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4 years ago

Which best describes a bird’s role as it eats seeds?

Biology

1 answer:

DedPeter [7]4 years ago

6 0

They use their beaks and they push down really hard to stick it

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Ncgivivivibhibobojojhobihi

Paha777 [63]

Answer:

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Explanation:

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3 years ago

Why does the DNA need to be extracted from a cell before it can be analyzed?

Arada [10]

Answer:

<em>To study the genetic causes of disease and for the development of diagnostics and drugs. And detecting bacteria and viruses in the environment and for determining paternity.</em>

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3 years ago

Which statement best describes a keystone species

Nikolay [14]

It has a strong influence on the ecosystem

7 0

3 years ago

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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

Use the model below to answer question #5.

Allushta [10]

Answer:

there are many consumers in the food web, such as the locust, hawk, leopard, scorpion and tick bird, but if you just have to identify one, i would say the impala

Explanation:

6 0

4 years ago

Read 2 more answers