Since all the blood vessels work together as a whole, the malfunction of one will be affected in a bad way that can stop the flow of oxygen in the blood to reach certain areas of the organism. It also puts at risk for heart attacks, heart failure and strokes and more.
You'd most likely find B) A Chloroplast in a autotrophic protist.
You can figure it out by looking at a sequence of rocks to try to decipher the times that an event occurred relative to the other events represented in that sequence. The relative age of a rock then is its age in comparison with other rocks. If you know the relative ages of two rock layers, (1) Do you know which is older and which is younger? (2) Do you know how old the layers are in years? so yeah séquences haha
Scientists classify organisms to make them easier to study. Taxonomy is very useful to scientists because once an organism is classified they can already learn about it