While conducting experiments with E. coli, Meselson and Stahl established that during DNA replication, each of the two strands that compose the double helix were used as a template for the new strands of DNA. The scientists described the replication method as semi-conservative. Explain what this means in terms of DNA replication.
A) The two original DNA strands, the parental strands, woulde-be used as templates to synthesize new strands.
B) After base pairing, both copies of the new DNA molecules would be a mix of alternating segments of old and new DNA.
C) Base pairing would result in two double-stranded DNA molecules that would include one parental or old strand and one daughter or new strand.
D) The two newly-synthesized strands, the daughter strands, would basepair with each other; one to form one all-old strand and one all-new strand.
Answer:
the answer is not D its C
Explanation:
All BUT one is an example of a invasive species. That is
Answer:
Notable examples of invasive plant species include the kudzu vine, Andean pampas grass, and yellow starthistle. Animal examples include the New Zealand mud snail, feral pigs, European rabbits, grey squirrels, domestic cats, carp and ferrets.
Hope I'm right! : )
Answer:
C) tomato plants brought into a garden and given the opportunity to grow and thrive without any harm to any other plant species.
Explanation:
The one that is not an invasive species would be that tomato plants brought into a garden and given the opportunity to grow and thrive without any harm to any other plant species. In order to be invasive, a species must be introduced,have no natural predators or competitors, reproduce rapidly, and cause a problem to the native species. All of these are example of species that have been introduced and have led to environmental problems except the example with tomatoes.
What pattern is described by the theory of punctuated equilibrium? Punctuated equilibrium
Answ
paces of species
Explanation:
The theory of punctuated equilibrium in evolutionary biology posits that long periods of stability in species are interspersed with brief phases of rapid evolutionary change. This concept, proposed by Eldredge and Gould, contrasts with gradualism, which argues for steady evolutionary change over time.
Understanding Punctuated Equilibrium
The theory of punctuated equilibrium describes a pattern in the evolutionary process. According to this theory, the evolution of species is marked by long periods of relative stability or stasis, interrupted by short, but significant phases of rapid evolutionary change. This model contrasts with gradualism, which suggests that evolutionary change occurs slowly and steadily over time. The concept of punctuated equilibrium was first proposed by paleontologists Niles Eldredge and Stephen Jay Gould in 1972.
Drawing from fossil records, this model observes that species often remain unchanged for extended intervals—a phenomenon known as stasis. Evolutionary transformations appear more abrupt in geological terms, happening over thousands or maybe a few million years, which still seems sudden compared to the lifespan of most species. This rapid change is usually associated with speciation events, where new species are formed.
Therefore, punctuated equilibrium is a model of the timing of evolution, highlighting how long periods of little evolutionary change are punctuated by bursts of rapid evolutionary change. It's important to note that these periods of rapid change are not instantaneous but are rapid in comparison to the long periods of stasis that precede them.
Which rock layer in figures 1 and 2 are about 500-600 million years old?
Answer: layers F and L
Explanation:
They are the lowest the younger layers are at the top.
What is the citric acid cycle input
Answer:
(Inputs) 2 Acetyl CoA + 6 NAD+ + 2 FAD + 2 ADP + 2 Pi + 4H2O --> (Outputs) 4 CO2+ 6 NADH + 6 H++ 2 FADH2+ 2 ATP + 2 CoA
Explanation:
Answer: acetyl-CoA is the main one
Explanation:
How do rivers erode Earth's surface?
A. Rivers experience extreme temperature changes, causing rocks to contract and crack.
B. Rivers do not cause any changes to surface rock or underwater rocks as they move over them.
C. Rivers remove plants from their bottoms and deposit them downstream, leaving rocks
unaffected.
D. Rivers break small pieces of rock from their sides and bottom and deposit them downstream.
10. The
system Includes the brain.
endocrine
nervous
circulatory
Answer:
nervous
Explanation:
The human brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system.
Answer:
B. nervous
Explanation:
what is the difference between milk and buttermilk?
Answer: The answer is, Therefore, the main difference between milk and buttermilk is that the first one is the natural product that is obtained from the mammary glands of female beings whereas buttermilk is the name for milk from whom all the butter and cream removed so that the liquid that is left behind can last for a long time
Explanation:
Answer: The deffrence is one has butter in the milk
Explanation:
Hope it helps
HELP SCIENCE!!! I will give brainliest! for the best answer
Explain the relationship between producers, consumers, and decomposers in the process of energy transfer in a food web
Answer: A producer is like grass, then consumers like a zebra will eat the grass, and wen the zebra dies its body breaks down and helps more grass grow. That cycle keeps going over and over, it never ends.
Explanation: producer: organisms that make their own food
consumers: organisms that will eat the producers to gain energy
decomposer: organisms that decomposes organic matter such as fungi
How does a DNA molecule determine which proteins are produced by a cell?
Answer: The order of nitrogen bases along a gene forms a genetic code that specifies what type of protein will be produced.
Explanation:
A fly has two alleles for the color of its eyes. The green allele is recessive, and
is represented by q. The blue allele is dominant, and is represented by p. If 29
of 100 organisms are green, what is q?
Homozygous dominant + Heterozygous + Homozygous recessive = 1
p+ 2pq + q^2 = 1
A. 0.71
B. 0.46
C. 0.29
D. 0.54
The equations of the Hardy-Weinberg equilibrium are useful to get allelic and genotypic frequencies. In the example q = 0.538 ≅ 0.54 . Option D. 0.54
What is the Hardy-Weinberg Equilibrium?
The Hardy-Weinberg equilibrium theory states that allelic and genotypic frequencies remain the same through generations in a population that is in equilibrium.
Assuming a diallelic gene,
The allelic frequencies in a locus are represented as
The frequency of the dominant allele f(X) is pThe frequency of the recessive allele f(x) is qThe genotypic frequencies after one generation are
p² (H0m0zyg0us dominant genotypic frequency), 2pq (Heter0zyg0us genotypic frequency), q² (H0m0zyg0us recessive genotypic frequency).The addition of the allelic frequencies equals 1
p + q = 1.
The sum of genotypic frequencies equals 1
p² + 2pq + q² = 1
In the exposed example, the gene coding for eye color is diallelic.
B is dominant and codes for blueb is recessive and codes for greenN = 100 individuals
Green eyed individuals = 29
Blue eyed individuals = 71
The frequency of green eyed individuals is 29/100 = 0.29 ⇒ q²The frequency of blue eyed individuals is 71/100 = 0.71 ⇒ p² + 2pqIf q² = 0.29, then
q = √0.29
q = 0.538
If q = 0.538, then the value of p can be calculated by clearing the following equation
p + q = 1
p + 0.538 = 1
p = 1 - 0.538
p = 0.462
We can use the p value to calculate p²
If p = 0.462, then
p² = 0.462²
p² = 0.2134
And the frequency of the heter0zyg0us genotype is
2pq = 2 x 0.462 x 0.538
2pq = 0.497
p² + 2pq + q² = 1
0.213 + 0.497 + 0.29 = 1
The frequency of the recessive allele is q = 0.538.
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Atomic radius blank as the atomic number increases across the period.
Answer:
The atomic radius of atoms generally decreases from left to right across a period. ... Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level. These electrons are gradually pulled closer to the nucleus because of its increased positive charge
Explanation:
hope this helped
Read the following scenarios and answer the question in each one.
15. A 17-year-old linebacker for the high school football team had a helmet-to-helmet collision with the running back
from the opposing team. The linebacker was assisted off the field and evaluated by the trainer, who
recommended that he be evaluated in the emergency room. The MRI in the emergency room showed bruising of
the cerebral tissue. What is the diagnosis for this patient?
The diagnosis for this patient in the given scenario is - Cerebral contusion
Cerebral contusion
It is a form of traumatic brain injury in which found bruises of the brain tissue like in this case MRI showed bruising of the cerebral tissue. In this case, the collision of both players leads to cerebral contusion.
A cerebral contusion can lead to microhemorrhages, small blood vessel leaks into brain tissue. A cerebral contusion occurs due to severe head injuries. This could result in a fatal condition.
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The linebacker's diagnosis is likely a concussion, a common form of traumatic brain injury in contact sports like football.
Explanation:The diagnosis for the 17-year-old linebacker who experienced a helmet-to-helmet collision and showed bruising of the cerebral tissue on an MRI is most likely a concussion. This is considered the mildest and most common type of traumatic brain injury (TBI) and can cause symptoms like headache, drowsiness, and confusion. Football is a contact sport where the risk of concussions is significant despite the use of helmets.
Which of the following is a non renewable resource?
A.hydropower
B.Solar
C.Petroleum
D.Biomass
Answer:petroleum
Explanation: Others can be renewed
help plzzzzzzzzzz. could a genetically engineered organism hybridize with a wild animal or plant? why or why not?
40 POINTS!!!!!!!
You have been given charge of 40 adult wild wolves. This pack of wolves includes 20 males and 20 females.
Your assignment is to create offspring from these wild wolves that are tame enough for humans to have as indoor pets.
Answer the following questions each in a separate paragraph: When writing the explanations be sure to provide at least a paragraph on each to answer each question.
A) Explain to step by step how you would go about this task
B) Explain what sort of time frame you think this project will take and why.
C) Explain why this scenario is both similar and different from how dogs evolved
D) Explain why this scenario is both similar and different from how house cats evolved
is c I think, I'm not sure tho!
Answer:
a) First I would separate the males and females. Make sure that they have the ability to create offspring. See how each male and female react to each other. Make sure that they can stand being next to each other without fighting.
b) I think I would be able to do this within two months. I say within two months because trust takes time to build and animals comfortably level next to each other also takes time to build. They should be able to stay a whole night in the same area without fighting.
c) Wolves and dogs are similar in this case because its up to the female when she is ready to mate with the male. And sometimes the female might not want offspring with a certain male of the group but with a different one. It's also different because with wolves, they want to eat you. With dogs, trust can grow to the point of rolling in the mud together and tolerate you and other humans.
d) Cats are unpredictable. You can cuddle one moment and it scratch you the next out of nowhere. It probably did give off signs of it not wanting to be in the mood that you missed. And female cats might have the same problem of wanting to choose it mate. And they are not similar to a wolf or dog. Dogs and wolves howl and cat meow.
Hope I helped, this was fun to type ^-^
The first choice on a dichotomous key is:
"1A. Are wings covered by an exoskeleton?
vs. 1B. Are wings not covered by an
exoskeleton?" Which organism is separated
from the others by this question? SC.6.L.15.1
help asapp!! dis is a quizz
Answer:
1A- Wings are covered by an exoskeletan. 1B- Ladybug.
Explanation:
I am in 6th grade, so I'm not completely sure if this is correct...
a student builds an model of her bedroom. the scale is 1:25 in the scale model, the students bed is 3 inches long how long is her actual bed ?
The size of actual bed is 75 inches
Explanation:
Scale refers to the ratio of the original dimension to the dimension on paper (miniaturised dimension). Since it is a ratio, it has no dimension.
Scale= original dimension/miniaturised dimension
Given that scale is 1:25
It means that every 1 inch on paper would correspond to 25 inches in reality.
The length of the model bed= 3 inches
Hence, the length of the original bed is 25*3 = 75 inches
∴ Length of the actual bed of the student is 75 inches.
By definition of scale, the length of the actual bed of the student is 75 inches.
In first place, you have to know that the scale is the relationship that exists between the magnitudes of a drawing and the actual dimensions.
That is, the scale is defined by two numbers that determine the relationship between the drawing and reality.
The first number of the proportion or relationship refers to the drawing on paper, while the second number of the proportion refers to the reality of the object (actual dimensions). This is, Scale = Drawing: Reality or [tex]scale=\frac{drawing}{scale}[/tex]
The scales can be:
Reduction scale: used when the size of the object is larger than the size of the sheet of paper. Magnification scale: used to represent small objects. Natural scale: it is used to represent objects with a drawing the same size as reality.In this case, you know that:
Scale= 1:25Drawing= 3 inchesReality= ?Replacing in the definition of scale:
1:25= 3 inches: reality
or
[tex]\frac{1}{25} =\frac{3 inches}{reality}[/tex]
Solving:
reality= 3 inches× 25
reality= 75 inches
In summary, the length of the actual bed of the student is 75 inches.
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Marina has three dogs. She should check them regularly for ticks to avoid contracting:
A) Dysentery
B) Yellow fever
C) Rocky Mountain spotted fever
D) Scarlet fever
Answer:
Rocky Mountain spotted fever
Explanation:
Marina should regularly check her dogs for ticks to prevent contracting Rocky Mountain spotted fever, a disease caused by Rickettsia rickettsii and transmitted by ticks like the American dog tick.
Marina has three dogs and should check them regularly for ticks to avoid contracting Rocky Mountain spotted fever (RMSF). RMSF is a potentially fatal, tickborne disease caused by the bacterium Rickettsia rickettsii. This disease is mainly transmitted through the bite of hard-bodied ticks such as the American dog tick (Dermacentor variabilis), Rocky Mountain wood tick (D. andersoni), or brown dog tick (Rhipicephalus sanguineus). Among the diseases listed: Dysentery, Yellow fever, Rocky Mountain spotted fever, and Scarlet fever, only Rocky Mountain spotted fever is transmitted by ticks. Regularly checking her dogs for ticks and removing any ticks found can help prevent the spread of this disease.
What type of molecule was likely broken down during this treatment that caused the cell organelles
to be dispersed?
A. Cellulose
B. Phospholipid bilayer
C. Actin filaments
D. Nuclear pores
E. Starch
Answer: B Phospholipid bilayer
Explanation:
If the lipid bilayer is broken, the internal organelles and the cytoplasm of the cell are dispersed, since this layer makes up the cell membrane, cellulose is part of the structure of the wall of plant cells, so the response A does not is correct, answer C is false because actin filaments participate in the contraction of muscle fiber and not membrane, answer D is incorrect because nuclear pores have as a function the passage of substances to the nucleus and the response E is incorrect because the starch is a carbohydrate, which has plants in reserve to be consumed.
Wyatt and Darnell are designing an experiment to study water mold reproduction. Water mold is an example of a protist that reproduces both sexually and asexually in a process called alternation of generations. Look at the diagram of the water mold life cycle. At which point is genetic information combined?
In water molds, and other protists exhibiting alternation of generations, genetic information is combined during sexual reproduction, specifically when haploid gametes fuse to form a diploid zygote. Binary fission, multiple fission, and budding represent asexual reproduction where no genetic information is combined.
Protists exhibit diverse reproductive strategies, including both asexual and sexual reproduction. Asexual reproduction in protists can occur through binary fission, multiple fission, or budding, which results in offspring that are genetically identical to the parent. On the other hand, sexual reproduction involves the combination of genetic material from two parents to produce offspring with genetic variation.
In the context of the water mold's life cycle, genetic information is combined during the process of syngamy, where two haploid cells, typically in the form of spores or gametes, fuse to form a diploid zygote. This diploid stage undergoes meiosis to generate new haploid cells that can either grow into new organisms or, under stressful conditions, form cysts that are resistant to harsh environmental factors.
The water mold Saprolegnia is a coenocytic organism that is predominantly diploid. The fusion of a sperm from the antheridium with an egg from the oogonium results in the combination of genetic information, leading to the formation of a diploid zygote. Afterward, this zygote undergoes meiosis and returns to a haploid state, completing the cycle of alternation of generations.
complete questions
Wyatt and Darnell are designing an experiment to study water mold reproduction. Water mold is an example of a protist that reproduces both sexually and asexually in a process called alternation of generations. Look at the diagram of the water mold life cycle. At which point is genetic information combined?
Where in the state of Indiana would you expect to experience earthquakes as a result of the Wabash Valley Fault System?
Central
southwest comer
northeast comer
southern half of the state
If a man is heterozygous (Aa) for a trait, predict his possible sperm
Answer:i know that the first one is the southwest corner
Explanation:
c. a snickers bar has 29 grams of fat.
2. An example of qualitative data is:
a. a snickers bar has chocolate, peanuts, and
caramel in it.
b. a snickers bar weighs 4 ounces.
d. a snickers bar is 180 calories.
In pea plants, red flowers and round pollen are known to be recessive traits. In a dihybrid cross experiment, lots of plants with red flowers and round pollen are found in the F2 generation. How is this possible?
The genes for flower color and pollen shape are found on different chromosomes.
Multiple genes control the traits for flower color and pollen shape.
The genes for flower color are linked to pea shape, but not pollen shape.
The genes for flower color and pollen shape are linked.
Answer:
The last one if there are multiple answers please tell me.
Explanation:
just when with the one i knew in heart
The reappearance of recessive traits (red flowers and round pollen) in the F2 generation of a dihybrid cross is explained by Mendel's Law of Independent Assortment, which states that genes on different chromosomes assort independently during gamete formation. When members of the F1 generation cross-pollinate, recombination of alleles can result in the re-expression of the recessive traits in the F2 generation.
Explanation:Your observation of red flowers and round pollen in the F2 generation of a dihybrid cross in pea plants is possible because these traits are on different chromosomes. If two genes are located on separate chromosomes, they will assort independently during gamete formation. In a dihybrid cross involving two traits, the different combinations of alleles may result in the re-expresssion of recessive traits in the F2 generation. This is known Mendel's Law of Independent Assortment.
To illustrate, consider that a parental generation plant with dominant alleles for both traits (i.e., purple flowers and elongated pollen) is crossed with a plant having recessive alleles (i.e., red flowers and round pollen). In this case, the F1 generation will all exhibit the dominant traits because dominance masks the effect of recessive alleles. However, when the F1 generation cross-pollinates, the F2 offspring can include plants with the recessive traits due to recombination of alleles.
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why should/shouldn't Pluto be reclassified as a planet?
Answer:
(This could be opinion based, but ok.)
Explanation:
should:Pluto was known as a planet for 75 years. This means that most people already knew it as a planet, and would be extremely confused. All of the books about planets would be inaccurate and changed. Not all people can access brand new books, leading to inaccurate information.
shouldn't: The same reason that it was unclassified as a planet. It does not adhere to all of the rules of being a planet. It is not completely round and does not have a round orbit around the sun. Pluto does not have every requirement to be a real planet, and therefor, it would be incorrect to have it classified wrongly.
A species of fly lacks wings. How would biologists explain how a species of fly without wings evolved from an ancestral fly species with wings ?
Answer:The species of fly did not need the wings because of its specific environment.The species of fly did not need the wings because of its specific environment.
Explanation: The species of fly did not need the wings because of its specific environment.
The species of fly did not need the wings because of its specific environment.
Biologists can explain how a species of fly without wings evolved from an ancestral fly species with wings through environmental adaptedness.
Environmental change is any change in an ecosystem or environment that warrens adaptability from the inhabiting organisms in order to survive. The ability to adapt to these changes is known as environmental adaptedness. This is a form of evolution in which an organism will generate or loose characteristics in response to changes in its way of life.
Biologist can explain how a species of fly without wings evolved from an ancestral fly species with wings through environmental adaptedness because the presence of unnecessary wings would have caused the expenditure of energy with no benefit to the fly, therefore, the offspring of a fly who lives in an environment which has no need for the ability to fly will gradually loose their wings in order to retain more energy and function more efficiently. This is evolution through environmental adaptedness.
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All of the following are characteristics of modern amphibians except:
Separate sexes
Smooth moist skin
oooo
Endothermic
Bony skeleton
Answer:
Endothermic
Explanation:
Amphibians are ectothermic organisms. Ectothermic animals are coldblooded animals. From the options above, the correct answer is endothermic because amphibians are not hot blooded and are never endothermic.
What type of energy occurs when a sock is stuck to a blanket when it is taken out of the dryer?
Answer:
static electricity
Explanation:
Static electricity is the buildup of electrical charge in an object. Sometimes static electricity can suddenly discharge, such as when a bolt of lightning flashes through the sky. Other times, static electricity can cause objects to cling to one another. Think of how socks fresh out of the dryer stick together
Which scientist and atomic model are correctly matched?
Answer:
The answer is Rutherford inferred the existence of a dense, positively charged nucleus.
Explanation:
Answer:
Rutherford inferred the existence of a dense, positively charged nucleus based on results of a scattering experiment. Bohr confirmed the existence of protons in the nucleus.
Explanation:
Hope This Helps!!!
Add your results to those of your partner to produce a total of 20 tosses. Assuming that you expect ten heads and ten tails in 20 tosses, how close are these results to what was expected?
Answer:
the results are 3 away from being a 50/50 which are expected results
Explanation:
i flipped a coin 20 times and it landed on heads 13 times and tails 7 times