Question 10 Xylem A move water more quickly than tracheids, and evolved more recently in flowering plants. Most plant epidermis layers are covered by a layer. Phloem Cortex Cuticle Mesophyll
Answers
Most plant epidermis layers are covered by a cuticle. Thus, "cuticle" is the correct answer.
The cuticle is a waxy, waterproof layer that covers the epidermis of most plant leaves, stems, and other aerial parts. It is composed of cutin, a complex polymer that helps reduce water loss through evaporation. The cuticle serves as a protective barrier against external factors such as pathogens, UV radiation, and excessive transpiration. Additionally, the cuticle helps to prevent dehydration by limiting the movement of water out of the plant's tissues. It is an essential adaptation for plants living in diverse environments, allowing them to retain moisture and maintain optimal physiological functioning.
Therefore, cuticle is the correct response.
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What determines the chemical properties and physical properties of a mineral? A. the specific gravity of the mineral. B. the location where it was found. C. the arrangement of the mineral's atoms. D. the conditions under which the mineral formed. ??????
Answers
Answer:
C. The arrangement of the mineral's atoms.
Explanation:
The arrangement of something's atoms both defines its physical properties, as well as how it will chemically react with other substances. Hope this helps!
Tasha went on a trekking expedition to a mountain range during her vacation. When she reached a particular elevation, it started raining heavily. Which sphere of Earth is most responsible for this sudden weather change?
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The atmosphere, which is the layer of gases surrounding the Earth, is most responsible for sudden weather changes such as heavy rain. It plays a crucial role in regulating and distributing weather patterns, including the formation of precipitation.
The atmosphere is the layer of gases surrounding the Earth, and it plays a crucial role in weather patterns and changes. It consists of various components, including water vapor, clouds, and air currents.
When Tasha reached a particular elevation in the mountain range and it started raining heavily, it indicates a significant change in weather conditions.
As Tasha ascended to higher elevations, she entered different layers of the atmosphere, which can have varying temperatures, humidity levels, and air pressure. These factors contribute to the formation of clouds and precipitation.
When the air rises along the mountain slopes, it cools down, causing the water vapor present in the air to condense and form clouds. Eventually, these clouds release rain or other forms of precipitation, resulting in the sudden heavy rainfall that Tasha experienced.
Therefore, the atmosphere, with its composition and dynamics, is primarily responsible for the sudden weather change Tasha encountered during her trekking expedition in the mountain range.
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Jet lag is associated with changes to your ; and is best helped by Circadian rhythms; exposure to sunlight Inner ear pressure; chewing gum Circadian rhythms; sleeping when tired Inner ear pressure; ear plugs
Answers
Jet lag is associated with changes to your circadian rhythms and is best helped by adjusting sleep patterns according to the new time zone, option C is correct.
Exposure to sunlight can also assist in resetting the body's internal clock. The options of inner ear pressure with chewing gum and inner ear pressure with ear plugs are not directly related to managing jet lag. Instead, the focus should be on regulating circadian rhythms and adapting sleep schedules to the destination time zone. By aligning sleep patterns and exposure to natural light, individuals can minimize the effects of jet lag and facilitate faster adjustment to the new time zone.
Additionally, there are other strategies that can aid in reducing the impact of jet lag. These include staying hydrated by drinking plenty of water throughout the journey, avoiding excessive consumption of alcohol and caffeine, and engaging in light physical activity during the flight or upon arrival at the destination, option c is correct.
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The complete question is:
Jet lag is associated with changes to your______and best helped by_____
A.Circadian rhythms; exposure to sunlight
B.Inner ear pressure; chewing gum
C.Circadian rhythms; sleeping when tired
D.Inner ear pressure; ear plugs and is best helped by
what virulence factor of staphylococcus aureus was most relevant to the development of the vesicular lesions and the peeling skin experienced by the babies in the case study?
Answers
The answer is exfoliative toxin. Exfoliative toxins (ETs) are virulence factors produced by certain strains of Staphylococcus aureus bacteria.
They cause staphylococcal scalded skin syndrome (SSSS), a serious skin disease characterized by the development of vesicular lesions and peeling skin. The bacteria produce two types of exfoliative toxins, ETA and ETB, both of which are serine proteases that cleave desmoglein 1 (DSG1), a cell adhesion protein in the epidermis.
Exfoliative toxin A (ETA) is the most common cause of SSSS. It is encoded by the eta gene located on a mobile genetic element called staphylococcal cassette chromosome (SCC) that can be transferred between bacteria by horizontal gene transfer. ETA is synthesized as a 27-kDa inactive proenzyme (pre-ETA), which is activated by proteolytic cleavage into a 26-kDa mature toxin (m-ETA) that is secreted from the bacterial cell.
M-ETA then binds to the extracellular domain of DSG1 on the surface of epidermal keratinocytes and cleaves it at a specific site between amino acids 194 and 195, leading to loss of cell adhesion and the formation of intraepidermal clefts that cause the characteristic blistering and peeling of the skin.
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Diffuse input to the cortex relaying through the thalamus, from what area, keeps the cortex active during wakefulness?
a. cerebellum
b. basal ganglia
c. reticular formation
d. spinal cord
Answers
The reticular formation area's diffuse input to a cortex, relayed by the thalamus, maintains the cortex active throughout awake.
The hypothalamus and brain stem, situated at the bottom of the brain, collaborate to regulate when people are awake and asleep.The Ch5-Ch6 neurons' effects on arousal, attention, and sleep are thought to be partially mediated via the reticular activating system, which is conventionally linked to the thalamic intralaminar and reticular nuclei.Visceral, somatic, & sensory systems all provide information to the RAS. This system uses acetylcholine, serotonin, noradrenaline, dopamine, histamine, and hypocretin as neurotransmitters. The cerebellum may play a role in controlling sleep and/or wakefulness because cerebellar dysfunction can cause sleep disturbances such excessive daytime sleepiness.
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What happens when human DNA is inserted into a bacterial plasmid?
Answers
Answer:
creates a so-called recombinant plasmid
Researchers can insert DNA fragments or genes into a plasmid vector, creating a so-called recombinant plasmid. This plasmid can be introduced into a bacterium by way of a process called transformation. Then, because bacteria divide rapidly, they can be used as factories to copy DNA fragments in large quantities.
What is inserting a human gene into a bacterial plasmid?
Recombinant DNA is a technology scientist developed that made it possible to insert a human gene into the genetic material of a common bacterium.
What is it called when DNA is inserted into a plasmid?
In a typical cloning experiment, researchers first insert a piece of DNA, such as a gene, into a circular piece of DNA called a plasmid. This step uses restriction enzymes and DNA ligase and is called ligation.
Thus, by inserting human DNA into a bacterial plasmid, bacteria divide rapidly and they can be used as factories to copy DNA fragments.
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I need help I just keep si g different answers to this question
Answers
Answer:
I think your right the first one
Explanation:
♀
What is a model that uses DNA comparisons to see how long two different organisms have been evolving independently from each other?A. molecular clock hypothesisB. phylogenetic treeC. cladogramD. evolutionary tree
Answers
A model that uses DNA comparisons to see how long two different organisms have been evolving independently from each other is referred to as molecular clock. It makes use of a genetic material that go through mutation. This is used to calculate the time of evolution between two different organisms.
A phylogenetic tree is also called as evolutionary tree. It is a diagram used to illustrate the lines of evolutionary descent of various species from a common ancestor. A cladogram is is a diagram that illustrate the relationships of various froups of taxa.
Answer - A. molecular clock hypothesis
i need help answering these questions
Answers
Answer: A
Explanation:
What can be detected by using SIM medium? (Check all that apply)
a. Tryptophan degradat b. Mannitol fermentation c. Inositol fermentation d. H25 production
e. Motility
Answers
SIM (Sulfide Indole Motility) medium can detect the presence of tryptophan degradation, H2S production, and motility.
Answer choices a, d, and e are correct. SIM medium is a selective and differential medium used in microbiology to detect specific characteristics of microorganisms. Tryptophan degradation can be detected by observing the production of indole, which is indicated by a red color after the addition of Kovac's reagent. H2S production can be detected by the formation of a black precipitate when the organism metabolizes sulfur-containing amino acids. Motility is assessed by observing the spreading of growth throughout the medium from the inoculation line.
Answer choices b and c are incorrect. Mannitol and inositol fermentations are not characteristics that can be directly detected using SIM medium. Different media and specific tests are used to detect these fermentations, such as Mannitol Salt Agar for mannitol fermentation and Inositol Iron Agar for inositol fermentation.
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9. What organisms perform denitrification?
Answers
Answer:
Thiobacillus denitrificans, Micrococcus denitrificans, and some species of Serratia, Pseudomonas, and Achromobacter.
Explanation:
Development of multiple SNP marker panels affordable to breeders through genotyping by target sequencing (GBTS) in maize.
Answers
Development of multiple SNP marker panels affordable to breeders through genotyping by target sequencing (GBTS) in maize : SNP of interest.
What is SNP?
SNPs (pronounced "snips"), also known as single nucleotide polymorphisms, are the most prevalent form of genetic variation in humans. Each SNP is a variation in a single nucleotide, the basic unit of DNA. In a specific section of DNA, an SNP might, for instance, swap out the nucleotide cytosine (C) with the nucleotide thymine (T).
SNPs typically occur all over a person's DNA. There are around 4 to 5 million SNPs in an individual's genome, which implies they typically occur almost once every 1,000 nucleotides. Many people have these variants; nevertheless, for a variation to be called an SNP, it must be present in at least 1% of the population. More than 600 million SNPs have been discovered by researchers in human populations worldwide.
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What is the most likely cause of the coral bleaching shown below?
(A) Increased storm intensity
(B) Abnormally high-water temperatures
(C) Ocean acidifications
(D) Excess nutrients
Answers
Abnormally high-water temperatures is the most likely cause of the coral bleaching shown below and is denoted as option B.
What is Coral bleaching?
This is defined as the process in which corals turn white due to stressors such as temperature etc.
The most cause of bleaching in corals is high temperature due to climate change experienced in the world.
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A man and woman have a son who is color blind, a recessive sex-linked trait carried on the X chromosome, but neither parent is color blind. The woman is now pregnant with their second child. Which of the following statements is true about the second child?
A daughter will be color blind because the father is a carrier of the recessive allele.
A son will be color blind because the mother is a carrier of the recessive allele.
A daughter will not be color blind because the father is not a carrier of the recessive allele.
A son will be color blind because the father's mother must have been a carrier for recessive allele.
Answers
Answer:
B. A son will be colour blind because the mother is a carrier of the recessive allele.
Answer: The answer is B
Explanation: The son will be color blind because the mother is a carrier of the recessive allele.
Hope this was helpful
Of the following, which is NOT considered to increase the risk of developing cancer for humans?Select one:a.ultraviolet lightb.toxic chemicalsc.regular exercised.smoking
Answers
Answer is C.
Explanation: Exercise is good for the body. It helps regu
Many things are dissolved in our blood, like vitamins, minerals, salts,
oxygen etc. Like blood, WATER is also wonderful at dissolving many
substances (salt, sugar, oxygen, etc.). Which of the following properties of
water refers to water's ability to dissolve so many substances?
A: water has high heat of vaporization
B: water is cohesive
C: water is the universal solvent
D:water has high specific heat
Answers
Answer:
C
Explanation:
blablallalalallalalallalallallalalalalall
State the type of hypothesis test to be used for One Sample Z Test for Means of the given below:
In a certain city, there are about one million eligible voters. A simple random sample of size 10,000 was chosen to study the relationship between gender and participation in the last election. The results were:
Men Women
Voted 2,792 3,591
Did not vote 1,486 2,131
Does there appear to be a relationship between gender and participation in the last election?
Answers
Answer:A simple random sample of size 10,000 was chosen to study the relationship between gender and participation in the last election.
Explanation:
You will either reject or fail to reject the null hypothesis, thus determining if there appears to be a relationship between gender and participation in the last election.
To conduct a Chi-Square Test for Independence, follow these steps:
1. State the null hypothesis (H0): There is no relationship between gender and participation in the last election.
2. State the alternative hypothesis (H1): There is a relationship between gender and participation in the last election.
3. Create a contingency table with the given data:
Men Women Total
Voted 2,792 3,591 6,383
Did not vote 1,486 2,131 3,617
Total 4,278 5,722 10,000
4. Calculate the expected counts for each cell in the table.
5. Compute the Chi-Square test statistic by comparing the observed and expected counts.
6. Determine the degrees of freedom (df): (number of rows - 1) * (number of columns - 1) = (2-1)*(2-1) = 1
7. Find the critical value and p-value for the Chi-Square test statistic and the chosen significance level (e.g., 0.05).
8. Compare the test statistic to the critical value or p-value to the significance level to make a conclusion.
Based on the results, you will either reject or fail to reject the null hypothesis, thus determining if there appears to be a relationship between gender and participation in the last election.
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____ are relatively large myelinated neurons that conduct neural impulses at about 15 to 30 meters per second.
Answers
The answer is "A-alpha fibers."A-alpha fibers are relatively large myelinated neurons that conduct neural impulses at about 15 to 30 meters per second.
What is a myelinated neuron?
Myelin is an insulating layer surrounding an axon, which allows quicker and more efficient neural impulses to be sent. Myelination is the process of adding myelin to a neuron's axon. Neurons are nerve cells that transmit information in the brain, spinal cord, and peripheral nervous system, and the myelin sheath insulates and protects them.A-alpha fibers are involved in muscle contraction and proprioception, which is the sense of knowing where one's body is in space. A-alpha fibers are the fastest and most heavily myelinated neurons in the body, allowing them to conduct neural impulses at high speeds.
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I will give branliest and 15 points
4. Find out mismatched pair.
I) Lavoisier - Oxygen
2) Joseph Black - Hydrogen
3) Priestley - Belljar
Answers
Answer:
........................
Match each vocabulary word with its definition.
1. nucleus
A. the process of burning in the presence of oxygen
2. solar energy
B. a nucleus surrounded by electrons
3. combustion
C. a process that splits the atom
4. atom central
D. part of an atom
5. fission
E. capacity for doing work
6. photosynthesis
F. process that plants produce sugar
7. energy
G. energy from the sun
Answers
Answer:
1D 2G 3A 4B 5C 6F 7E
Explanation:
Im sorry if this is wrong. I tried :')
scientists studying the blind cave-dwelling fish astyanax mexicanus hypothesized that this fish evolved from a surface-dwelling fish. if this is true, which part of a. mexicanus anatomy is most likely to be a vestigial structure?
Answers
Eyes , Vestigial structures include the human appendix, a snake's pelvic bone, and the wings of flightless birds. Vestigial structures can be harmful, although they are usually innocuous; nonetheless, these structures, like any other structure, require extra energy and are susceptible to illness.
Structures that are no longer functional. A structure that may have had an important role in the progenitors of a species but no longer serves any use in the contemporary species. The shared ancestor of new, distinct species that emerged from a single population.
Vestigial structures are structurally similar to fully functional structures acquired by kindred lineages. As a result, they give strong evidence of shared ancestry and can aid in tracing the evolutionary origins of the species through the use of vestigial features.
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fish is high in omega-3 fatty acids, which are most beneficial for the __________ as mentioned in the video.
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Based on the information given, it should be noted that omega-3 fatty acids is found in fishes and this is essential for the heart.
Omega-3 fatty acids are typically found in seafoods such as fatty fish, she'll fish, crabs, oysters, etc. They are vital on maintaining a healthy body.
It should be noted that omega-3 fatty acids are key to the structure of the cells that we have in our bodies. They're also a source of energy and vital for the heart and lungs.
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The ability to use old cells is an advantage of _____.hybridization DNA testingrestriction fragment length polymorphism (RFLP) polymerase chain reaction (PCR) all DNA testing procedures
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The ability to use old cells is an advantage of all DNA testing procedures.
is this correct? 10 points
Answers
Answer:
Explanation: first one is wrong it is gray and the second one is right
Answer:
12 is for sure correct
Explanation:
but 11 could be tan or grey i would say grey bc they where good and still are but they went down where now grey is taking over and adapting great to the new environment so i would say grey over tan but your choice
Question in the photo
Answers
Answer:
C
Explanation:
From reading what the process is, I think the answer should be C. The definition always says that you get energy from a chemical reaction and the products are CO2 and water. That can only mean that you have a hydrocarbon burning.
Chemically it looks like
C6H12O6 + 6O2 ====> 6CO2 + 6H20
A biologist recorded a count of 516 bacteria present in a culture after 10 minutes and 1136 bacteria present after 20 minutes To the nearest whole number, what was the initial population? bacteria TIP Enter your answer as an integer or decimal number. Examples: 3,-4,5.5172 Enter DNE for Does Not Exist, oo for Infinity Get Help: Written Example Points possible: 1 This is attempt 1 of 3 Post this question to forum Submit DOLC If the population doubles every six minutes, then it doubles 10 times every hour, so the model is: P(t) = 5 - 2104 After 2 hours: P(t) 5.2106 P(2) = 5.210-2 P(2) 5. 220 P(2) 5242880 Alternatively, we can solve it in a different way by using the formula f(t) = Ageht. First note that if it doubles 10 times every hour, then after 1 hour there will be 5120 bacteria. Now solve for k: 5120 = 5e" 1024 = el k 6.9315 So the model is: f(t) = 526.93154 After t hours: P(2) — 56.9315-2 P(2) = 5e13.863 P(2) 5.1048635.1296 P(2) 5243175.6
Answers
Explanation: The Germ Theory.
please help answer this quickly
Answers
Answer:
wow l like question... l love fish thank u
Answer:
Your answer is D
Hope this helps!
The Three Domain classification system developed by Dr. Woese is based partly on
O sensitivity to antivirals.
O RNA sequences.
O enzyme similarities.
O DNA sequences.
Answers
Dr. Woese's three Domain classification approach is partially based on RNA sequences. The three-domain classification system was put forward as an alternative to the conventional prokaryote-eukaryote and five-kingdom concepts.
Organisms can be divided into one of three domains according to differences in the ribosomal RNA (rRNA) nucleotide sequences, antibiotic susceptibility, and membrane lipid structures. Woese divided them into groups based on differences in the 16S ribosomal RNA (rRNA) structure. Carl Woese from the University of Illinois in the United States proposed a phylogenetic taxonomy of bacterial species in 1987 using variations in the nucleotide sequence of 16S rRNA molecules.
Thus, we can conclude that RNA sequences serve as a foundation for some of Dr. Woese's Three Domain classification methods. Eukarya, Bacteria, and Archaea are the three domains.
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"In a test of the effectiveness of garlic for lowering? cholesterol, 49 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes? (before minus? after) in their levels of LDL cholesterol? (in mg/dL) have a mean of 0.1 and a standard deviation of 15.4. Use a 0.10 significance level to test the claim that with garlic? treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic?treatment? Assume that a simple random sample has been selected. Identify the null and alternative? hypotheses, test? statistic, P-value, and state the final conclusion that addresses the original claim. Determine the test statistic. Determine the P-value"
Answers
The null hypothesis states that the mean change in LDL cholesterol with garlic treatment is not greater than 0, while the alternative hypothesis suggests that it is greater than 0.
The given information presents a study on the effectiveness of garlic for lowering cholesterol. The sample consisted of 49 subjects who were treated with raw garlic, and their LDL cholesterol levels were measured before and after the treatment. The mean change in LDL cholesterol was found to be 0.1, with a standard deviation of 15.4.
To determine whether the garlic treatment has a significant effect on lowering LDL cholesterol, a hypothesis test is conducted using a significance level of 0.10. The null hypothesis (H0) states that the mean change in LDL cholesterol is not greater than 0, implying that the garlic treatment has no effect. The alternative hypothesis (H1) suggests that the mean change is greater than 0, indicating that the garlic treatment is effective.
To perform the hypothesis test, a t-test is used since we have a sample mean and standard deviation. The test statistic is calculated by dividing the mean change (0.1) by the standard deviation (15.4) and multiplying it by the square root of the sample size (49). The resulting test statistic is then compared to the critical value at a significance level of 0.10.
The calculated test statistic is compared to the critical value in the t-distribution table, or it can be obtained using statistical software. The p-value is determined based on the test statistic and the degrees of freedom (n-1), where n is the sample size.
If the p-value is less than the significance level of 0.10, the null hypothesis is rejected, suggesting that the garlic treatment has a significant effect on lowering LDL cholesterol. On the other hand, if the p-value is greater than or equal to 0.10, we fail to reject the null hypothesis, indicating that there is not enough evidence to support the claim of the garlic treatment's effectiveness.
Hypothesis testing allows researchers to make conclusions based on sample data and evaluate the effectiveness of treatments or interventions. In this case, the results of the hypothesis test will provide insights into whether the garlic treatment has a meaningful impact on reducing LDL cholesterol levels. It is important to consider that the effectiveness of garlic for lowering cholesterol may vary among individuals, and further research and studies may be needed to obtain more comprehensive and generalizable results.
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Blood is currently in a subclavian artery. What vessel must blood pass through to enter the ulnar artery
Answers
That blood must pass through the brachial artery to enter the ulnar artery. The brachial artery is the main artery in the upper arm and it branches off into the ulnar and radial arteries.
To explain further, the subclavian artery is located in the neck and it branches off into the axillary artery which then becomes the brachial artery. So, blood would flow from the subclavian artery to the axillary artery, then to the brachial artery, and finally into the ulnar artery to reach the hand and fingers. To get from the subclavian artery to the ulnar artery, blood must pass through the axillary artery and then the brachial artery.
Blood flows from the subclavian artery to the axillary artery, followed by the brachial artery, before reaching the ulnar artery.
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