AP Biology

A long day plant is a plant that only grows after being exposed to light periods longer than certain critical lengths. For example summer le...

Lichen is a symbiotic collective formed by the mutualistic association between a fungus and a photosynthetic alga or cyanobacterium. Algae i...

Homeostasis is a system to maintain internal stability. For example when a body is cold it shivers which I have pictured above is my little ...

A gymnosperm leaf is the needles that produce the gymnosperm cone they are broad flat and pokey needles. They usually don't fall off in ...

A gymnosperm cone is a plant whose seeds are not enclosed by a ripened ovary for example a pinecone

Species all have certain genetic variations, or differences within a population. This variation allows a more diverse set of individuals to ...

Pollen is a powder that contains the reproducing part of the plant. Pollen has to be spread around and that is why I have a picture of a hum...