population increases the populating of the grasshopper would decrease :)
If snakes were removed from the food web, the population of frogs and mice would increase which would cause the population of grasshoppers to decrease.
Snakes predate on frogs and mice. Thus, if they are removed from the food chain, the population of frogs and mice would be less pressured and, therefore, thrive.
With the thriving population of frogs and mice comes the pressure on the population of grasshoppers. Frogs and some species of mice feed on grasshoppers.
Thus, if the population of frogs and mice thrives as a result of the absence of snakes, more grasshoppers will be eaten and the population of grasshoppers will decrease as a result.
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Found in both plant cells and animal cells, the________________surrounds and protects the cell, and allows certain chemicals to enter and exit the cell.
cell wall
cell membrane
cytoplasm
(This is 7th grade science).
Answers
Answer:
cell wall
Explanation:
The cell wall is the protective, semi-permeable outer layer of a plant cell
Answer:
cell membrane
Explanation:
cell membrane found in both plant cells and animal cells.
It is the outermost part of animalcell and second layer of plant cells.
Hope this answer help you
A population of water beetle lives in a small pond on a cattle range. During a severe drought, a herd of cattle accidentally drink up many water beetles from a water source, preventing the beetle's genes from being passed to future generations. Which of the following evolutionary mechanisms is represented by this scenario?
A.Gene Flow
B.Genetic Drift
C.Independent Assortment
D.Mutation
Answers
If there are 2 DNA molecules at the beginning of S phase, how many DNA molecules is there at end of S phase?
4
3
2
1
Answers
Answer:2 is your answer
A species of worm in which there are distinct male and female individuals is described as _________.
Answers
Answer:
A species of worm in which there are distinct male and female individuals is described as dioecious.
Explanation:
Why is a sidereal day longer than a solar day on Venus?
Answers
Answer:
The backwards rotation makes Venus the only planet in the solar system where the sidereal day is actually longer than the solar one. The sun returns to it highest point in the sky before the planet has completed one rotation. Combining all this together leaves Venus with a solar day that takes 117 Earth-days.
Explanation:
I have some great teachers. hope this helps!
In a rain forest, it is well known that 61% of water lizards have webbed-feet which provide the ability to walk on water. Furthermore, the gene for possessing webbed-feet is not hereditary and, thus, each water lizard is independent of others. A biologist randomly selects 25 water lizards from the rain forest. Let the random variable X count the number of water lizards out of the 25 who have webbed-feet. (a) State the distribution of the random variable defined above. (b) Compute the probability that exactly 17 of the 25 selected water lizards have webbed-feet. (c) Compute the probability that at least 17 of the 25 selected water lizards have webbed-feet. (d) Compute the mean and standard deviation for the number of water lizards out of 25 who have webbedfeet. Use both to describe the typical number of water lizards out of 25 who have webbed-feet. Report 6. Suppose the number of patients per week that visit a health center follows a Poisson distribution with a rate of 300 patients per week. Let the random variable X count the number of patients that visit the health center during a randomly selected week. (a) State the distribution of the random variable defined above. (b) Compute the probability that exactly 310 patients visit the health center during a randomly selected week. (c) Compute the probability that more than 280 patients visit the health center during a randomly selected week.
Answers
The distributions of the random variables in the given scenarios are (a) binomial for the water lizards and (b) Poisson for the health center visits. The probabilities can be calculated using the respective formulas for the corresponding distributions.
(a) The distribution of the random variable X, which counts the number of water lizards out of the 25 selected with webbed feet, follows a binomial distribution.
This is because each lizard can be considered as a Bernoulli trial (success: possessing webbed feet, failure: not possessing webbed feet) with a probability of success (p) equal to 61% or 0.61, and the trials are independent.
(b) To compute the probability that exactly 17 of the 25 selected water lizards have webbed feet, we can use the binomial probability formula.
The probability mass function (PMF) for the binomial distribution is given by P(X = k) = C(n, k) * p^k * (1-p)^(n-k), where C(n, k) represents the number of combinations of n items taken k at a time. Plugging in the values, we have P(X = 17) = C(25, 17) * 0.61^17 * (1-0.61)^(25-17).
(c) To compute the probability that at least 17 of the 25 selected water lizards have webbed feet, we need to calculate the cumulative probability from 17 to 25. This can be done by summing up the probabilities for each value of X from 17 to 25: P(X ≥ 17) = P(X = 17) + P(X = 18) + ... + P(X = 25).
(d) The mean (μ) and standard deviation (σ) for the number of water lizards out of 25 who have webbed feet can be calculated using the formulas for the binomial distribution.
The mean is given by μ = n * p, where n is the number of trials (25) and p is the probability of success (0.61). The standard deviation is given by σ = sqrt(n * p * (1-p)).
Moving on to the second scenario:
(a) The distribution of the random variable X, which counts the number of patients that visit the health center during a randomly selected week, follows a Poisson distribution.
This is because the number of patients per week can be modeled as a Poisson process, where events (patient visits) occur independently and at a constant average rate (300 patients per week).
(b) To compute the probability that exactly 310 patients visit the health center during a randomly selected week, we can use the Poisson probability formula.
The probability mass function (PMF) for the Poisson distribution is given by P(X = k) = (e^(-λ) * λ^k) / k!, where λ is the average rate of the Poisson process (300 patients per week) and k is the number of events we are interested in (310 patients).
(c) To compute the probability that more than 280 patients visit the health center during a randomly selected week, we need to calculate the cumulative probability from 280 to infinity. This can be done by summing up the probabilities for each value of X from 280 to infinity: P(X > 280) = P(X = 281) + P(X = 282) + ... + P(X = ∞).
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why are cells growing on top of each other even if they have space in culture flask
Answers
Answer:in culture plates cell density of the edges is often more than the center of the dish,
what causes this distribution?
Explanation:
Which forces of evolution add new genetic variation to a population that did not exist in that population before
Answers
"Mutation and gene flow are forces of evolution that add new genetic variation to a population that did not exist before."
Mutation and gene flow are two forces of evolution that introduce new genetic variation into a population.
The mutation is the ultimate source of genetic variation. It refers to changes in the DNA sequence of an organism's genome. Mutations can occur spontaneously or due to environmental factors, errors in DNA replication, or exposure to mutagenic agents. These changes can lead to the creation of new alleles or variations in existing alleles, introducing novel genetic diversity into a population.
Gene flow, on the other hand, occurs when individuals or their genes move between populations. It can happen through migration or interbreeding between individuals from different populations. Gene flow introduces new genetic material and alleles from one population to another, increasing genetic variation within the recipient population.
Both mutation and gene flow are important mechanisms for introducing new genetic variation into a population, which can fuel evolutionary processes such as natural selection and genetic drift.
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A particular gene has two alleles, a dominant allele A and a recessive allele a. The frequency of allele A is 0.55 . If the population is in Hardy-Weinberg equilibrium with respect to the gene, then what is the expected frequency of genotype Aa?
Answers
Answer:
0.495
Explanation:
because i did the question
the first evidence for nucleosome formation came from digesting chromosomal dna with a non-specific nuclease. gel electrophoresis of the dna after the reaction revealed:
Answers
The first evidence for nucleosome formation came from digesting chromosomal DNA with a non-specific nuclease. Gel electrophoresis of the DNA after the reaction revealed a ladder-like pattern of DNA fragments, indicating the presence of repeating units, which were later identified as nucleosomes.
Gel electrophoresis is a laboratory technique for separating DNA, RNA, or protein mixtures based on molecular size. An electrical field pushes the molecules to be separated through a gel with microscopic holes in gel electrophoresis. The molecules move through the pores in the gel at a rate that is proportional to their length. This indicates that a little DNA molecule will move further across the gel than a larger DNA molecule will. The gel electrophoresis of the DNA after digestion with a non-specific nuclease revealed a ladder-like pattern, indicating that the DNA was fragmented into multiple sizes. This pattern was consistent with the formation of nucleosomes, which are comprised of DNA wrapped around histone proteins, and suggested that the chromosomal DNA had been organized into repeating units of nucleosomes.
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How are bacterial cells and human cells alike?
1. They allow oxygen through the cell wall.
2. They allow carbon dioxide through the cell wall.
3. They allow nutrients through the cell membrane.
4. They allow nutrients through the nuclear membrane.
Answers
Answer:4
Explanation:
Answer:
they allow nutrients through the nuclear membrane
Explanation:
that is how they r alike
Which of the following is NOT a main component of an amino acid structure?
a. lone hydrogen
b. side R variant group
c. carboxyl group
d. phosphate group
e. amino group
Answers
The answer is D) phosphate group.
Amino structures do not have a phosphate group.
Hope this helped. :)
what is the role of pancreas in digestion
Answers
Answer:
Explanation:
The pancreas is a glandular organ in the digestive system and endocrine system located in the abdominal cavity behind the stomach. It is an endocrine gland producing several important hormones, including insulin, glucagon, somatostatin, and pancreatic polypeptide, all of which circulate in the blood.
Dihybrid Punnett Square Homework 1 Susan and Tim both have red hair which is recessive to brown hair. Susan is heterozygous for dimples(dominant) and Tim has no dimples. Create a Punnett square that shows the genotypes of all the possible offspring that could result from Tim and Susan! Use R or r for hair color. Use D or d for dimples or no dimples. What is the genotypic percentage? What is the phenotypic percentage?
Answers
Answer:
1222
Explanation:
121
the muscle is stretched by passively extending the elbow, wrist, metacarpophalangeal, and proximal interphalangeal joints while maintaining the forearm in full supination.
Answers
The flexor digitorum superficialis muscle is stretched by passively extending the elbow, wrist, metacarpophalangeal, and proximal interphalangeal joints while maintaining the forearm in full supination.
The flexor digitorum superficialis (FDS) is the largest muscle of the forearm. It is an extrinsic hand muscle. FDS is innervated by the median nerve and also sometimes from the anterior interosseous nerve (AIN).
Forearm is the part of the upper limb that extends from the elbow to the wrist. It is composed of the bones radius and ulna. It is also called the lower arm. It us able to perform supination, i.e. rotate so that the palm of the hand can be moved upward or downward.
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Drag one of the nucleotides to a corresponding nitrogenous base on one of the two strands. What is
the role of DNA polymerase in this process?
Answers
Answer:
This enzyme is responsible for the production of DNA molecules from RNA molecules.
Explanation:
DNA polymerase is a type of enzyme that produces DNA molecules from RNA molecules. The enzymes play a vital role in the replication of DNA in which the enzyme produces two identical copies of DNA from one original DNA molecule. This replication of DNA is very important for cell division as well as growth of the organisms. Without this replication, no mitosis occurs in the body that leads to no growth of the organism so we can say that this enzyme plays a great role in growth of an organism.
The process of the formation of the new from the old DNA is called is replication.
The enzyme responsible for the formation of DNA replication is DNA polymerase.
The things required in the formation of new DNA is as follows:-
DNADNA polymeraseDNA ligaseThe function of the DNA polymerase during the time of DNA replication is to get the nucleotide as a monomer to join together by the DNA ligase. The nucleotide joins together in the 5' to 3' direction.
The drag of one nucleotide from the sequence leads to the mutation. These lead to the form of the infected protein and form the abnormal character.
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California, a city that is far inland, such as Sacramento, is typically warmer than a city near the coast, such as San Francisco agree or disagree why
Answers
The influence of the ocean is what make Sacramento much warmer in contrast to California.
Why is Sacramento warmer?Inland cities, such as Sacramento, are typically warmer than cities near the coast, such as California , because they are farther away from the cooling influence of the ocean. The ocean has a moderating effect on temperature, which means it can help to keep temperatures cooler in coastal areas.
In contrast, inland cities can experience more extreme temperatures because they are not protected by the ocean's cooling influence. Additionally, the temperature in inland cities is often affected by the "heat island" effect, which is when urban areas experience higher temperatures due to the concentration of human-made structures and surfaces that absorb and retain heat.
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54. A change in the shape of the enzyme which in turn changes the function of the
enzyme
Answers
Answer:
proteins change shape
Explanation:
because so much of the enzyme activity is based on shape,temperature can mess all the enzyme work
delayed patterns of n availability in low external input (lei) cropping systems may favor crops over weeds because_____.
Answers
Delayed patterns of N availability in low external input (LEI) cropping systems may favor crops over weeds because small-seeded weeds need more nutrients at early-growth stages than large-seeded crops.
Nitrogen (N) is an essential nutrient for plant growth. It is involved in many important processes, such as photosynthesis, protein synthesis, and chlorophyll production.
Low external input (LEI) cropping systems are agricultural systems that rely on natural processes and biological inputs, rather than synthetic fertilizers and pesticides.
Delayed patterns of N availability in LEI cropping systems means that the amount of N available to plants is not constant throughout the growing season.
Small-seeded weeds are more likely to be affected by delayed patterns of N availability than large-seeded crops. This is because small-seeded weeds need more N at early-growth stages in order to germinate and establish themselves.
Large-seeded crops, on the other hand, have larger seed reserves and are therefore more able to tolerate periods of low N availability.
As a result of delayed patterns of N availability, LEI cropping systems may favor crops over weeds. This is because crops are more able to tolerate periods of low N availability than weeds. This can help to reduce weed competition and improve crop yields.
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which of the following is true concerning maslow’s theory?
Answers
Abraham Maslow was an American psychologist who proposed Maslow's hierarchy of needs as a part of his study of human motivation. This theory is based on the idea that people have various needs, which can be organized into a hierarchical structure is (D). Effective managers recognize ways to help people satisfy their needs
Maslow's theory has five levels of needs, and he believed that people needed to fulfill each level of needs before progressing to the next level.
A. People are motivated to satisfy needs at various levels in no particular order:
It is incorrect concerning Maslow's theory. According to Maslow's theory, people are motivated to fulfill their needs from the bottom of the hierarchy to the top. People can't fulfill their higher-order needs without fulfilling their basic needs first. Hence, the needs must be fulfilled in a particular order, starting with the physiological needs, then safety needs, social needs, esteem needs, and self-actualization needs.
B. Maslow recognized eight levels of human needs:
It is incorrect concerning Maslow's theory. Maslow's hierarchy of needs consists of five levels of needs, which are physiological needs, safety needs, social needs, esteem needs, and self-actualization needs.
C. Most people in U.S. society have satisfied all their levels of needs:
It is incorrect concerning Maslow's theory. Maslow's hierarchy of needs states that people must fulfill each level of needs before they can progress to the next level. Thus, people continue to move up the hierarchy throughout their lives, and it is unlikely that someone has satisfied all their needs.
D. Effective managers recognize ways to help people satisfy their needs:
It is correct concerning Maslow's theory. Managers should identify their employees' needs, starting from their basic needs, to enhance their job satisfaction and productivity. Effective managers recognize that their employees' needs are diverse and that they must provide a supportive and collaborative work environment to meet their needs. They also appreciate the fact that everyone has different needs and motivation levels and take them into account while planning strategies for achieving objectives. The correct answer is D.
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During prometaphase, which protein complex on each sister chromatid attaches to the spindle?.
Answers
Each sister chromatid uses a protein complex termed the kinetochore to connect to spindle microtubules at the centromere.
Sister chromatids are bound to one another during mitotic prometaphase, but why?Cohesion is necessary for sister chromatids to stay together during mitosis and meiosis until separation is about to occur at anaphase. Cohesins are multiprotein component complexes that help create cohesion during DNA replication prior to mitosis and meiosis.
During prometaphase, where do microtubules bind to sister chromatids?kinetochoresThe production of a protein structure known as a kinetochore around the centromere, the central region connecting the sister chromatids, is another significant process that occurs during prometaphase. Kinetochore microtubules are lengthy protein filaments that extend from the cell's poles at each end and connect to the kinetochores.
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When an individual perceives an event (stressor) as stressful, the _____________ controls the activation of the endocrine system and the (autonomic) nervous system?
Answers
Answer: hormones
Explanation: It uses hormones to control and coordinate your body's metabolism, energy level, reproduction, growth and development, and response to injury, stress, and mood in your body.
Compare the viking 1 and 2 probes to the pathfinder probe that landed on mars in 1997. How was their technology different?
(this is a earth space science class)
Answers
The Viking 1 and 2 probes were NASA's first missions to Mars, launched in 1975. They were designed to study the planet's atmosphere and search for signs of life. The Viking probes were equipped with cameras, spectrometers, and other instruments to gather data and images.
In contrast, the Pathfinder probe that landed on Mars in 1997 was more advanced in terms of technology. It had a rover, Sojourner, that was able to explore the surface and transmit images and data back to Earth. The Pathfinder also had an improved communication system, allowing for faster transmission of data. The Pathfinder mission paved the way for future Mars missions, including the more recent Curiosity and Perseverance rovers.
Overall, the technology used in the Viking probes was more limited compared to the Pathfinder probe, which utilized more advanced technology for exploration and data transmission.
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Which of the following is a method used to obtain the relative age of a rock or fossil?
a
Decay rates
b
Radiometric dating
c
Superposition
d
Uniformitarianism
i know its not radiometric dating
Answers
Answer:
Radiometric dating
Explanation:
What is the total surface area of a human lung
Answers
Answer:
the total surface area of a human lung IS 70 TO 75 square meters
Explanation:
Estimates of the total surface area of lungs vary from 50 to 75 square metres (540 to 810 sq ft); although this is often quoted in textbooks and the media being "the size of a tennis court"
Answer:
50 to 75 square meters
Explanation:
Why are meerkats affected by the plant population?
Answers
Answer:
They largely depend on it for survival as meerkats are omnivores.
Explanation:
The combined effects of hotter and drier summers and fewer plants would threaten the persistence of the meerkat population. Since they eat plants and other living bugs that usually hang out in plant-abundant areas, their [meerkats] survival depends on the range of plants near them.
The image of a slide of onion epithelial tissue observed with the low-power objective of a
compound microscope appears light and somewhat fuzzy. Which parts of the microscope should be used to improve the focus?
coarse adjustment and ocular
fine adjustment and diaphragm
ocular and nosepiece
diaphragm and 40x objective
Od
Answers
Answer:
Fine adjustment and diaphragm
Explanation:
Look at the food web below. In the diagram, the producers are at the bottom of the food web that the consumers feed off of. Predict what would happen to the ocean food web if a natural or man-made disaster impacted the producers (phytoplankton).
Answers
When a sudden change occurs in one of the populations in a food web, it affects the whole equilibrium. According to the cascade effect, if a natural or man-made disaster impacted the producers, the whole food web will be negatively affected. All species will decrease in their population size.
What is a food web?
Food webs are complex nets composed of several organisms through which energy can flow. Food webs are arranged in levels, and the organisms placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
The first link corresponds to a producer organism -autotroph-.The following links are the consumers -heterotrophs-: herbivores and carnivores.The last links are the decomposers that degrade organic matter from dead organisms.Because it is a net (web), all organisms are in equilibrium until a change occurs. When a sudden change affects any of the involved links, there can be a cascade effect on the web.
Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
In the provided image, we can see the only producer is phytoplankton, which means that directly or indirectly, all the following individuals depend on this species.
If any disaster impacted phytoplankton, it would decrease its population size. The fewer phytoplankton, the less food there will be for zooplankton and flying fishes. Consequently, these species would decrease their population size because their food source was affected.The decrease in zooplankton would also affect striped fish. If there are fewer flying fish and stripped fish available, it will have negative consequences on the tuna that feed on them, and eventually, tuna's population size will decrease as well. Finally, the last affected individuals would be sharks and seals, since they feed on tuna. The decrease in available tuna means a decrease in shark and seal populations.According to the cascade effect, if a natural or man-made disaster impacted the producers, the whole food web will be negatively affected. All species will decrease in their population size.
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Put the events in the correct order.
(1. Decomposers increase oxygen consumption) (2. Algae consume the
available nutrients and then begin to die off) (3. Decomposers break down
algae and increase in number) (4. An algal bloom occurs)
Answers
Answer: 3
Explanation: