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2 years ago

A habitat that receives little or no precipitation will most likely be suitable for organisms that -

2 answers:

6 0

Store large quantities of water internally. Sunlight is not always a requirement- but less water = more water that needs stored. Think - succulents, for example. Succulents live in mid - low shade and store water because they live in an environment with little precipitation

Your answer is C- Store large quantities of water internally

photoshop1234 [79]2 years ago

5 0

I know you might know this but do not click the link that the other person sent, it could lead to a site with viruses/inappropriate content/etc.

The answer is most of the day in the sunlight, I know this because if you think about the other ones they just don’t make since for this environment. Being covered with fur in a hot environment would not be suitable. Storing water internally would be nice for a desert but there is most likely lakes so that wouldn’t be too useful. And hibernating for long periods time, once again, does not really matter because there are many animals in different climates that hibernate so not knowing the animal we can’t say for sure that it would be.

I hope this helps! <3

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(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps deter

Viefleur [7K]

Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport. 

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There are three main different types of transport across the membrane

Simple diffusion ⇒ Does not need energy to occur
Facilitated transport ⇒ Does not need energy to occur
Active transport ⇒ Needs energy to occur

Active transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.

Molecules move from the lower concentration side to the higher concentration side of the membrane.

Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.

In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.

The cells maintain a 120 mM intracellular concentration of substance L.

Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).

Table 1. Rate of entry of substance L into mammalian cells in culture

External concentration of substance(mM) Rate of entry of substance L

10 5%

20 25%

30 45%

40 65%

50 80%

60 90%

70 95%

80 100%

90 100%

100 100%

Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.

We know that the intracellular concentration is 120mM.

As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.

As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.

Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.

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3 years ago

Why doesn’t dr. logan feel the bed bug feeding on him?

Nastasia [14]

Answer:

Why doesn't Dr. Logan feel the bed bug feeding on him? The bed bug injects an anesthetic as it feeds. Bed bugs prefer humans over other hosts. Many blood-feeding parasites carry diseases but bed bugs do not.

Explanation:

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2 years ago

if there is no oxygen during the cellular respiration process, the Krebs cycle does not occur. True or False

Veseljchak [2.6K]

The answer is gonna be false

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3 years ago

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Which of the following statements is true about viruses?

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