A scientist measured an increase in nitrous oxide in the atmosphere this increase would result in
How do scientists know when life began?
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
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.A scientist investigates two types of cells located in different parts in the
human body. Cell A contains many more mitochondria than Cell B. What is
the best conclusion to make from this observation?
A. Cell A has a larger vacuole than Cell B.
B. Cell A produces more protein than Cell B
C. Cell B does less work than Cell A.
D. Cell B creates more energy than Cell A.
Answer:
Mitochondrion.The function of mitochondrion is it used as a site for cellular respiration.
Respiration produces energy as the end product.
so,the higher the amount of mitochondrion,the higher the energy produced by respiration.
Question 1
If the cells and their genes are functioning normally.,
Answer:
If the cells and their genes are functioning normally so then the body of organism grow and develop rapidly.
Explanation:
Cell is a basic unit of life. Each cell contains about 30,000 genes which are responsible for performing different functions in the cell. Cell only activated a small portion of gene not the whole gene. Genes are made of DNA which helps in the production of proteins necessary for the normal functioning of the cell. If the cell and their genes are functioning normally so the body of living organisms also work properly and grow quickly.
Fungi are important decomposers in terrestrial ecosystems. Some fungi are able to break down lignin in plants, through the production of an enzyme called lignin peroxidase, something that no other organism can do. The ability to break down lignin by some fungi is reflected by which of the statements?
A. Expression of genes necessary to break down lignin were lost in lineages that are not in the evolutionary history of fungi.
B. A mutation occurred in a gene found in some fungi, and the enzyme produced is able to break down lignin.
C. Many organisms have the end to producentymes for breaking down lignin but do not express those genes
Answer:
The correct answer is option B. "A mutation occurred in a gene found in some fungi, and the enzyme produced is able to break down lignin".
Explanation:
The unique trait of expressing lignin peroxidase that some fungi have in order to break down lignin must have being the result of natural selection. Natural selection works under the premise of "survival of the fittest", where a spontaneous mutation gives an advantageous trait to an individual that makes it more likely to survive and reproduce. In this case breaking down lignin gives some fungi the advantage of being able to feed from wood.
Which of the following wrap around neurons and speed up signals
Explanation:
myelin sheath ..........
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
In laborador retrievers, pigment color is influenced by two genes. Gene A determines the type of pigment produced and gene B affects whether the pigment gets deposited in the hair shaft. If two heterozygous black laborator retrievers were crossed and offspring were produced in a ratio of 9 black dogs to 3 brown dogs to 4 yellow dogs, what are the genotypes of the
Answer:
Black dogs = A_B_
Brown dogs = aaB_
Yellow dogs = A_bb and aabb
Explanation:
In laborador retrievers, pigment color is influenced by two genes. Gene A determines the type of pigment produced and gene B affects whether the pigment gets deposited in the hair shaft. If two heterozygous black laborator retrievers were crossed and offspring were produced in a ratio of 9 black dogs to 3 brown dogs to 4 yellow dogs, what are the genotypes of the offspring?
Gene A determines colored pigment.
Gene B ensures that the colored pigment is deposited.
Two heterozygous black laborador retrievers were crossed.
AaBb x AaBb
Progeny
9 A_B_
3 A_bb
3 aaB_
1 aabb
Since there were 9 black, 3 brown and 4 yellow dogs, the possible genotype of the different colors are:
Black dogs = A_B_
Brown dogs = aaB_
Yellow dogs = A_bb and aabb
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
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.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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which would best describe the process of natural selection
Answer:
D individuals that are well adapted to their environment survive
Please help me if you know help me with 2 and 3 please
Answer:
2.)how much a certain area can hold is carrying compacity
3>)if a disease killed most of the producers the species would have a chance of dying out
Explanation:
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.
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
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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Analyze the given diagram of the carbon cycle below. Part 1: Which process does arrow F represent? Part 2: Explain how matter is conserved during the process. Part 3: Justify why this process is a recycling of carbon in the carbon cycle. Use complete sentences to explain your answer.
Answer:
F means oxygen from plant goes into the atmosphere.Explanation:
2. matter is conserved in this process because plants take carbon dioxide from the atmosphere for photosynthesis then produces oxygen into the atmosphere, animals then feed on plants and later the animal's faecal matter is released into the soil and even when animals die, microorganisms in the soil break I down into absorbable form for plants use. which makes matter conserved.
3. mater is in a circular state from atmosphere to plants to animals to soil then absorbed by plants to restart the process again.
hope it helps .
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:
Hope That Helps :)
Transfer RNA molecules pick up amino acids
which are free in the cytoplasm and carry them to
which process occurs during the light dependent reactions in photosynthesis
Answer:
Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2.
The process occurs during the light dependent reactions in photosynthesis is "Split water molecule occurs."
What is photosynthesis?Plants utilize sunlight, water, as well as carbon dioxide to produce oxygen or energy in the type of sugar in a process known as photosynthesis.
What is light dependent reactions?
The thylakoid membranes are the site of light-dependent reactions. The light-independent reactions happen in the stroma, which is located outside the thylakoid membrane, and thus the lumen, which is located inside.
The power storage molecule ATP and even the reduced electron transporter NADPH are produced by the light-dependent processes using light energy, which is required for the subsequent stage of photosynthesis. Light reactions in plants occur in the thylakoid membranes of organelles referred to as chloroplasts.
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1 and 3 please help me
Answer:
it's so hard and deep
Which molecule could he make that consist of long chains of red and black colored balls
Answer:
The red balls here refers to the hydrogen and black balls refers to carbon.
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
does a dog like me? Is scientific or nonscientific
Answer:
dogs loves there owners and to be a owner you must love and to love you need to really love :)
Explanation:
so if your a good person to call your self a owner then yes you are!!!
Answer:
Non scientific.
Explanation:
Whether or not a dog likes you cannot be truly proven, and is more of a subjective query. A dog cannot really like or dislike a person. They can trust or not, they can be loyal or not, dominating or not, and such things, but “like” is an extremely opinionated term.
Which is inference? You measure A plants height every day for a week-you give a plant the same amount of water every day-every day for a week you collect data on a plants movement- After watching a plant for a week, you determine it needs more sunlight
Answer:
After watching a plant for a week, you determine it needs more sunlight
Explanation
Inference is a conclusion so you concluded the plant needs more sunlight.
Maximum oxygen uptake, or V02max, is the point at which the rate of oxygen consumption reaches a platesu despite an increased workload. Consider the scenarios below, then click and drag each label into the appropriate category based on whether it increases Vo2max, decreases VOzmax, or neither
Lactic acid accumulaton Being male Being sedentary Training for a marathon
Centrai fatigue Being temale Gernting older weight raining
Results Iin Higher VO,max Results in Lower V02max Neither
Answer:
A. Results in higher vo2 max.
1. training for the marathon
2. weight training.
B. Results in lower vo2 max
1. lactic acid accumulation.
2. getting older
3. sedentary lifestyle
4. being female.
C. Neither.
1. being male
2. central fatigue
Explanation:
VO2 max is the measurement of the maximum oxygen consumption during continuously increasing exercise. Higher VO2 means the body is consuming a higher level of oxygen and delivering to muscles without muscle loss on this basis we can sort the following scenarios
A. Results in higher vo2 max.
1. training for the marathon (more oxygen consumption)
2. weight training. (more oxygen consumption)
B. Results in lower vo2 max
1. lactic acid accumulation.
2. getting older (less oxygen consumption and less oxygen delivery to muscles)
3. sedentary lifestyle (less oxygen consumption and less oxygen delivery to muscles)
4. being female.
C. Neither.
1. being male
2. central fatigue
A. Effects in higher vo2 max.
1. training for the marathon
2. weight training.
B. Outcomes in lower vo2 max
1. lactic acid accumulation.
2. getting older
What is the Maximum oxygen?
VO2 max is the measure of the maximum oxygen consumption during constantly increasing exercise. Higher VO2 represents the body is downing a higher level of oxygen and also delivering it to muscles without muscle loss on this basis we can sort the following scenarios
A. Effects in higher vo2 max.
1. training for the marathon (more oxygen consumption)
2. weight training. (more oxygen consumption)
B. Consequences in lower vo2 max
1. lactic acid accumulation.
2. getting older (less oxygen consumption and less oxygen delivery to muscles)
3. sedentary lifestyle (less oxygen consumption and less oxygen delivery to muscles)
4. being female.
C. Neither.
1. being male
2. central fatigue
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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.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
