The pairing of complementary strands of DNA due to hydrogen bonding is called semi-conservative replication.
DNA replicationThe biological process of creating two identical copies of DNA from a single original DNA molecule is known as DNA replication. All living things replicate their DNA, which is the primary mechanism for biological inheritance. This is necessary for:
cell division during tissue development and repair, and it also guarantees that each new cell gets a copy of the DNA.A double helix (two linear strands that run counterclockwise and twist together) of two complementary strands makes up DNA.
These strands are split apart in the replication process. The mechanism of semiconservative replication uses each strand of the original DNA molecule as a template to create its counterpart. The new helix will be made up of an original DNA strand as well as a freshly synthesized strand as a result of semi-conservative replication.
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Matthias Schleidan and Theodore Schwann discovered plant and animal cells. This led to which of the cell theory?
Answer:
He put forward cell hypothesis which states that bodies of animal and plants are made up of cells. Schleiden and Schwann in 1839 compared their findings and formulated cell theory.
which of the following statements is not true of both pcr & dna sequencing?
a. Both use ddNTPs to prematurely terminate DNA synthesis. Many viruses contain the reverse transcriptase enzyme. Because it produces DNA in vitro, it is not employed in the Sanger method.
DNA polymerase primers, in letter A. This is false because the in-vitro synthesis of DNA must first be started before DNA polymerase primers can be used. The polymerase chain reaction can enzymatically amplify certain DNA segments up to a million times, specified by the sequence of two oligonucleotides (PCR). The creation of sequencing templates, either directly from genomic DNA or from cloned inserts, is one of the technique's most important applications.
The complete question is:
Which of the following statements is NOT true of both PCR & DNA sequencing?
Select one:
a. Both use ddNTPs to prematurely terminate DNA synthesis
b. Both require a primer for initiation
c. Both are based on in vitro DNA synthesis
d. Both use DNA polymerase to catalyze the reaction
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What do you think would happen to a plant leaf if the
stomata were on the top side of the leaf and always
open? Explain your answer.
If the stomata were on the top side of the leaf and always open, the plant leaf would likely overheat and dry out due to increased exposure to direct sunlight.
What do you mean by stomata?
Stomata are microscopic pores found on the surface of plant leaves and stems. They are responsible for controlling the exchange of gases such as oxygen, carbon dioxide and water vapor between the plant and the atmosphere. They also regulate the amount of water lost through transpiration.
The plant would quickly lose its moisture through transpiration, and the leaf may become damaged or die. Additionally, the plant would be unable to absorb carbon dioxide for photosynthesis, resulting in stunted growth and poor health.
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Put the following phyla in order from least diverse (in terms of number of named species) to most diverse: Annelida, Mollusca, Arthropoda, Rotifera.
a. Annelida, Rotifera, Mollusca, Arthropoda
b. Mollusca, Rotifera, Annelida, Arthropoda
c. Rotifera, Annelida, Arthropoda, Mollusca
d. Rotifera, Annelida, Mollusca, Arthropoda
d. Rotifera, Annelida, Mollusca, Arthropoda
Rotifera is a phylum that contains around 2000 known species, which makes it the least diverse among the four phyla mentioned. Annelida is a phylum that contains around 15,000 known species, which makes it slightly more diverse than Rotifera but less diverse than Mollusca and Arthropoda. Mollusca is a phylum that contains around 85,000 known species, which makes it more diverse than Annelida but less diverse than Arthropoda. Arthropoda is the most diverse phylum among the four mentioned, with over 1.2 million known species. It contains a wide range of animals, including insects, crustaceans, arachnids, and millipedes. Arthropoda is the most diverse animal phylum known to man.
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A blastocyst is floating inside of Daria's uterus. In what stage is Daria's pregnancy?
The growing human organism is referred to as an embryo from the time it attaches to the uterine wall until the eighth week after pregnancy and as a fetus from the start of the ninth week following fertilization until delivery.
What pregnancy stage is the embryonic stage?Following conception, your child enters the embryonic stage, a time of significant change. It lasts from the fifth to the tenth week of pregnancy. The infant is referred to as an embryo during this period.
Describe the organogenesis stage.The development and organogenesis of tissues occur during weeks six through eight of the human embryo. Organogenesis, often known as the embryonic period, runs from weeks three to eight during which time this process takes place.
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Which of the following is an adaptation that enhances the uptake of water and minerals by roots? a. mycorrhizae b. pumping through plasmodesmata c. active uptake by vessel elements d. rhythmic contractions by cortical cells
Mycorrhizae is an adaptation that enhances the uptake of water and minerals by roots.
Mycorrhizae are the associations that exist between fungi and roots.
In around 90% of all terrestrial plants, these symbiotic relationships can be discovered.
A root-like structure and a network of mycelium that spreads into the soil outside of the tree roots make up the mycorrhizal fungi.
By taking in nutrients, this mycelium then transfers those nutrients back towards the host plant.
The absorption surface area of the root system grows as a result. The plant can get more moisture and nutrients because its mycorrhizae, or roots, are significantly larger. This is crucial for phosphorus uptake, which is one of the main nutrients that plants need.
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25 points help please
A litter of 6 kittens are born to the same parents. Some kittens have gray fur and some kittens have black fur.
Which statement about the kittens' genetic information is true?
Question 17 options:
They carry mutations in the gene for fur color
They all inherited identical genetic information from their parents
They have different alleles for fur color
Some kittens have more genes for fur color than others
Answer:
They have different alleles for fur color
Explanation:
In a chromosome the alleles are either dominant or recessive, The parents fur color will decide causing different fur colors.
4 Answer:
How would the average body temperature of a healthy human, which is
37 degrees C, be represented in Kelvins?
a. 0°K
b. 236°K
c. 310°K
d. 37°K
5 Answer:
Which of the following would require the greatest number of calories?
a. heating 1 g of water from 10°C to 80°C
b. heating 10 g of water from 10°C to 40°C
c. heating 100 g of water from 10°C to 20°C
d. heating 1000 g of water from 10°C to 12°C
6 Answer:
If a 10.0 g piece of metal required 100 cal to raise its temperature
by 20°C, what would you report as its specific heat?
a. 10 cal/g·°C
b. 200 cal/g·°C
c. 0.5 cal/g·°C
d. 2 cal/g·°C
7 Answer:
Which of the following does not happen during the phase change from
solid to liquid?
a. Heat is absorbed.
b. The temperature rises.
c. Melting occurs.
d. Molecules move faster.
8 Answer:
How much heat is needed to vaporize 100 g of water at 100 degrees C?
a. 54,000 cal
b. 100 cal
c. 80 cal
d. 800 cal
Answer:
4.) 310°K
5.)c.
6.)200 cal...
7.)b.
8.)54.000cal
how many years can mosquitoes lie dormant
Why are dATP, dCTP, dTTP and dGTP added to a PCR reaction tube?
They catalyze the polymerase.
They provide the building blocks of DNA.
They buffer the mixture.
They allow the DNA in the sample to anneal.
The dATP, dCTP, dTTP and dGTP are added to a PCR reaction tube because they provide the building blocks of DNA.
Members of the dNTPs include deoxyadenosine triphosphate (dATP), deoxythymidine triphosphate (dTTP), deoxycytidine triphosphate (dCTP), deoxyguanosine triphosphate (dGTP), and deoxyuridine triphosphate (dUTP). ) It is included.
Deoxynucleoside Triphosphates (dNTPs) dNTPs are composed of four basic nucleotides, dATP, dCTP, dGTP, and dTTP, as building blocks of new DNA strands. These four nucleotides are usually added to the reaction PCR reaction tube in equimolar amounts for optimal base incorporation. The main components of a PCR reaction are Taq polymerase, primers, template DNA, and nucleotides (DNA building blocks). The components are assembled in a tube along with the necessary cofactors for the enzyme and undergo repeated heating and cooling cycles to allow DNA synthesis.
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Where on the ocean floor will you find the greatest amount of living organisms?
Answer: The majority of marine organisms are found in coastal areas.
Explanation: As opposed to open ocean or deep water habitats. Coastal areas receive more sunlight and are usually warmer than open ocean or deep water habitats.
Answer:
coral reefs
Explanation:
because there are so many organisms living there
Complete the sentence. Lobbyists of ______________ use access to political leaders and other federal members to attempt to influence environmental policy.
the courts
Congress
interest groups
the presidency
Lobbyists of interest groups use access to political leaders and other federal members to attempt to influence environmental policy and is therefore denoted as option C.
What is Interest group?They are also referred to as advocacy group, or pressure group, and consists of any association of individuals or organizations that seeks to influence public policy on the basis of a particular common interest or concern.
They do that as a result of the access they have to political leaders and other federal members through various means such as affiliations etc. They do that so as to benefit from them through the various rule and laws passed by them as the political leaders are usually in charge of them due to them being placed in the different arms of government and is therefore the reason why it was chosen as the correct choice.
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If ouabain was used to block Na+–K+-ATPase pumps, A) the concentration of K+ would be equal on both sides of the membrane.
B) the cell would maintain steady state with a different membrane potential. C) the membrane potential would become more negative. D) Na+ would go to equilibrium across the cell membrane
If ouabain was used to block Na+–K+-ATPase pumps, the cell would maintain a steady state with different membrane potential. Here option B is the correct answer.
Ouabain is a drug that blocks the activity of the Na+–K+-ATPase pumps, which are responsible for pumping potassium ions (K+) into the cell and sodium ions (Na+) out of the cell.
By blocking these pumps, ouabain prevents the maintenance of the normal concentration gradient of K+ and Na+ across the cell membrane, and as a result, it alters the membrane potential. The membrane potential would not become more negative and the Na+ would not go to equilibrium across the cell membrane.
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From some observations, a student noticed there are fruit flies flying around and landing on a banana in the kitchen. The student wondered if a certain type of fruit will attract more fruit flies than another. The student set up four jars of the exact same size on the countertop in an area where the light remains the same. They weighed the following fruits and placed 110 grams of each fruit into the jars: banana, strawberry, peach, watermelon. The student had 4 vials of fruit flies (all female, same species, same number) and placed each vial directly in front of jar. The student asked a friend to take the cover off of two of the vials while they removed the other covers simultaneously. An hour later the student recorded the number of fruit flies in each jar and continued to record data every twelve hours for 5 days in a row. In this experiment, what is the independent variable?
Question 1 options:
The number of flies in each jar.
The different types of fruit.
The jars, countertop and species of fruit fly.
The time of day the experiment was set up.
Answer:
b
Explanation:
PLEASE HELP
Amino acids are the monomers of
proteins. What are proteins?
A. polymers
B. chemical reactions
C. muscles
Which of the following is a likely consequence of the thinning of the ozone layer?
a. Increase in lethal and nonlethal skin cancers.
b. Increase in the escape of heat from the Earth.
c. Global warming.
d. Elimination of flying insects.
Urban sprawl uses much land for housing.
between sprawling residential areas and downtown
economic areas require the use of automobiles, which
pollute the environment and increase traffic, People
who cannot afford automobile transportation are
disproportionately affected, as they are shut out from
either the economic areas or desirable living spaces
n the residential areas. Explain how this situation
5 unsustainable across all three dimensions of
ustainability.
Urban sprawl has been correlated with increased energy use, pollution, and traffic congestion and a decline in community distinctiveness and cohesiveness.
What is environment?Environment can be summed up as the effects of all the living and non-living things that have an impact on human life. Non-living or abiotic elements include water, land, sunlight, rocks, and air, whereas all living or biotic elements are animals, plants, forests, fisheries, and birds. All living and non-living things that occur naturally, or in this case, without the use of artificial means, are included in the natural environment or natural world. The phrase is most frequently used in reference to Earth or certain regions of it. The term "environment" refers to everything around us. It may include both biotic and abiotic (non-living) things. The external circumstances, resources, stimuli, etc. that an organism interacts with make up its environment.To learn more about abiotic refer to:
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HELP!!!! LIMITED TIME!!!!!!!!!!!!
Why is it helpful to study embryonic structures when determining
evolutionary relationships?
Select one:
A. All animals look the same as embryos.
B. All animals have completely different embryonic structures.
C. Embryos are not used to assign evolutionary relationships; only
adult organisms.
D. Animals with a shared ancestor may have similar characteristics as embryos that disappear as adults.
Answer:
D. Animals with a shared ancestor may have similar characteristics as embryos that disappear as adults.
Explanation:
Homologous structures are often seen in organism that share a common ancestor. Animals who share an ancestor tend to show these structures at their embryo stage even if they disappear later.
Like humans to fish to chicken and other animals show a tail during embryo even if it disappears later.
In eukaryotic cells, a terminator in mRNA synthesis is _____.
Hlnts stop codon particular nucleotide sequence in DNA, which tells the RNA polymerase to stop specific nucleotide sequence in mRNA to cease transcription, acts as a terminator in eukaryotic cells' mRNA synthesis.
Polymerase I transcribes ribosomal RNA, Polymerase II transcribes mRNA and miRNAs, and Polymerase III transcribes tRNA and other short RNAs in eukaryotes. Eukaryotes have three RNA polymerases, known as Polymerases I, II, and III. Although eukaryotic termination has not received as much attention as prokaryotic termination, the fundamental mechanisms are understood, and it has been noted that many eukaryotic RNA polymerase termination patterns exist. For instance, Polymerase III, like Rho-independent termination in prokaryotes, depends on a certain sequence and RNA secondary structure to cause transcript cleavage. Contrary to Polymerases I and II, which also call for the binding of termination factors, this is different.
Although both are termination factor dependent, Polymerases I and II employ different mechanisms to terminate transcription. Polymerase I uses a process similar to the prokaryotic Rho-dependent mechanism, whereas Polymerase II termination is more complex and involves two RNA polymerase-associated proteins, CPSF and CstF, which are responsible for recruiting the cleavage and polyadenylation enzymes, in a process that seems to couple termination with polyadenlyation.
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answer all of these questions for *80 POINTS**
Answer: the first one is C, the second one is A, the third one is also A
Explanation:
A line is a collection of
A line Is a collection of points
discuss differences between dicot and monocot plant in terms of external structure
The difference between dicot and monocot plants in terms of external structure are:
1. Leaf structure:
Dicot leaves have a network of veins and tend to be arranged in pairs opposite each other on the stem. Monocot leaves, on the other hand, have parallel veins and are usually arranged in sets of three or more.2. Flower structure:
Dicot flowers typically have four or five petals and sepals that are arranged in a spiral pattern.Monocot flowers usually have three petals and sepals that are arranged in a symmetrical pattern.3. Root structure:
Dicot plants tend to have a taproot system, which is a single main root that branches off into smaller roots. Monocot plants typically have a fibrous root system, which is a network of many thin roots that branch off from the base of the plant.4. The number of cotyledons:
Dicots typically have two cotyledons, or embryonic leaves, in the seed.Monocots typically have one cotyledon in the seed.5. Stem structure:
Dicots have a ring of vascular bundles that surrounds the stem.Monocots have scattered vascular bundles throughout the stem.To learn more about dicots and monocots:
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How does the circulatory system help the muscles to function
Answer:
The circulatory system helps the muscular system by pumping blood and oxygen to the working muscles. The circulatory system also helps the muscular system because it allows muscles to receive the oxygen they need to function properly.
Explanation:
What does Carson mean when she writes, "This town does not actually exist, but it might easily have a thousand
counterparts in America or elsewhere in the world"?
O None of these choices are correct.
O The town she wrote about was fictional, but it was based on real situations that had occurred.
O The town she wrote about was not in America.
O The town she wrote about no longer existed, because everyone was poisoned.
Carson asserts that "this village may easily have such a thousand counterparts in America and around the world" despite not actually existing. Carson was a significant player in the environmental movement of the 1960s.
What is Carson famous for?
Tahoe is well known as an industrial centre with exceptional access to transportation and the Pacific Rim, but it is also a diverse town that really is popular as a place to both live and work.
Carson warns us about this, but why?
Pesticides as DDT—dichloride diphenyl trichloroethane—were being used excessively and indiscriminately to control crop pests, Carson warned. Poisons entered streams after moving up the food chain, putting at risk the delicate ecosystems that feed fish, birds, and eventually humans.
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Question 8(Multiple Choice Worth 3 points)
(04.01 MC)
Starting with the European settlers, humans have introduced earthworms from Europe and Asia into North American forests. These introductions continue through the transport of soil that contains non-native earthworms, such as during construction and through the release of non-native earthworms used for fishing. The effects of non-native earthworms are especially large in forests that did not have any native earthworms. For example, forests of the Great Lakes region did not previously have earthworms until humans introduced them. When non-native earthworms are introduced, the thick layer of leaves, known as leaf litter, covering the ground disappears quickly, thereby altering biogeochemical cycles.
What is a possible negative consequence of introducing the non-native earthworms to forests in the Great Lake regions?
PLease hurry
The earthworms reduce the resources available to other animals that eat dead plant matter.
The earthworm decreases the energy flow from one tropic level to the next.
The earthworms provide an additional food source for primary consumers.
The earthworms burrow, which reduces the nutrients, flow of air, and water underground.
Answer:
The earthworms reduce the resources available to other animals that eat dead plant matter.
Explanation:
The introduction of non-native earthworms in the Great Lakes region can have negative consequences on the ecosystem, including reducing the leaf litter and other organic matter in the soil, which is a main food resource for many species of animals and invertebrates, causing a decline in the population of those species. I apologize for any confusion my previous response may have caused.
is there an impact on the environment if blue whales went extinct? Who or what would it impact? Helllpppp please
Answer: Phytoplankton and the single-celled variety that krill eat are responsible for absorbing a massive amount of carbon from the atmosphere. In the absence of whales, krill would likely eat much of the free-floating phytoplankton on the ocean's surface, resulting in a marked acceleration in climate change.
Explanation:
Humans selectively fish out the largest species from Earth's oceans, causing their populations to dwindle. If that weren't alarming enough, the extinction of those animals—think a great white shark, bluefin tuna, and blue whale—could ripple down the food chain and spell extinction for entire ecosystems.
Answer:
algae population.
Explanation:
this would affect other aquatic life because algae absorbes oxygen and may cause fish to die of lack of food and oxygen
Question 24 Which of the following is NOT a reagent typically used in modern PCR? O Template DNA O Taq polymerase
O DNA polymerase from E. coli
O Primers O Nucleotides
Nucleotides is NOT a reagent typically used in modern PCR.
Nucleotides are the building blocks of DNA and RNA. They have genetic material in them. As coenzymes, nucleotides are necessary for enzymes to catalyse various biological processes. Energy is kept in our bodies as ATP.
All living creatures use nucleosides to encode, transfer, and express their genetic information. DNA and RNA's building blocks, nucleotides, are nucleic acids. A nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and at least one phosphate group make up a nucleotide.
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The molecule on which an enzyme acts is called
The molecule on which an enzyme act is called a substrate.
What are enzymes?Enzymes are molecules found in the body that speed up the rate of chemical reactions.
Proteins called enzymes operate as biological catalysts by quickening chemical reactions.
Substrates are the molecules that enzymes can interact with, and the enzyme changes the substrates into new molecules known as products.
Enzymes can be classified into the following categories based on the type of reaction they catalyze:
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The element boron has
[how many valence electrons.
Answer:
3
Explanation:
When counting valence electrons you only look at the columns from 1-2 and 13-18
Notice how when counting, there are 8 columns, with the Noble gases being on the very right with a full shell of 8 valence electrons. Hence when counting from left to right, add a VE for every column (skip the transition metals)
For a molecule of glucose to be converted into an amino acid, which of these events must occur?
A. Anitrogen atom must be added to a carbon chain.
B. A phosphorus atom must be removed from a carbon chain.
C. A hydrogen atom must be added to a carbon chain.
D. Two carbon atoms must be joined together.
Answer:
. An nitrogen atom must be added to a carbon chain.