What do you mean by derived unit ? Give example?

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above