The waxy protective covering of a leaf is cuticle
What is cuticle in plants ?
The exterior surfaces of the major organs of all vascular land plants have a covering of lipid polymers impregnated with waxes called the plant cuticle. Additionally, it can be found in mosses' sporophyte and gametophyte generations as well as in the sporophyte generation of hornworts. By treating plant tissue with enzymes like pectinase and cellulase, the cuticle of the plant can be isolated intact and forms a cohesive outer covering of the plant.
The waxy protective covering of a leaf is cuticle
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Taxol is an anticancer drug extracted from the pacific yew tree that binds to microtubules and prevents their depolymerization. Which phase of mitosis or cell division would be inhibited by treatment with taxol?.
Answer:
I DON'T KNOW if my answer is correct but here is the answer
Explanation:
Taxol blocked cell cycle progress at the metaphase/anaphase transition and inhibited cell proliferation.
a concentration gradient of chloride ions (cl-) exists across a cell membrane with a higher concentration of cl- outside the cell. in response to this concentration gradient, water moves out of the cell to equalize the gradient. what term best describes this process:
Water moves out of the cellular to equalize the gradient. what term pleasant describes this system: both the concentration gradient and electric gradient prefer the movement of Cl- ions into the mobile.
The attention of the answer tells you the way a lot of solutes have been dissolved within the solvent. as an example, if you add one teaspoon to two cups of water, the concentration could be said as 1 t salt per 2 c water.In chemistry, concentration refers to the amount of a substance in a defined space. any other definition is that attention is the ratio of solute in an option to both solvent or overall solution. concentration is typically expressed in terms of mass in step with unit extent.
Excessive attention way the density of the material is extra than what surrounds it. that is in evaluation to a lower concentration wherein the density of material could be much less. that is helpful in explaining the natural movement of materials because they clearly flow from high concentration to decrease.
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in the meselson-stahl experiment, after the first round of dna replication, the model was eliminated because band(s) was/were seen in the tube after density gradient centrifugation.
The heavy 15N model was eliminated because light 14N band(s) was/were seen in the tube after density gradient centrifugation in the meselson-stahl experiment.
The best model for DNA replication was determined by an experiment designed by Matthew Meselson and Franklin Stahl in 1958. For several generations, they raised E. coli in a medium that contained a heavy nitrogen isotope (15N), which was incorporated into nitrogenous bases and eventually into the DNA. The parental DNA was marked by this. After that, the E. coli culture was moved into a medium containing 14N and left to develop for one generation. DNA was isolated when the cells were harvested.
Through the process of ultracentrifugation, the DNA was divided into bands based on the density of the DNA. It would be expected that DNA produced in 15N will form a band at a place with a higher density than DNA grown in 14N. Meselson and Stahl discovered that the solitary band seen after one generation of growth in 14N was positioned halfway between the DNA of cells grown exclusively in 15N or 14N. This indicated either a dispersive or a semiconservative form of reproduction.
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PLEASE HELP DUE SOON
What is the lowest possible elevation of the lake?
Answer: The lowest depth shown on this map of Lake Ontario is 700 feet. The closest marker to this depth is the letter E.
Explanation: This topographical map of Lake Ontario displays each numerical depth in feet.
What two scientists are responsible for saying plants and animals are made of cells leading to the development of the Cell Theory?
Group of answer choices
Schleiden
Hooke
Zaccharius Janssen
Leeuwenhoek
Schwann
Hans Janssen
Answer:
The answer is Theodore Schwann and Mattias Schleiden
Explanation:
They studied cells of plants and animals respectively. These scientists identified key differences between the two cell types and put forth the idea that cell were fundamental units of both plants and animal .
i need help i have to submit in 20 minutes!!!
Answer:
Cell 1
Explanation:
The Golgi Complex is responsible for sorting and packaging proteins and lipids.
Answer:
A. Cell 1
Explanation:
The Golgi apparatus is located at the base of the cell and serves as a place where proteins are added to lipids, which are then transported to other parts of the cell. It also contains enzymes that break down proteins, carbohydrates and lipids. The Golgi apparatus can be found in most eukaryotic cells.
What type of lipid polymer make up a hormone
Answer: Cholesterol i believe
Explanation:
Imagine you are in a laboratory. You are exploring the following reaction: A + B → C
When product C is created, bubbles form. When 10mL of A is added to 10mL of B, the reaction takes twenty seconds. Your teacher gives you three unknown substances (X, Y, and Z), one of which is a catalyst for the reaction.
Design an experiment to test substances X, Y, and Z to determine which one is a catalyst for the reaction.
When A and B are reacted and the time taken is measured, the substance marked X, Y, and Z are added and the one that causes the reaction to occur fastest is the catalyst.
What is the experiment?In order to understand what we mean by an experiment, we have to find out that know that it is through an experiment that we can be able to know the relationship between a given cause and an effect. It is thus apt to say that by the use of an experiment, we can be able to determine a cause and effect relationship.
Having said this, we are asked to Design an experiment to test substances X, Y, and Z to determine which one is a catalyst for the reaction. We now need to use the same amounts of A and B and add in each case, only a little drop of the substances X Y and Z. The substance that causes the reaction to occur in the least time is the catalyst.
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Yvonne lives in an inner-city neighborhood that has installed urban gardens for residents. At the end of the day, Yvonne looks out of her apartment
window onto the vines that are slowly creeping up their supports. She sighs and feels a sense of calm and connection. Which aspect of Yvonne's health
is being MOST affected by the work she does in the urban garden?
O A. physical
B. emotional
O C. environmental
O D. occupational
Yvonne's Emotional health is being most affected by the work she does in the urban garden.
Emotional health is about how we think and feel. It is about our sense of wellbeing, our ability to cope with life events and how we acknowledge our own emotions as well as those of others. Emotional health allows you to work productively and cope with the stresses of everyday life. It can help you realize your full potential. It helps you work with other people and contribute to society. It also affects your physical health.
Depression, anxiety, stress, poor body image, grief, loss, a major change in your life such as becoming a new parent can all affect your mental and emotional health in day to day living.
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Answer:
emotional
Explanation:
Which product of photosynthesis is released into the atmosphere?
Answer:
Oxygen! Oxygen is the waste product of plants and ends up in the atmosphere, which allows animals to breathe.
explain how competition can affect an organisms niche
Answer:
The competitive exclusion principle says that two species can't coexist if they occupy exactly the same niche (competing for identical resources). Two species whose niches overlap may evolve by natural selection to have more distinct niches, resulting in resource partitioning.
Competition influences an organism's niche by shaping its resource utilization, spatial distribution, and evolutionary adaptations. It drives species to adapt and specialize, facilitating coexistence and maintaining the balance of ecological communities.
Competition plays a significant role in shaping an organism's niche, which refers to the specific role and position it occupies within its environment. Here's how competition can affect an organism's niche:
Resource Competition: Organisms often compete for limited resources such as food, water, shelter, or mates. When resources are scarce, intense competition can occur, forcing organisms to adapt their niche to gain access to these resources. This can lead to specialization, where organisms develop specific traits or behaviors to exploit specific resources and reduce competition.Competitive Exclusion: Intense competition can result in competitive exclusion, where one species outcompetes another for the same resources. This can lead to the displacement or elimination of the less competitive species from that particular niche. As a result, the winning species can expand its niche and occupy a broader range of resources.Niche Partitioning: In order to coexist and reduce competition, similar species may partition their niches by dividing the available resources. Each species may specialize in utilizing different resources or occupy different microhabitats within the same ecosystem. This allows for the coexistence of multiple species with similar requirements.Competitive Interactions: Competition can also drive evolutionary changes in organisms. Over time, species may evolve different traits or behaviors that give them a competitive advantage in accessing resources or avoiding competition. This can lead to the diversification of niches within a community, as species adapt to occupy different ecological roles.Learn more about Competition, here:
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PLEASE HELP HAVE INTIL 12:00 AND I STILL HAVE OTHER CLASSES TO DO PLEASE HELP!!!!!! 2. Explain how your investigation provides evidence for a feedback mechanism that
supports homeostasis. In your answer, identify body systems that likely control
this feedback mechanism. (1 point)
Feedback mechanism helps investigating homeostasis through negative feedback loop.
What is homeostasis and what mechanism is followed to maintain homeostasis?Homeostasis is the phenomena body follows to maintain the constant internal temperature.Homeostasis is the constant internal environment maintained by the human body for better survival.Feedback mechanism is the mechanism to be followed by body to maintain homeostasis.For example if the body temperature drops below the comfort zone feedback recieved is negative .Negative loop sent responded by increasing the temperature and bringing comfort to internal environment .To know more about homeostasis visit:
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what respiration that uses oxygen
Scientists have discovered many methods to manipulate DNA and create phenotypes that do not naturally exist in nature. Which technique would NOT be used by a genetic scientist to produce new genetic variations in a lab?
A. Transforming bacteria with engineered plasmids.
B. Using lasers to cut and paste DNA.
C. Inducing mutations with chemicals or radiation.
D. Inserting genes using viruses as vectors.
Answer:
I'm fairly sure it's D.
Scientists have discovered many methods to manipulate DNA and create phenotypes that do not naturally exist in nature. The technique would not be used by a genetic scientist to produce new genetic variations in a lab is transforming bacteria with engineered plasmids. Thus, option A is correct.
What is the main function of the plasmid in a prokaryotic cell?The main function of the plasmid in a prokaryotic cell is that the plasmids contain genetic material and generally Plasmids are organelles mostly found in prokaryotes such as bacteria. They are also found in some eukaryotes.
Plasmids have the ability to replicate on its own and they are used in replication processes of prokaryotes and help in the survival of the cell.They are small double stranded DNA molecule which is entirely different from the main cell DNA. Both the enzymes DNA polymerase I and DNA polymerase III involved in the process of DNA Replication with specialised functions.
Therefore, Scientists have discovered many methods to manipulate DNA and create phenotypes that do not naturally exist in nature. The technique would not be used by a genetic scientist to produce new genetic variations in a lab is transforming bacteria with engineered plasmids. Thus, option A is correct.
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why has the miracle of synthetic fertilizers in some way become too much of a good thing?
The use of synthetic fertilizers could be seen as too much of a good thing as it could also lead to pollution of some sorts.
What are synthetic fertilizers?The term synthetic fertilizers are those fertilizers that are produced artificially. This is different from the type of fertilizers that are produced from organic materials. Those kind of fertilizers are generally called the organic fertilizers.
Now, when we make use of synthetic fertilizers, there is the likelihood that they could be washed into natural water bodies where they could pollute them and cause an overgrowth of the weeds and the consequent death of the lake.
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What is effect of external temperature on body variables i.e. Temperature, body fluid, ph etc.
A. They tend to increase
B. They tend to decrease
C. Both a and b
D. No effect at all
The effect of external temperature on body variables like temperature, body fluid, ph etc is No effect at all; option D.
What are variables?Variables are measurable factors or quantities which are subject to change.
Variables are important in research and experiments.
In the human body, various measurable variables exist. some of these variables include temperature, body fluid, pH etc.
The body has a mechanism for maintaining a fairly constant internal environment despite challenges i the external environment.
This s known as homeostasis.
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20 points
Examine the graph below. A crystalline substance is added to a beaker filled with water. The crystals dissolve, and a precipitate is formed. The bottom of the beaker is
too hot to touch. The temperature is monitored and the temperature data is shown on the graph below. At which time did the temperature first reach 65C?
The is time when temperature first reach 65C is 40
What is temperature?
A physical measure that describes how hot a substance or radiation is is called temperature.
There are three different types of temperature scales: those, like the SI scale, that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron, in a body; those that only rely on strictly macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are defined by practical empirical properties of particulates rather than by theoretical principles. With a thermometer, temperature is measured. It is calibrated in a number of temperature scales that historically defined themselves using different reference points and thermometric substances.
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what happens to species with higher resilience as compared to species with lower resilience?
Species with higher resilience have higher chances of survival as compared to species with lower resilience.
Resilience rate refers to the ability to rebuild following damage. When damaged, species with a higher degree of resilience quickly recover, increasing their chances of surviving. Any harm to a species caused by an internal element, such as sickness, or an external factor, such as food or climate change, can cause a species with a lower rate of resilience to collapse.
The capacity to respond effectively to adversity, trauma, tragedy, threats, or severe causes of stress is known as resilience. The idea of resilience has been used to describe a variety of systems, from cells to entire organisms.
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If the conservative model had been correct, how many generations of bacterial cell division would have had to pass before meselson and stahl would have observed evidence of a band in the cscl gradient corresponding to a hybrid dna molecule containing both 14n and 15n?.
If the conservative model had been correct, No generations; a hybrid would never form had to pass before meselson and stahl would have observed evidence of a band in the cscl gradient corresponding to a hybrid dna molecule containing both 14n and 15n.
What is the Meselson and Stahl experiment about?
In 1958, Matthew Meselson and Franklin Stahl using three models of conservative, semi conservative and dispersive of how organisms might replicate their DNA for their experiment were able to show that each strand in a DNA molecule serves as a template for synthesis of a new, complementary strand.
Here's the complete question:
If the conservative model had been correct, how many generations of bacterial cell division would have had to pass before Meselson and Stahl would have observed evidence of a band in the CsCl gradient corresponding to a hybrid DNA molecule containing both 14N and 15N?
A) 1 generation
B) 4 generations
C) More than 10 generations
D) No generations; a hybrid would never form.
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The structure in the brain that, when damaged, causes rats to eat and eat and eat is called the __________.
Answer:
Ventromedial hypothalamus
Explanation: When the ventromedial hypothalamus is damaged, an individual cannot feel sated after eating. This lack of satiety causes excessive hunger, and overeating. Hope this helped :)
The Karner blue butterfly has been listed as an endangered species since 1992. Karner blue butterfly larvae feed only on wild lupine plants, which
require a habitat with dry soil and exposure to direct sunlight.
Which of the following would be the best habitat for wild lupine that could help Karner blue butterfly populations recover?
A a mountain top that is covered in snow
Ba river bank that was flooded by high water
an open area in a forest that was cleared by a fire
Dan isolated area in a jungle that has many large trees
50.0
Answer:
c. an open area that was cleared by a fire
Do you think it is possible to capture energy from photosynthesis for human use?
Answer:
no i do not
Explanation:
my reasoning is plants function differently then the human body our bodys need food sunlight wouldnt be enough form of energy to fully function
What type of force does the water exert on the planes floats, which cause the motion of plane to slow?
Which of the following monomers is correctly paired with the macromolecule it
forms?
ONucleotide Nucleic Acids
O Monosaccharide - Protein
O Fatty Acid-Carbohydrate
O Amino Acids - Lipids
Answer:
no. 2 is a right answer.
Explanation:
Monosaccharide- Protein.
a new restriction endonuclease is isolated from a bacterium. this enzyme cuts dna into fragments that average 4,096 base pairs long. like many other known restriction enzymes, the new one recognizes a sequence in dna that has twofold rotational symmetry. from the information given, how many base pairs of dna constitute the recognition sequence for the new enzyme?
For the identification of cleavage or cutting capacity of the particular newly isolated restriction endonuclease enzyme, we can provide the entire known nucleotide sequence during restriction activity, after that we can do sequencing for the analysis of at which specific position DNA is cutting down by that particular restriction enzyme.
Sequencing is the method used to know the genomics size of long as well as short stretch of DNA results in a shorter time period. There are two types of sequencing, first is ancient sequencing techniques such as Sanger sequencing and second one is next generation sequencing. Nowadays the next generation sequencing method is widely used for sequencing. These next generation sequencing is totally based on computer based technique.
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In pea plants sead color green is dominant to yellow and seed shape round is dominant to wrinkled. In di hybrid cross produces 800 seads in F2 generation.
Out of 800 seeds how many will be Green and Round
a.450
b.150
c.50
d.400
In the illustrated dihybrid cross, out of 800 seeds, 450 would come out green and round.
Dihybrid crossAssuming the seed color allele is represented by A and the seed shape allele is represented by B.
At F1: AABB x aabb
AaBb
At F2: AaBb x AaBb
Genotype ratio of Offspring:
A_B_: green and round = 9
aaB_: yellow and round = 3
A_bb: green and wrinkled = 3
aabb : yellow and wrinkled = 1
Thus, the chance of producing green and round seeds from the F2 cross is 9/16.
With 800 seeds produced:
800 x 9/16 = 450
In other words, out of 800 seeds, 450 of them would be green and round.
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in eukaryotes, where do transcription regulators bind? group of answer choices downstream of a gene. upstream or downstream of a gene. at the promoter region, near the tata box. upstream of a gene.
In eukaryotes, transcription regulators bind at the promoter region, near the TATA box.
In eukaryotes, the promoter region is present upstream near the TATA box. The promoter region is the site recognized by the RNA polymerase and where it binds so that transcription can occur.
The transcription factors also bind to the promoter region, so transcription initiation occurs. These transcription regulators are referred to as transcription factors. Transcription can be described as a process in which information from the DNA is coded into mRNA.
Mostly, the promoter sequence is placed near to the gene that is to be transcribed.
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Scientists classify rocks into three different types. What is the main basis for the classification system they chose?
A. color of rock
B. shape of rock
C. how the rock formed
D. who the discovered the rock
Answer:
C. How the rock formed
Explanation:
It was right trust me
describe how leaves undergo photosynthesis underwater use the chemical reaction for photosynthesis to help answer
Answer:
In photosynthesis, multiple molecules of carbon dioxide are combined to produce glucose using energy from sunlight. Terrestrial plants obtain carbon dioxide for this process from the atmosphere, as carbon dioxide gas is abundantly present in the air. However, carbon dioxide can also dissolve in water, and aquatic plants obtain carbon dioxide directly from the water that surrounds them. This allows aquatic plants like seaweed and many others to obtain energy from sunlight.
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Answer:
Answer is D
Prokaryotic cells and Rukaryotic cells both have cell membranes, genetical material, ribosomes, and cytoplasm
Answer:
D) passed the test
Explanation: