AP Bio Scavenger Hunt #4

Heterotroph: (Robin) an organism that obtains organic food molecules by eating other organisms or substances derived from them. Birds such as this robin are classified as heterotrophs because of their diet of small bugs, seeds and worms.

Bilateral symmetry: (orange butterfly) body symmetry in which a central longitudinal plane divides the body into two equal but opposite halves. This orange butterfly on the forest floor has perfect bilateral symmetry, with both wings being the mirror of each other.

Animal that has a segmented body: (black ant) The tiny ant shown here is an example of an arthropod (an animal) with a segmented body. All arthropods, which include lobster, millipedes and scorpions, have segmented bodies. The segments are throughout the body and group together to perform functions such as nervous or respiratory processes. Ants are segmented in three parts: head, thorax, and abdomen.

Gymnosperm leaf: (pine tree branch) Gymnosperm leaves produce gymnosperm cones directly from the branch, due to the lack of flowering capability. These type of plants produce "naked seeds" such as pine cones, which lack any covering like seeds of a flower would need.

Ectotherm: (pill bug) organisms for which external sources provide most of the heat for temperature regulation. It's a bit difficult to see but the round, dark thing next to the heart is a small brown pill bug, an example of an ectotherm.

Ovary: (apple) (1) In flowers, the portion of a carpel in which the egg-containing ovules develop

(2) In animals, the structure that produces female gametes and reproductive hormones. Apple ovaries house the apple seeds in the core of the apple, as shown here in this green apple.

Endosperm: (apple seed) In angiosperms, a nutrient-rich tissue formed by the union of a sperm with two polar nuclei during double fertilization. The endosperm provides nourishment to the developing embryo in angiosperm seeds. The picture shows the brown casing covering the white endosperm on the inside of the seed, but the casing was cut off the seed to reveal the endosperm and other food storage structures that nourish and protect the young seed.

C3 plant: (potato) a plant that utilizes the C3 carbon fixation pathway as the sole mechanism to convert CO2 into an organic compound containing three carbon atoms before entering the Calvin Cycle of photosynthesis. 

Modified leaf of a plant: (spiny plant) This plant has adapted to its environment by growing specialized leaves to ward away harmful insects and protect its soft green foliage. The leaves have long fluffy hairs that stick to hairs on bug limbs and there are many large spikes texturing the leaf, making the whole leaf extremely difficult to walk, on thus undesirable to eat.