how do cells in a multicelluar organism become specialized
Answer:
Explanation:
Each type of cell in a multicellular organism has slightly different DNA, allowing the different types of cells to specialize. ... The genes necessary for different types of cells to function segregate into different cell types in a multicellular organism.
How could a tropical storm affect you personally?
Answer:
it can stress you out because of the danger you're in
Which of the following is an environmental cost of agriculture?
A. Reduced biodiversity
B. More crop rotation
C. More cash crops
D. Reduced soil erosion
Answer:
A. Reduced biodiversity
A farmer is raising rabbits. The average body weight in his population is 3kg. The farmer selects the 10 largest rabbits in the population, whose average body weight is 4kg, and interbreeds them. If the heritability of body weight in the rabbit population is 0.7, what is the expected body weight among the offspring of the selected rabbits?
Answer:
The expected weight increase that is expected of offspring of selected parents is 0.7 kg
Explanation:
Given from the question:
The average body weight in his population of rabbits = 3 kg
heritability of body weight in the rabbit population (h^2)=0.7
Average body weight of the 10 selected largest rabbit =4 kg
(R) = response to selection
selection differential (S)= Average body weight of the 10 selected largest rabbit - The average body weight in his population of rabbits
selection differential (S)= 4-3=1 kg
But heritability of body weight in the rabbit population (h^2)=0.7
Then, Heritability of body weight in the rabbit population (h^2) can be calculated using the formula below;
Heritability of body weight in the rabbit population (h^2)=
response to selection (R) / selection differential (S)
response to selection (R) = Heritability of body weight in the rabbit population (h^2) × selection differential (S)
R= h^2 x S= 0.7 x 1kg= 0.7 kg
The expected weight increase that is expected of offspring of selected parents is 0.7 kg
Average weight of offspring = The average body weight in his population of rabbits + heritability of body weight in the rabbit population (h^2)
Average weight of offspring= 3 kg + 0.7 kg = 3.7kg
Therefore, the Average weight of offspring is 3.7kg and The expected weight increase that is expected of offspring of selected parents is 0.7 kg
What is occurring when a transport protein uses energy to pump a solute against its gradient across a
cell membrane
Answer:
Active transportation
Explanation:
Active transportation is happening because energy is need to pump against the gradient. Whenever energy is used the transportation is active.
In what phase do the organelles disperse out into the daughter cells, and the cell prepares for cytokinesis?
1. Prophase
2. Interphase
3. Mitosis
4. Telophase
Under certain circumstances, potassium ions ( K+K+ ) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is −70.5 mV−70.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane?
Answer:
the change in the electrical potential energy of a single potassium ion as it moves across the membrane is 1.12941 × 10⁻²⁰ J
Explanation:
The formula used in determining the change in the electrical potential energy can be expressed by the relation.
Charge in electrical Potential energy = [tex]q ( V_2 - V_1)[/tex]
where q = the potassium ion
q = 18 electrons and 19 protons
q = 19-18 = 1 electron
1 electron = 1.602 × 10⁻¹⁹ Coulombs
Thus;
the potential inside the cell is −70.5 mV
= -70.5 × 10⁻³ V
∴ Charge in electrical Potential energy = [tex]q ( V_2 - V_1)[/tex]
Charge in electrical Potential energy = [tex]1.602*10^{-19} ( 0 - (-70.5*10^{-3})[/tex]
Charge in electrical Potential energy = 1.12941 × 10⁻²⁰ J
Thus; the change in the electrical potential energy of a single potassium ion as it moves across the membrane is 1.12941 × 10⁻²⁰ J
during drought years on the galapagos,small easily eaten seeds become rare, leaving mostly large, hard-cased seeds that only birds with large beaks can eat. if drought continues for several years, measurable changes to the beak size of the galapagos bird population can be observed. which of the following identifies the changes to the beak size of the galapagos bird population what would most likely be expected as a result of natural selection? a) more small-beaked birds dying than larger beaked birds. the offspring produced in later generations have a higher percentage of birds with large beaks. b) small birds gaining larger beaks by exercising their mouth parts c) small birds mutating their beak genes resulting in later-generation offspring having larger beaks d) small birds anticipating the long drought and eating more to gain weight, resulting in them growing larger beaks
Answer:
A) More small-beaked birds dying than larger beaked birds
Explanation:
Natural selection will cause the small-beaked birds to die, while large-beaked birds will begin producing more birds with that gene. This causes large-beaked birds to become dominant, and less and less small-beaked birds will survive.
Hope this helps!
Answer:
A.
Explanation:
Considering that the seeds have changed to where larger birds can only consume them (or birds with larger beaks, anyways..) then smaller beaked birds would die or as a result of the changing in the food supply.If the food supply revolves around having a stronger or larger beak, then birds with larger beaks are more likely to flourish.
Which is a method of making many copies of DNA?
O A. Nuclear transfer
B. Gel electrophoresis
C. Reverse transcriptase
D. Polymerase chain reaction
Answer:
D. Polymerase chain reaction
Explanation:
PCR is very percise; used to amplify or copy a specific DNA target from a mixture of DNA molecules by:
two short DNA sequences (primers) are bind to start and end the DNA targetperform the PCR; DNA templates is added to a tube that contains primers, free nucleotides, and the enzyme (DNA polymearse)it is mixed in a PCR machine that increases and decreases the temperature of the samplemixture is heated to seperate the double strnaded DNA templated into single strandsmixture is cooled so the primers can bind to the DNA templatethe DNA polymerase will synthesize to new strands of DNA from the primersduring synthesis, the end of the first cycle, the DNA molecule will consist of a new and old DNA strandPCR continues with added cycles to repeat the stepsnewly synthesized DNA segements serve as templates in later cycles; which can be copied over and over.You have a strain of bacteria that is defective for DNA glycosylase activity. You expose one culture of this strain to EMS and the other to cisplatin (a chemotherapy drug that creates bulky adducts on purine bases). You notice that the cisplatin is much more toxic to this mutant strain of bacteria than is the EMS. Explain your observation.
Answer:
Bacteria under successive rounds of selection may acquire genetic resistance to the treatment with mutagenic compounds including ethyl methanesulfonate (EMS).
Explanation:
Artificial selection is a process known to generate resistance of the organisms under treatment. For example, this type of selection has been reported to generate resistance to the treatment with different chemical compounds including mutagenic chemical compounds (in this case EMS), antibiotic drugs, etc.
When meiosis is complete, what has been produced?
O A. Four haploid cells
O B. Two diploid cells
O C. Four diploid cells
O D. Two haploid cells
Answer: Four haploid cells
Explanation: APE
What happens to ADP after ATP hydrolysis? It is used to make glucose. It is broken down for energy. It is expelled from the body. It is used to make ATP.
Answer:
It is used to make glucose
Explanation:
Hope it helps .
Answer:
It is used to make Glucose.
Explanation:
gradpoint
Which describes the correct pairing of DNA bases?
O A. T with C, and A with G
OB. T with T, and C with C
O C. T with A, and C with G
O D. T with G, and A with C
Answer:
[tex] \boxed{C. \: T \: with \: A, \: and \: C \: with \: G} [/tex]
Explanation:
In dsDNA the bases in the two strands are paired through hydrogen bonds forming base pairs (bp). Adenine forms two H-bonds with thymine from opposite strand and vice-versa. Similarly, guanine is bonded with cytosine with three H-bonds. As a result, always a purine comes opposite to a pyrimidine.
A - T & G - C
what features of meiosis are important in sexual reproduction
Answer:
The daughter cells are identical to the mother cell in shape and size but different in chromosome number. The daughter cells are haploid. Recombination and segregation take place in meiosis. The process occurs in the reproductive organs and results in the formation of gametes.
Explanation:
During sexual reproduction, meiosis generates genetic variation in offspring because the process randomly shuffles genes across chromosomes and then randomly separates half of those chromosomes into each gamete. The two gametes then randomly fuse to form a new organism.
Why do most multicellular organisms require more than just diffusion to facilitate gas exchange? What is the other process called? Name all the places in our body where these two different processes occur (i.e. where do we get diffusion and where do we get the other process).
Answer:
The description including its problem is described throughout the segment below on explanation.
Explanation:
Surface layer influences combustion efficiency, the larger the surface region, the more and more fuel traded. Hence, gills as well as lungs become established in the organism's purpose of providing an enormous surface area for both the necessary currency value of gas towards the outer atmosphere.
The ranges among gas exchanger as well as shallow tissues become ideal through dissemination to fulfill the necessity so a range of respiratory substances is required. Respiratory interfaces are coated with epithelial cells to allow exchanging of gases.The oxygen through both the respiratory system would be transferred into the bloodstream, as well as the RBC collect the CO2 from the cells it to the lungs for oxygenation. Exterior ventilation, oxygen absorption from capillaries to CO2 absorption from capillary to alveoli. Inner ventilation happens at the surface including its body cells.Which substance reduces the level of acid in blood?
sodium
bicarbonate
urea
nitrogen
Answer:
Bicarbonate
Explanation:
Transfer RNA molecules pick up amino acids
which are free in the cytoplasm and carry them to
The resource competition model of sympatric speciation requires: A. divergent/disruptive selection driving character displacement. B. directional selection driving character displacement. C. evolution of reproductive isolation D. Both A & C E. Both B & C
Answer:
The correct answer is option D, that is, both disruptive selection and evolution of reproductive isolation.
Explanation:
The phenomenon of the evolution of a novel species from a thriving ancestral species and at the same time both continue to live in a similar geographical area is termed as sympatric speciation. Due to reproductive isolation of the population of species that were thriving in a similar habitat, the phenomenon of sympatric speciation results.
On the other hand, sympatric speciation also results due to disruptive selection as in the process the extreme kind of individuals within the population are favored over the hybrids.
Which is a density-independent factor in controlling a population? A. Floods B. Access to light C. Water supply D. Predators
Application of biotechnology in Agriculture
Answer:
Biotechnology can be used to engineer GMOs, or genetically modified organisms. These GMOs can be resistant to viruses, diseases, etc. that make them more desirable. One example is virus-resistant squash, a GMO that is resistant to viruses that often destroy fields of the squash. This GMO yields much more fruit and saves farmers' energy and resources. Biotechnology has been very useful in the agriculture industry for reasons such as the ones listed above, it can prevent crop decay and many more issues by engineering GMOs.
which of the following represents a testcross
A- t? x tt
B- XX x XY
C-T? x Tt
D- T? x TT
Answer:
The option should be like this:
A- T? x tt
Explanation:
In an inheritance pattern in which a particular allele is exhibiting doiminance over the other, the dominant phenotype can either be homozygous or heterozygous. Hence, it is impossible to tell the genotype of a dominant phenotype by merely observing it. A cross called TEST CROSS is used.
A test cross is a cross used to determine the actual genotype of a dominant phenotype i.e. whether it is homozygous or heterozygous by crossing tye unknown genotype with a homozygous recessive parent. If all of the offspring of this cross have a dominant phenotype, it means the dominant parent is HOMOZOGOUS but if offsprings with an equal ratio of dominant and recessive phenotypes are produced, it means the dominant parent is HETEROZYGOUS.
In this case, the dominant phenotype whose genotype is unknown is (T*) while the recessive parent will be (tt).
Answer:
a
Explanation:
nteractions between organisms and their environment impact the organism’s overall population. The jaguar Panthera onca is the largest cat in North America. It is found in areas across the Southwest, including Arizona, New Mexico, and Texas. It is a carnivore that has powerful jaws and sharp teeth and preys on fish, turtles, tapirs, and many smaller mammals. Which shows the relationship between the jaguar and turtles?
This question is incomplete because the options are missing, here is the question and the options:
Interactions between organisms and their environment impact the organism’s overall population. The jaguar Panthera onca is the largest cat in North America. It is found in areas across the Southwest, including Arizona, New Mexico, and Texas. It is a carnivore that has powerful jaws and sharp teeth and preys on fish, turtles, tapirs, and many smaller mammals. Which shows the relationship between the jaguar and turtles?
A. Adaptation principle
B. Competitive exclusion principle
C. Predator-prey relationship
D. Niche principle
The correct answer is C. Predator-prey relationship
Explanation:
In a prey-predator relationship, one organism which is the predator feeds on another animal known as the prey. Additionally, predators hunt and kill their prey, which is essential for predators to obtain nutrients and survive. Besides this, predators can hunt and feed on only one type of animal or hunt and feed on different types of animals. This relationship occurs between the jaguar and the turtle because the jaguar hunts, kills, and eats the turtles, which means jaguars hunt and kill other animals to get nutrients. Also, in the case of the jaguar, this hunts different animals including fish, tapirs, turtles, and small mammals.
Answer:
predator-prey relationship
Explanation:
edge
There is a large tree growing in the middle of the lawn. You notice that there are lots of daisies in the lawn, but none under the tree. Suggest two hypotheses to explain why there are no daisies under the tree. Choose one of your hypotheses and make a prediction from it which can be tested by an experiment. Describe an experiment which could be done to find out if the prediction is correct.
Answer and Explanation:
Hypothesis:
1- No daisies can grow under the tree because its canopy does not allow enough radiation to reach the ground under it.
2- No daisies can grow under the tree because it changes the soil composition and pH.
Prediction:
Daisies grow better and faster when they are completely exposed to solar radiation.
Experiment:
30 daises young plants, grown under the same conditions, will be planted in three different parcels. Planting will take place during spring.The three parcels will have the same soil, with all the nutritional requirements that daisies need to grow properly. The three parcels will be watered every day to keep equal humidity conditions. The variable under study is the radiation, so this is the only factor that will differ between parcels. One of the parcels will be completely exposed to solar radiation. A second parcel will receive sunlight during half of the day, while the other half of the day will be under the shadow. The third parcel will be completely under the shadow (no radiation will reach this parcel). Daisies will be grown for four months. Every fifteen days all the plants will be counted in each parcel to check their survival. Their length will be measured, and the presence of new leaves, floral buttons, and ramifications will be registered. The size of the leaves and flowers will also be registered. After four months, data will be analyzed to evaluate how does the radiation influence the plants' growth.What makes a molecule a carbohydrate?
Round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. Which Punnett square represents the correct way to set up the cross RRYy ´ RrYY? A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R y, r Upper Y, r y. The rows are labeled Upper R Upper Y, Upper R y, r Upper y, r y. A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R y, r Upper Y, r y. The rows are labeled Upper R Upper Y, Upper R y, Upper R Upper y, Upper R y. A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R Upper Y, r Upper Y, r Upper Y. The rows are labeled Upper R Upper Y, Upper R y, Upper R Upper Y, Upper R y. A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R Upper Y, r Upper Y, r Upper Y. The rows are labeled Upper R Upper Y, Upper R Upper Y, Upper R Upper Y, Upper R Upper y.
Answer:
A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R Upper Y, r Upper Y, r Upper Y. The rows are labeled Upper R Upper Y, Upper R y, Upper R Upper Y, Upper R y.
Explanation:
This question involves a dihybrid cross i.e. two distinct genes; one coding for seed shape and the other for seed colour. The alleles for round seeds (R) and yellow seeds (Y) are dominant over the alleles for wrinkled seeds (r) and green seeds (y) in the first and second gene respectively.
In a cross between a RRYy and RrYY parent, each will undergo meiosis and produce the following combinations of gametes;
RRYy- RY, Ry, RY and Ry
RrYY- RY, RY, rY, and rY
These gametes will be used to construct a punnet square, which is a square-shaped diagram used to determine the possible genotypes that will be produced by two parents. The punnet square has 4 columns and 4 rows. The four possible gametes of one parent are filled into the four columns and the four possible gametes of the other parent are filled into the four rows (see attached image).
Hence, if the gametes of parent RrYY are filled into the four columns. The columns will labelled:
RY, RY, rY and rY
Also, if the gametes of parent RRYy are filled into the four rows. The rows will be labelled: RY, Ry, RY, and Ry.
This makes the third option correct.
Answer:
its c on edge 2020
on the top row it says
RY RY rY rY
on the side row it says
RY Ry RY Ry
Explanation:
i took the test
he Punnett square shows the cross for a particular trait between a homozygous dominant parent and a heterozygous parent. What is the probability the offspring will be heterozygous for this trait? 25% 50% 75% 100%
Answer:
50%
Explanation:
Let's make a Punnett square to represent this, with X representing our dominant allele and x our recessive.
One homozygous dominant parent = XX
One heterozygous parent = Xx
X X
X XX XX
x Xx Xx
So two out of our four outcomes are heterozygous for the trait. That means the answer is B. 50%.
The probability the offspring will be heterozygous for this trait is 50%
What are the features of heterozygous traits?Heterozygous is the presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles.
If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair.
To be heterozygous for a trait is to have different alleles for it. Being homozygous for a trait means that it will always turn out the same.
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A man with type AB blood is married to a woman with type O blood. They have two biological children, and one adopted child. The children’s blood types are: A, B, and O. Which child was adopted?
Answer:
The adopted child is the one with type O blood.
Explanation:
Available data:
A man with type AB blood is married to a woman with type O blood. They have two biological children and one adopted child.The man´s genotype for blood type is AB (Codominant type of blood) and the woman´s genotype for blood type is OO, as this type of blood is expressed by two recessive alleles.
Cross:
Parental) AB x OO
Gametes) A B O O
Punnet square) A B
O AO BO
O AO BO
F1) Half of the biological progeny will be AO and the other half BO.
There are no possibilities that any of the biological child could be OO. This means that the adopted child´s blood type is O and the biological children´s blood type are A and B.
You conduct a series of two-point mapping crosses involving five genes located on chromosome III and obtain the following percentage of recombinant offspring:
h-cu eyg-h eyg-cu rai-eyg rai-h rai-cu th-cu th-h th-eyg th-rai
23.5% 9.0% 14.5% 18.5% 9.5% 33.0% 6.8% 16.7% 7.7% 26.2%
Considering that rai is near the end of chromosome III, construct a map of these genes. Drag gene names to blue targets and map distances to pink targets.
a. 6.8
b. 7.7
c. 9.0
d. 9.5
1. cu
2. eyg
3. h
4. th
1. The genes for miniature wings (m) and garnet eyes (g) are approximately 8 map units apart on chromosome 1 in Drosophila. Phenotypically wild-type females (m+g / mg+) were mated to miniature-winged males with garnet eyes (mg / mg). Which of the following phenotypic classes reflect offspring that were generated as a result of a crossover event?
a. miniature wings,
b. wild-type eyesminiature wings,
c. garnet eyeswild-type wings,
d. garnet eyeswild-type wings,
e. wild-type eyes
2. If 800 offspring were produced from the cross, in what numbers would you expect the following phenotypes?
a. wild-type wings, wild-type eyes :_____.
b. miniature wings, wild-type eyes :_____.
c. wild-type wings, garnet eyes :_____.
d. miniature wings, garnet eyes:_____.
Answer:
I am not a doctor
Explanation:
I am sorry
sport hunting seasons are regulated to the fall so that
Answer:
Explanation:
Sport hunting seasons are regulated to the fall so that surplus animals are taken before the challenges of winter. Process of changing the natural community to encourage the increase in populations of certain desirable species.
Sport hunting seasons are regulated to the fall so that surplus animals are taken before the challenges of winter.
By scheduling hunting seasons during this time, it allows for the preservation of reproductive individuals and ensures the survival of future generations.
Additionally, fall is a time when many migratory species are on the move, providing opportunities for hunters to engage in their activities.
Furthermore, regulating hunting seasons to the fall can help control wildlife populations, preventing overpopulation and the associated negative impacts on ecosystems. Finally, fall hunting seasons often align with cultural traditions and the availability of leisure time for hunters.
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is the vaccine effective ?
Answer:
A 2012 meta-analysis found that flu vaccination was effective 67 percent of the time; the populations that benefited the most were HIV-positive adults aged 18 to 55 (76 percent), healthy adults aged 18 to 46 (approximately 70 percent), and healthy children aged six months to 24 months (66 percent).
Explanation:
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