Within a school of fish, each individual keeps a constant distance from its neighbors as they swim. When viewed from farther away, the entire school of fish moves together in a tight group .
Based on this information , which two patterns of distribution are exhibited by the fish?
A regular pattern
B standard pattern
C random pattern
D clustered pattern
Answers
Related Questions
Comparable segments of the mitochondrial DNA sequences of two similar species are shown below. This segment of DNA mutates at a rate of two base pair per 330,000. years. The DNA sequences for Species A is CTGTCCGAAG and Species B is CTGTCCGTCG. How many years ago did these species diverge from a common ancestor? 660,000 years ago
33 years ago
330,000 years ago
6,000 years ago
Answers
The homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.
What is the mutation rate?The mutation rate indicates the number of nucleotide differences between two homo-logous sequences that emerged in evolution in a given period of time.
In this case, the mutation rate is one nucleotide per 330,000 years and here we have two mutations (CTGTCCGAAG and CTGTCCGTCG), thereby it is expected that the sequences diverged 660,000 years ago.
In conclusion, the homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.
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explain how you would go about creating a genetically engineered goat that expresses human growth hormone in its milk?
Answers
Creating a genetically engineered goat that expresses human growth hormone in its milk involves isolating the HGH gene,constructing a recombinant DNA molecule, introducing it into goat cells, generating transgenic goats.
Here is a general overview of the process:
1. Selecting the donor DNA: The first step is to identify and isolate the DNA sequence that encodes for human growth hormone. This can be done by analyzing the DNA sequence of human cells and identifying the specific gene responsible for producing the hormone.
2. Cloning the genetics: Once the DNA sequence for the human growth hormone gene has been identified, it needs to be cloned. This involves copying the gene and inserting it into a vector, which is a type of carrier molecule that can be used to transfer the gene into a host organism.
3. Preparing the goat cells: The next step is to obtain a sample of goat cells that will be used to create the genetically modified goat. These cells are typically obtained by taking a small biopsy from the ear or another easily accessible area of the goat. 4. Introducing the gene: The cloned human growth hormone gene is then introduced into the goat cells using a variety of techniques, such as electroporation or viral vectors. This process can be challenging and requires expertise in molecular biology and genetic engineering.
Overall, creating a genetically engineered goat that expresses human growth hormone in its milk requires advanced knowledge and techniques in molecular biology and genetic engineering. It is also important to adhere to ethical and safety guidelines to ensure that the process is carried out responsibly and with minimal risk to the animals involved.
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Chains of blank form polymers?
Answers
Answer:
Chains of linked carbon and hydrogen atoms
Explanation:
How do male bears fighting over female bears result in an overall better adapted beat population?
Answers
This phenomenon produces a better generation because competition gives rise to a most adapted population with higher fitness.
What is natural selection?Natural selection refers to the differential reproduction of individuals in a population which lead to its evolution across time.
The better-adapted individuals will have more chances to reproduce and therefore they will perpetuate their genes in the offspring (next generation).
In conclusion, this phenomenon produces a better generation because competition gives rise to a most adapted population with higher fitness.
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Example Mechanism of evolution
1. As habitats change, populations of northern pine trees that were once separated can now exchange pollen. This exchange of genes between populations is allowing the previously isolated gene pools to mix. The mechanism of evolution is _______.
2. A sudden volcanic eruption kills many members of a population of elk. By chance, the individuals that remain do not have the same mix of genes as the original population. The mechanism of evolution is _______.
3. Although millions of prairie chickens once roamed the Midwest, their numbers dwindled to only 50 individuals in the 1990s. These few individuals have since produced a larger population. The genetic variation among the current population is quite low. The mechanism of evolution is _______.
4. Insecticide resistance among mosquitos is spreading around the world after mutations that originate in one population are spread to other populations through matings. The mechanism of evolution is ______.
5. Researchers discovered that female gray tree frogs prefer to mate with males who sound the longest mating calls. The mechanism of evolution is _______.
6. Tristan da Cunha is a remote island in the Atlantic Ocean. In 1814, 15 people formed a colony there, one of whom carried a rare gene for blindness. The frequency of this gene is now 10 times higher on the island than on the mainland from which the settlers arrived.
Answers
Answer:
what ru saying?
Explanation:
Each electron in a many-electron system _____ other electrons from the nucleus because electron-electron _____ to some extent counteract the nuclear attraction and the energy of an orbital.
Answers
Each electron in a many-electron system shields other electrons from the nucleus because electron-electron repulsion to some extent counteracts the nuclear attraction and the energy of an orbital.
This shielding effect, also known as screening or electron shielding, arises due to the repulsive interaction between negatively charged electrons. The inner electrons shield the outer electrons from the full nuclear charge, reducing the net positive charge experienced by the outermost electron.
As a result, the effective nuclear charge experienced by an electron is lower than the actual nuclear charge, which affects the energy and properties of orbitals in a many-electron system. The concept of electron shielding is important in understanding atomic and molecular structure and reactivity.
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what is the mass of the reactants in the following equation
N2 + 3 H2->2NH3
A.28.0g
B.30.0g
C.34.0g
D38.0g
Answers
Answer:
It's C.
Explanation:
I just looked it up
Answer:
c. 34.0g respuest correct
Which two characteristics do seedless vascular plants have that nonvascular plants do not have?
A) they have phloem and true stems
B) They have roots and use spores to reproduce
C) They live in moist environments and have xylem
D) They have phloem and use spores to reproduce
Answers
Answer:
C) They live in moist environments and have xylem.
Mt. Paricutin erupts explosively. Little lava helps build the cinder cone. It is almost all ash and rock. What type of magma does it most likely contain?
1) Basaltic
2) Andesitic
3)Rhyolitic
40 Pyroclastic
Answers
Why is a water molecule polar?
Answers
Answer: Because of the unequal share in electrons
Explanation:
The repair of the epidermis after a wound begins as basal cells produce new
A) elastic fibers
B) collagen fibers
C) reticular fibers
D) dense connective tissue
E) keratinocytes
Answers
Answer:
e) keratinocytes
Hope this helps :) !!!
The repair of the epidermis after a wound begins as basal cells produce new keratinocytes. These keratinocytes proliferate and differentiate to form new layers of the epidermis. At the same time, fibroblasts produce new collagen fibers, which are organized in a network to provide a framework for the new tissue formation.
The answer to the question is letter E) keratinocytes.
Collagen fibers are responsible for the skin's tensile strength, so their production is crucial for wound healing. The deposition of collagen fibers is a slow process, and it can take weeks for a wound to be filled with new connective tissue. As the collagen fibers are deposited, fibroblasts start to contract, causing the wound to contract, and bringing the edges of the wound closer together. This process is called wound contraction and helps to close the wound faster.
When the new tissue is formed, the keratinocytes migrate towards the surface, producing keratin and filling the wound with new epidermis. The epidermis is the outermost layer of the skin, and it acts as a barrier to protect the body from the environment. The repair of the epidermis is essential to restore the skin's barrier function, and it can take several weeks for the epidermis to be fully repaired.
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Two species of sunflowers grow on either side of a mountain. For a while, the two sunflower populations evolve separately. With the climatic changes, an animal population crosses from one side of the mountain chain to the other, bringing some sunflower pollen with it. This movement is called
a.Gene Flow
b.Mutation
c. Genetic Drift
d. Artificial Selection
Answers
Answer:
answer is option A) gene flow
explain how the respiratory and urinary systems act to correct acid-base disturbances.
Answers
The respiratory and urinary systems play crucial roles in maintaining acid-base balance in the body, helping to correct acid-base disturbances.
The respiratory system primarily regulates the levels of carbon dioxide (CO2) and oxygen (O2) in the body. When there is an excess of carbon dioxide, the respiratory system increases the rate and depth of breathing, allowing for more CO2 to be exhaled, which helps to decrease the acidity in the body. Conversely, when there is a decrease in CO2 levels, the respiratory system reduces the breathing rate to retain more CO2 and prevent alkalosis.
The urinary system, specifically the kidneys, regulates the levels of bicarbonate (HCO3-) and hydrogen ions (H+) in the body. The kidneys can reabsorb or excrete bicarbonate ions and hydrogen ions to adjust the pH of the blood. In cases of acidosis, the kidneys can increase the reabsorption of bicarbonate ions and excrete excess hydrogen ions to restore the acid-base balance. Similarly, in cases of alkalosis, the kidneys can decrease the reabsorption of bicarbonate ions and retain hydrogen ions to bring the pH back to normal.
Overall, the respiratory system acts quickly to regulate carbon dioxide levels, while the urinary system works more slowly but has a longer-lasting effect on the balance of bicarbonate and hydrogen ions. Together, these systems help maintain the pH within a narrow range and correct any acid-base disturbances that may occur in the body.
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A dad has the genotype of AO and mom has the genotype of OO for blood
types. What percentage of offspring will have Type A blood? What are the
genotypes of all four potential offspring?"
Your answer
Answers
Answer:
0% will have type A blood. the 4 potential offspring genotypes are: AO, OO, AO, OO.
Explanation:
using a table, if you cross them, there is no way you'll get pure A blood. you can get AO blood, but never AA since that isnt on the table. then just use another table which ill find the name of later.
Compare and Contrast Differentiate between DNA replication in prokaryotes and DNA replication in eukaryotes.
Answers
The basic process of DNA replication is similar in prokaryotes and eukaryotes, but there are significant differences in the details of how replication occurs in these two types of organisms.
What is DNA replication?
DNA replication is a fundamental process that is essential for the survival and reproduction of all living organisms.
While the overall mechanism of DNA replication is conserved between prokaryotes and eukaryotes, there are some key differences in the way that DNA replication occurs in these two types of organisms.
Here are some of the differences between DNA replication in prokaryotes and DNA replication in eukaryotes:
DNA polymerases: In prokaryotes, DNA replication is carried out by DNA polymerase III. In eukaryotes, DNA replication is carried out by multiple DNA polymerases.
Origin of replication: Prokaryotes have a single origin of replication on their circular chromosome, while eukaryotes have multiple origins of replication on their linear chromosomes.
Chromosome structure: Prokaryotes have a single circular chromosome that is not associated with histones, while eukaryotes have multiple linear chromosomes that are tightly packed with histone proteins.
Replication speed: Prokaryotes replicate their DNA much faster than eukaryotes.
Proofreading: Eukaryotic DNA polymerases have a built-in proofreading mechanism that can detect and correct errors in the newly synthesized DNA. In contrast, prokaryotic DNA polymerases do not have this proofreading ability and instead rely on a separate repair mechanism to correct errors after replication has occurred.
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The resting potential of a resting neuron is caused by
Answers
Answer:
A resting (non-signaling) neuron has a voltage across its membrane called the resting membrane potential, or simply the resting potential. The resting potential is determined by concentration gradients of ions across the membrane and by membrane permeability to each type of ion.
Explanation:
hopefully that helps?
The resting potential of a resting neuron is caused by the differences in ion concentration of the intracellular and extracellular fluids and the relative permeabilities of the plasma membrane to different ion species.
What is neuron?Neurons also known as nerve cells are the basic components of the brain and nervous system.
They are the cells that receive sensory information from the outside world, give motor orders to our muscles, and convert and relay electrical impulses at every step along the way.
What is resting potential of neuron?The electrical charge imbalance that exists between the inside of electrically excitable neurons (nerve cells) and their surroundings is known as resting potential.When a cell is not stimulated, its resting membrane potential is defined as the electrical potential difference across the plasma membrane. The electrical potential differential across a cell membrane has traditionally been represented in terms of its value inside the cell compared to the extracellular environment.The K+ that leaks from the interior of the cell to the outside via leak K+ channels creates a negative charge on the inside of the membrane compared to the outside, resulting in the resting membrane potential. Because all of the Na+ channels are closed at rest, the membrane is impermeable to Na+.To know more resting potential of neuron here
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From an evolutionary standpoint, why is sexual reproduction considered an advantage over asexual reproduction?
Answers
Because sexual reproduction produces genetic variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage. a disease is less likely to affect all the individuals in a population.
A population of 40 killer whales lives in a bay that measures 2000 square miles. What is the population density of killer whales?
Answers
Answer:
.02
Explanation:
When finding population density, divide the amount of people, animals or things in the region by the total square miles. 40/2000 is .02.
A population is the size of the group of individuals residing at a place. A population of 40 killer whales has a population density of 0.02.
What is population density?Population density is the individual's concentration of a specific species at a particular geographical location. It allows the establishment of the ecosystem and health.
Given,
Number of individulas = 40
Size of the area = 2000
Density = Number of individuals ÷ Size of the area
= 40 ÷ 2000
= 0.02
Therefore, 0.02 is the population density of killer whales.
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Una persona hala un trineo a lo largo de un espacio horizontal de 9 m la cuerda con que sa hala forma un ángulo de 60° con la horizontal y la fuerza para mover el trineo es de 125 N a. Calcular el trabajo realizado por la persona al halar el trineo
Answers
Answer:
978,75 Newton metro.
Explicación:
El trabajo realizado es de 978,75 Newton metro cuando la fuerza es de 125 newton, la distancia es de 9 metros y el ángulo es de 60 grados porque cuando usamos la fórmula del trabajo realizado obtenemos esta respuesta. La fórmula del trabajo es fuerza x desplazamiento x Sin (θ). θ muestra la dirección y el ángulo en el que se realiza la fuerza. Entonces, multiplicando todos estos valores obtenemos la respuesta para el trabajo realizado, que es 978,75 Newton metro.
An object will accelerate in the direction of the force applied to it.
-1st law
-2nd law
-3rd law
Answers
1.) Leaves which exits in the desert have a thick waxy cuticle which A. allows the plants to absorb water B. allows water to easily run off C. reflects excess light, which conserves water D. absorbs all the light
Answers
Answer:
C
Explanation:
Sunlight causes evaporation (loss of water), but if you are able to reflect that light away, you are able to conserve water.
is black coffee a strong or weak acid ?
Answers
Answer:
Coffee often gets branded as an acidic drink, but in fact, coffee comes in at around a five on the pH scale, which is actually less acidic than drinks like beer, orange juice, and even soda.
A place where living and nonliving things interact, such as forests and deserts is called a(n)
ecosystem
population
community
habitat
Answers
Answer: ecosystem
Explanation:
In holly trees, Red fruit (R) are dominant to white fruit (r), and spiny leaves (L) are dominant to smooth leaves (l). Complete the dihybrid Punnett Square to figure out how many of the new holly trees from this cross would be excpected to have white fruit and smooth leaves??
A. 1
B. 2
C. 3
D. 9
Answers
Answer:
All answers are in the image
16. How are convection currents in the asthenosphere associated with mid-ocean ridges?
Answers
Answer: GoodMorning: ) Ok so this happens When two oceanic plates are pushed away from each other, magma rises to the surface between the plates and creates a ridge.
Explanation: In places where convection currents rise up towards the crust's surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig. 7.21). Hot magma rises to the crust's surface, cracks develop in the ocean floor, and the magma pushes up and out to form mid-ocean ridges.
Have a Nice day <3 ✨
2. (a) What is the biological role of ATP?
Answers
A type of cell division that results in the formation of two genetically identical daughter cells is known as ___
Answers
Answer:
Meiosis
Explanation:
What’s the one link between osmosis and chlorela?
Answers
Answer:
Chlorella vulgaris broth harvesting via standalone forward osmosis using seawater draw solution.
In gamete intrafallopian transfer (gift), fertilization occurs in? the uterus. a uterine tube. a testis. a culture dish.
Answers
Fertilization in gamete intrafallopian transfer (GIFT) occurs in a uterine tube.
What is uterine tube ?Eggs and sperm are transferred directly into the fallopian tubes as part of the GIFT fertility procedure. The sperm and eggs are taken from the man's testes and the woman's ovaries respectively. Then using a laparoscope the sperm and eggs are combined in a lab before being injected into the fallopian tubes. A small abdominal incision is used to introduce the laparoscope a narrow telescope-like tool.
A generally safe and successful fertility procedure is GIFT. About 20–25% of GIFT cycles are successful. Accordingly 20–25% of women who receive GIFT will become pregnant.
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what is the biologcal feature to determine a rajidea shark
Answers
One of the key biological features to determine a Rajidae shark is the presence of thorn-like structures, known as dermal denticles, on their skin. These denticles give the skin a rough texture and are unique to sharks.
1. Dermal Denticles: Rajidae sharks possess dermal denticles, which are specialized scales that cover their skin. These denticles are composed of dentin, a hard substance similar to the material found in our teeth.
2. Thorn-like Structures: The dermal denticles in Rajidae sharks often have a thorn-like appearance. These structures protrude from the skin's surface and give the shark's skin a rough texture.
3. Location on the Body: The dermal denticles are distributed all over the body of Rajidae sharks, including the dorsal (upper) side, ventral (lower) side, and the fins.
4. Unique to Sharks: Dermal denticles are a characteristic feature found exclusively in sharks. They serve multiple purposes, including reducing drag in the water, protecting the shark's skin, and aiding in locomotion.
5. Identification: By examining the presence of dermal denticles and their thorn-like structures, researchers and experts can identify and differentiate Rajidae sharks from other species.
6. Additional Features: Apart from dermal denticles, other biological features like body shape, fin structure, and presence of specific reproductive organs can also be used to determine the exact species within the Rajidae family.
By considering these biological features, particularly the presence of thorn-like dermal denticles, scientists and enthusiasts can accurately identify a shark as belonging to the Rajidae family.
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