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Nimfa-mama [501]
3 years ago
8

Think of an object, person, or place at home that functions similar to the cell membrane.

Biology
2 answers:
lawyer [7]3 years ago
8 0

Answer:  A sponge, screen door, your wall, window & door of your house.

spayn [35]3 years ago
4 0

i think its a plant or dog since both of them also have cells

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What is the function of the eight major structures of a plant cell
otez555 [7]

Answer:

plant cell

Explanation:

1.cell well-protected and provides structural support of cell

2.cell membrane regulates entries and entries of substances within the cell.

3.nucleus stores DNA

4.plastids they store starch help in photosynthesis

5.chloroplast pigment which protect cell

6.vacuole sustain turgid pressure against cell wall

7.mitochrondria provide energy to help break carbs

8.lysosome help with cellular waste disposal

5 0
3 years ago
If 1/8 remains after 21 years, what is the half-life?
vagabundo [1.1K]

Half life formula

The number of unstable nuclei remaining after time t can be determined according to this equation:

N(t) = N(0) * 0.5^(t/T)

where:

N(t) is the remaining quantity of a substance after time t has elapsed.

N(0) is the initial quantity of this substance.

T is the half-life.

It is also possible to determine the remaining quantity of a substance using a few other parameters:

N(t) = N(0) * e^(-t/τ)

N(t) = N(0) * e^(-λt)

τ is the mean lifetime - the average amount of time a nucleus remains intact.

λ is the decay constant (rate of decay).

All three of the parameters characterizing a substance's radioactivity are related in the following way:

T = ln(2)/λ = ln(2)*τ

How to calculate the half life

Determine the initial amount of a substance. For example, N(0) = 2.5 kg.

Determine the final amount of a substance - for instance, N(t) = 2.1 kg.

Measure how long it took for that amount of material to decay. In our experiment, we observed that it took 5 minutes.

Input these values into our half life calculator. It will compute a result for you instantaneously - in this case, the half life is equal to 19.88 minutes.

If you are not certain that our calculator returned the correct result, you can always check it using the half life formula.

8 0
3 years ago
Large populations of tortoises inhabited the Galapagos Islands before humans. When humans settled on the islands and introduced
sertanlavr [38]

Answer:it reached carrying capacity. the environment couldn't hold both the goat and tortises

Explanation:

3 0
3 years ago
Which statement is false about fungi?
alekssr [168]

Answer:

C) Most fungi get their nutrients by ingesting small pieces of other living organisms.

Explanation:

Most fungi are saprotroph, it is, they obtain  nutrients by decomposing  non-living organic matter -i.e.  dead plant or animal matter-  and absorbing soluble organic compounds; carbohydrates are the preferred carbon source.

A smaller percentage of fungal species are parasites, and obtain nutrients from living hosts (other living organisms).

7 0
3 years ago
In C3 plants the conservation of water promotes _____.
bija089 [108]

Answer:

The correct answer is d. photorespiration

Explanation:

In the C3 plant, the Rubisco enzyme is important that fix CO2 into organic molecule by binding with CO2. Rubisco can also bind to oxygen when the oxygen concentration increases in cells which leads to the loss of fixed CO2  and waste of energy which is called photorespiration.

So when stomata are open CO2 comes in and O2 goes out of the cell which maintains the high CO2 concentration in the cell but during hot days C3 plants close stomata to prevent water loss.  

So closing of stomata decrease the intake of CO2 and increase the oxygen concentration inside the cell. So in increased temperature and high oxygen concentration, the rubisco enzymes bind to O2 and promote photorespiration.

3 0
3 years ago
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