Plant cells have a cell wall, animal cells don't.
Plant cells have a large central vacuole and animal cells have more numerous, smaller vacuoles.
Plant cells have chloroplasts and animal cells do not.
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Answer:
Examples of renewable energy resourses: solar, water, wind, biomass and geothermal.
Explanation:
Those resources are either:
- limitless: the sun shine is not limited.
- Can be replaced faster than we can use them; a water flow or wind blow are abundant in nature.
Intercalated disks support the synchronized contraction of cardiac muscles
If we take a look at the phylogenetic tree of bears presented in the picture above, we can see that the branch number one is the common ancestor to all living bear species, which means that the whole group has a uniform origin. and the
phylogenetic tree has a root. Therefore, the group is monophyletic, not <span>polyphyletic ( meaning that the whole group has the same origin) and not paraphyletic ( there is no group that has been excluded from the tree).</span>
<span>The nitrogen cycle could not exist without first nitrogen. The cycle is about this specific element which goes to show that if this element is not present then, there will not be any nitrogen cycle. Also, an important factor for the cycle is the presence of the bacteria and other microorganism which are needed for the fixation. </span>