Chapter 18

-Organismal

-Population

-Community

-Ecosystem

Addresses populations, groups of individual of the same species living in the same area

-concentrates mainly on factors that affect; population density and growth

Is concerned with communities, assemblages of population of different species

-focuses on how interactions between species affect community structure and organization

Is concerned with the ecosystems, which include all the abiotic/nonliving factors in addition to the community of species in a certain area

-focuses on energy flow and the cycling of chemicals among the various abiotic/nonliving and the biotic/living or life factors

Wrote a book in 1950 (Silent Spring) regarding the harmful effects of a pestiside called DDT, that would harm the environment and everything in it.

Plants that are known as the Bryophytes are pine trees.

(False) Because Bryophytes are mosses and pine trees come from the Gymnosperm

Fungi are all unicellular, simple plants, that evolved early.

(False) Because Fungi are multicellular and the mosses evolved early

An animal that has two embryonic germ layers, radial in symmetry and has tentacles.

-Belongs in the Phylum Cnidaria

Example: Octopus and squid

Means without a body cavity

**coelom=fluid filled body cavity**

Spicules= calcium that gives it shape

Choanocytes=feeding cell

Mesoglea=?

Gemmules=?

"Freshwater sponges have ________that work as a skeleton to help hold their shape" spicules; choanocytes; mesoglea; gemmules

"A unique feeding feature in the phylum Molluscs is..";foot; tentacles; chelicerae;radula

Radula=many molluscs feed by using a file-like organ "Radula"

(Polychaeta=tubeworm;Poly=has many ; chaeta=brissels)

"Has a feathery bristle and live in a tube in marine environment..."

oligochaeta; hirundinea;polychaeta;cephalochordate

oligochaeta=earthworms

hirundinea=leeches

polychaeta=tubeworms that live in the sea

cephalochordate=something that has to do with vertebrates

Early vertebrate that did not have a jaw