Which of these is an organism?
herd of sheep
wolf
drop of water
heart

singular it is a wolf plural it is herd of sheep

but both are correct

wolf

Explanation:

An organism is an individual animal, plant, or single-celled life form.

The herd of sheep is more than one so that's cancelled out.  A drop of water is not a plant, animal, or alive so that's cancelled out.   A heart can beat but it's the human's body as a whole that lives and runs so that's canceled out.  Leaving the only option 'wolf' to fit the criteria of being an organism.

Thank you for letting me help you! If you have any more questions, I will gladly provide the most brainiest answers.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: