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anastassius [24]
3 years ago
10

I NEED HELP IM SO CLOSE TO PASSING!​

Biology
2 answers:
d1i1m1o1n [39]3 years ago
6 0

Answer:

That is the cell membrane

Explanation:

The cell membrane is semipermiable so it can allow certain molecules to move between the membrane. That way the cell gets the necessary nutrients.

vagabundo [1.1K]3 years ago
4 0

Part one is a semi-permeable membrane that separates the two solutions and allows bi-directional transport

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How do some people end up crazy and some of the things that make people crazy make others stronger
pantera1 [17]

Answer:

Everyone is raised differently, some people are used to handling certain situations better than others. For example, if someone is raised in an area with lots of sunlight and warm temperature and they decide to move to somewhere cloudy and cold when they grow up, the dramatic difference between temperatures could make this person 'crazy' and unable to adapt to simple situations in this climate, regardless of how easy it is to handle for others. This could be a metaphor for many situations.

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4 years ago
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Assume that a single layer of phospholipids coat the water in a beaker. which part of the phospholipid molecule will face the ai
jek_recluse [69]
The part of the phospholipid molecule that will face the water, as it is labelled to be hydrophilic would be the polar phosphate group. The correct response would be A.
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3 years ago
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2. A man with type B blood mamies a woman with type A blood. Their first child has type o blood. The couple says this is
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Blood types:

AB +

AB -

A +

A -

B +

B -

O +

O -

It is possible to have a child with O blood despite the parents having different blood types.

While the man tested for B blood, he could have been a combination between type o and B whereas, the woman was a combination of type A and o. Since A/B are dominant, they would 'stand out' contrarily to o.

This means that their children could have AB or O blood.

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3 years ago
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You have decided to determine how many microbes are living on the lettuce in the salad bar at your favorite restaurant. You plac
REY [17]

Question is incomplete. Complete question is as follows:

You have decided to determine how many microbes are living on the lettuce in the salad bar at your favorite restaurant. You place 1 gram of lettuce and 99 mls of water in a blender and blend the mixture. This is sample A. You then transfer 1 ml of this dilution into to another that contains 9 mls of water. This becomes sample B. You next transfer 1 ml of sample B into a separate container that contains 9 mls of water. This is sample C. Next you transfer 1 ml each from samples B & C onto separate nutrient rich agar plates, swirl, let harden and incubate at 37C. When you examine the plates after 48 hours you find 110 colonies growing on plate C. How many microbes were living on that 1 gram of lettuce?

Answer:

1.1x10^6 microbes

Explanation:

When 1gm of lettuce is mixed with 99 ml of water, the microbe concentration is diluted 100 times (Sample A). 1 ml of sample A is mixed with 9ml of water to make sample B which further dilutes microbe concentration 10 times making the total dilution 1000 times. This process is repeated with sample B to make sample C increasing the dilution to 10000 times.

110 colonies are counted from this sample C. Each colony signifies a single microbe during plate counting method. So, 110 microbes were present on the plate. Original number of microbes = microbes counted * times of dilution =

110 * 10000 = 1100000 = 1.1x10^6 microbes

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They use bubbles.

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