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butalik [34]
3 years ago
12

What are the characteristics of either porosity or permeability?

Biology
1 answer:
stellarik [79]3 years ago
4 0

Answer:

In this case, here are the options to complete the question

A. Porosity is a measure of the amount of the substance composed of empty spaces.

B. Permeability is the same thing as secondary porosity.

C. Permeability is a measure of how well the pores are connected.

D. Porosity describes the ability of pores to form conduits through the material

The ANSWER IS SURELY

A. Porosity is a measure of the amount of the substance composed of empty spaces.

C. Permeability is a measure of how well the pores are connected.

Explanation:

Porosity is used to estimate the amount of a rock that is open space between grains or within cracks or rock cavities.

Permeability is the ease of which water moves through a porous rock.

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Hello! If one bee makes 1/12 teaspoon, then half a teaspoon is 6/12 of honey. The answer is six because 6(1/12) is 6/12. I hope this helps! Feel free to rate my answer.
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3 years ago
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In a dichotomous classification system, __________.
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b) A population first divided into two parts, then three parts, and then four parts, until a description identifies a single member.

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6 0
2 years ago
DCCD (dicyclohexylcarbodiimide) inhibits oxidative phosphorylation when the substrate is mitochondrial NADH. DCCD is a drug that
VARVARA [1.3K]

Answer:

A) Decreases cellular energy production

B) DCCD also affects K+ transport

Explanation:

A) Consequences are of DCCD on cellular energy production: <em>Decreases cellular energy production</em>

ATP-synthase pump is composed of two subunits: F1 catalytic subunit that synthesizes ATP, and F0 proton pumping subunits, that transport H+ through the membrane. F1 subunit might act independently of F0 to produce ATP, but this molecule can not be released without H+ gradient, which generates a movement necessary for ATP release from the catalytic center.

When any of the parts composing F0 react with DCCD, the subunit can not transport H+ through the membrane. DCCD inhibits the enzyme activity by blocking the protons´ flow.

As DCCD blocks the protons´ flow, and the protons´ flow is necessary to release the ATP molecule from the F1 subunit, no other ADP + Pi can enter to F1 subunit, and the production of ATP stops.

B) Other cellular effects of DCCD

There seem to be other effects of DCCD on cell activity, some of which are still under study. To name a few:

  • Diimide from DCCD seems to stimulate cytochrome b reduction and inhibits its reoxidation by ferricyanide.
  • When exposing the cell to high concentrations of DCCD for a long time, might occur an alteration in the electron transporting chain
  • Inhibition of ubiquinol-cytochrome c reductase activity when exposing the cell to high concentrations of DCCD.
  • Inhibition of K+ transport, associated with the inhibition of H+ transport.

Concerning the effect of DCCD on the K+ transport, DCCD stops the extrusion of H+ and the consequent intrusion of K+.

DCCD strongly inhibits the simultaneous flow of H+ and K+. First, it inhibits H+ flow, acidification of the environment stops, but at this point, K+ keeps moving through the membrane. Once the H+ flow has ceased, the K+ flow slowly decreases until it finally stops moving. There is a lag time in the DCCD effect on K+ flow to the instantaneous effect on H+ flow.

5 0
3 years ago
Cholesterol is a ________, which ________. steroid; is a component of eukaryotic membranes steroid; is the basis for many animal
olasank [31]

Answer:

Steroid; is a component of eukaryotic membranes.

Explanation:

Cholesterol is one of the most important chemical synthesized by all the animals. The chemical formula of cholesterol is C27H46O. The cholesterol in solid state was first given by C27H46O.

Cholesterol is present in the plasma membrane and maintain its membrane fluidity. Cholesterol is an important structure of the plasma membrane and acts as a pre cursor for various hormone. The cholesterol is a type of sterol and a lipid.

Thus, the correct answer is option (1).

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Example answer number one

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