Does seaweed have a nucleus

Answer 1

Yes, well technically the cells of seaweed all have nuclei. Seaweed are in the Domain Eukarya, Eubacteria (Domain Bacteria) and Archeabacteria (Domain Archaea) are prokaryotic meaning that they lack a nucleus and organelles.

Answer 2

A1. Yes, chlorophyll is the thing that makes plants green and is needed in the process of obtaining energy from light.

a2. As you'll know seaweeds come in three broad classes, red, green and brown. The photosynthesis chemicals in these classes are different and do not necessarily involve chlorophyll.

Have a crack at Algae in Wikipedia for detailed information.

It is probable that all green plants descended from the green seaweeds.

Some deep sea organisms do not require light for their processes - many of these live near Black Smokers, and may rely on a sulfur mechanism as the driver of their life processes. It is possible that these are candidates for the origin of life on Earth.

Answer 3

Yes, they produce their own food just like terrestrial plants