Answer:
Increasing the size of the cube-shaped cell increases the volume. However, the surface area-to-volume ratio decreases. This means that the simple diffusion would take more time distribute nutrients across the cell (and even in the eliminate waste). It would need bulk transport such as vesicle transport, otherwise cell activities would slow down.
The <u><em>correct answer</em></u> is:
He needs to select a more representative sample.
Explanation:
Choosing students from the basketball team for the sample he uses on a study of heart rates and exercise will be a biased sample. This is because students on the basketball team are potentially healthier than other students, which means that exercise will not have a large an effect on their heart rate as it would if they were not as healthy and not as physically fit.
In order to reduce the amount of bias, he should choose students from different groups throughout the school.
Answer:
Carbohydrates, such as sugar and starch, for example, are readily broken down into glucose, the body's principal energy source.
Explanation:
Eukaryotic cell
Eukaryotic cells have DNA, and prokaryotic cells do not.
Eukaryotic cells have both membrane-bound organelles and nuclei, while prokaryotic cells have neither
Prokaryotic cell
Prokaryotic cells have membrane-bound organelles, and eukaryotic cells do not.
Prokaryotic cells have nuclus and eukaryotic cells do not.
