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3 years ago

PLZZZ HELP ASAP THANKS :))))

Biology

1 answer:

Tatiana [17]3 years ago

3 0

Answer:

I think it is Physical change

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What is DNA and how does it replicate

Natalka [10]

Answer:

DNA is a self-replicating material

Explanation:

Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.

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2 years ago

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Which of the following would most likely have the greatest lasting effect on an ecosystem ?

r-ruslan [8.4K]

Answer:

change to the landscape from construction

Explanation:

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4 years ago

How can heredity and the environment interact to influence the cell cycle?

-BARSIC- [3]

From the earliest moments of life, the interaction of heredity and the environment works to shape who children are and who they will become.

The complex interaction of nature and nurture does not just occur at certain moments or at certain periods of time; it is persistent and lifelong.

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3 years ago

A spheroidal bacterium with a diameter of 1 mm contains 2 molecules of a particular protein. What is the molar concentration?

creativ13 [48]

Answer : The molar concentration is, $6.35\times 10^{-18}mol/L$

Explanation :

First we have to calculate the moles of protein.

$\text{Moles of protein}=\frac{\text{Number of molecules of protein}}{\text{Avogadro's number}}$

Number of molecules of protein = 2 molecules

Avogadro's number = $6.022\times 10^{23}molecules/mol$

$\text{Moles of protein}=\frac{2\text{ molecules}}{6.022\times 10^{23}molecules/mol}=3.32\times 10^{-24}mol$

Now we have to calculate the radius.

Radius = $\frac{Diameter}{2}=\frac{1mm}{2}=0.5mm=5.0\times 10^{-4}m$

Conversion used : (1 mm = 0.001 m)

Now we have to calculate the volume.

$V=\frac{4}{3}\pi r^3$

$V=\frac{4}{3}\times 3.14\times (5.0\times 10^{-4}m)^3$

$V=5.23\times 10^{-10}m^3=5.23\times 10^{-7}L$

Conversion used : (1 m³ = 1000 L)

Now we have to calculate the molar concentration.

$Concentration=\frac{\text{Moles of protein}}{\text{Volume}}$

$Concentration=\frac{3.32\times 10^{-24}mol}{5.23\times 10^{-7}L}$

$Concentration=6.35\times 10^{-18}mol/L$

Thus, the molar concentration is, $6.35\times 10^{-18}mol/L$

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3 years ago

What does fungi mean?

Anna11 [10]

Fungi is the plural of fungus.
Fungus is any of a group of unicellular, multicellular, or syncytial spore-producing organisms feeding on organic matter, including molds, yeast, mushrooms, and toadstools.

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3 years ago