Big Idea 1

2. Adaptation of an animal: Over time, animals adapt to survive in different environments and conditions. The flamingo has several adaptations, the most notable of which is its long legs. It adapted this ability so as to be able to stand in deeper waters and better fish for food in the water.

3. Adaptation of a plant: Plants also adapt to better survive in their respective environments.This rose bush has adapted small thorns along its stems so as to prevent and deter animals from potentially eating and disturbing it.

4. Amniotic egg: The amniotes are a group of tetrapods that have an egg equipped with an amnios, an adaptation to lay eggs on land rather than in water as anamniotes do.This egg comes from a chicken, which is an amniote.

5. Analogous Structure: Analogous structures are features of two different species that are similar in how the function, but the structure of the two features is different. The wing of a seagull is analogous to the wing of a butterfly in the way that it is used for a similar function but is not the same thing structurally.

6. Angiosperm: Angiosperms are the most diverse kind of land plants and contain over 300000 different species. Angiosperms are flowering plants. This Rose French Lace is an angiosperm because of its ability to flower.

8. Arachnid: Arachnids are any of various arthropods of the class Arachnida, such as spiders, scorpions, mites, and ticks, characterized by four pairs of segmented legs and a body that is divided into two regions, the cephalothorax and the abdomen. They are also called arachnoid. This is a picture of a spiderweb, which is the direct byproduct of a spider. Spiders use these web filaments as homes and places to catch prey for food.

10. Arthropod: An arthropod is an invertebrate animal having an exoskeleton, a segmented body, and jointed appendages. This desert tarantula represents an arthropod because of its exoskeleton, segmented body, and jointed appendages.

11. Artificial Selection: Artificial selection is the process by which humans breed other animals and plants for particular traits. These two shih-tzus represent artificial selection because humans have bred them over time to display their characteristic colors and traits, such as the short noses and long fur,

12. Bilateral symmetry: Bilateral symmetry is a type of symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so that only one plane can divide the individual into essentially identical halves. This Great Hornbill represents bilateral symmetry because its anatomical parts are arranged evenly about an axis. 

20. Fungi: A fungus is a member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. The white mold growing on this plant represents fungi because it, being mold, is a sub-category of the fungus family.

22. Genetic Variation: Genetic variation describes the ability and trait of organisms to have different genetic makeups between individuals of a certain species. Giraffes represent genetic variation because each giraffe is only as tall as its individual genes allow it to be, and because of genetic variation each giraffe is individually tall. 

23. Gnathostome: The gnathostomata are the jawed vertebrates. This spectacled caiman represents the gnathostomata because of its massive jaw which it uses for eating.

24. Gymnosperm Cone: The gymnosperms are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and Gnetales. This is a picture of a gymnosperm cone from a conifer tree, which bears the seeds of the tree itself. 

25. Gymnosperm leaf: Gymnosperm seeds develop either on the surface of scales or leaves, often modified to form cones, or at the end of short stalks as in Ginkgo. This gymnosperm leaf from a pine tree is an example of where a gymnosperm cone would develop from.

26. Homologous structure: Homologous structures are derived from a common ancestor or same evolutionary or developmental origin. The tibia in this crow's wings are homologous structures to the tibiae in other animals, such as horses and humans. 

28. Modified leaf of a plant: Plants often become modified to better suit themselves to their environments. The leaves of this dracanae fragans have become modified with spiky tips so as to better survive in its respective environments. 

38. Seedless vascular plant: Pteridophytes or Pteridophyta, in the broad interpretation of the term, are vascular plants that reproduce and disperse via spores. This Boston Fern is a seedless vascular plant in the sense that it has a vascular system but reproduces by spores and not via seeds.

39. Tetrapod: The superclass Tetrapoda, or the tetrapods, comprises the first four-limbed vertebrates and their descendants, including the living and extinct amphibians, reptiles, birds, and mammals. This thick billed parrot is a tetrapod because it has four distinct limbs (two legs and two wings).

40. Unicellular Organisms: Unicellular organisms are organisms that only comprise of one individual cell. These organisms are abundant in water-filled areas such as this one, where they can often come across nutrients.

41. Vestigial Structures: A vestigial structure in an organism is a structure that has lost all or most of its original function in the course of evolution. The human appendix is probably the most well-known vestigial structure because it practically does very little in the human body and can be removed without permanent damage to the human body.