Assume N securities. The expected returns on all the securities are equal to 0.01 and the variances of their returns are all equal to 0.01. The covariances of the returns between two securities are all equal to 0.005.
What are the expected return and the variance of the return on an equally weighted portfolio of all N securities?
What value will the variance approach as N gets large?
What characteristic of the securities is most important when determining the variance of a well-diversified portfolio?
Can anyone help wit this question? this teacher is crazy
Answers
Answer:
Explanation:
The average covariance between securities will be much more important in determining a portfolio’s risk than the average variance, when the portfolio is “well diversified.”
Related Questions
A particular protein (Vac8) found in yeast has this N-terminal sequence, Met-Gly-Ser-Ser-Cys.... The corresponding DNA sequence in the coding strand is 5' ATG GGC TCA TCG TGC.... If the DNA sequence is mutated to 5' CTG GGC TCA TCG TGC..., what will happen to this VAC8 gene? (in RNA, CUG codes for Leu)
Answers
Answer:
The protein will not be synthesized because this point mutation produces the loss of the start codon (substitution of Met by Leu).
Explanation:
The mutations are changes in the DNA sequence that have diverse effects on protein synthesis. A mutation in the start AUG codon may lead to the reduction and even the elimination of protein synthesis. In consequence, this type of point mutation is usually referred to as 'start-loss mutation'.
Where does the electron-acceptor molecule
transfer electrons?
photosystem 1
photosystem II
the thylakoid space
the electron transport system
Answers
Answer:
The answer is photosystem 1
Explanation:
Tap the THANKS button and RATE ⭐️
(If helpful)
Answer: A.) photosystem I
Explanation: i hope this helps :)
To what kingdom do coccidia belong? Monera, Animalia, Protista, Protozoan
Answers
Answer:
Protozoan
hope this help you
Match the chemical reaction with its correct type.
1. Nat + Cl → NaCl
decomposition reaction
2. CCIA C + 2Cl2
exchange reaction
3. HCl- + NaOH → NaCl + H2O
reversible reaction
4. ADP + P + E = ATP
synthesis reaction
Answers
hope it will help uh.....
Answer:
Match the chemical reaction with its correct type.
1. Nat + Cl → NaCl
decomposition reaction
2. CCIA C + 2Cl2
exchange reaction
3. HCl- + NaOH → NaCl + H2O
reversible reaction
4. ADP + P + E = ATP
synthesis reaction
Explanation:
Match the chemical reaction with its correct type.
1. Nat + Cl → NaCl
decomposition reaction
2. CCIA C + 2Cl2
exchange reaction
3. HCl- + NaOH → NaCl + H2O
reversible reaction
4. ADP + P + E = ATP
synthesis reaction
Besides the HCT, what other component of blood could be measured to give a better understanding of oxygen-carrying capacity? Explain your answer.
Answers
Answer:
The haemoglobin levels or counts can be used.
Explanation:
The oxygen carrying pigment of the blood is the heamoglobin (Hb).it is a protein molecule with for heam groups,Each of the latter can bind with 4 molecules of oxygen in a cooperate bonding.The more oxygen molecules binding by Hb,the more oxygen is carry in RBC.
Therefore if the number of Hb counts is reduced in an individual the volume of oxygen in the RBC of the subject should reduced,Therefore, this should be a good indicator of the lower oxygen capacity of the blood of the individual.
Basically in a physiological female the Hb count/100ml of blood is 12-16g/ml,like wise 13-18g/100mI in a physiological man.
Therefore fluctuations in the levels of these values below the set points is an indicator of distortion in the oxygen carrying capacity of the blood.
The amount of the blood in volume that contains RBC is called Hematocrit. Therefore for accuracy the HCT together with the Hb counts are good indicators of oxygen capacity of the blood.
Hematocrit refers to the volume percentage of the red blood cells in the blood. Oxygen-carrying capacity can be measured by several techniques.
The co-oximetry and Arterial Blood Gas can be used to determine the oxygen-carrying capacity.
The techniques can be explained as:
Co-oximetry is a type of blood test used to measure the oxygen-carrying capacity of the hemoglobin in the blood. The test uses the light of different wavelengths that can pass through the blood to determine oxygen capacity. Arterial blood gas or ABG test is a type of blood test used to measure the pH and oxygen-carrying capacity of the blood present in the artery. It is used to determine the efficiency of the lungs to exchange the gas oxygen and carbon dioxide from the blood.
Thus, the co-oximetry and ABG test can be used to determine oxygen levels in the blood.
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Domesticated dogs are descended from wolves, and modern dog breeds are the result of artificial selection. Imagine that you were given a population of wolves and asked to
ultimately produce Chihuahuas (if you don't know this breed of dog, please Google it).
1. If you had a bunch of wolves and wanted a Chihuahua, how you create one? List just one thing you would do.
2. Explain how your strategy would work.
Hint: Think about what you learned about natural selection.
Answers
Answer:
organisms acclimate over time is by adapting to their habitats and their ecosystem. If i were to make a population of wolves into a chihuahua i would make sure that the habitat is smaller and also the amount of resources available should be less than what they are used to. This should cause them to become smaller to help preserve energy.Once they breed and a favorable genetic is present, that wolf is used to breed with another wolf that has a genetic mutation that would make it smaller and more domesticated. By taking genetic mutations that are a result from these changes you can get a wolf to be more domesticated and become smaller. like a chihuahua
Exchange of respiratory gases takes place in an earthworm through (A) moist skin (B) gills (C) trachea (D) lungs
Answers
The lungs is the answer
Explanation
Earthworms do not have specialized respiratory organs like we do; instead, they take in oxygen and expel carbon dioxide directly through their skin. Oxygen diffuses through the earthworm's body surface and diffuses inward to the network of capillaries lying just under the body surface.
Answer:
I believe skin is the answer on edg.
Explanation:
What is the current classification of bacteria formerly termed members of the Bethesda-Ballerup group? g
Answers
Answer:
Explanation:
This group is made up bacteria that utilizes of citrate and are slow lactose-fermenting. They belong to the family Enterobacteriaceae which share some particular feature with the lactose-fermenting citrobacters.
Thus, they have now been included in the genus Citrobacter with no regards to how fast or slower their lactose fermentation is.
imagine you are a detective examining a crime scene you are trying to identify the person who committed the crime so you collect many samples at the crime scene which sample would be most useful in identifly the person who commited the crime A. a book found on the ground at the crime scene B. a pair of shoes found at the crime scene C. an uneaten burger and fries left at the crime scene D. a piece of fingernail found at the crime scene
Answers
Answer:
The answer would be D
Explanation:
Only logical answer here
How do catalyst work?
Answers
Answer:
Catalysts increase the reaction rate of a chemical reaction, allowing it to use less energy to start a chemical reaction and doesn't change the chemical properties or formulas.
Explanation:
can solor activity cause climate change ?
Answers
Answer:
"It has been suggested that changes in solar output might affect our climate—both directly, by changing the rate of solar heating of the Earth and atmosphere, and indirectly, by changing cloud forming processes..."
- quoted from Google
Explanation:
So yes, it can cause climate change depending on what kind of activities occurs in the solar system.
Bats hunt using echolocation, in which they send and receive high frequency sounds to locate prey. When bats hear the sounds of others,
they typically begin hunting in the same area. As the number of bats hunting in the area increases, individuals become more successful at
locating and capturing prey.
Some populations of bats live in areas with high levels of noise pollution, such as near heavily trafficked bridges. How might the hunting
behavior of bats be affected by such an environment?
A
Bats would be less likely to hunt in groups, so an individual's success in catching prey would decrease.
B.
C.
Bats would be unable to use echolocation, which would prevent them from finding any prey.
Bats would be more likely to hunt in groups, so an individual's success in catching prey would increase.
Bats would be better able to use echolocation, which would improve their ability to find prey.
D.
Answers
Answer:
A
Simply the noise from heavy traffic will cause the destructive interference which reduces the echolocation,blocking the echoes and therefore prevent prey location for bats.
Generally this reduces the Bats' population, as some could not rely on the echo to locate the prey, leading to starving and death. Thus each bat needs to rely on the individual echolocation from the prey to survive as new hunting adaptation.Since the echolocations has been blocked
Answer:
Bats would be unable to use echolocation, which would prevent them from finding any prey.
Explanation:
What is a substrate? a molecule that acts as a catalyst a place where the reaction occurs a place on the product where the enzyme fits a reactant that is catalyzed by an enzyme
Answers
Answer:
a reactant that is catalyzed by an enzyme
Explanation:
Reactants are often referrred to as substrates as those are what enzymes mostly act upon to create products or some desired consequence
Option (d). a reactant that is catalyzed by an enzyme is called the substrate.
SubstrateA substrate exists as a molecule on which an enzyme acts. Enzymes catalyze chemical reactions that concern substrate, where the substrate binds to the enzyme's active site, and an enzyme-substrate complex is created. By action of the enzyme, the substrate exists transformed into a product, released from the active site, and free to obtain another substrate.
Enzyme catalysis exists as the increase in the rate of a process by a biological molecule, an "enzyme". Most enzymes exist in proteins, and most such processes are chemical reactions. Within the enzyme, naturally, catalysis happens at a localized site, called the active site.
The reactant in an enzyme-catalyzed reaction is named a substrate.
Because enzymes can expand reaction rates by enormous factors (up to 1017 times the uncatalyzed rate) and tend to be very precise, typically producing only a single product in quantitative yield, they exist the focus of active research.
Hence, Option (d). a reactant that is catalyzed by an enzyme is called the substrate.
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What is the ecological relationship between the monk seal and the octopus/eel/triggerfish?
Answers
Answer:
The monk seal and the octopus/eel/triggerfish also live in close proximity to each other and have an ecological relationship between them. The monk seals are the predators to octopus/eel/triggerfish in the ocean.
The monk seal preys on octopus/eel/triggerfish in the ocean for their survival and competes with sharks and other marine animals for food.
Hence, the monk seal and the octopus/eel/triggerfish have ecological relationship of the predation in which one animal feed on another.
The ecological relationship between the monk seal and the octopus/eel/triggerfish - predator and prey.
The monk seals are seals with no ear and are found in the tropic climate.
These are the organisms that are live in close proximity to the octopus/eel/triggerfish.The seals are the predators to eels, triggerfish and octopuses at the bottoms of the ocean floor.Sharks are present in the same habitat and feed on the same organisms so they are in competition.Thus, the ecological relationship between the monk seal and the octopus/eel/triggerfish - predator and prey.
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If the herbivore population in an ecosystem increased, what would most likely happen to the size of the carnivore population? It would decrease. It would increase. It would die off. It would remain the same.
Answers
Answer:
I think the Carnivore population would increase
Explanation:
There would be more prey for the Carnivores. Leading to more food, which leads to more mating.
Answer:
well increase because if we look at the food chain or according to it the carnivore would get more food more food leads to mating
hope it helps
Protein is needed for growth and repair.
The digestion of protein begins in the stomach and is completed in the small intestine,
What are the products of the digestion of protein.
Tick the correct box
amino acids
energy
sugars
vitamins
1 mark
Amino acids
O Energy
O Sugars
Vitamins
Answers
Answer:
Amino acids
Explanation:
Hope it helps.
The functions of the oral cavity include all of the following, except:_________a. mechanical processing of food. b. digestion of carbohydrates. c. analysis of material before swallowing. d. lubrication. e. absorption of monosaccharides.
Answers
Answer:
e. absorption of monosaccharides
Explanation:
The oral cavity is the first part of the digestive system where food is received, crushed, mixed with digestive enzymes secreted at that level, and also where the food is turned into the form of bolus before it is being channeled down through the pharynx into the alimentary canal for further digestion.
The oral cavity is also a site for respiration and speech production.
It is made up of the teeth, hard and soft palate, tongue and other vital parts that play different roles in food digestion.
The function of the oral cavity does not include absorption monosaccharides.
when a vegtalble is place in very salty water it becomes shriviled up why does this happen
Answers
Select all that apply.
A food chain or food web can provide good information including
the flow of energy in an ecosystem
the eating patterns of organisms
thing
the types of food that are best for you to eat
how much energy is transferred from one organism to another
MOTORICTION
DCAN NEYT SECTION
ACV AD UUD
Answers
Answer:
the eating patterns of organisms thing
The Punnett square shows the results when two parent cows are crossed.
R represents the allele for red hair, and r represents the allele for white hair.
Which best describes this inheritance pattern?
A) Incomplete dominance because the intermediate form of the trait is chosen
B) Co-dominance because the intermediate form of the trait is chosen C) Incomplete dominance because the offspring display alleles for both hair colors
D) Co-dominance because the offspring display alleles for both hair colors
Answers
Answer:
A
Explanation
the red haired trait is dominant over the white haired trait. and the results are all red haired offspring. therefore its incomplete dominance
The correct option is D) Co-dominance because the offspring display alleles for both hair colors.
What is Co-dominance?Co-dominance refers to a phenomena, in which both alleles are simultaneously expressed in the heterozygote.
Incomplete dominance is closely related to Co-dominance in which phenotype of the progeny is intermediate of the parent phenotype.
Here, the red haired trait is dominant over the white haired trait and still both alleles are simultaneously expressed in the heterozygote of the offspring with red and white hair traits, thus, the Co-dominance best describes this inheritance pattern.
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What is the primary cause of weather due to?
Answers
Answer:Temperature Wind Pressure Moisture. Sun.
Explanation:
Answer:
What is the primary cause of weather due to?
The answer is The state of the atmosphere.
Explanation:
I hope this helps :)
Sara was hit in her head during a collision on the soccer field. As a result, Sara is having difficulty with balance and implicit memories. Sara probably damaged her:_________. 1. reticular formation pons 2. amygdala 3. thalamus 4. cerebellum
Answers
Answer:
The correct answer is option 4. cerebellum.
Explanation:
The cerebellum gets information from the sensory system, the spinal cord, and different pieces of the brain and afterward regulates motor movements. The cerebellum organizes voluntary developments, for example, balance, posture, coordination, speech, and balanced muscular activities.
It also deals with the short term or implicit memory. If Sara injured her head and found having difficulty with balance and implicit memories. Sara probably damaged her cerebellum.
Thus, the correct answer is option 4. cerebellum.
Key deer are found only on certain islands in the Florida Keys. Populations are typically small enough that genetic drift has caused significant deviation among populations on different islands. For example, the population on No Name Key has allele frequencies of A1 = 0.43 and A2 = 0.57 while the population on Big Pine Key has allele frequencies of A1 =0.21 and A2 = 0.79. Construction of roads has recently increased migration rates between these populations to approximately 0.08 per generation. What will the frequency of A1 be on Big Pine Key after a single generation of migration from No Name Key?
Answers
Answer:
The frequency of A1 be on Big Pine Key after a single generation of migration from No Name Keyp is 0.2276
Explanation:
Whenever it occurs migration between two populations, there is genetic flux going on. Genetic flux might be considered as an evolutive strength only if migration > 0 and if the allelic frequency in one generation is different from the allelic frequency in the next generation.
Genetic flux acts homogenizing the allelic frequencies between the two populations, and it might introduce variability.
By knowing the allelic frequencies in both populations at a certain time and the migration rate, we can calculate the allelic frequencies of populations in the next generation. This is:
pA₂=pA₁(1-m)+pB₁ m
pB₂=pB₁(1-m)+pA₁ m
Being
A one population and B the other population pA₁ and pB₁ the frequencies of the p allele before migration, pA₂and pB₂ the frequencies of the p allele after migration, m the migration rateIn the exposed example, we know that:
No Name Key population allelic frequency: A1 = 0.43 and A2 = 0.57Big Pine Key population allelic frequency: A1 =0.21 and A2 = 0.79Migration rate m=0.08Let´s say that p represents A1 allele, and q represents A2 allele.
The frequency of A1 allele (p) be on Big Pine Key (Population B) after a single generation of migration from No Name Key (Population A)
pB₂=pB₁(1-m)+pA₁ m
pB₂=0.21 x (1 - 0.08) + 0.43 x 0.08
pB₂= 0.2276
The allelic frequency in a population after one generation is the allelic frequency of individuals of that population that did not migrate (21 x (1 - 0.08) plus the allelic frequency of the new individuals that came from the other population (0.43 x 0.08).
You can corroborate your result by calculating the q allele frequency in the next generation and summing both of them up. The result should be one.
qB₂= qB₁(1-m)+qA₁ m
qB₂= 0.79 x (1 - 0.08) + 0.57 x 0.08
qB₂= 0.7724
p + q = 1
0.2276 + 0.7724 = 1
For a population to be in Hardy-Weinberg equilibrium, the population must be
Answers
Answer:Not experiencing migration.
Compare the potential energy stored in lipids,proteins, and carbohydrates. In which order does the body look for these molecules as a source of energy.
Answers
Answer:
carbohydrate,lipids then protein
You are now taking a ride on the Magic School Bus with Ms. Frizzle. This bus is magic because it can go anywhere within the body. Today’s lesson is on Central Dogma. Ms. Frizzle takes your class directly to the nucleus to start your field trip. Since this trip is about the central dogma, what three major cellular process will be involved? Where will you bus be going within the cell during each of these processes? For each process, describe in your own words and in general what is going on?
Answers
Answer:
See the answer below
Explanation:
The trip will involve a bit of stoppage inside the nucleus during which replication and transcription will take place before proceeding to the cytoplasm where synthesized mRNA will become translated into protein.
The central dogma refers to a series of processes during which genetic information in the DNA of a cell is encoded and expressed in living cells. The 3 major steps involved in these processes are:
1. Replication
2. Transcription
3. Translation
Replication involves the synthesis of a double-stranded DNA molecule from a template of another double-stranded DNA molecule within the nucleus. In order words, replication is a process during which a DNA molecule reproduces itself. Each of the strands of the DNA acts as a template for the synthesis of another new strand. Eventually, 2 new double-strand DNA molecules are formed each consisting of one old strand and one new strand.
During transcription, the information contained in deoxyribonucleic acids is encoded and transcribed into another molecule known as the messenger ribonucleic acid. This process happens in the nucleus of the cell.
After transcription and processing of the mRNA produced, the resulting mRNA is then transported to the cytoplasm where, together with the ribosome and transfer RNA, the encoded information becomes translated into protein. Each of the genetic codes in the mRNA is translated to their respective amino acids and the amino acids are linked together by peptide bonds to form a protein.
The protein thorain is encoded by the gene thrL, and thorain is a negative regulator of the thrMN operon. Assume there is no other regulation taking place. Predict the phenotype of a thrL- mutant that encodes a nonfunctional thrL protein.
a. The thrM and thrN genes would be transcribed at higher levels compared to non-mutant.
b. The thrM and thrN genes would be transcribed all lower levels compared to non-mutant.
c. The thrM and thrN genes would not be transcribed
Answers
Answer:
The correct answer is option a, that is, the thrM and thrN would be transcribed at high levels in comparison to non-mutant.
Explanation:
Based on the given information, in the existence of thorain the expression of thrM and thrN will be prevented as thorain functions as a negative regulator. In case, if the gene, which codes for thorain, that is, thrL gets mutated, the coding for the functional thorain would get prevented.
With the encoding of the non-functional thrL protein, there would be an enhancement in the expression of thrN and thrM genes and it will get transcribed at higher levels in comparison to the non-mutant or the wild-type.
Which is an example of how the cell membrane of a tube worm maintains a
stable environment?
O A. It communicates with other cell membranes.
OB. It prevents salt from flowing in.
O c. It allows the temperature to change quickly.
OD. It allows large molecules to enter.
Answers
Answer:
It prevents salt from flowing in.
Explanation:
so the tubeworm's cell membrane prevents minerals from flowing in and salt is a mineral so it won't allow salt to flow in.
Answer:
it prevents minerals in the water from flowing into the cell
Explanation:
APEX
WHEN ARE TREES CARVED UNDER WHICH CONDITIONS CAN IT GROW UP AGAIN?
Answers
Answer:
Explanation:
In critical conditions since when a forest is cut down if it rains the land is not in a condition for trees to flourish since every time it rains you will see a flood devastating any plant that tries to grow.
the procces of filtration occures at the
Answers
Answer:
The process of filtration (or filtrate formation) occurs at the filtration membrane.
Explanation:
The filtration membrane is located at the boundary between the glomerulus and Bowman's capsule.
:)