A keystone species is an organism which has a heavy impact on the environment that it lives in. While this lionfish cannot have much impact in an aquarium, it can be considered a keystone species in its habitat in the Atlantic Ocean. Recently, lionfish have been invasive to the native fish and plants in the… Read more

A gymnosperm is a plant that has its seeds exposed. This includes coniferous plants, such as the pine tree. Shown here are the ‘leaves’ of that gymnosperm, more commonly known as pine needles.

The flower ovary is located directly underneath the flower in the pistil, and cannot be seen without splitting the flower open. The flower ovary is the female organ in a flower. For the above image, the ovary would be located in the yellow and green parts of the flower where it attaches to the stem.