Which body systems would be involved in sledding?

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.

Draw a simple labelled diagram if a collenchyma tissue