How did the results of Meselson and Stahl's experiment confirm that
DNA replication is semi-conservative? Describe the results in terms of
how replication occurs.
Answer: Meselson & Stahl reasoned that these experiments showed that DNA replication was semi-conservative: the DNA strands separate and each makes a copy of itself, so that each daughter molecule comprises one "old" and one "new" strand. The semi-conservative model, in which each strand of DNA serves as a template to make a new, complementary strand, seemed most likely based on DNA's structure. ... From the patterns of DNA labeling they saw, Meselson and Stahl confirmed that DNA is replicated semi-conservatively.
Explanation:
based on the fossil evidence the correct sequence in which life evolves in PLEASSE HELPPP THIS IS A BIG GRADE
Answer: Fossil evidence that shows the correct sequence in which life evolves is B i think im not sure but im pretty sure its B
Help me please
These coal-powered factories had caused huge damage to the environment. As a result, the government enacted anti-pollution laws to preserve and protect the environment. Predict what would happen to the white-colored moth population when the environment is restored?
Answer:
it would drastically increase
Explanation:
Studies have shown that the increased amount of pollution has led to a drastic decline in the number of white-colored moths. Therefore, if pollution decreased and the environment was restored, then white-colored moths would once again thrive and their population would drastically increase. This is because, with less pollution, the white-colored moths are much harder for predators to see and are able to blend in easier with their surroundings. This therefore, allows them to survive long enough to reproduce.
:))))))))))) I would appreciate the help
Define the following
Organism:
Population:
Community:
Ecosystem:
Biome:
Biosphere:
Answer:
Population: a group of an individual species
Community: a group of multiple species
Organism: A living thing
Ecosystem: ecosystems include more than a community of living organisms (biotic) interacting with the environment (abiotic)
Biome: a set of ecosystems sharing similar characteristics with their abiotic factors adapted to their environments.
Biosphere: the sum of all the ecosystems established on planet Earth. It is the living (and decaying) component of the earth system.
Explanation:
The definition of the given terms are as follows:
Organism: They may be defined as a living thing that has an organized structure and the ability to react to stimuli, reproduce, grow, adapt, and regulate the mechanism of homeostasis.Population: It may be defined as the group of individuals belonging to the same species living in the same area at a given time. What is Community?A community may be characterized as a group of individuals belonging to different species living in the same area at a given time.
An ecosystem may be defined as the place or an area where members of different species live together and interact with one another for the purpose of food, shelter, space, and mating partner.
A biome may be characterized as a very large ecosystem that is significantly running in nature in an unmanaged area. While the biosphere may be defined as the region of the Earth where life can be found, including the soil, water, and air.
Therefore, the definition of each term is well described above.
To learn more about Ecosystem, refer to the link:
https://brainly.com/question/842527
#SPJ2
why do animals respond faster than plants?
[tex]\huge{\mathbb{\tt { QUESTION:}}}[/tex]
Why do animals respond faster than plants?
[tex]\huge{\mathbb{\tt { ANSWER:}}}[/tex]
When compared plants and animals, the animals responds to the stimuli more faster as compared to the plants due to the presence of nerve cells. ... Whereas when talk about plants there are no nerve cells in the plant body so they cannot respond to the outer stimuli so quickly.#CarryOnLearning
#JustDoYourBest
→ X x K i m 0 2 x XDuring which process does heat transfer occur because of density differences in water or air?
A. Conduction
B. Pollution
C. Radiation
D. Convection
2. Explain your answer.
Answer: D. Convection
Explanation: As water's temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes denser and sinks.
Answer:
The correct answer is D. Convection.
Explanation:
Convection occurs due to the differences in density, and only happens in gases or liquids. The heat is transferred by the movement of a heated fluid, which is air or water.
Hope this helps! :)
Why do silent mutations not affect the protein that the gene encodes?
Answer: Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene's protein. ... And when the amino acids of a protein stay the same, researchers believed, so do its structure and function.
A team of students from UGA are completing and field study to determine the impact the American alligator has on ecosystems in places such as the Okefenokee Swamp in South Georgia over a 3-month period. In one area, they have removed the alligators and in another area they have left the alligators. Which of the following represents the independent and dependent variables being tested in the field study as well as a claim of the predicted outcome?
Answer:
Alligators is independent variable and the impact on ecosystem is dependent variable.
Explanation:
Alligators is independent variable and the impact on ecosystem is dependent variable. The environment having alligators is a balance ecosystem because alligators feeds on some organisms to control their population while on the other hand, the environment which have no alligator is not in equilibrium state because some organisms increase in population and become invasive species that cause damage to other organisms so environment having alligators is good as compared to no alligators.
Why are bryophytes considered the primary source of water
Sea breeze happens during the day.
A. True
B. False
Answer:
True, in the summer its common
Explanation:
Answer:a true
Explanation:The statement is true.
The specific heat capacity of water is much higher than that of sand. Air above land becomes more warmer than water during day. So cold air above water or sea blows to land known as sea breeze and vice versa for land breeze.
Which graph is an exponential growth model?
A.
B.
C.
Answer:
The answer is A,
Explanation:
Just took the test.
Sugar gliders and Northern flying squirrels are mammals that have many morphological similarities despite being genetically different.
a. True
b. False
The teacher noticed that Carrie seemed quite restless today and was having difficulty concentrating on any task that she started. She continuously squirmed, whether in her chair or sitting on the floor. On a number of occasions, the teacher also observed Carrie tugging at her underwear and scratching her bottom. She recalled that Carrie’s mother had mentioned something about getting her younger brother tested for pinworms and wondered if this might be what she was observing.
Required:
If Carrie does have pinworms, for what length of time should the other children be observed for similar problems?
Answer: Other children should be observed after the average of 6 weeks from the time of exposure to Carrie who is suspected to be infected by Pin worm.
Explanation:
Pin worm also called enterobiasis vermicularis is a parasitic nematode. The eggs are found in the specimen collected from the perianal skin and in the faeces of an infected individual. In its worldwide distribution, children are more commonly infected than adults. This is so because autoinfection by swallowing infective eggs is common in children. The eggs cause intense irritation and scratching of the infected area leads to the fingers becoming contaminated with eggs. This was observed by Carrie's teacher, as she usually scratch her bottom.
Other children should be observed after the average of 6 weeks from the time of exposure to infective eggs. This is because of the direct life cycle exhibited by the worm. Following ingestion of infective eggs, the larvae hatch in the intestine. Occasionally larvae hatch from the eggs on the perianal skin and migrate back into the intestine where they grow into mature worms. This type of infection is called RETROINFECTION. The larvae develop into fully mature worms in the large intestine. The female worms migrate to the rectum, pass out of the anus and lay their eggs on the perianal skin and perineum. The eggs are produced about 6 weeks after infection. They can remain viable on bedding, clothing, household objects, and in dust for several weeks.
Therefore from the life cycle of the worm, similar problem found in Carrie can be observed in other children after about six weeks of exposure to the infective eggs of the worm.
Tom has compared three skin creams and found that only one causes a rash. Tom is in the
stage of the scientific method.
O experimenting
O hypothesizing
O predicting
O evaluating
Which form of weathering most likely caused the reddish coloring of the
rocks in the photo?
A Abrasion
B. Oxidation
c. Exfoliation
D. Carbonation
Answer:
According to my sources the answer is B
Explanation:
olease check these answer before submitting it <3
Answer:
B: Oxidation causes the reddish coloring
Each chromosome has genes that control wing shape, body color, antenna type, and eye color.
a. True
b. False
Answer:
The correct answer is - True.
Explanation:
In a simplified drosophila or fruit fly genome, Each chromosome of the homologous pair of chromosomes has the genes for the body color, wing shape, antenna type, and eye color, and all are located on the same chromosome.
So on the basis of the explanation given above it is clear that in Drosophila or fruit flies it is true that Each chromosome has genes that control wing shape, body-color, antenna type, and eye color.
Why is the taiga (boreal forest) considered "the driest moist biome" ?
Because it rains as little as the temperate rain forest, but retains most of its water throughout the year because of the cool temperatures.
Because it rains more than a tropical rainforest, but retains most of its water throughout the year because of the cool temperatures.
Because it rains as little as a desert, but retains most of its water throughout the year because of the cool temperatures.
Because it rains less than a desert, but retains most of its water throughout the year because of the cool temperatures.
C
Explanation:
i think its C sweethart btw how u been?
Taiga is considered as the driest moist biome because, it rains as little as the temperate rain forest, but retains most of its water throughout the year because of the cool temperatures.
What is taiga forest?In North America, Taiga is generally referred to as boreal forest or snow forest. This is world's largest biome, consist of cone bearing seed plants, mostly, of pines, spruces, and larches.
It covers most of inland Canada, Alaska, and parts of the northern contiguous United States in North America. In Eurasia, it covers most of Sweden, Finland, Russia from Karelia in the west to the Pacific Ocean, Norway and Estonia, some Scottish Highlands.
Throughout the year, taiga experience relatively low precipitation. Primarily it rains during summer, but can also be snow or fog. Due to low evaporation rate, it is sufficient for vegetation growth.
Learn more about Taiga forest, here:
https://brainly.com/question/7131637
#SPJ3
WILL NAME BRAINLYIST PLEASE HURRY
What are the three states of matter? What do the particles look like in each?
Answer:
Solid: Compact particles; no movement
Liquid: Particles can move but in a limited space
Gas: Rapid moving particles that move almost freely
Explanation:
Answer:
solid & liquid & gas
Explanation:
solid = hard
liquid = water
gas = air
The stages of mitosis were originally defined by cellular features observable through a light microscope.
a. True
b. False
Answer: TRUE
Explanation:
The cell division that takes place during the growth and development of an organism is in an as MITOSIS. Mitosis takes place in somatic cells that is, body cells that are not involved in the production of gametes. The difference stages of mitosis were originally defined by cellular features observable through a LIGHT MICROSCOPE. These stages includes:
--> PROPHASE: when viewed under a light microscope, each chromosome shortens and thickens and is seen to consist of two chromatids. The Centriole begin to separate.
--> METAPHASE: The nuclear membrane disappears, a spindle forms, the chromosomes line up across the middle of the cell and become attached to the spindle fibres at their centromeres.
--> ANAPHASE: The sister chromatids are pulled apart to opposite ends of cell as the spindle fibres contract.
--> TELOPHASE: A nuclear membrane forms around each set of chromatids, and the cell divides into two daughter cells.
PLS HELP WILLING TO GIVE BRAINLIEST
Answer:
1. In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area previously occupied by living things is disturbed then recolonized following the disturbance.
2. Primary and secondary succession occur after both human and natural events that cause drastic change in the makeup of an area.
3. Volcanic eruptions, Retreat of glaciers, Flooding accompanied by severe soil erosion, Landslides, Nuclear explosions, Oil spills.
A water wave has a speed of 5 m/s. If it's wavelength is 50 m, what is its wave period? Show your work
Answer:
v=5,f=?,π=50 ,5÷50=0.1hz,T=10
how is carbon captured and stored by organisms? how is carbon passed through the ecosystem? how is carbon returned to the ecosystem?
Explanation:
i dont.know im in that qt
What comes to mind when you hear the term “9 + 2?
my mind is blank totally blank
What do animals do with the carbon dioxide produced in their cells during cellular respiration?a.store it for later useb.reuse it during photosynthesisc.exhale it in the breathing processd.combine it with water to make sugar
Answer:
below
Explanation:
I'm pretty sure the answer is "exhale it in the breathing process"
Hope this helps! :)
Intercalated disks are found on the
muscle.
O a, striated
O b. nonstriated voluntary
O c. nonstriated involuntary
d. cardiac
Describe at least two costs and two benefits of using a desalinization plant to obtain more freshwater?
Answer:
Advantages:
1. provide drinking water in desertic regions
2. excellent water quality
Disadvantages:
1. high cost to obtain freshwater
2. possible harmful effects on the aquatic ecosystem
Explanation:
Desalinization plants are centers that provide an independent source of water, critical for human needs. Desalination plants function to remove salt from seawater, thereby turning this water into potable drinking water, which is of vital importance for areas where freshwater is scarce (e.g., desertic regions). Moreover, desalinization plants meet (or even may exceed) standards for water quality because they are prepared to remove impurities (not only salts) from seawater. Nonetheless, desalinization plants may also exhibit disadvantages. In the first place, desalinization is an expensive process that requires an important amount of electricity to push water through a filter (desalinization occurs via reverse osmosis). Finally, desalinization plants may alter aquatic ecosystems in a negative way since the discharge of seawater modifies the salinity and decreases the oxygen levels in the water at the disposal site.
1. In exponential population growth, A. every generation has a larger population than the generation before. B. the population remains below its carrying capacity. C. births and deaths are equal, but disease is limited. D. limiting factors eliminate predators in the population.
Which of the following are similarities between meiosis and mitosis?
Check all that apply.
2 points
There are two rounds of division
DNA gets replicated during S stage of interphase
prophase, metaphase, anaphase, and telophase occur in that order
four haploid daughter cells are produced
Answer: DNA gets replicated during S stage of interphase
prophase, metaphase, anaphase, and telophase occur in that order
four haploid daughter cells are produced
Explanation:
Fill in the Venn diagram with the items below
Answer:
Prokaryotes : DNA in cytoplasm
Eukaryotes : DNA in nucleus
Prokaryotes and Eukaryotes :
- contain cystol
- bound by membrane
- ribosomes