Why can’t we send cactuses to Mars a plant that doesn’t need much water in a dessert environment

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.

D.) domain, kingdom, phylum, class, order, family, genus then species