To keep an elodea alive it needs to be grown under water in a sandy soil. The plant will also need sunlight and lots of space so it can grow.
I think they stay alive for maybe 10-13 yrs.?
10-12 years
Yes they can, sometimes more :)
Roster...probaly...
Yes, sperm can stay alive for about 1-2 days outside of a males body..
They need to stay alive to support the organism
Oxygen is needed to stay alive. Without it you suffocate.
The four thing you need to stay alive are: Oxygen, water, Food, and Air
Enviorment
To stay alive
they need a lot of energy
Yes. An organism is anything that is alive. What constitutes alive? Something that's alive fulfills these 7 requirements: Homeostasis. This means regulating the internal environment. Does Elodea regulate itself? Yes. Organization, or being made up of one or more cells. Elodea is made of cells. Metabolism, or making cells and energy. Does Elodea do this? Yes. Growth. Does Elodea grow? Yes. Adaptation, or being able to change in response to its environment. Can Elodea change in response to its environment? Yes. It will grow towards a source of light. Response to stimuli. Yes, Elodea does respond to stimuli. As mentioned before, it will grow towards light. Reproduction, or producing new organisms. Can Elodea reproduce? Yes. Elodea fulfills all of these conditions; therefore, it is alive and therefore an organism.
breath and crap like that
Water to swim in
to stay alive
The Romans needed water, food and shelter to stay alive just like everyone else.
It does need resources.