All categories

3 years ago

What is one evolutionary advantage pteridophytes have over bryophytes?

1 answer:

8 0

Pteridophytes are a vascular plant and since bryophytes have no vascular system they are not capable to transport the water and nutrients from one part of the plant to another but Pteridophytes can.

You might be interested in

What is a strength in the figure?

Arlecino [84]

The figure shows where mitosis occurs in the cell cycle. after the interphase

4 0

3 years ago

Read 2 more answers

Palm oil and coconut oil are more like animal fats than are other plant oils. Because they _____ than other plant oils, they may

Tamiku [17]

Answer:

contain fewer double bonds

Explanation:

Palm oil and coconut oil are more like animal fats than are other plant oils. Because they contain fewer double bonds than other plant oils, they may contribute to cardiovascular disease.

The more the double bonds the more it can react with other compounds to form a single bond which will reduce risk of cardiovascular disease

4 0

2 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, $6.35\times 10^{-18}mol/L$

4 0

3 years ago

Why are plants and the bottom of the energy pyramid?

nataly862011 [7]

Answer:

What is an energy pyramid?

An energy pyramid is a graphical model that shows energy flow in a community. In this case thought, it shows how energy flows in a biome.

Why do the percents decrease as you get to the top of the pyramid?

The plants at the bottom of the pyramid have the most energy because they are the producers of the biome. They take the sun rays and use photosynthesis to make food and turn that into energy for animals. Herbivores have to move around to find their food. Finding food takes energy so that's why they have less amount of energy. Another reason is because they have to chew and swallow their food. Their digestive system has to use energy to break down the food molecules and get the essential nutrients out of the plant for the herbivore. The carnivore has the least amount of energy because they have to track their prey. Moving around requires a lot of energy. Also by the time the carnivore attacks the herbivore, they're already digesting the energy and nutrients from the plants so there's less of those left.

5 0

3 years ago

Read 2 more answers

Mendel studies seven different traits in the garden pea. what genetic term is used to describe an observable trait, such as thos

Ivanshal [37]

<span>The genetic term used to describe an observable trait is phenotype. More specifically phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.</span>

5 0

3 years ago