growth rings

growth rings: to determine how old the tree is

fish:

Population

parasitism:

bird

reptile

birds

Amphibian:

Gymosperm

mushroom 

keratin

Batesian Mimicry

Batesian Mimicry

1. mimicry in which an edible animal is protected by its resemblance to a noxious one that is avoided by predators.

   
   

   SNAKE:

   
   

moss

moss:Mosses are small flowerless plants that typically grow in dense green clumps or mats, often in damp or shady locations