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:
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
14. Cats have bones in their front legs that are similar to humans and also similar to the bones in the front flipper of a turtle. What do scientists hypothesize that
this means?
a These are homologous structures - they have similar structure despite their different functions and provide evidence that they evolved from a common ancestor.
b These are homologous structures - because of their different functions they do not provide evidence of a common ancestor and the limbs did not evolve from a single
common ancestor.
c These are analogous structures - they have similar structure despite their different functions and provide evidence that they evolved from a common ancestor.
d These are analogous structures - because of their different functions they do not provide evidence of a common ancestor and the limbs did not evolve from a single
common ancestor.
Accounts with not serious answers will be reported
Answer:
I believe that the answer is D.
Explanation:
This is because these organisms don't seem to evolve from a common ancestor but do seem to look similar.
How did Bourne believe that an object could be made to rise and sink at will?
a.
By increasing and decreasing volume
c.
Putting more force on the object than the buoyant force
b.
Using a series of weights
d.
Piping air in from the surface
Please select the best answer from the choices provided
A
B
C
D
Answer:
A
Explanation:
a. By increasing and decreasing volume
:))))))))))) I would appreciate the help
What is the most important influence of the forest ecosystem on the environment
Answer:
Forests
Explanation:
Forests have also sanitary influences upon environment due to the production of oxygen through photosynthesis.
The study of the environment is called ecology. There are two types of factors for an ecosystem and these are a biotic and abiotic factors.
The correct answer is light
What is photosynthesis?The process of the formation of food by trapping the sunlight with the help of chloroplast is called photosynthesis.
According to the question, the most influential factor which affects the environment is light as all the plants directly depend on the light for the formation of food and all the other species are dependent on plants either directly or indirectly.
Hence, the correct answer is light.
For more information about the light, refer to the link:-
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what are some examples of heart healthy fats?
Answer:
Omega-3 fatty acids can help lower triglycerides, a type of fat that clogs arteries. Monounsaturatedfatsincludecanola,olive, and peanut oils. Other good sources are olives, avocados, nuts, and nut butters. These fats can help lower "bad" (LDL) cholesterol and raise "good" (HDL) cholesterol.
Explanation:
My dad takes omegas because he has high cholestrail which that also helps with heart problems.
What is the answer to number three and four I’m like totally confused
Answer:
I think it is true for 3 and false for 4 but i am 100% so i won't trust me fully so yeah.
Explanation:
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.
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.
write it in your own words
Why is it important to know there are good and bad bacteria?
What makes human populations increase or decrease in size?
What is the role of the respiratory system?
What happens when you breathe?
What happens in the circulatory system?
What are the structures of the heart?
How does blood flow through the circulatory system?
What does blood contain?
Answer:
The human respiratory system contains the organs that allow us to get the oxygen we need and to remove the waste carbon dioxide we do not need. It contains these parts: two lungs. ... various structures in the chest that allow air to move in and out of the lungs.
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:
Eukaryotic gene regulation takes place through the use of RNA-
binding proteins called ________
and
short regions of DNA that help position RNA polymerase called
_________.
At the organism level, ________.
control the differentiation and development of cells during
embryonic development.
Answer:
Hi your answers would be transcription factors, TATA boxes, and homeotic genes
Eukaryotic gene regulation takes place through the use of RNA- binding proteins called transcription factors and short regions of DNA that help position RNA polymerase called TATA boxes.
At the organism level, homeotic genes control the differentiation and development of cells during embryonic development.
Transcription factor:Transcription factors are proteins involved in the process of converting, or transcribing, DNA into RNA. Transcription factors include a wide number of proteins, excluding RNA polymerase, that initiate and regulate the transcription of genes. Regulation of transcription is the most common form of gene control.
Find more information about genes here:
brainly.com/question/1480756
Intercalated disks are found on the
muscle.
O a, striated
O b. nonstriated voluntary
O c. nonstriated involuntary
d. cardiac
Which process occurs by osmosis?
Select one:
a. plant roots absorbing water from the soil
b. the small intestine absorbing fatty acids into the blood
c. the small intestine absorbing glucose into the blood
d. plant roots absorbing mineral ions from the soil
Plant roots absorbing water from the soil occurs by osmosis.
Are roots absorbing water osmosis?Plants absorb water from the soil by osmosis. They absorb mineral ions by active transport, against the concentration gradient. Root hair cells are adapted for taking up water and mineral ions by having a large surface area to increase the rate of absorption.
Do plants absorb water through osmosis?Plants absorb water and minerals salt from the soil with the help of root hairs. They absorb water by the process of osmosis. Osmosis is the movement of water molecules (solvent) from a lower concentration solution to a higher concentration solution through a semi-permeable membrane.
Learn more about osmosis here https://brainly.com/question/11534932
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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.
Potential energy is energy that is not in
motion. Which of the following is an
example of potential energy?
A. riding your bicycle
B. sitting on a bench
C. mowing your lawn
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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
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.
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The virus first hypothesis, suggests that:
a.
viruses evolved from the living cells
b.
viruses may have been the first self-replicating entities
c.
viruses originate from bacteria cells
d.
viruses don't evolve
Answer:
b.
viruses may have been the first self-replicating entities
Explanation:
The “virus-first” hypothesis states that viruses predated cells and contributed to the rise of cellular life. A significant proportion of all the viral genomes encode for genetic sequences that lack clear cellular homologs. Presence of such virus-specific sequences provides support to their unique origin.
What is an immune response?
Answer:
The immune response is how your body recognizes and defends itself against bacteria, viruses, and substances that appear foreign and harmful.
Hope this helps!
Compare and contrast the outer core and the inner core. Mention 2 differences between the two cores.
Answer:
The outer core is colder than the inner core, and they are both inside the Earth. The inner core is the deepest layer of Earth's layers.
Explanation:
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.
Question 42
1 pts
A man with type O blood has a child with a women who is tye AB. What is the probability
that they will have a child with type o blood?
O 100%
O 50%
O 0%
25%
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
During 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! :)
Calculate the net force in Newtons of the following situation <-2N+->8N
Answer:
The correct answer is: + 6 N to the right side.
Explanation:
In this question, there are two opposite forces one towards the left and the second one towards the right. The left-pointing force value of 2 [N] while the other Force points to the right with a value of 8 [N].
In arithmetic representation it could be demonstarted or write as:
F = -2 + 8
F = + 6 [N]
The force pointing right side is more and will have the force of = 6 N
Is there a human carrying capacity on Earth? Explain why or why not.
Answer: Every species has a carrying capacity, even humans. However, it is very difficult for ecologists to calculate human carrying capacity. Humans are a complex species. We do not reproduce, consume resources, and interact with our living environment uniformly.
HOPE THIS HELPS