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Cell membrane have been the selective membrane that allows transportation. Sodium and potassium ions need a protein pump as they are charged particles that move against the gradient and need energy. Thus, option D is correct.

Active transport has been the way to move ions and molecules inside and outside the cell membrane. This system of transportation requires energy as the ions move from low concentration regions to the region of the higher electrochemical area.

The sodium and potassium pump needs proteins and energy to move the ions as the inside of the cell is rich in potassium and the exterior is rich in sodium ions. The charged ions moving against the concentration cannot enter the cell without energy and protein pumps.

Therefore, option D. all of the above statements are correct.

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Answer:

Yes.

Explanation:

Yes, a tree is falling over in a forest make a sound because both the tree and ground are hard surfaces which can produces sound by contact physically with each other. For testing this hypothesis, we have to take a tree and cut that tree. when the tree falls on the ground it will definitely produces sounds by contact physically with the ground when falls with a large force.

Answer:

Cause: Earth’s magnetosphere traps radioactive  solar wind particles in bands around Earth → Space travel through the Van Allen  belts is dangerous.

Cause: Earth is surrounded by a magnetic field → Effect: Solar wind deflects toward the poles.

Cause: Solar wind particles interact with Earth’s  upper atmosphere → Effect: An aurora is created

Explanation:

I have been able to drag the tiles to the correct boxes to complete the pairs.

When there is a trapping of radioactive solar wind particles in bands by the earth's magnetosphere, it becomes dangerous to travel in space through the Van Allen. Cosmic rays and solar particle add up to the additional hazards that it poses. A Van Allen radiation belt is known to be a zone  where energetic charged particles are found. Most of the energetic charged particles originate from the solar wind.  The solar wind  are captured by and held around a planet by that planet's magnetic field.

When the solar wind interacts with the earth's atmosphere, there is a collision of atoms of oxygen and nitrogen from the earth's atmosphere. The energy that is formed is a colorful glowing halo which is known as an aurora.

Answer:

Cause: Earth’s magnetosphere traps radioactive

solar wind particles in bands around Earth.

Effect: Space travel through the Van Allen

belts is dangerous.

Cause: Earth is surrounded by a magnetic field.

Effect: Solar wind deflects toward the poles.

Cause: Solar wind particles interact with Earth’s

upper atmosphere.

Effect: An aurora is created.

I got it right for Plato :)

Answer:

Density dependant limiting factor

Explanation:

Answer:

.3 m/sec

Explanation:

Cell Membranes,Ribosome, Cytoplasm are used to make protein

Explanation:

Proteins are formed in a condensation reaction when amino acid molecules join together and a water molecule is removed. The new bond formed in protein molecules where amino acids have joined (-CONH) is called an amide link or a peptide link.

hope it will help you

Answer:

The slope between the red points is 2/4 (simplified it is 1/2). The slope between the green points is 4/8 (simplified it is 1/2). This shows that by taking ANY two points on the line, you will find the same slope.

Answer:

The answer is your first choice listed/ plant species etc..photosynthesis...

Answer:

about 73%

Explanation:

Answer:

About 75% of the brain is made of water.

Answer:

66.7 percent.

Explanation:

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%

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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Answer:

It's C. Plants produce oxygen and nutrients via a process known as photosynthesis using water and carbon dioxide

Answer:

The circulatory system is extremely important in sustaining life.

Explanation:

Hope this helps, sorry if incorrect

Answer: Plants, unlike animals, can make their own food. They do this using a process called photosynthesis . During photosynthesis, plants produce glucose from simple inorganic molecules - carbon dioxide and water - using light energy.

Answer:

of molecules to an area of lower concentration

Answer:

20, Im not completely sure tho

Explanation:

Answer: Well, deforestation is cutting down trees, and many arboreal animals live in those trees. So if they have no proper shelter, they would have no place for personal activities such as breeding, feeding etc. And without those important activities that they have to do everyday, the population of arboreal animals will keep on decreasing until they go extinct. Though that's not the only problem. The herbivores won't get anything to eat, hence not letting the omnivores or carnivores get their food. As you can see, deforestation can create a huge environmental imbalance.

The flow of energy in the terrestrial ecosystem is initiated by the sun and its flows to plants and then animal life and finally reaches the decomposers. Thus the option A is correct.

An ecosystem is an ecological unit and its function is to balance the flow of energy in the environment. The flow of energy is unidirectional and as energy flow in one direction, it cannot be destroyed completely as it changes its form.

The energy that is received from the sun is transferred to the green plants, they include this energy to animals that are producers to consumers that include primary consumers and secondary consumers to decomposers, and then this energy leaves the system.

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Answer:

the correct answer is D!

A spore grows into a mature gamete-producing plant.

Explanation:

hope this helps :)

A spore grows into a mature gamete producing plant is best describe the life cycle of fern.

The life cycle of the fern has two different stages such as sporophyte and gametophyte. The sporophyte stage which releases spores whereas gametophyte stage which releases gametes. Gametophyte plants are haploid whereas sporophyte plants diploid. This type of life cycle is known as alternation of generations.

So we can conclude that a spore grows into a mature gamete producing plant is best describe the life cycle of fern.

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Answer:

Glycolysis is the process in which one glucose molecule is broken down to form two molecules of pyruvic acid science my fav class btw thats how i know it

Explanation:

Answer:

1 in 4 so 25% ---------------

Explanation:

Because dense minerals are heavier and drop to the stream bottom, lighter minerals are carried along in the current of the stream. Why do you think that mining on land is less costly than mining in the deep ocean is? It is easier to get to land than the ocean and you need special equipment to go under water.

Answer:

the secone option

Explanation:

i just need one more brainliest thanks<3

Answer: The third one

Explanation: It is the third one because scientist have been talking about how there are billions of galaxy's in our universe.    

Answer:

is there more to this question because this doesn't  make sense.

Explanation:

Answer:

Chemical bonds include covalent, polar covalent, and ionic bonds. Atoms with relatively similar electronegativities share electrons between them and are connected by covalent bonds. Atoms with large differences in electronegativity transfer electrons to form ions. The ions then are attracted to each other.

Two of the strongest forms of chemical bond are the ionic and the covalent bonds. Chemical bonds form between two atoms, each with its own electron environment.

Hope it helps!!!

Answer:

the two main types of chemical bonds are:

ionic bonds and covalent bonds.

Answer:

systems

Archaea

Bacteria

Eukarya

Explanation:

The three domain system resulted in dividing all life into three systems, called Archaea, Bacteria, and Eukarya.

Hope this helps! :)

Answer:

drain

Explanation:

thermal is to hear as drain is to water

Answer:

thermal is to heat as dilute is to water