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Komok [63]
3 years ago
7

Earthworms, like the one seen here, live in soil. Bennie wondered how changes in the moisture content of the soil would affect t

he movement of worms. He wanted to design an experiment to test his idea. What would be Bennie's manipulated variable in the experiment?
Biology
2 answers:
Triss [41]3 years ago
7 0
Moisture is the manipulated variable.
Sliva [168]3 years ago
6 0

Answer:

Moisture of the soil

Explanation:

The manipulated variable would be moisture of the soil. Bennie will change the moisture content of the soil to investigate to see of the worm will move in a certain moisture. The movement of the worm is the responding variable.

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no inpossible

Explanation:

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A) Compare and contrast diffusion, passive transport (diffusion & 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
What happens when the area in which you live tilts away from the sun?
Alenkinab [10]

Answer:

It's winter in your area. (b)

Explanation:

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How does carbon dioxide affect the ecosystem
FrozenT [24]

As a greenhouse gas that absorbs heat, CO2 raises the temperature of the atmosphere. We refer to this as global warming. The glaciers will melt more quickly as the world's temperature rises, raising sea levels and bringing on disaster. More power is consumed for air conditioning as the temperature rises, which further raises the air's CO2 level.

Since coal is the primary fuel utilized in the creation of power. This creates a vicious cycle.

3 0
2 years ago
Why do you think fish would have more phosphorus than cows?​
GREYUIT [131]
<h2>Yes, Fish have more phosphorus than cow</h2>

<em><u>Explanation:</u></em>

<h3>Phosphorus can be found in foods (organic phosphorus) and is naturally found in protein-rich foods such as meats, poultry, fish, nuts, beans and dairy products</h3>

<h2>MARK ME BRAINLIST</h2>
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2 years ago
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