Answer:
c
Explanation:
It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.
What was Hershey-Chase experiment?The Hershey-Chase experiment, also known as the "Blender Experiment," was a classic experiment in molecular biology that was conducted in 1952 by Alfred Hershey and Martha Chase. It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.
In the experiment, components of the bacteriophage were labeled with radioactive isotopes of sulfur and phosphorus. The labeled phages were then used to infect bacterial cells, and the cells were subjected to various treatments to separate the viral components from the bacterial components.
The results of the experiment showed that the genetic material of the bacteriophage was made of DNA, not protein. This was determined by the fact that the labeled DNA, but not the labeled protein, was able to enter the bacterial cells and infect them. This experiment provided strong evidence for the "central dogma" of molecular biology, which states that genetic information flows from DNA to protein, but not the other way around.
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Scientific knowledge is always changing. At one time, the kingdom was the
highest level of
classification. Today, the highest level of classification is the domain. Two of
the domains, Bacteria and Archaea both contain microscopic prokaryotic
organisms. What would be the best reason for scientists to separate the
prokaryotes?
A)There were too many species of prokaryotes to only have 1 domain for them.
B)It was determined that neither have chloroplasts.
C)Both organisms do not contain organelles.
D)Research showed differences in living environments.
Answer:
d
Explanation:whater
Research showed differences in living environments is the best reason for scientists to separate the prokaryotes. Therefore, option (D) is correct.
What are prokaryotes?The organisms known as prokaryotes lack a nucleus and other organelles in their cells. There are two distinct groups of prokaryotes: the archaea and bacteria, both of which are thought to have evolved along distinct evolutionary lines.
Prokaryotic organisms or prokaryotes are organisms that lack a true nucleus and membrane-bound cell organelles. Mycoplasma, cyanobacteria, and bacteria are all examples of prokaryotes.
A prokaryotic cell carries out every one of the fundamental roles that an ordinary cell performs. Reproduction, respiration, digestion, and other biological processes are among their capabilities.
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This molecule provides stability to the phospholipid bilayer and without it the membrane would easily fall apart.
Answer:
The correct answer is - cholesterol molecules.
Explanation:
Cholesterol molecules are the molecules that acts as a bidirectional regulator for the lipid bilayer as it provides fluidity by raising the melting point of the membrane at high temperature and stabilize the membrane.
On the other hand, it also prevents the membrane from clustering or being tough or stiff by intercalates between the phospholipids at low temperatures. Therefore it is the molecule that provides stability to the membrane.
This is due today!
Alice and her friends looked at a bunch of ladybugs. They noticed the ladybugs had different numbers of spots. They each had different ideas about why the numbers of spots were different.
This is what they said: Which person do you agree with the most?
A) Karen: I think they must all be different species of ladybugs.
B)Troy: I think each ladybug has the same number of spots as its parents.
C)Isaac: I think it depends on the age of the ladybugs. As they get older they add more spots.
D)Fred: I think it has to do with the sex of the ladybug. Males will add more spots to compete for the females.
E) Andrea: I think it depends on what each ladybug was born with.
F) Alice: I think they change their number of spots when there is a need for them to do so.
Explain your thinking. Describe your ideas about why the ladybugs look different.
What is the genotype ratio?
Answer:
The genotypic ratio shows the number of times a characteristic of an organism will be seen in the offspring when genes for certain traits are crossed.
Explanation: hope this helps :p
HELP PLEASEE!!
You will build a simulation of a population using the same elements as the simulation pictured here and show how
the traits in this population change in years 5 and 10.
- Trait A
- Trait B
- Trait
1 circle = 50 organisms
Start off with 2,500 plants of which 50% have medium-tip leaves, 25% have wide-tip leaves, and 25% have drip-tip
leaves. Each circle in your simulation will represent 125 organisms. Calculate how many circles you need for each
trait, and then create your simulation. Be sure to include a key that states the color coding for each trait.
According to the concepts of percentage and proportions, we can make the simulation with 20 circles, each of them representing 125 plants. Traits A = 10 circles. Trait B = 5 circles. Trait C = 5 circles.
To solve this problem, we need to know two concepts, percentage and proportion.
What is a percentage?A percentage can be defined as a fraction or a part of 100. It is denominated as percent (symbol %).
100 refers to the number of parts into which the unit has been divided.
So, X% means that for every 100 parts, X parts are of our interest. Or, that we are interested in X fraction from a total of 100 parts.
What is a proportion?A proportion is the equal relationship between two determined ratios or quantities.
In the exposed example we need to represent this population of 2500 plants with circles.
We know that,
Each circle represents 125 plants50% of the population have medium-tip leaves, 25% have wide-tip leaves, and 25% have drip-tip leaves .So here, our unit is the population. We can say that our population of 2500 plants is composed by 100 subunits or parts.
2500 plants ------------ 100 parts
So now we will calculate how many plants are represented by the 50% and 25% of the population.
If 100% of the population equals 2500 plants, how many plants are 50% of the population and 25% of the population.
100% -------------------- 2500 plants
50% -------------------- X = (50% x 2500 plants) / 100% = 1250 plants.
25% ---------------------X = (25% x 2500 plants) / 100% = 625 plants
Now we know that from the total of 2500 (100%) plants,
1250 (50%) have medium-tip leaves, 625 (25%) have wide-tip leaves, and 625 (25%) have drip-tip leaves.Finally, we need to calculate how many circles represent these numbers. So, we know that 1 circle equals 125 plants. The question is, how many circles represent 2500, 1250 and 625 plants.
125 plants ----------------- 1 circle
2500 plants -------------X = (1 circle x 2500 plants) / 125 plants= 20 circles.
1250 plants --------------X = (1 circle x 1250 plants) / 125 plants = 10 circles.
625 plants ---------------X = (1 circle x 625 plants) / 125 plants = 5 circles.
So, our simulation must have 20 circles, from which
10 circles represent medium-tip leaved plants (Trait A), 5 circles represent wide-tip leaved plants (Trait B), and the remaining 5 circles represent drip-tip leaved plants (Trait C).In the attached files you will find the image.
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You return from lunch to science class, and there are two clear liquids on your
desk.
What is the best/safest way to determine what the liquids are?
A. Taste it
B. Touch with your bare fingers
C. Boil it
D. Drag a magnet through it
Answer:
My best guess would be boil it!
An area where an organism finds food, shelter and
water in a specific arrangement
People who have leukemia, a cancer that affects white blood cells, are often given Cytarabine. This drug inhibits the synthesis of DNA. Which phase of the cell cycle is most affected by Cytarabine?
A
Interphase
B
Cytokinesis
C
Prophase
D
Anaphase
Answer:
I think interphase because fna synthesis happens within the s-phase of the cell cylce and 5he s phase is suring interphase and not mitosis
The phase of the cell cycle which is most affected by Cytarabine is the Interphase. Thus, the correct option is A.
What is the cell cycle?The cell cycle may be defined as the entire sequence of events happening from the end of one nuclear division to the beginning of the next. The entire cell cycle can be divided into two phases.
The InterphaseThe M-phase (division phase).As per the question, the drug Cytarabine inhibits the synthesis of DNA, it definitely inhibits the interphase of the cell cycle. This is because the synthesis of DNA occurs in the S-phase of the cell cycle which is a substage of the interphase.
Therefore, the interphase of the cell cycle must be affected by the drug Cytarabine. Thus, the correct option for this question is A.
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hello help please i’ll mark brainliest!!!
Answer:
I would say the second one.
Explanation:
I'm sorry if it's wrong
Answer:
the answer is CONSISTING OF BILLIONS OF GALAXIES
How does increased heat energy affect the water cycle? Helpppp
Answer:
Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle.
Plz I really need help I don’t know what to write
Kai has a see-through glass tank with air, plants, and animals that eat
those plants. He sealed the tank so no material can get into or out of it,
but light can get in when the tank is not covered.
The light for the tank has been on all day, and Kai measured the carbon
in the air and found that it is decreasing. How is carbon moving between
the air and the living things in
the tank? What is happening to the amount
of carbon in living things?
Just tell me those two questions plz help me I will give you my points I swear plz help me I beg you
The amount of carbon is captured by plants to perform photosynthesis as a light for the tank has been on all day and prepare their own food. The product of photosynthesis is consumed by other organisms to perform cellular respiration.
What are the components of photosynthesis?The components of photosynthesis may include carbon dioxide, water, and sunlight as raw materials to convert into glucose (a food molecule).
The amount of carbon will not remain the same for the entire time in the living organism. The cycling of carbon is processed synergistically during photosynthesis and cellular respiration.
Living things in the tank respire out carbon, which is taken up by plants for photosynthesis, a product of photosynthesis are the reactants for cellular respiration. In this way, carbon delocalized among the living entities.
Therefore, it is well described above.
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6. Which of the following statements about niches is false?
A.Many different types of organisms can occupy the same niche.
B.The hermit crab uses a leftover mollusk shell as a home. His shell is part of his niche.
C.The crow is a quite adaptable organism and has a broad niche.
D.One aspect of a sloth's niche is the type of food it eats.
Answer:
a i think
Explanation:
The following statements about niches are false: The crow is a quite adaptable organism and has a broad niche, which is option C, as the niche is not a broad place but a place where the individual spends most of the time living and reproducing.
What exactly are "niches"?A niche is the place that an organism plays in its environment, including the physical space it occupies and the resources it uses, and it is the way that an organism interacts with its environment and with other organisms, whereas niches can be occupied by many different types of organisms, and in some cases, different organisms may even occupy the same niche at the same time, which is known as niche overlap.
Hence, the following statements about niches are false: Option C is the crow, which is a highly adaptable organism with a wide niche.
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need help asap
- 20 points , includes .
Answer:
D
Explanation:
Everything in there pollutes the environment.
Can someone please help me with this question?
Answer:
A
Explanation:
the body temperature drops below normal. All the other anwers the body compensates for the thing and stablizes it. The body temperature should incrase but it does not so it is not homoeostatis( which is keeping a balance).
The grizzly bear is a mammal, belonging to phylum Mammalia and kingdom Animalia. It belongs to the genus Ursus and the species Arctos. What is the scientific name of this organism?
Ursus Arctos.........
Who established Buddhism?
A. Confucius
B. Siddhartha Gautama
C. Laozi
D. Ashoka
Answer:B
Explanation:
Answer:
B. Siddhartha Gautama
Explanation:
Siddhartha Gautama, the founder of Buddhism who later became known as “the Buddha,” lived during the 5th century B.C. Gautama was born into a wealthy family as a prince in present-day Nepal.
A football player kicks a ball 6.5 meters how much time is needed for a ball to travel this distance if it's speed is 22 m/s
Answer:
.3 m/sec
Explanation:
Mitochondria are cell structures that contain a small quantity of DNA.
Scientists are sequencing the DNA of one particular gene in mitochondria to
help identify different species of many animals including myriapods. The
sequences that they find are called ‘barcodes’.
(i) State the part of the cell that contains most of the DNA.
[1]
(ii) Suggest how DNA barcoding might be useful in the classification of animals,
such as myriapods.
need help on number 6
Answer:
CAG- GTG- GAC- TGA- GGA- CTT- CTC
Dna complementary strand would be
GTC- CAC- CTG- ACT- CCT- GAA- GAG
Mark brainiest, please
If 22% of a DNA sample is made up of cytosine, C, what percentage of the sample is made up of adenine,
A?
Answer:
28% of Adenine
Explanation:
Chargaff's Rule states that A = T and C = G
Because of that, the sample must have the equation:
A + C = T + G
G must have the same amount as C so,
A + .22 = T + .22
Both sides of the equation must equal each other by .50, so .50 - .22 = .28
.28 x 100 = 28%
If 22% of a DNA sample is made up of cytosine, C, the percentage of the sample is made up of adenine, A is 28%
What is DNA?The DNA sequence is the sequence or pairing of DNA bases. RNA and DNA both are genetic materials and both are made up of nucleic acids made up of deoxyribose acid and iron is made up of ribonucleic acid.
DNA and RNA both contain four bases that are joined with hydrogen bond RNA contain uracil in the place of thymine and DNA contain timing all other bases are the same.
Chargaff's Rule states that A = T and C = G
Because of that, the sample must have the equation:
A + C = T + G
G must have the same amount as C so,
A + .22 = T + .22
Both sides of the equation must equal each other by .50, so .50 - .22 = .28
.28 x 100 = 28%
Therefore, the percentage of the sample is made up of adenine, A is 28%
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In the diagram of the plasma membrane shown below, which structures are indicated
by letters A and B?
Answer:
A - proteins; B - lipids
Algae produce food by the process of....?
Answer:
Photosynthesis
Explanation:
what diseases can affect the digestive system?
what diseases can affect the respiratory system?
how do these diseases in each of these organ systems disrupt homeostasis?
Answer:
Lots of things can effect the lungs and GI systems from virus to bacteria. Any illness in either location can upset homeostasis. homeostasis is just the baseline normal of a human. So, if an illness causes fever then it upsets the balance, both chemical as well as hormonal.
Every day the moon rises nearly an hour later than it did the previous day. What is the reason for this?
How can a change in structure to an organisms' cell negatively effect that organism?
Which enzyme breaks down cannabis?
CYP1A5
ALDH
CYP2D6
CYP3A11
CYP2A4
Answer:
I believe it is either CYP2C9 or CYP2D6 that breaks down cannabis.
Limiting nutrients often...
Answer:
hiii
Explanation:
Why are DNA fingerprints are more reliable than hand fingerprints in solving crimes.
please help me i don’t know nun of this
Answer:
A and A
Explanation:
Answer:
idek
Explanation:
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A dog, a human, and an ant all use their legs for locomotion. Which statement(s) below accurately characterize the evolutionary
relationship between these species? Select ALL that apply.
Answer: B,C, and E
Explanation:
All the following apply:-
Legs are homologues between the human and dog , but analogues in the ant.
Humans and dogs have more recent common ancestor then the dog and the ant
DNA sequence comparison for the human and the dog will show greater homologue than between the dog and ant.
What are homologues organs?
These are the organs which are anatomically similar but differ in function.
What are analogues organs?
These are the organs which are anatomically different but functionally similar
Hence the B), C) and E) are correct option.
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