Answer:
Explanation:
" Water travels from a tree's roots to its canopy by way of this conductive tissue. In hardwoods, water moves throughout the tree in xylem cells called vessels, which are lined up end-to-end and have large openings in their ends. In contrast, the xylem of conifers consists of enclosed cells called tracheids."
Select the correct answer.
Sonar stands for “sound navigation and ranging.” What assumption was proved wrong after the invention of sonar?
A.
The age of the ocean floor is variable.
B.
The ocean floor is featureless.
C.
The ocean floor is changing.
D.
The ocean floor is denser than continental crust.
Answer:
b
Explanation:
Compare and contrast a human skin cell to a plant leaf cell. How
are they similar and how are they different?
Answer:
Both human skin cell and plant leaf cell have cytoplasm, cell membrane and a nucleus but a plant leaf cell have a cell wall and chloroplasts while a human skin cell does not have a cell wall or chloroplasts.
Explanation:
An animal cell and a plant cell have similar cell parts but a plant cell has an extra cell wall. Leaf cells also have chloroplasts to make food unlike other plant cells like root cells.
In the brown alga Laminaria, the large, leafy-looking thallus
A) grows from a zygote.
B) is a sporophyte.
C) has sporangia.
D) is diploid.
E) ALL OF THE ABOVE
E) all of the above.
In brown algae laminaria, the lrge leafy looking thallus is all of the above as it grows on zygote which is formed by the fusion of gametophye of male and female, it has sporophyte and a sporangia which is diploid.
Laminaria's sporophyte is a complex, leathery, parenchymatous thallus and there is division of laminaria into a blade, a stipe and a holdfast.
It is a temperate brown alga belonging to the group known as kelps. The location of this brown algae is dense underwater forests near the shore in temperate regions.
This brown algae are exclusively multicellular and found in marine habitats.
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Crop rotation is a planned order of specific crops planted on the same field. Crop rotation means that succeeding crops are of adifferent genus and species. Examples are row crops planted after small grains or grain crops after legumes. The planned rotationmay be for a two- or three-year period.What is a LIKELY ecological impact of crop rotation?A) The main crop becomes resistant to pests.B) It can interrupt the life cycles of certain pests.C) Lesser amounts of nitrogen are needed in the soilD) It ensures the presence of a single type of nutrient in the soilPlease select the correct answer choice.
A likely ecological impact of crop rotation is that it ensures the presence of a single type of nutrient in the soil. (option D)
Gluconeogenesis is the process in which A) glucose is converted into carbon dioxide and water B) glucose is formed from noncarbohydrate precursors C) glycogen is formed D) glycogen is broken down to release glucose
Gluconeogenesis is the process in which B) glucose is formed from noncarbohydrate precursors. This process occurs in the liver and helps maintain blood glucose levels when carbohydrate intake is low or during periods of fasting.
The correct answer is B) glucose is formed from noncarbohydrate precursors. Gluconeogenesis is the metabolic process by which glucose is synthesized from non-carbohydrate sources such as amino acids, lactate, and glycerol. This process occurs mainly in the liver and kidneys when the body needs glucose for energy but there is not enough available from dietary sources or stored glycogen. It is important in maintaining blood glucose levels during fasting or prolonged exercise.
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HELP PLEASE !!
In some areas of the world, less water means some people must drink and
bathe in contaminated water. What can be the result of this?
not getting clean
no effect
illness and disease
thirst is not quenched
Which statement is supported by the student's observations?
O The cell wall becomes permeable in an aqueous environment.
O The cell wall allows only water to be transported in and out of cells.
O The cell membrane restricts the movement of substances into the cell.
O The cell membrane allows the selective transport of substances in and out of cells
Answer: The cell membrane allows the selective transport of substances in and out of cells
Explanation:
water can follow two pathways in plants, extracellular and intracellular routes. how do these pathways differ?
a. The extracellular route is for water; the intracellular route is for nutrients.b.Except for the endodermal cell membrane, the extracellular route is entirely external to cell membranes; the intracellular route is inside of cells.
d. Water travels intracellularly; nutrients travel extracellularly. d. In phloem, the extracellular route is used, whereas in xylem, the intracellular route is used. sFRP, Dkk, WIF, Wise/SOST, Cerberus, IGFBP, Shisa, Waif1, APCDD1, and Tiki1 are small protein families that contain Wnt inhibitors. They all work to suppress Wnt signalling by attempting to stop ligand-receptor interactions or Wnt receptor maturation. Stem cell pluripotency, self-renewal, and differentiation are associated with the Wnt catenin signalling pathway. The splanchnic mesoderm and the occipital endodermal both contain Wnt inhibitors and BMPs, which together produce the cardiogenic mesoderm.
water can follow two pathways in plants, extracellular and intracellular routes. how do these pathways differ?
a. The extracellular route is for water; the intracellular route is for nutrients.
b.Except for the endodermal cell membrane, the extracellular route is entirely external to cell membranes; the intracellular route is inside of cells.
c. The extracellular route is for nutrients; the intracellular route isfor water.
d. The extracellular route is used in phloem; the intracellular route is used in xylem.
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Which are characteristics of late adulthood? Check all that apply.
Answer:
During late adulthood the skin continues to lose elasticity, reaction time slows further,
muscle strength and mobility diminishes ,hearing and vision decline and the immune system weakens.
Hope this helps
Explanation:
diana is sick in hospital with a severe bacterial infection. she is to be fed antibiotics intravenously at a constant infusion rate, and the doctor knows that the anti-biotic will be eliminated from the bloodstream at a rate proportional to the amount y(t) present in the bloodstream at time t. if the half-life of the anti-biotic in the bloodstream is 2 hours, what rate of infusion should he prescribe to maintain a long-term amount of 400 mgs in diana’s bloodstream?
The doctor should prescribe an infusion rate that compensates for the elimination of the antibiotic. This rate should be equal to 1/2 * y(t), where y(t) is the amount present in the bloodstream at time t.
To maintain a long-term amount of 400 mgs of the antibiotic in Diana's bloodstream, the doctor needs to prescribe a rate of infusion that compensates for the elimination of the antibiotic.
Since the half-life of the antibiotic in the bloodstream is 2 hours, we can use this information to calculate the infusion rate.
The half-life of a substance is the time it takes for half of the initial amount to be eliminated. In this case, if the initial amount is 400 mgs, after 2 hours, half of it will be eliminated, leaving 200 mgs.
To maintain a constant amount of 400 mgs in the bloodstream, the infusion rate should match the elimination rate.
Since the elimination rate is proportional to the amount present in the bloodstream, we can say that the elimination rate is equal to k times the amount present, where k is a proportionality constant.
Using this information, we can set up a differential equation:
d(y)/dt = -k * y(t).
Here, y(t) represents the amount of antibiotic in the bloodstream at time t.
To find the value of k, we can use the fact that the half-life is 2 hours. Since the half-life represents the time it takes for half of the amount to be eliminated, we have:
y(t) = y(0) *\((1/2)^{(t/2)}\), where y(0) is the initial amount.
At t = 2 hours,
y(2) = y(0) *
(1/2)²⁾² = y(0) *
(1/2) = 200 mgs.
Now, let's substitute this into the differential equation:
-k * 200 = -k * y(0).
Since we know that
y(0) = 400 mgs,
we can solve for k:
k = 200/400
= 1/2.
Therefore, the rate of infusion that the doctor should prescribe is such that the antibiotic is eliminated from the bloodstream at a rate of 1/2 * y(t), where y(t) represents the amount present in the bloodstream at time t. This will maintain a long-term amount of 400 mgs in Diana's bloodstream.
In conclusion, the doctor should prescribe an infusion rate that compensates for the elimination of the antibiotic. This rate should be equal to 1/2 * y(t), where y(t) is the amount present in the bloodstream at time t. By setting the infusion rate to this value, the doctor can maintain a long-term amount of 400 mgs in Diana's bloodstream.
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Which of the following is NOT a psychological factor affecting pain?interpretationanxietyattentionendorphins
Interpretation, anxiety, and attention are psychological factors affecting pain. Psychological factors that are present when we sense pain can completely change the intensity of pain.
Endorphins serves as analgesic or sedative that curtail pain that are produced in the brain, spinal cord and other parts of he body that are discharged as a feedback to the neurotransmitters of the brain.
Answer - Option 4 - endorphins
______is often used to improve soils as it is
really good at absorbing and holding water.
Answer:
Peat mossExplanation:
According to CK12 - Foundation, Peat moss is commonly used by gardeners to improve soils, since it is really good at absorbing and holding water (Figure below). Depending on the location, ferns have several different uses worldwide. Ferns are found in many gardens as ornaments, and are used as indoor plants.
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Explain why transcription occurs in the nucleus of eukaryotes.
Bonus: Compare the processes of replication and transcription.
Answer:
Transcription occurs in eukaryotes in a way similar to prokaryotes. However, initiation is more complex, termination does not involve stem-loop structures and transcription is carried out by three enzymes (RNA polymerases I, II and III) each of which transcribes a specific set of genes and functions in a slightly different way.
Explanation:
Answer:
The transcription is the process by which the DNA molecule makes an RNA molecule using the enzyme RNA polymerase and other proteins.
Step-by-step answer:
The mRNA is then used to generate proteins by a process that is called translation which would occur in the cytoplasm. The transcription occurs in the nucleus because the DNA cannot leave the nucleus. which is the center in which the DNA is stored.
You are a genetic counselor and a couple has come to you for advice. They have a family history of cancer and are concerned that their unborn third child will also get cancer. They provide you with the following pedigrees for two different traits relating to defects in the enzymes separase and topoisomerase:
ASeparase 4 B.Topoisomerase 4 defect defect 10 10 12 13 1112 13 15 14 15
These two pedigrees represent the same family. Genetic testing shows that individual 4 has only nonmutant alleles of both genes and individual 12 has only mutant alleles of both genes. Individuals 6, 8, 9, 12, and 14 have cancer. The couple just recently learned that their daughter (individual 14) has cancer and has both mutations. In this lab activity, you will use Punnett squares to determine the probability that the couple’s third unborn child will also inherit both mutations and be at risk for developing cancer.
.Using Punnett squares, determine the phenotypes of offspring that the following parents could produce. For some situations, there could be more than one genotype for at least one of the parents. In these cases, be sure to include Punnett squares for all possibilities, and give the probablilty that their third unborn child may be at risk for developing cancer.
Complete the following:
1.An autosomal recessive trait with an unaffected mother and an affected father.
2. An autosomal dominant trait with an affected mother and an unaffected father.
3. An X-linked recessive trait with an unaffected mother and an affected father.
4. An X-linked dominant trait with an unaffected mother and an affected father.
Autosomal recessive trait with an unaffected mother and an affected father: Assuming the affected father is homozygous recessive (aa) and the unaffected mother is heterozygous (Aa), the Punnett square would look like this:
css
| a a
--|------
A | Aa Aa
a | aa aa
All offspring would be carriers (Aa), but none would be affected (aa). The probability of their third unborn child inheriting two copies of the recessive allele (aa) and being affected is 25%.
Autosomal dominant trait with an affected mother and an unaffected father:
Assuming the affected mother is heterozygous (Aa) and the unaffected father is homozygous recessive (aa), the Punnett square would look like this:
css
| A a
--|------
a | aa aa
A | Aa A
Half of the offspring would be affected (Aa), and half would be unaffected (aa). The probability of their third unborn child inheriting the dominant allele from the affected mother and being affected is 50%.
X-linked recessive trait with an unaffected mother and an affected father:
Assuming the affected father is hemizygous (XaY) and the unaffected mother is homozygous dominant (XX), the Punnett square would look like this:
diff
| X X
--|------
Y | XY XY
Y | XaY XaY
All female offspring would be carriers (XaX), but none would be affected (XaXa). Male offspring would have a 50% chance of being affected (XaY) and a 50% chance of being unaffected (XY). The probability of their third unborn child being a male and inheriting the X-linked recessive allele from the affected father and being affected is 50%.
X-linked dominant trait with an unaffected mother and an affected father:
Assuming the affected father is hemizygous (XaY) and the unaffected mother is homozygous dominant (XX), the Punnett square would look like this:
diff
| X X
--|------
Y | XaY XaY
Y | XaX XaY
All female offspring would be affected (XaX), but none would be carriers (XaXa). Male offspring would have a 50% chance of being affected (XaY) and a 50% chance of being unaffected (XY). The probability of their third unborn child being a female and inheriting the X-linked dominant allele from the affected father and being affected is 50%.
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A transfer cell has knobby growths extending into the cell that facilitate movement of minerals from its.
Answer:
A transfer cell has knobby growths extending into the cell that facilitate movement of minerals from its
a. cytoplasm into its vacuole.
b. cytoplasm into its cell wall...
✓ B A transfer cell has knobby growths extending into the cell that facilitate movement of minerals from its [cytoplasm into its cell wall.]
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Explanation:
A substance with a pH of 6 is called O a base. O neither an acid nor a base. O an acid. O both an acid and a base.
Describe 3 ways new strains of bacteria may develop.
Answer:
1) Mutations: Bacterial mutations can occur spontaneously and alter the DNA of the bacterium, leading to changes in its characteristics and potentially leading to the development of a new strain.
2) Horizontal gene transfer: Bacteria can exchange genetic material with other bacteria through mechanisms such as conjugation, transduction, or transformation. This can result in the transfer of virulence factors, antibiotic resistance genes, or other traits that contribute to the development of new strains.
3) Antibiotic resistance: The overuse and misuse of antibiotics can lead to the selection and spread of antibiotic-resistant strains of bacteria. This can result in the emergence of new strains that are resistant to multiple antibiotics and pose a significant public health threat.
Which of these is one of the main reasons why viruses are not classified as living organisms?
Viruses are not considered living organisms because they need a living being to use as a host.
What is a virus?A virus is a simple microorganism that is an infectious agent which infects cells and can cause disease. The virus is made up of a segment of DNA or RNA surrounded by a shell of protein material. Since it has no more organelles for replication, the virus needs a host in order to replicate. Then what it does is infect the cells and use their components and organelles to be able to replicate.
The virus, by appropriating the cell, can generate the death of this cell, causing damage to the organism in which these cells are, since when it replicates it will infect more cells to use them as a host and generating more and more cell lysis.
Therefore, we can confirm that viruses are not considered living organisms because they need a living being to use as a host.
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Which statement best explains how enzymes speed up chemical reactions?
Responses
Enzymes gain heat from chemical reactions
Enzymes use light energy to speed up chemical reactions.
Enzymes lower the activation energy of a reaction.
Enzymes change shape during chemical reactions.
The correct option is 2
enzymes speed up chemical reaction is Enzymes use light energy to speed up chemical reactions.
What is the enzyme in a chemical equation?
An enzyme acts as a catalyst by providing an alternate pathway for the reaction that may have a lower the activation energy.
An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself.
Enzymes create chemical reactions in the body. They actually speed up the rate of a chemical reaction to help support life. The enzymes in your body help to perform very important tasks. These include building muscle, destroying toxins, and breaking down food particles during digestion.
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it is the Enzymes lower the activation energy of a reaction
why bro gave wrong answer and dummies saying its true
The word "coccus" is used to
describe a sphere shaped bacteria.
Which of the following is coccus-
shaped?
(Hint: Look for the root word
"coccus".)
A. Leptospira interrogans
B. Streptococcus pyogenes
C. Bacillus cereus
D. Spirillum winogradskyi
Answer:
the answer is B. Streptococcus pyogenes
Explanation:
How do you get the macromolecules in your body?
Answer:
explanation
Explanation:
Food provides the body with the nutrients it needs to survive. Many of these critical nutrients are biological macromolecules, or large molecules, necessary for life. These macromolecules (polymers) are built from different combinations of smaller organic molecules (monomers).
what are two or more genes producing a single trait
energy loss happen when a filament bulb glow. Write a situation where this energy is used properly. 20 pts
Answer:
When turning electrical energy into light energy.
Explanation:
When the filament heats up and becomes red-hot as a result of opposing and resisting electricity, it begins to glow and therefore turns electrical energy into light energy.
the drug which is used to reduce pain is ..,....
i) opium ii) bhang iii) hashish iv) marijauna
Answer:
hashish
Explanation:
opinum
Explanation:
because it is used to make pain nubbing/pain killer
Is this the right order of water cycle?
Precipitation, interception, runoff, collection, infiltration, percolation, discharge, evaporation, transpiration, evapotranspiration, condensation
ALSO IS EVAPORATION AND TRANSPIRATION SAME THING AS EVAPOTRANSPIRATION
Answer:
water cycle, also called hydrologic cycle, cycle that involves the continuous circulation of water in the Earth-atmosphere system. Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff. Although the total amount of water within the cycle remains essentially constant, its distribution among the various processes is continually changing.
in his investigation of sex differences, erikson observed that, in their play, girls emphasize ________ space, whereas boys emphasize ________ space.
In his investigation of sex differences, Erikson observed that girls emphasize "proximal" space, whereas boys emphasize "distal" space.
Proximal space refers to the space that is close to the body, while distal space refers to the space that is farther away from the body. Erikson noted that in their play, girls tend to focus on activities that involve close physical contact and interaction with others, such as playing with dolls or engaging in role-playing games.
On the other hand, boys tend to engage in activities that involve more physical movement and exploration of the environment, such as playing with balls or engaging in rough-and-tumble play.
Erikson's observations about sex differences in spatial behavior are consistent with research in developmental psychology, which has shown that boys and girls tend to develop different preferences and skills related to spatial cognition. For example, boys tend to outperform girls on tasks that require mental rotation or spatial visualization, while girls tend to outperform boys on tasks that require spatial memory or object location. These sex differences are thought to arise from a combination of biological, cultural, and environmental factors, and may have implications for educational and occupational outcomes.
Understanding these differences may help educators and parents to better support children's development and promote equality in opportunities and outcomes.
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Which of the following is a way humans use Which of the following is a way humans use trees? a. paper b. food c. wood d. all of the above
Please select the best answer from the choices provided A B C D
a. paper
b. food
c. wood
d. all of the above
Answer:
The amswer is D. All of the above,
12. In the space below, list the characteristics which are referred to as "certain similarities” that
the basis for classifying organisms in the same basic group.
Which of the following is an appropriate hypothesis to answer the question, why are leaves green?
A: To study the coloring of leaves, scientists grew 250 maple trees within a greenhouse over the course of six months and analyzed the structure of over 1,000 leaves.
B: Leaves are green due to the presence of chlorophyll, a pigmented compound found within the leaves.
C: Based upon the given data, which spans 25 years of research, scientists determined that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
D: Using the work of previous scientists and adding new data to their information, scientists have found that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
PLEASE HELP FAST !!!!!!!!!!!!!!!!!
Answer:D
Explanation:
Answer:
D. Using the work of previous scientists and adding new data to their information, scientists have found that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
Explanation:
Problem:your bedroom conditioner blows. very cold air at night but only cool air during the day?observation:your bedroom gets its of direct sunlight all day long? what's the hypothesis&experiment.
Based on the experiment, if the temperatures are significantly different between the conditions with and without direct sunlight, it can be concluded that the direct sunlight affects the air conditioner's performance, causing it to blow cooler air during the day. On the other hand, if the temperatures are similar, it would indicate that direct sunlight is not the main reason for the difference in air temperature blown by the air conditioner at night and during the day.
Hypothesis: The hypothesis would be that the direct sunlight is affecting the temperature of the air conditioner, causing it to blow cooler air during the day compared to at night.
Experiment: To test this hypothesis, you can conduct the following experiment:
1. Set up a thermometer in your bedroom to measure the temperature.
2. Record the temperature in the room during the day and at night for several days.
3. Place a shade or curtain on the window to block direct sunlight during the day.
4. Repeat step 2, measuring the temperature during the day and at night with the shade or curtain blocking direct sunlight.
5. Analyze the data and compare the temperatures recorded during the day and at night with and without direct sunlight.
Main Part: The hypothesis is that the direct sunlight is affecting the temperature of the air conditioner, causing it to blow cooler air during the day compared to at night. To test this hypothesis, an experiment can be conducted by measuring the temperature in the room during the day and at night for several days. Then, a shade or curtain can be placed on the window to block direct sunlight during the day, and the temperature can be measured again during the day and at night.
By comparing the temperatures recorded with and without direct sunlight, the impact of sunlight on the air conditioner's performance can be determined.
Explanation: The hypothesis suggests that the direct sunlight may be influencing the temperature of the air conditioner, leading to a difference in the air it blows at night and during the day. To investigate this, an experiment is designed to measure the temperature in the room during the day and at night, both with and without direct sunlight. By comparing the recorded temperatures, it will be possible to determine if direct sunlight has an effect on the air conditioner's performance. If the temperatures are significantly different between the two conditions, it would support the hypothesis that direct sunlight is causing the air conditioner to blow cooler air during the day.
Conversely, if the temperatures are similar, it would suggest that direct sunlight is not the primary factor affecting the air conditioner's performance.
Conclusion: Based on the experiment, if the temperatures are significantly different between the conditions with and without direct sunlight, it can be concluded that the direct sunlight affects the air conditioner's performance, causing it to blow cooler air during the day. On the other hand, if the temperatures are similar, it would indicate that direct sunlight is not the main reason for the difference in air temperature blown by the air conditioner at night and during the day.
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