An ant "aphid farming": a symbiotic relationship between ants and aphids.  Aphids produce honeydew/sugar water from their abdomen which the ants then feed off of.  In exchange, the ants protect the aphids from predators.

The nucleus of a singe frogspawn egg going through the process of cell division.

"Pink Mountains and Green Pastures": an abstract perspective on a water lily.

A mother and her egg sack.