Given the statements below, choose the one that is true about one-celled living things. Under normal conditions, yeast produces spores.
The adult stage for one-celled organisms is usually extremely long.
Algae can only be unicellular.
Because of its size, algae does not make much oxygen for the earth.

The adult stage for one-celled organisms is usually extremely long.

Explanation:

The first one is false, I'm no expert, but I'm pretty sure that there is some yeast that don't produce spores, even in normal conditions.

The third is false, Algae can be unicellular and multicellular.

The fourth is false, All the Algae in the world is close to half  of the ogygen in the world.

So that leaves the second, The adult stage is usually long for one-celled organisms.

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

the answer would be a