Answer:
A
Explanation:
Because its not low it be high
The correct statement is the fourth one. The riverbed erodes into a V-shaped valley while the glacier erodes into a U-shaped valley. Glaciers and rivers have tributaries or small rivers that join the main river. For glaciers, as it erodes deeper, the small river is left higher up the steep sides. For rivers, as it erodes, ridges of land form in its upper course.
Yes. Think of it as a skeletal structure for worms. It's basically what allows them to move.
Answer:
b. chloroplast
Explanation:
Chloroplasts are the double membrane-bound organelles that serve as the site for photosynthesis in eukaryotes. Chloroplasts are the organelles where eukaryotic autotrophs synthesize the organic nutrients by the process of photosynthesis. According to the given information, the first eukaryotic cells were heterotrophs as they derived energy by available organic compounds. They did not synthesize the organic nutrients to use them as fuel. Chloroplasts are not present in heterotrophic organisms such as animals. Therefore, chloroplasts are most likely to have appeared last in the eukaryotic cells.
Answer:
A type of diffusion that happens within membrane
