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bekas [8.4K]
3 years ago
15

PHYSICAL SCIENCE !! please help <3

Biology
1 answer:
8090 [49]3 years ago
6 0

Answer:

C. A law describes the observation, while the theory explains the how or why.

Explanation:

So in general science, an observed phenomenon is the description of the scientific law. However the explanation of the phenomenon is called a scientific theory. Which would make this answer: c.   A law describes the observation, while the theory explains the how or why.

Hope this helps!

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A) Compare and contrast diffusion, passive transport (diffusion &amp; facilitated), primary active transport and secondary activ
zheka24 [161]

Answer:

<u>Passive transport</u>: It does not need any energy to occur. Happens in favor of an electrochemical gradient. Simple diffusion and facilitated diffusion are kinds of passive transport.

<u>Simple diffusion</u>: molecules freely moves through the membrane.

<u>Facilitated diffusion</u>: molecules are carried through the membrane by channel proteins or carrier proteins.

<u>Active transport</u> needs energy, which can be taken from the ATP molecule (<u>Primary active transport</u>) or from a membrane electrical potential (<u>Secondary active transport</u>).

Explanation:

  • <u>Diffusion</u>: This is a pathway for some <em>small polar hydrophilic molecules</em> that can<em> freely move through the membrane</em>. Membrane´s permeability <em>depends</em> on the <em>size of the molecule</em>, the bigger the molecule is, the less capacity to cross the membrane it has. Diffusion is a very slow process and to be efficient requires short distances and <em>pronounced concentration gradients</em>. An example of diffusion is <em>osmosis</em> where water is the transported molecule.
  • <u>Facilitated diffusion</u>: Refers to the transport of <em>hydrophilic molecules</em> that <em>are not able to freely cross the membrane</em>. <em>Channel protein</em> and many <em>carrier proteins</em> are in charge of this <em>passive transport</em>. If uncharged molecules need to be carried this process depends on <em>concentration gradients</em> and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an <em>electrochemical gradient</em>. The <em>glucose</em> is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.

<em>Simple diffusion</em> and <em>facilitated diffusion</em> are <u>passive transport</u> processes because the cell <u><em>does not need any energy</em></u> to make it happen.

  • <u>Active transport</u> occurs <em>against the electrochemical gradient</em>, so <u><em>it does need energy to happen</em></u>. Molecules go from a high concentration side to a lower concentration side. This process is always in charge of <em>carrier proteins</em>. In <u>primary active transport</u> the <em>energy</em> needed <em>comes from</em> the <em>ATP</em> molecule. An example of primary active transport is the <em>Na-K bomb</em>. In <u>secondary active transport</u>, the<em> energy comes from</em> the <em>membrane electric potential</em>.  Examples of secondary active transport are the carriage of <em>Na, K, Mg metallic ions</em>.
7 0
3 years ago
HELP I NEED THE CONCLUSION TO THE CRICKET FROG EVERGLADES LAB!!!! PICTURES ARE BELOW!! WORTH 100 POINTS HELP!!!!
shepuryov [24]

Answer:

Ummm I am doing the same assignment as you so I do not even know it lol

Explanation:

6 0
2 years ago
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How do sponges eat? Also, I don't know what subject this falls under....soo
Alja [10]
With a mouth because yeah
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3 years ago
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Heterotrophs are organisms that consume other organisms in order to gain energy. Compare two different categories of heterotroph
Rina8888 [55]

Both primary (herbivores) and secondary (carnivores and omnivores) consumers are heterotrophs, while primary producers are autotrophs. A third type of heterotrophic consumer is a detritivore. These organisms obtain food by feeding on the remains of plants and animals as well as fecal matter.

7 0
3 years ago
Which of the following is not an example of active transport? I. Facilitated diffusion II. Osmosis III. Diffusion
klasskru [66]
I. Facilitated diffusion is your answer. 
Active transport <span>is the movement of molecules across a cell membrane into a region of higher concentration, this process requires energy. Both osmosis and diffusion are passive transportations which means that they don't require energy.
Hope this helps!
</span>
6 0
3 years ago
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