The answer would be <span>"A niche is the role an organism has in an ecosystem."</span> Because a niche is the position or 'job' an
organism has in an ecosystem. For example, the niche of certain
butterflies and bees is to pollinate flowers in an ecosystem which
allows them to reproduce.
We do not use carbon dioxide to fuel our blood cells. It is a waste.
Arteries move blood from the heart to the rest of the body.
Veins carry the blood to the heart to be oxidized.
"D" is not correct.
"B" is not correct.
We know that veins carry blood to the heart, lungs exhale carbon dioxide.
"A" is the correct answer.
I hope this helps!
~kaikers
Answer:
Taxonomy
Explanation:
Taxonomy is the science of naming, defining and classifying groups of biological organisms on the basis of shared characteristics.
The principal ranks in modern use are domain, kingdom, phylum, class, order, family, genus and specie
Newton proved that the force that causes, for example, an apple to fall toward the ground is the same force that causes the moon to fall around, or orbit, the Earth. This universal force also acts between the Earth and the Sun, or any other star and its satellites. Each attracts the other.
Answer:
Explanation:
1) Excitation brings about contraction.
2) Contraction leads to an increase in blood pressure.
3) Changes in blood pressure results in the opening and closing of the heart valves.
4) The opening and closing of heart valves then regulates the flow of blood and it's volume.
