Big Idea 1

2: Adaptation of an animal:
In extreme environments, animals may evolve extraordinary traits. This anteater has developed a long snout so that it can reach into ant tunnels.

3: Adaptation of a plant: The bulb on this onion plant developed so that it could store energy and grow during the winter.

4: Amniotic egg: An amniotic egg is basically an egg laid by a land animal. It has evolved such that its shell is impervious to water, scratches, and other damage. This chicken egg is a great example of an amniotic egg because of its hard shell.

6: Angiosperm: Angiosperms are plants that flower in order to reproduce. This winterberry holly bush is an angiosperm because it produces berries, and therefore flowers in order to reproduce.

8: Arachnid: An arachnid is a joint-legged animal with eight legs and an exoskeleton. This spiderweb has been left by a spider, the most recognizable arachnid.

 12: Bilateral Symmetry: Bilateral symmetry is symmetry in which one can bisect the subject and both halves will be congruent to each other. The flowers in this arrangement can be bisected and both halves will be equal to each other.

 13: Bryophytes: Bryophytes are plants that do not have vascular systems. The way they transmit nutrients and moisture is by osmosis from cell to cell. Bryophytes are usually close to the ground, like this example is.

 16: Coelomates: Coelomates are animals that have a body cavity to hold organs and the digestive tract. This goat is a coelomate.

 19: Eubacteria: Eubacteria is a large subsection of bacteria, which have cell walls, nucleosomes, and can process oxygen. The bacteria in the culture used to produce this milk was most probably some sort of eubacteria, since they are the most common type of bacteria.

 20: Fungi: Fungi are organisms that are plant-like in that they have cell walls, but they do not produce their own food. The mushrooms in this mushroom kebab are fungi.

21: Gastropod: A gastropod is basically any slug or snail. This slug is part of the Gastropod class. This means that it is related to snails and other mollusks.

22: Genetic Variation: Genetic variation occurs when there is a mutation in DNA that causes an organism's phenotype to change. For example, the orchids in this picture are all the same species, but have different flower colors. 

 25: Gymnosperm Leaf: Gymnosperm leaves are usually needle-like in their shape. The fir leaves here are part of a fir tree, a gymnosperm. 

 28: Modified leaf of a plant: A modified leaf of a plant is a leaf that has been modified to perform a task other than photosynthesis or carbon fixation. The aloe leaves on the aloe plants here were modified to contain the plant's 

 29: Modified root of a plant: The vine growing on this wall has grown roots tha help it cling to the wall.

30: Modified stem of a plant: The thorns in the blackberry bush pictured here are actually modified stems, because they are just small stems that protect the plant from herbivores.

 33: Organisms in different plant divisions:

 33-1: The first image is of an orange tree, which is part of the magnoliophyta division. This division includes flowering plants.

 33-2: The second photo, of a redwood shoot, is part of the pinophyta division. This division includes gymnosperms like redwoods, pines, firs, and others.

33-3:   The third photo, of a fern, is part of the pteridophyta division. These plants do not reproduce using seeds, but by using spores.

33-4: The fourth picture, of a moss, is part of the bryophyta division.

37: Radial Symmetry:  Radial symmetry describes an object that is symmetrical no matter what way it is turned. This sunflower plant is radially symmetrical.

38: Seedless vascular plant: The only seedless vascular plants are ferns and liverworts. Ferns like the one above use spores rather than seeds to distribute their offspring.