Answer:
The cornea
Explanation:
The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air.
Answer: The cornea is the only part of the human body that has no blood supply. It gets oxygen directly through air.
Explanation:
To qualify as a mineral, a substance must:
A. have a chemical composition that varies with temperature.
B. exist as a liquid.
C. be organic.
D. occur naturally.
Answer:
Explanation:
The one characteristic that is true of those given is D. It occurs naturally.
The example of an abiotic element in the environment is the
Answer:
[tex]I~am~beinggreat78~and~am~here~to~help~you.[/tex]
An example of an abiotic element is the air. We use the air, which carries oxygen everyday to breathe, but is the air living? No, air is not a living thing.
A student conducted a controlled experiment to test the affects of tea tree oil on the growth of Trichophyton rubrum, the primary cause of athlete's foot. He inoculated 10 test tubes of broth with the fungus and then added 1 mL of a tea tree oil solution to each.
If the results of the experiment are valid, a similar experiment will most likely produce
A.
results that are similar but with slightly different data.
B.
entirely different results with no obvious pattern.
C.
the exact same data in every circumstance.
D.
entirely different results with the opposite pattern to the first.
If the results from the controlled experiment to test the effects of tea tree oil on the growth of Trichophyton rubrum are valid, a similar experiment should produce results that are similar but slightly different data.
What is reproducibility?In science, valid results from experiments must be reproducible.
In other words, the same experiment carried out by different researchers must produce similar results with very little to no variation.
If results from an experiment are not reproducible, such results cannot be valid as far as science is concerned.
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Many ideas concerning cells have been proven and incorporated into cell theory. Which of the following is not part of the cell theory?
A All living things are composed of one or more cells.
B All new cells come from other cells.
C Cells are the basic unit of structure and function in living things.
D All cells reproduce through photosynthesis.
Answer:
all cells reproduce through photosynthesis
Explanation:
Answer: a is correct
Explanation:
I did it
In the Tough Man Competition, very strong men are challenged to push or pull extremely large and heavy objects to test their strength. In
one such challenge, they were asked to push one of two rail cars, an engine car and a box car. The data tables show one man's results.
Look over the data table and answer the questions below.
Force Applied by the
Tough Man
Did it move the
engine car?
No
Did it move the
boxcar?
No
1000 Newtons
2000 Newtons
No
No
3000 Newtons
Yes
No
A Why couldn't the strong man move the box car with a force of 3000 Newtons?
Make sure to include Newton's 2nd Law in your explanation.
B. What could be done to move the boxcar?
C. Another student claims that during the competition, the sum of the forces on the boxcar was O N.
What evidence is the student using to make this claim? Be sure to explain your thinking.
o Tyne here to search
Based on the Newton's laws of motion, the motion of an object is due to an unbalanced net force.
What is Force?A force is a push or pull effect which causes a change in the motion or state of an object.
Newton's second law states that the acceleration of an object is to the net force acting upon the object, and inversely upon the mass of the object.
Thus, motion occurs when there is greater net force acting on an object.
From the diagram shown above, when a force of 3000 N is applied by the man, the boxcar does not move because the force applied by the man is less than the force on the boxcar.
The box car will move if a force greater than that on the boxcar were applied to it.
According to Newton's third law of motion, for every force, there is an equal but oppositely acting reactionary force, therefore, the net force on the boxcar is 0 N.
Therefore, the motion of an object is due to an unbalanced net force.
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Lateralization is defined as
Answer:
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The main idea of a text can also be called its conclusion.
False
True
What does it mean that DNA replication is semi-conservative?
A. It means that the old DNA is destroyed and only the new copies are kept.
B. It means that after replication the new strand is destroyed.
C. It means that after replication the old strand is destroyed and only the new strand is kept.
D. It means that each set of DNA contains an original strand and a new strand.
What is the number of individuals that are needed for a species to continue?
a. Critical Mass
b. Endangered species
c. Extinction
Answer:
a
Explanation:
because critical mass is the number of individuals that must exist for a species to continue.
Answer:
a
Explanation:
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19) How bright a star appears to us on Earth depends MAINLY on
A) the age of the star.
B) your position on Earth.
C) the composition of the star.
D) the star's distance from Earth.
Answer:
I believe its D) the star's distance from Earth
Answer:
The star's distance from earth
Explanation:
I just did it on USATestPrep
4/10
If Sara has a mass of 60 kg and lives on the fifth floor of her
apartment 18 m above the ground, then what is her
gravitational potential energy?
Use g=9.81 m/s2 for the acceleration due to gravity.
The gravitational potential energy of Sara at the given height is 10594.8J.
Given the data in the question;
Mass of Sara; [tex]m; = 60kg[/tex]Distance from ground; [tex]h = 18m[/tex]Acceleration due to gravity; [tex]g = 9.81m/s^2[/tex]Gravitational potential energy; [tex]U = \ ?[/tex]Gravitational Potential EnergyGravitational potential energy is the potential energy an object with mass posessses relative to another object with mass due to gravity.
It is expressed as;
[tex]U = mgh[/tex]
Where m is mass, h is height and g is acceleration due to gravity.
To determine the gravitational potential energy of Sara, we substitute our given values into the expression above.
[tex]U = mgh\\\\U = 60kg * 9.81m/s^2 * 18m\\\\U = 10594.8kgm^2/s^2\\\\U = 10594.8J[/tex]
Therefore, the gravitational potential energy of Sara at the given height is 10594.8J.
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what is a cardiovascular diseases
Answer:
Disease that is related to heart & other circulation system can be considered as cardio vascular disease especially disease related to heart..
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When the Punnett square is filled out, what do the four boxes represent?
The four different outcomes for the genes of what is being made.
What is a cloud of dust and gas in space known as?
O a galaxy
O a nebula
O a solar system
O an asteroid
Answer:
B. Nebula
Explanation:
A solar system, an asteroid, and a galaxy is not made of dust and gas. But a nebula is made of dust and gas
Answer - It says a NEBULA is an enormous cloud of dust and gas occupying the space between stars and acting as nursery for new stars.
What is one of the drawbacks of selective breeding?(1 point)
Explanation:a reduction in genetic diversity and discomfort for animals that have very exaggerated characteristics.
true of false cytosine is a purine base
Answer:
It's True.
Explanation:
i hope this helps.
Determine why multicellular organisms need multiple cells in order to survive.
The concentration of sodium on the inside of the cell is 20 mM. The outside of the cell has a sodium concentration of 115 mM. Which mechanism of ion uptake would best move sodium from the inside of the cell to the outside?
Answer:
d) active transport
Q4: What area of Earth is receiving the most solar radiation?
Answer:
The Equator
The equator is the center of the globe, it receives the most sunlight and radiation.
Why does it benefit an imperial shrimp to travel on a sea cucumber?
A. The shrimp feeds on the sea cucumber as it rides.
B. The shrimp could move to a new feeding ground.
C. The sea cucumber is one of the shrimp’s predators.
D. The sea cucumber carries parasites that the shrimp eat.
Answer:
B
Explanation:
Because the Imperial Shrimp uses little to no energy moving around because the Sea Cucumber does the moving for it while it goes to new feeding grounds.
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An aquatic food chain would be found in Earth's_____?
1) lithosphere
2) hydropshere
3) atmosphere
4) troposphere
An atom on the periodic table can be identified by its
Answer:
The number of protons in it.
Explanation:
There are two properties that can be used to identify an element:
the atomic number the number of protons in an atom.The number of neutrons and number of electrons are frequently equal to the number of protons, but can vary depending on the atom in question
What other types of molecules can be sorted by length, besides DNA?
Answer:
Protein
Explanation:
Gel electrophoresis is a technique used to separate DNA fragments according to their size.
In what part of a chloroplast does the Calvin cycle occur?
A. Bilayered membrane
B. ATP synthase
C. Hydrogen ion puma
D. Stroma
SUB
For the following organisms, choose the correct order of increasing trophic level. a. fungi, deer, wolf and grass b. fungi, grass, wolf and deer c. grass, deer, wolf and fungi d. grass, fungi, wolf and deer Please select the best answer from the choices provided
Answer:
Your answer is C
Explanation:
The correct answer is for the following organisms, is grass, deer, wolf and fungi that is the option c as the trophic level refers to the position of an organism in a food chain.
The trophic level refers to the position of an organism in a food chain or food web. In a food chain, energy flows from one trophic level to the next as organisms are eaten by other organisms. Grass occupies the first trophic level as a primary producer. Deer occupy the second trophic level as they feed on primary producers (grass). Wolves are carnivores and occupy the third trophic level as they feed on herbivores (deer). Fungi occupy the last trophic level as decomposers, so this is the correct order among all other options.
Thus, correct option is option c.
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Why does swimming fast require lots of energy?
Answer:
A 160-pound person burns approximately 423 calories an hour while swimming laps at a low or moderate pace. That same person may burn up to 715 calories an hour swimming at a more vigorous pace. A 200-pound person doing the same activities would burn between 528 and 892 calories an hour.
But why?
Water temperature affects physiological systems which can make you tired.Swimming is a full-body workout.Swimming can cause dehydration.Swimming workout intensity can affect energy levels.Nutritional timing before and after swimming can affect fatigue.Swimming in the sun can make you tired.Explanation:
Answer:
swimming requires lots of energy because you need the energy to keep your body warms hole in the water and also to help in metabolism
10. Use the data and what you have learned about evolution to explain how mutation is a random process, but
hatural selection is not random.
Answer:
Mutations are random, but natural selection is not random. Different mutations can cause the same phenotype. Evolution repeats itself in different environments.
Explanation:
Introduced by Charles Darwin, natural selection is the idea that a species adapts to its environment through changes in its genetics. Natural selection is not random, though the genetic changes (or mutations) that are filtered by natural selection do come about randomly.
explain:
16. Which statement best describes the way that
an adenosine diphosphate (ADP) molecule
becomes an adenosine triphosphate (ATP)
molecule in the human body?
C
A. Protein causes phosphate molecules to bind to
Sugars and form ATP.
B. Food energy is used to attach a phosphate
molecule to an ADP molecule.
C. lonized oxygen in cells causes sugars and
phosphate molecules to form ATP.
D. Water breaks down ADP molecules which form
into ATP molecules over time.
B. Food energy is used to attach a phosphate molecule to an ADP molecule
An adenosine diphosphate (ADP) molecule evolves an adenosine triphosphate (ATP) molecule in the human body B. Food energy is utilised to tie a phosphate molecule to an ADP molecule.
How does ATP store its energy?ATP or Adenosine triphosphate acts as the energy of the cell.
It keeps the energy released in the oxidation of glucose during cellular respiration.
ATP is split into ADP and Pi and energy is freed.
Thus, option "B" Food energy is used to attach a phosphate molecule to an ADP molecule.
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Small flies are younger than larger flies,
True
False
Answer: Small flies are younger than larger flies
-True
what molecules do plants take in for their energy needs
Answer:
Photosynthesis is the process by which plants produce food. Plants use their leaves to trap light energy during photosynthesis. Plants use the sun's energy to convert water and carbon dioxide into glucose, a sugar. Plants use glucose for energy and to manufacture cellulose and starch, among other things.
Another explanation:
Also, photosynthesis is a chemical reaction that takes place in a plant's leaves and requires both chlorophyll and light energy. Chlorophyll in leaves aids in the conversion of carbon dioxide and water into oxygen and glucose during photosynthesis. Glucose serves as a critical source of nutrition for the plant.
