PCR, or the polymerase chain reaction, is a chemical reaction that molecular biologists use to amplify pieces of DNA. This reaction allows a single or a few copies of DNA to be replicated into millions or billions of copies.
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The possibility of all genotypes of offspring in a genetic cross is calculated by a graphical representation which was developed by
(a) Komberg
(b) T.H. Morgan
(c) Gregor Mendel
(d) Reginald Punnett
Answer:
(d) Reginald Punnett
Explanation:
Reginald Punnett, an English geneticist, invented one of the simplest methods for calculating the mathematical probability of inheriting a specific trait. As a result, his method became known as a Punnett Square. It is the most basic graphical method for discovering all possible genotype combinations that may occur in offspring, which were named dihybrid cross and monohybrid cross.
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Answer:
(d) Reginald Punnett
Explanation:
The representation of the genetic cross can be done by a tool known as Punnet square, which was back then proposed by Reginald Punnet. With this method, this scientist designed a way to measure how probable is a genotype frequency to occurs among the offspring.
So the answer to this question is (d) Reginald Punnet.
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Conditions under which natural selection occurs in a population of iguanas are described in the table below: Natural Selection Description Condition Description A Iguanas that were good swimmers and divers had the advantage of finding food in the water over other iguanas B The larger hatchlings produced by larger female iguanas had a higher chance of survival Which factor contributes to natural selection for each condition? Condition A represents competition, and Condition B represents differential reproductive success. Condition A represents differential reproductive success, and Condition B represents competition. Condition A represents inherited variation, and Condition B represents competition. Condition A represents competition, and Condition B represents inherited variation. Please help! I will give Brainlist!
Answer:
Condition A represents differential reproductive success, and Condition B represents competition.
Explanation:
I took the test 5 times
Answer:
Condition A represents differential reproductive success, and Condition B represents competition.
Explanation:
A is showing Natural Selection while B is representing competition for their survival to still be intact.
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Before DNA could definitively be shown to be the genetic material in cells, scientists had to show that it could
a. tolerate high temperature
b. carry and make copies of information
c. be modified in response to environmental conditions
d. be broken down into small subunits
Answer:
B
Explanation:
DNA can be carried and multiplied
Answer:
B) carry and make copies of information
Explanation:
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Which statement is NOT true about chlorophyll?
1. It makes leaves green
2.it turns into glucose during photosynthesis
3.it absorbs light from the sun
4.it is found in the chloroplasts
Why is it crucial that the daughter cells have identical copies of dna after replication?.
Answer:
Whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
Explanation:
The explanation is basically what I had for the answer.
Hope I gave the right answer. It would be wrong for you to have a wrong answer.
Y is the dominant gene for yellow color in beetles and y is the recessive gene for red color. A yellow beetle that has one red parent is crossed to a red beetle that has two yellow parents. These two beetles have baby beetles. What are the genotypes of the three generations in this situation?
Answer:
TANONGIN MO SI SLING
MARIE'S
Explanation:
BECAUSE IT GIVES ANSWER
How do organisms form carbon films?
Answer:
when an organism is covered by sediment,it begins to decay, when decaying,the organism releases a gas.This process in turns leaves a thin film of carbon that preserves part of the organisms.The hallow that forms on the sediment is the carbon film that contain fossils of the organism.
What kind of cell is this?
.
animal
plant
Answer:
correct its animal cell
Explanation:
believe in yourself, hope this helps:)
6. Maria has two different genes for blood type.
Answer:
the is true
Explanation:
What in the atmosphere returns to earth through the process of ___
Answer: The water cycle is the endless process that connects all of that water. It joins the Earth's oceans, land, and atmosphere. ... When molecules of water vapor return to liquid or solid form, they create cloud droplets that can fall back to Earth as rain or snow—a process called condensation.
Explanation:
Precipatation
Would you predict that blooms are more commonly reported now than in the past, just as commonly reported, or reported less now? Explain
Answer:
It depends. Please look at the explanation.
Explanation:
Since the question does specify what the reference was, I will be referring to different time periods. This question is a bit complicated, and I apologize in advance that this answer will most likely be very long.
There are many things that affect how often these blooms are reported. For example, when people still lived in close colonies, they covered less water mass than now (also because of the population differences). However back then, there probably wasn't as many algae blooms since the environment wasn't as contaminated.
1.) People are more likely to report these sightings when they don't know much on the subject - If you look in the past, humans have been trying to create a reason for everything. When there was a natural disaster, and they didn't understand it, they said that the divine beings were angry. When people got lucky, they called it fate, or that they had the favor of the god/God/god(s). In the 1700s, the first algae bloom was reported. Of course, they didn't have enough information on the matter and tried to blame it on something. If they saw it again, they might take it as a bad omen and immediately report it. This would increase the percentage of blooms reported that happened around the civilization.
2.) There is a matter of population difference - In the 1800s, there was approximately one billion people in the world. This population is nearly two times the population in 1700 CE (population: 600 million). Of course, seeing as people started to migrate / spread out across the land, there would be more rivers/bodies of water that are near a civilization. This means that they should, hypothetically, have a larger number of blooms reported. (Note that it is a larger number and not percentage)
3.) Environmental Contamination - As the population rapidly grows, there is a lot more inventions, experiments, technology, and development happening. This also means that the over populated cities such as London would have worse sanitary conditions. (This statement applies only to the before bacteria & other microorganisms were discovered.) Improper disposal of waste would ultimately lead to land and water contamination, which results in more algae blooms appearing. Trash could have also gone to the middle of the ocean. Algae blooms that appear in the middle of the ocean most likely wouldn't get reported, as it isn't located near a civilization. In this case, the percentage would decrease, since the ratio would be off.
Conclusion:
There are many factors that are involved in this complicated problem. It is also impossible for me to decide which had more algae blooms reported, also because it wasn't specified whether the question was asking for the number or the percentage. Since I cannot properly answer this problem, I listed the major things to think about.
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Which resource do coal-fired power plants require to generate electricity? plants soil sunlight water
Answer:
Ores
Explanation:
Answer: sunlight
Explanation:
02.07 photosynthesis
Answer:
Photosynthesis 02.07RITA RIFFI
sunlight is made in to a chemical energy using chlorophyll. Then uses energy to convert co2 and water in to glucose.
Photosynthesis is the process by which plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose (a type of sugar) and oxygen. This process occurs in the chloroplasts of plant cells.
Here is a step-by-step explanation of the process of photosynthesis:
1. Light Absorption: Chlorophyll, a pigment found in chloroplasts, absorbs sunlight. This light energy is essential for photosynthesis to occur.
2. Conversion of Light Energy: The absorbed light energy is used to power a series of chemical reactions that convert carbon dioxide and water into glucose. This process is called the light-dependent reaction.
3. Production of ATP and NADPH: During the light-dependent reaction, energy is stored in the form of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate). These molecules act as energy carriers in the next step of photosynthesis.
4. Carbon Fixation: The ATP and NADPH produced in the light-dependent reaction are used in the Calvin cycle, also known as the light-independent reaction or the dark reaction. In this step, carbon dioxide is converted into glucose using the energy stored in ATP and NADPH.
5. Release of Oxygen: As a byproduct of photosynthesis, oxygen gas is released into the atmosphere. This oxygen is essential for the survival of many organisms, including humans.
Overall, photosynthesis plays a crucial role in the Earth's ecosystem by providing oxygen and producing food for organisms. It is an essential process that sustains life on our planet.
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Plants can reproduce sexually and asexually. Which statement below best describes why one method might be more beneficial than the other?
O Sexual reproduction provides genetic variation to plants to help them survive in a changing environment.
O Asexual reproduction allows plants to avoid having to care for their offspring.
O Asexual reproduction allows plants to skip the process of finding a mate.
O Sexual reproduction guarantees that two plants will provide nourishment for new plantlets.
Answer:
Sexual reproduction provides genetic variation to plants to help them survive in a changing environment.
Explanation:
This would be the most beneficial because more plants would live if the environment changes. Things like finding a mate or more care for there offspring would not be as beneficial because it would not matter as much for the population. I think that having a good population would be the most beneficial.
Sexual reproduction provides genetic variation to plants to help them survive in a changing environment. So the correct option is A.
What is sexual reproduction?Sexual reproduction is the process through which two individuals of various sexes combine their genetic material to create new species. In the majority of organisms, reproductive cells called gametes, which mate to create a diploid zygote, have chromosomes in their nuclei that carry the genetic material. The zygote grows into a new person. The most common method of reproduction among living things is sexual reproduction.
A remarkable variety of children, each with a genetic make-up different from that of its parents, may occur from sexual reproduction because it permits the rearranging of genetic material both within and between members of one generation. With the exception of bacteria, all creatures that reproduce sexually share the creation of haploid, uninucleate gametes that combine during fertilization to create diploid, uninucleate zygotes.
The organism's chromosome count is once again decreased by meiosis at a later point in its life cycle in order to create the gametes for the following generation. A majority of forms have a big egg and a minute sperm; the gametes may be equal in size (isogamy) or one may be somewhat larger than the other (anisogamy) (oogamy).
Therefore the correct option is A.
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what ions are more concentrated inside the cell than the outside?
Answer:
ions concentrate inside than the cell outside
Explanation:
When the membrane is at rest, are the sodium ions more concentrated inside the cell or outside? Where are the potassium ions more concentrated?
Sodium ions are more concentrated outside the cell, and potassium is more concentrated inside.
Sodium ions are more concentrated outside the cell, and potassium is more concentrated inside.
What are the functions of sodium ions?The Importance of Sodium in Biology Sodium ions are found primarily inside human cells, such as Nerve Cells. They are responsible for regulating the flow of water across the membrane. They are required for the transport of sugars and amino acids into the cells of an organism.
Sodium ions are required for the absorption of glucose and amino acids in the small intestine. These molecules are absorbed into the intestinal cells via co-transport channels that are driven by sodium ions.
When the cell membrane is depolarized by a few millivolts, sodium channels activate and inactivate within milliseconds. Influx of sodium ions through the integral membrane proteins comprising the channel depolarizes the membrane.
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Which of the following statements would best express cultural relativism? a. ""i don’t understand how they could deal with that gross food."" b. ""this is making my stomach upset just by watching."" c. ""i wonder why they decided to make food out of worm paste."" d. ""eating worms can't be nutritious.""
The best statement that expresses cultural relativism is "I wonder why they decided to make food out of worm paste.
What is Cultural relativism?Cultural relativism is the capability to comprehend a culture on its own terms and not to make conclusions using the standards of one's own culture. The purpose of this is to promote awareness of cultural traditions that are not normally part of one's own culture.
Thus, "I wonder why they decided to make food out of worm paste", expresses cultural relativism.
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A student is using a compound light microscope is observing cells undergoing mitotic cell division. If the cells are from a bean plant, which process could the student observe
Answer:
that student might be able to see the pairing of homologous chromosomes
Explanation:
Several structures work together to allow flowering plants to reproduce. The diagram shows a typical flower. Which table correctly identifies the function of each structure or group of structures in the reproduction of the plant?.
According to the image, X is for attracting pollinators, Y is for the production of pollen, and Z is for the production of eggs
Parts and functions of flowersThe image shows the different parts of a typical flower.
X is a petal. Petals are usually colorful and serve to attract insect pollinators to flowers.
Y consists of the anther and the stigma. Both represent the male organ of the flower and produce the male gametes, otherwise known as pollens.
Z consists of the stigma, the style, and the ovary. They all represent the female reproductive organ of the flower. Pollen lands on the stigma, travels through the style, and reaches the ovary. The ovary houses the ovule or the eggs.
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Is neptunium an example of a compound, an element, a solution, or an alloy
Answer:
A compound
Explanation:
NASA's Apollo mission in Kennedy Space Center, Florida, ended in 1972. Which of these was the most likely consequence of the end of the Apollo mission in Florida? increase in unemployment among local people decrease in the use of space technology in the location establishment of many restaurants and shops in the vicinity increase in profit made by local housing and construction industry
Answer: establishment of many restaurants and shops in the vicinity
People realized that NASA was going to later launch more rockets and spacecraft, so many restaurants and shops were created for buisness.
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Where do scientists think the water on earth might have come from?.
Answer:
Most of the water indeed might have come from asteroids, but some portion of today's water must have come from the solar nebula.
Which of the following best describes the function of the brain?
A.
It provides the body with direction one needs to walk.
B.
It provides the cranial nerves with impulses.
C.
It provides the interpretative power that dictates how to behave.
D.
It provides the knowledge needed to think.
Answer:
C. It provides the interpretative power that dictates how to behave.
Explanation:
This diagram shows the digestive system. Which of the following are true about its organs? The basic unit of life in all these organs is the cell. Each organ is made up of tissues. They must work together for a person to survive. Together they form an organ system.
please help
Answer:the basic unit of life in all these organs is the cell
Explanation:
The cell is the smallest part and (unit of structure) and the center of function in all living things
In telophase II, ______ _____________ daughter cells are being formed. They are called ___________________.
In telophase II, 4 daughter cells are being formed. They are called haploid occur in meiosis II.
What is meiosis ?
Meiosis is the process where a single cell divides twice to produce four four haploid daughter cells which are otherwise called as gametes; It can occur in two substages such as meiosis I and meiosis II.
Meiosis I consist of substages like Prophase I where nuclear envelope disintegrates, Chromosomes begin to condense, Spindle fibers appear.
Secondly Prometaphase I where Spindle fibers attach to the centromere followed by Metaphase I.
The homologous chromosomes align at the equatorial plate, Anaphase I where he homologous chromosomes move towards the opposite poles.
Telophase I where Spindle fibers disappear, Cytokinesis I where the cytoplasm and the cell division result in 2 non-identical haploid daughter cells. same events are occurred in meiosis II.
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Because of erosion over time, Location W on the topographic map will have the same elevation as Location X on the map.
How much will this erosion change the elevation at Location W, to the nearest meter?
Record your answer in the boxes below. Be sure to use the correct place value.
Answer:
9
Explanation:
The contour lines on this map are 20 units.
Location W is currently at 1349 units while X lies on the contour line for 1340.
To find change in elevation:
1349-1340=9 units
can you consider having wavy hair as a case of incomplete dominance pattern?why you say so?
Answer:
Explanation:
Hair type is an interesting case of something called incomplete dominance. What this means is that with hair type, if you have one of each version of the gene, you get a mix of the two or wavy hair. So for hair type, CC gives curly, Cs gives wavy and ss gives straight hair. Back to your specific situation.
What type of biological molecule is this?
protein
nucleic acid
lipid
carbohydrate
Answer:
Lipid
Explanation:
lipids are comprised of a glycerol and three fatty acid tails.
Answer:
lipid
- the fatty acids are bonded to a glycerol signifying as a lipid
Read the clues given below to classify an unknown organism. Clue 1: A single-celled organism with no specialized organelles Clue 2: Found in hot water springs and thermal vents What is the correct classification of the organism? Domain Bacteria; Kingdom Eubacteria Domain Archaea; Kingdom Eubacteria Domain Bacteria; Kingdom Archaebacteria Domain Archaea; Kingdom Archaebacteria.
Answer:domain bacteria, kingdom, eubacteria
Explanation:
Answer:
Domain Archaea; Kingdom Archaebacteria
Explanation:
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The concentration (or titer) of antibody to a specific antigen can be determined using a ________ test.
The concentration (or titer) of antibody to a specific antigen can be determined using an ELISA test.
What is the principle of the ELISA test?The basic principle of the ELISA reaction is the immobilization of one of the reagents on a solid phase, while another reagent can be bound to an enzyme, preserving both the enzymatic and immunological activity of the antibody.
With this information, we can conclude that the concentration (or titer) of antibody to a specific antigen can be determined using an ELISA test.
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What partial contributes almost no mass to an atom
Answer:
The number of electrons does not factor into the overall mass, because their mass is so small.
Explanation:
Because protons and neutrons each have a mass of 1, the mass of an atom is equal to the number of protons and neutrons of that atom.