Answer:
The most common example of a molecular pump in the human body is the pump for sodium and potassium.
Explanation:
Sodium ions and ATP bind to the pump to use energy to change the shape. The sodium then leaves and the potassium can now bind due to the shape change. The potassium ions are then released and the pump goes back to normal for the cycle to repeat again.
Why did you not see any chloroplasts in the onion epidermal cells, unlike in the Elodea (Anacharis) cells?
-Chloroplasts in onion cells are hidden by the large central vacuole.
-The part of the onion viewed under the microscope grows underground.
-The purpose of chloroplasts is to make the plant green but onions are not green.
-Chloroplasts are organelles that absorb sunlight energy and perform photosynthesis.
-Plant parts that grow underground are not exposed to sunlight.
-Onions had chloroplasts before they were picked from the ground but the chloroplasts dried up and disappeared after being exposed to the sunlight.
-Onions are not plants and therefore do not have chloroplasts.
-Plant parts that are not exposed to sunlight cannot do photosynthesis.
What are the major types of nutrients you can get from food?
Answer:
Carbohydrates (CHO), Lipids (fats), Proteins, Vitamins, Minerals, Water.
Explanation:
This disorder is characterized by severe pain or throbbing on one side of the head and
can last up to a few days.
O Migraines
Epilepsy
O Dementia
O Quadriplegia
Which of the following BEST describes the recommended simple sugar intake for athletes?
A.Most athletes should eliminate all sugar from the diet.
B.Most athletes should keep sugar intake to less than 5% of total daily energy intake.
C.Most athletes should keep sugar intake to less than 10% of total daily energy intake.
D. Sugar should not be restricted in the athlete's diet because it provides a good source of carbohydrate for the working muscle.
.
Answer:
B
Explanation:
because sugar is common in food but he needs to limit it
In 1929, Edwin Hubble observed the velocity at which galaxies were moving away from the Milky Way. The graph below shows the relationship between this velocity and the distance those galaxies were from the Milky Way.
What conclusion can be drawn from Hubble’s data?
Objects that are closer are moving slower, suggesting that the Universe is shrinking.
Objects that are closer are moving faster, suggesting that the Universe is expanding.
Objects that are farther away are moving faster, suggesting that the Universe is shrinking.
Objects that are farther away are moving faster, suggesting that the Universe is expanding.
Answer:
Answer is a
Explanation:
A. lozxzxzl stxzop chxzxzeating oxzn testzs lmaxxo
Answer:D
Objects that are father away are moving faster,suggesting that the Universe is expanding .
Explanation:I took an test on this it’s right
Most of the Earth's volume is contained in the _______ .
A.
mantle
B.
crust
C.
outer core
D.
inner core
Answer: Mantle
Explanation: I got it right on study island
Which of the following is not a characteristic of electrons
Answer:
i dont know what the following are buttt here are some Characteristics of electrons -
Electrons are negatively charged particles.
They revolve around the nucleus in various energy levels.
They can be excited to higher energy levels by absorbing energy.
Mass of electron is 1/2000 times of proton/neutron.
In a typical barrel of oil, roughly what percent will be refined into gasoline?
5
10
15
20
25
Answer:
20%
Explanation:
Why are phospholipids of the plasma membrane oriented such that their heads are at the membrane surfaces and their tails are buried in the interior of the membrane?
Answer:
The plasma membrane is semi-permeable. The reason for this is because of the orientation of the phospholipids. The heads at the surface are hydrophilic so they face the water. The tails are hydrophobic so they face away from the water.
Explanation:
The phospholipids of the plasma membrane are oriented such that their heads are at the membrane surfaces and their tails are buried in the interior of the membrane - due to the fact that phospholipids have hydrophobic tails and hydrophilic heads.
Phospholipids consist of fatty acids and alcohol in the plasma membrane are arranged in two layers, known as the phospholipid bilayer. It has a hydrophobic or water-hating tail and a hydrophilic or water-loving head.
it has a head and two tails.As the tails are hydrophobic so, face the inside, away from the water.As the heads are hydrophilic so face outwardHeads are towards intracellular and extracellular fluid.Tails are meet the inner layerThus, the correct answer is - due to two layers of hydrophobic tails and hydrophilic heads.
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which of these is an adaptation that helps fish survive in the bathyal and abyssal zones?
A dark-colored body
B
A yellow or orange body
с
Reduced sense of smell
A. Dark-colored body
In the abyssal and bathyal zones, it is so deep that light does not penetrate the water, so it is completely dark. A dark-colored body helps fish survive as it camouflages them.
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Question 20 of 20 :
Select the best answer for the question
20. Which of these statements about the Ogallala Aquifer is true?
O A. Its water usage is closely regulated,
O B. It's beneath the East Coast.
O C. It's running out of water.
D. It has enough water to last 6,000 years.
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Answer:
C!!
Explanation:
It's not B because it's located in the great plains. Not D because in 50 years, 70% of the aquifer will be gone. Not A because water use isn't regulated.
Ogallala Aquifer is the rock holding the groundwater in the Great Plains of America. The Ogallala Aquifer is running out of water. Thus, option C is correct.
What is Ogallala Aquifer?Ogallala Aquifer is an underground layer of water that is held by the rocks, pebbles, and gravel that make the water well above the surface. It is not beneath the East Coast but is situated on the Great Plains of the United States.
It has been reported that the water usage of the Ogallala Aquifer is not regulated and hence it does not have enough water to last up to 6,000 years. At approx 70%, the water of the aquifer will be soon gone resulting in the deprivation of the water.
Therefore, option C. the Ogallala Aquifer is running out of water is correct.
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Contrast the two types of plant reproduction. Help me please its due today
what is a solution biology
Answer:
A homogeneous mixture made of two or more substances.
A solution is a homogeneous mixture of solvent and solute molecules. The solute then diffuses through the solvent until the concentration is equal in all parts of the solution. ... A solution can be liquid, solid, or gaseous. Further, a solution can be a mixture of liquids, gases and solids.
Explanation:
In 1998 paleoanthropologist Rick Potts of the Smithsonian institution published an article in the yearbook of physical anthropology a peer reviewed Journal the article was titled environmental hypotheses of hominin evolution in his paper pots provided evidence to support his claim that gray variations and environmental conditions over time or responsible for the attacks ability of humans and the success of our species why might this not be the best article to reference?
Answer:
Because the author of the article did not do an experiment to draw his own conclusions and issue his own information, but he did a bibliographic review of the work of other authors to write his own article.
Explanation:
The article presented in the question above was done through a bibliography search and not through an experiment. This means that the author did not test the hypotheses through a scientific experiment, but formulated the conclusions of his article, based on the works of other authors, which makes this article not the best option to be considered as a reference article.
What is meant by the term "density"? Please provide an example of how
density is determined in air masses.
Answer:
1) density "the degree of compactness of a substance."
2) air masses "More dense, or “heavier” air will slow down objects moving through it more because the object has to, in effect, shove aside more or heavier molecules. Such air resistance is called “drag,” which increases with air density."
Explanation:
BRAINLIEST? plz
A scientist is researching two different traits in an insect: body texture and color. Smooth body (B) is dominant to bumpy body (b), and gray (G) is dominant to white (g). A BbGg and a bbgg insect mate and produce the following 480 offspring: Phenotype Number of Offspring Smooth, gray 119 Bumpy, white 117 Smooth, white 123 Bumpy, gray 121 What type of inheritance is displayed from these offspring
Answer:
Independent assortment
Explanation:
The type of inheritance displayed by the offspring is a simple independent assortment inheritance according to Mendelian law.
The result of crossing BbGg and bbgg is as follows (see the attached image)
4 BbGg smooth and gray
4 Bbgg smooth and white
4 bbGg bumpy and gray
4 bbgg bumpy and white
The phenotype ratio from the cross is 1:1:1:1 as far as the independent assortment is concerned.
Now, looking at the population of each phenotype from the cross
Smooth, gray 119
Smooth, white 123
Bumpy, gray 121
Bumpy, white 117
119:123:121:117 is approximately equal to 1:1:1:1.
Hence, the cross agrees with Mendel's law of independent assortment of genes.
Where do the thickest deposits of terrigenous sediment typically form?
A. deep-ocean trenches, such as the Mariana Trench
B. mid-ocean ridges
C. abyssal plains
D. continental margins near the mouths of rivers
Answer: D. continental margins near the mouths of rivers
Explanation:
Terrigenous sediments are those that are formed via processes on land as opposed to in water. They result mostly from the erosion of rocks and yet make up 20% of all ocean sediments.
Continental margins near the mouths of rivers contain the thickest deposits of this sediments as they are closest to land which is the source. It is made more convenient by the presence of rivers bringing the sediments to them when the rocks are eroded.
Select the correct answer from each drop-down menu.
According to the principles of hydrology, what happens to the freezing point of water when you add salt and raise the water pressure?
According to the principles of hydrology, adding salt _____ the freezing point of water and ______ the boiling point.
1st Blank:
A. Raises
B. Lowers
C. Doesn’t change
2nd Blank:
A. Raises
B. Lowers
C. Doesn’t change
Answer:
1. B) lowers
2. A) raises
Why do viruses not fit easily into the broadest taxonomic category, life? (Choose all that apply)
1. They are not made of cells.
2. They have a capsid.
3. They do not reproduce on their own.
4. They do not respond to stimuli.
Answer:
viruses are not fit into broadest taxanomic system because:
they are not cells
they do not reproduce their own
they do not respond to stimuli.
Explanation:
viruses have capsid and are not cells. to be a cell they must have a cell membrane while viruses lack cell wall. they replicate by using the host machinary in which they are causing infection. they are acellular and obligate intracellular parasites of anials plants fungi and bacteria.
Answer:
they are not cells
they do not reproduce their own
they do not respond to stimuli
Explanation:
and i just took a test about this
In the year 2374, humans finally developed the technology necessary for time travel. You are a scientist interested in the population genetics of extinct animals. After seeing Jurassic World, you decide to go back in time to study a population of velociraptors. The skin color of this dinosaur varies between tan (dominant) and brown (recessive). You observed 336 tan velociraptors and 64 brown velociraptors during your study. Assume the population is in Hardy-Weinberg equilibrium. a) What is the allelic frequency of the dominant (tan) allele in the population
Answer:
The allelic frequency of the dominant (tan) allele in the population equals 0.6
Explanation:
Due to technical problems, you will find the complete explanation in the attached files.
HELP :(
Where can magma be found on the surface of the earth?
○ In active volcanoes
○ Underneath lakes and rivers
○ In between all continental plates
○ In the aftermath of an earthquake
Hii!! The correct answer is A. In active volcanoes. (:
Select the correct answer.
Which of these activities increases the amount of carbon in the atmosphere?
Agriculture has only a positive impact on the land.
True or False?
False; Agriculture can negatively impact the environment when fertilizer enters the water, contaminating it. Agriculture can also lead to deforestation, the lack of trees will lead to erosion.
what are three ways mutations can occur
I will give brainlest answer
If the results of your experiment do not support your hypothesis, you should
a. Publish your results anyway
b. Consider the results abnormal and continue working
c. Find a way to rationalize your results
d. Try another metho
the failure of homologous chromosomes to separate correctly during meiosis is called
Answer:
Aneuploidy is caused by nondisjunction
Explanation:
Aneuploidy is caused by nondisjunction, which occurs when pairs of homologous chromosomes or sister chromatids fail to separate during meiosis. The loss of a single chromosome from a diploid genome is called monosomy (2n-1), while the gain of one chromosome is called trisomy (2n+1).
Explanation:
Nondisjunction in Meiosis : Nondisjunction occurs when homologous chromosomes fail to separate during meiosis, resulting in an abnormal chromosome number
What are two ways selective breeding is helpful in agriculture? A. It can take many generations to get desired traits. B. It can cause animals to inherit two recessive alleles C. It can produce crops that are resistant to pests. D. It can result in animals that can produce more food.
The two ways in which selective breeding is helpful are that it can produce crops that are resistant to pests and animals that can produce more food; these are options C and D.
What is the importance of selective breeding?Selective breeding produces plants and animals that are genetically modified to have a specific trait, such as animals being modified to produce higher-quality milk and meat or plants being modified to produce pest-resistant foods. This type of breeding and its resultant product are different from the wild type, and generally, these products are made for the commercial purpose of feeding a large population.
Hence, the two ways in which selective breeding is helpful are that it can produce crops that are resistant to pests and animals that can produce more food; these are options C and D.
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Match the reactants to their source. Help please
Answer:
Carbon: Soil. - Water: Atmosphere. I don't really know this, sorry if it's wrong.
Which is the significance of the tunica in plant growth? HINT: It's not B.
A. In the tunica, cell divisions are perpendicular to the stem axis, giving rise to thin layers of tissues covering the outside of the tip.
B. In the tunica, cell divisions are parallel to the stem axis, giving rise to thin layers of tissues covering the inside of the tip.
C. In the tunica, cell divisions are perpendicular to the stem axis, giving rise to thick layers of tissues covering the outside of the tip.
D. In the tunica, cell divisions are parallel to the stem axis, giving rise to thick layers of tissues covering the inside of the tip.
Answer:
D. In the tunica, cell divisions are parallel to the stem axis, giving rise to thick layers of tissues covering the inside of the tip.
Explanation:
If there are 21 boys and 42 girls in a room, fill out all of the possible ratios of boys to girls that could be made.
We have that for the Question "If there are 21 boys and 42 girls in a room, fill out all of the possible ratios of boys to girls that could be made." it can be said that
the possible ratios of boys to girls that could be made are
21:421:210:205:10And any ratio that gives a ha
From the question we are told
If there are 21 boys and 42 girls in a room, fill out all of the possible ratios of boys to girls that could be made.
Generally the equation for the Ratio is mathematically given as
x=21:42
Therefore
21:42
1:2
10:20
5:10
Therefore
the possible ratios of boys to girls that could be made are
21:421:210:205:10And any ratio that gives a half
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