Answers
Related Questions
The Meselson-Stahl experiment demonstrated that DNA replication is semiconservative. In the figure, semiconservative replication is illustrated byA) AB) BC) A mix of these methods, depending on the cell typeD) C
Answers
DNA replication is called semiconservative because, in each copy that is made of the DNA, one of the strands comes from the template. This means that all copies of DNA retain one strand of the original DNA (semiconservative). Therefore, the image that best illustrates DNA replication is A.
Why does the student put the maggots on gauze
Answers
Answer:
bcs he is a bitwrong in the head
Explanation:
PLEASE HELP ME
What roles do photosynthesis and respiration play in
the distribution of gases in seawater?
Answers
2.) Seawater has many different gases dissolved in it, especially nitrogen, oxygen and carbon dioxide. It exchanges these gases with the atmosphere to keep a balance between the ocean and the atmosphere. This exchange is helped by the mixing of the surface by wind and waves. :)))
which trait does the fly agaric and the palm have in common
Answers
8. Plant cells have some parts that animal cells do not have. Plant cells have __________, __________, __________.
9. Most of the organelles in plant and animal cells are inside the __________
10. _________ cells have a “box” shape,
11. __________ cells are more round
12. The ____________ in plant cells provide an additional layer outside the cell membrane for support the plant.
13. The cell wall separates the inside of the _________ cell from the environment.
14. __________ in plant cells are responsible for performing the process of photosynthesis. If they stop working, photosynthesis will not be taking place in the plant.
15. Plant cells have a ________________ that stores water, nutrients, food and waste products.
16. The________________ are the organelles that makes proteins.
17. Cells move water and materials through the _____________.
Answers
Answer:
8. Plant cells have some parts that animal cells do not have. Plant cells have ___cell wall_______, __chloroplast________, ___large vacuole_______.
9. Most of the organelles in plant and animal cells are inside the __cytoplasm________
10. __Plant_______ cells have a “box” shape,
11. ___animal_______ cells are more round
12. The ___cell wall_________ in plant cells provide an additional layer outside the cell membrane for support the plant.
13. The cell wall separates the inside of the __plant_______ cell from the environment.
14. __chloroplast________ in plant cells are responsible for performing the process of photosynthesis. If they stop working, photosynthesis will not be taking place in the plant.
15. Plant cells have a ____vacuole____________ that stores water, nutrients, food and waste products.
16. The_ ___ribosomes____________ are the organelles that makes proteins.
17. Cells move water and materials through the __process of Diffusion___________.
By exploiting the above symmetry, or otherwise, calculate the electric potential at a point on the axis of the annulus a distance from its center.Hint How to exploit the angular symmetry of the problem
Answers
The electric potential at a point on the axis of the annulus a distance z from its center is given by: \(V = kQ / (2z) * sqrt(r^2 + z^2) / (2π)\)
What is angular symmetry?To exploit the angular symmetry of the problem, we can consider a circular ring of radius r and thickness dr, with charge density λ. The potential dV at a point P on the axis of the ring, at a distance z from the center of the ring, due to a small element of charge dq on the ring is given by:
\(dV = kdq / sqrt(r^2 + z^2)\)
where k is the Coulomb constant.
We can express the charge density λ in terms of the total charge Q on the ring and the circumference C of the ring as:
λ = Q / C = Q / (2πr)
Substituting this expression into the equation for dV and integrating over the entire ring, we get:
\(V = ∫dV = kQ / (2π) ∫dr / sqrt(r^2 + z^2)\)
To evaluate the integral, we can make the substitution \(u = r^2 + z^2, du = 2rdr,\) to obtain:
\(V = kQ / (4πz) ∫du / sqrt(u) = kQ / (4πz) * 2sqrt(u) = kQ / (2z) * sqrt(r^2 + z^2) / (2π)\)
Therefore, the electric potential at a point on the axis of the annulus a distance z from its center is given by:
\(V = kQ / (2z) * sqrt(r^2 + z^2) / (2π)\)
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Following the Industrial Revolution, there was a dramatic change in the coloring of moths near the town of Manchester, England,
in the 1850s. There were many factories in Manchester that released dark soot and pollution into the air and forests nearby. In
the 1950s, the government put air quality control measures into place. The graph shows the percent of each color variation of
peppered moths over time.
Peppered Moth Population
of Manchester
Light
moth
100%
80%
60%
40%
Dark
moth
Dark moth
Light moth
20%
0%
1850
1950
2000
1900
Year
Which statement best describes why the frequencies of dark and light peppered moths changed?
A. Pollution from the factories resulted in the widespread death of both light-colored and dark-colored moths.
B. Soot from the factories darkened trees, making dark moths harder to see and less vulnerable to predation.
C. Emissions from the factories made the sky dark, so the moths changed color to be better hidden during flight.
D. Greenhouse gases from the factories made the surrounding areas warmer, favoring light moths that reflect heat more easily.
Percent of
Population
Answers
Which type of rock has a coarse texture due to slow cooling magma chambers?
1. extrusive
2.intrusive
3.metamorphic
4.sedimentary
Plz i need this answer fast, thank you!!!
Answers
Answer:
intrusive rocks
Explanation:
Which of the following characteristics do not occur in prokaryotic cells?
A. cellular organization
B. thylakoid membranes within chloroplasts
C. oxygenic photosynthesis
D. anaerobic respiration
E. several circular chromosomes
Answers
explanation: Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.
Protein channels allow
molecules in and out of
the cell without using
energy. Therefore, they
are an example of which
type of transport?
Answers
Answer:
I think that it is an example of a passive transport
Explanation:
What advantage does each of the following evolutionary advances give a plant?
Vascular tissue
Xylem:
Phloem:
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The evolutionary advances of the Vascular tissue, Xylem, and Phloem of a plant.
Vascular tissues:- due to their vascular tissues, stems maintain even tall plants provided with water so they don't dry out in the air. Vascular flora evolved leaves to accumulate sunlight. at the start, leaves have been tiny and needle-like, which helped lessen water loss.
The vascular tissues of plant life, which can be composed of specialized undertaking tissues, xylem, and phloem, form non-stop systems thru the plant frame and offer delivery pathways for water, vitamins, and signaling molecules and guide a plant body against mechanical stresses.
Xylem:- transports and stores water and water-soluble vitamins in vascular plants. Phloem is accountable for transporting sugars, proteins, and different organic molecules in vegetation. Vascular vegetation is capable of growing higher than other plants because of the rigidity of xylem cells, which assist the plant.
The phloem:- transports sucrose and amino acids up and down the plant. that is known as translocation. In trendy, this happens between where these materials are made and where they're used or saved (the sinks.
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easy question but
Comets have long, indefinite life spans.
True
False
just tryna give points to people haha
Answers
Hope this helps:)
our of a Plant Cell: Structures and Functions (BioFlix tutorial)
Part A - Comparing plant cells and animal cells
Plant cells and animal cells share many of the same structures, but each type of cell also has unique structures. In this activity, you will indicate which cell structures are found only in plant cells, only in animal cells, or in both plant and animal cells.
Drag each cell structure to the appropriate bin. If a structure is found in both plant cells and animal cells, drag it to the "both" bin.
Answers
Animal and plant cells posses both similarities and differences in their structures. Based on organelles they are :
PLANT ONLYChloroplastCellulose cell wallCentral vacuoleANIMAL ONLYCentriolesBOTH ANIMAL AND PLANT CELL
MitochondriaEndoplasmic reticulumGolgi apparatusCytoskeletonNucleusPlasma membraneWhat makes it an organelle?An organelle is a specialized component with a particular function that is often found within a cell in cell biology. The suffix -elle, a diminutive, in the word organelle, refers to the concept that these structures are components of cells, much like organs are to the body.
The nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles, and vacuoles are among the organelles found in animal cells. Despite not being protected by a membrane, ribosomes are frequently referred to as organelles in eukaryotic cells.
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What are the parts of a leaf
Answers
Answer:
Explanation:
Each leaf typically has a leaf blade ( lamina ), stipules, a midrib, and a margin. Some leaves have a petiole, which attaches the leaf to the stem; leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves.
\(Each leaf typically has a leaf blade ( lamina ), stipules, a midrib, and a margin. Some leaves have a petiole, which attaches the leaf to the stem; leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves.}}}\)
.
.
.
.
Human Population Growth
Objectives: Create a graph of human population growth and use it to predict future growth and identify factors
that affect population growth,
Year
1650
1750
1850
1925
1956
1966
1970
1976
1980
1991
2000
2004
2012
Number of People (in billions)
.60
.70
1.0
2.0
2.5
3.3
3.6
4.0
4.4
5.5
6.0
6.5
7,5
Instructions for creating your graph:
Place time on the horizontal axis. Values should range from 1650 to 2050.
Place number of people on the vertical access. Values should range from 0 to 15 billion.
Make sure that your graph is a full page in size and you have the correct labels for the X and Y axis
Create a title for your graph.
中的质量
ARARIORAT
PARIRATURE
MA
¶¶¶ M
Analysis (use your graph to answer the following):
1. It took 1649 years for the world population to double, going from .25 billion people to .50 billion people.
How long did it take for the population to double once again?
A third time?
2. How long did it take for the population to double a second time?,
3. Use a different color to extend your graph to the year 2015,
In what year will the population reach 10 billion?
1. Based on your graph, how many years will it take for the population of 2000 to double?
The graph illustrates exponential growth. Based on the properties of this graph, what does this term mean?
Answers
Exponential growth refers to a rapid and continuously increasing rate of population growth over time, resulting in a steep upward curve on the graph.
It took 1649 years for the world population to double, going from 0.25 billion people to 0.50 billion people. To double once again, it would take the same amount of time, approximately 1649 years. A third doubling would also take approximately 1649 years.
The population doubled for the second time in the year 1950. It took around 100 years for the population to double for the second time.
Extending the graph to the year 2015, you would add data points for that year. The specific values would depend on the available population data for that year.
According to the graph, the population is projected to reach 10 billion around the year 2050.
Based on the graph, it appears that the population of 2000 will double in approximately 40 years. However, since the specific year for the population value of 2000 is not provided, the exact number of years cannot be determined.
The graph illustrates exponential growth. This term means that the population is increasing at an accelerating rate over time. As the population grows, the rate of increase becomes more significant, resulting in a steep upward curve on the graph. This indicates a rapid and continuous growth pattern rather than a linear or constant rate of growth.
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Identify and define the anther, stigma, style, filament, pistil, petal, stamen, ovary, sepal, and ovule
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A: Ovule: Ovule is that part of the plant which forms the seed of flowering plant when fertilized.
B: Ovary: The ductless reproductive gland is known as the ovary. It houses a large number of ovules. It is the part of plant where seed formation takes place.
C: Style: The stalk that joins the stigma and the ovary is long and slender, like a tube called style.
D: Stigma: The receptive tip at the top of each carpel in the gynoecium of a flower.
E: Pistil: The female reproductive organ of a flower, the pistil is located inside and is made up of three parts: the stigma, style, and ovary. The term "pistil" refers to all of this.
F: Anther: It is a yellow, sac-like structure. The pollen is placed and stored in the anther.
G: Stamen: Also referred to as an androecium, this is the male reproductive component. It is made up of : filaments and anthers.
H: Filament: It is a thin, threadlike structure that supports the anther.
I: Sepal: The green portion that lies under the petals and shields developing buds is known as a sepal.
J: Petal: Petals are a modified version of leaves that are brightly colored to attract insects for pollination. Petals also protect the flower's reproductive parts.
What are the different components of a flower?
The Vegetative components of flower are: Petals and Sepals.The Reproductive components of flower are:Stamen, Anther, Filament, Pistil, Stigma, Style, Ovary.
How does flowers reproduce?
Flowers are a plant's reproductive organs that participate in sexual reproduction. It contains the female reproductive organ known as a gynoecium and the male reproductive organ known as an androecium. Through pollination, the androecium's pollen grains are delivered to the gynoecium's stigma. The male gametes are transferred from the pollen grain to the female gamete that is already present in the ovary through the pollen tube as it grows and develops. The zygote is created when the male and female gametes combine. The ovules become seeds, and the ovary becomes fruit. When these seeds are spread in the soil, they germinate and produce new plants.
Therefore, A, B, C, D, E, F, G, H, I and J are Ovule, Ovary, Style, Stigma, Pistil, Anther, Stamen, Filament, Sepal and Petal, respectively.
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A baby with blood group AB I born into a family where the mother has blood group type B and the father has type O
Determine whether the husband is the biological father of the baby
Answers
The baby AB received the IB allele from the mother and the IA allele from another person. The husband is not the biological father of the baby.
What are the blood type alleles?
Blood type is coded by a triallelic gene
IA allele is dominant over the i alleleIB is dominant over the i allele IA and IB are codominanti is the recessive alleleThe genotypes and phenotypes are
IAIA and IAi → Type AIBIB and IBi → Type BIAIB → Type ABii → Type 0
In the exposed example,
Baby → AB → IAIBMother → B → IBIB or IBiHusband → 0 → ii
The baby carries one IA allele and one IB allele.
The IB allele was inherited from the mother. The husband could only transmit a recessive allele i. But the baby does not carry any recessive allele.
The baby received the IB allele from the mother and the IA allele from another person.
The husband is not the biological father of the baby.
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Biomes are determined by
Answers
Answer:
Biomes are determined by their climate which is determined by percipitation and temperature
Explanation:
There are two main factors when scientists define a biome. One is the climate or the long-time average weather of a region. The other is the specific plants and animals in an area. The organisms in a biome often adapt to their environment. There are seven types of biomes based on these factors.
Hope this helped
In the United States about 16% of the population is Rh negative. The allele for Rh negative is recessive to the allele for Rh positive. If the student population of a high school in the U.S. is 3,000, how many students would you expect for each of the three possible genotypes?
In certain African countries, 4% of newborn babies have sickle-cell anemia, which is a recessive trait. Out of a random population of 10,000 newborn babies, how many would you expect for each of the three possible genotypes?
Answers
In the high school population of 3,000 students, 2,117 students were homozygous Rh positive (AA), 806 students were heterozygous (Aa), and 77 students were homozygous Rh negative (aa).
Given:
Population size: 3,000 students
Rh negative population frequency: 16% (0.16)
From the Hardy-Weinberg equation.
p: frequency of the dominant Rh positive allele
q: frequency of the recessive Rh negative allele
We know that p + q = 1
p = 1 - q = 1 - 0.16 = 0.84.
The expected frequencies of the three genotypes are:
Homozygous Rh positive (AA): p² = (0.84)² = 0.7056
Heterozygous (Aa): 2pq = 2 ₓ 0.84 ₓ 0.16 = 0.2688
Homozygous Rh negative (aa): q² = (0.16)² = 0.0256
Homozygous Rh-positive: 0.7056 ₓ 3,000 = 2,116.8 (approximately 2,117 students)
Heterozygous: 0.2688 ₓ 3,000 = 806.4
Homozygous Rh negative: 0.0256 ₓ 3,000 = 76.8
Sickle-Cell Anemia in a Newborn Population:
Given:
Population size: 10,000 newborn babies
Sickle-cell anemia frequency: 4% (0.04)
p: frequency of the dominant normal allele
q: frequency of the recessive sickle-cell allele
p + q = 1
p = 1 - q = 1 - 0.04 = 0.96.
The expected frequencies of the three genotypes are:
Homozygous normal (AA): p²= (0.96)² = 0.9216
Heterozygous (Aa): 2pq = 2 ₓ 0.96 ₓ 0.04 = 0.0768
Homozygous sickle-cell (aa): q² = (0.04)² = 0.0016
Homozygous normal: 0.9216 ₓ 10,000 = 9,216
Heterozygous: 0.0768 ₓ 10,000 = 768
Homozygous sickle-cell: 0.0016 × 10,000 = 16
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2 Itching and other skin problems are signs that a cat or dog may have fl eas. Fleas are parasites known for their biting and blood-sucking abilities. When they bite, fl ea saliva enters the pet’s circulatory system, sometimes causing an allergic response commonly seen as a “hot spot” on the pet’s neck or the base of its tail
Answers
Itching and other skin problems are signs that a cat or dog may have flea. Fleas are parasites known for their biting and blood-sucking abilities. When they bite, flea saliva enters the pet’s circulatory system, sometimes causing an allergic response commonly seen as a “hot spot” on the pet’s neck or the base of its tail.
Fleas are tiny parasitic insects that infest the fur of dogs and cats. They feed on blood and cause skin irritation that results in itching. If the problem is severe, it can lead to more significant health issues. Pet owners should watch for signs of fleas and treat their pets promptly to avoid complications. Fleas lay eggs on the skin of dogs and cats, which hatch and develop into larvae.
The larvae feed on the skin, shedding as they mature. Adult fleas emerge from the larvae, biting the host to feed on blood. The process repeats itself, with adult fleas continuing to lay eggs on the skin of the pet.The most common sign of fleas in dogs and cats is itching. Pets will often scratch themselves, bite their skin, or lick excessively to relieve the irritation.
Other signs of fleas include red or inflamed skin, hair loss, and the appearance of small, raised bumps on the skin. These bumps are often referred to as "flea dirt" and are the waste products of the fleas. In severe cases, anemia, an allergic reaction, or the transmission of other parasites or diseases can occur.
Flea infestations can be treated with a variety of products, including topical treatments, shampoos, and collars. It is essential to follow the instructions on the product label and treat the pet and the surrounding environment to eliminate the fleas. Prevention is key to avoiding flea infestations, so pet owners should maintain a regular grooming and flea prevention schedule.
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NAMING BRAINLIEST!! Choose all the answers that apply.
Energy in an ecosystem:
is part of an open system
is recycled and reused
flows only one way
is transferred through the food chain
is eventually lost as heat
Answers
Answer:
Energy in an ecosystem: is part of an open system, is recycled and reused, is transferred through the food chain and is lost as heat.
A confluent lesion pattern is when two distinct, but separate, lesions are on one part
of the body (e.g., multiple ant bites on a foot).
- True
False
Answers
Answer: false
Explanation: it means they run together
Answer: The Answer is False
Explanation:
Which phrase describes an extrusive rock
A.) Fine texture
B.) cooled slowly
C.) found deep underground
D.) different easily observed minerals
Answers
Answer:
fine texture
Explanation:
did it on edge
Fine texture describes an extrusive rock. thus option A is correct
What is rock cycle ?Rocks are formed naturally and it is the non-living earth made by collection of mineral grains held together in a firm, it can be tiny or big as well and can be easily identified with their texture.
The Rock cycle is a continuous process through where old rocks are transformed into new rock by a process of cool down of molten magma, when it solidifies become igneous rock.
In a rock cycle, when the break down of these igneous rocks occur small particles that are transported and deposited to form sedimentary rocks, When the igneous and sedimentary rocks heated up and under the pressure they change into metamorphic rocks.
The metamorphic rocks which are subjected under great heat and pressure melt down to form molten magma which again can cool down and solidify into igneous rocks
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Which statement best explains the importance of resource economics? 1. It details the costs of mining processes. 2. It provides fresh water to all areas of the world. 3. It examines the cost and profits of resource use. 4. It sets consistent prices to achieve sustainability.
I need help
Answers
Resource economics is a discipline that examines how societies employ their limited resources. The primary purpose of resource economics is to analyze how resources are developed, utilized, and depleted over time.
In general, the study is concerned with the optimal use of resources in a way that maintains or increases the well-being of people over time.The following statement best explains the importance of resource economics: It examines the cost and profits of resource use. According to resource economics, the optimal use of resources is obtained when the cost of producing and distributing goods is at the lowest possible level, while still guaranteeing that the goods and services are of high quality.
In order to achieve this, resource economics analyses the cost and benefits of resource use, and offers insight into how society can make the most efficient use of its limited resources. Therefore, this statement is the most appropriate, since it clarifies that resource economics is concerned with analyzing the cost and profits of resource use, which is necessary for any community to use its resources in a way that is both sustainable and profitable. Resource economics examines how resources are utilized and depleted over time, with the aim of maintaining or increasing the well-being of people over time.
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Which options describe the structure of a water molecule?
Select all that apply.
the molecule has an overall bent shape
the molecule has an overall straight shape
the hydrogen atoms are attached to the oxygen atom at an angle
the hydrogen atoms are attached at opposite ends of the oxygen atom
Answers
Why is the process for developing a vaccine usually lengthy? A. Obtaining the necessary supplies for testing is complicated. B. Recruiting scientists to work on a vaccine project can be difficult. C. Ensuring that a vaccine is safe requires multiple rounds of human testing. D. all of the above
Answers
Answer:
C. Ensuring that a vaccine is safe requires multiple rounds of human testing
Explanation:
Vaccination is the process whereby a substance called a VACCINE is administered in order to prevent a particular disease. The vaccine is actually a substance given to help the body's defense system combat a particular infection or disease. A vaccine, which is usually a harmless strain of a pathogen, prepares the antibodies of an organism to fight against the actual pathogenic organism.
As rightly said in the question, developing a vaccine can be a very long process. This is because the vaccine has to go through series of testing on healthy humans before releasing to the public in order to ascertain that there are no risks or dangers attached to the usage. The process of ensuring that a vaccine is safe requires multiple rounds of human testing, which is time-consuming.
*WILL MARK BRAINLIEST*
examples for
DNA and Biochemistry
in your own words, not searched please.
Answers
Answer:
Embruology: The studies of how an embryo develop, the study on how chicken embryo develop is an example of Embryology.
Fossils: Example are remains of bones or dead plants.
Dna and Biochemistry: Hair, Saliva, Blood are some example of DNA which can be analyzed
Thank me latur
Psychologists have long determined that intelligence tests contain cultural items that depend on language in assessments. To support various cultural backgrounds and minimize bias they created which types of tests?
Answers
Answer: Cultural fair IQ tests
Explanation: A culture-fair test is test designed to be free of cultural bias, as far as possible, so that no one culture has an advantage over another. The test is designed to not be influenced by verbal ability, cultural climate, or educational level.
Psychologists have created Culture fair test that is free from cultural biases and based on logic.
Culture fair test:
These are the IQ test that based on pure logical reasoning and free from the cultural and language biases.
They are Pictorial hence, very entertaining.The question in the Culture fair test are ordered in increased difficulty level.Therefore, Psychologists have created Culture fair test that is free from cultural biases and based on logic.
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At the end of this phase the cell contains two identical copies of each chromosome, connected to one another at their centers by a structure called______?
Answers
explain how waxes are important to leaves and ducks
Answers
here you go
Explanation:
Plants also use waxes as a protective coating to control evaporation and hydration and to prevent them from drying out. Waxes are valuable to both plants and animals because of their hydrophobic nature. This makes them water resistant, which prevents water from sticking on surfaces.