BIOL 102 Lecture Notes - Lecture 21: Commensalism, Lichen, Parasitism
Document Summary
An organism that modifies, creates or destroys habitat and directly or indirectly modulates the availability of resources to other species, causing physical state changes in biotic or abiotic. Role of bees bees are pollinators associated with evolution of flowering plants pollen: small, thick-walled plant structures that contain cells tat develop into sperm pollination, transfer of pollen from one plant to another. 75% of flowering pants are dependent on insect pollinators keystone species: species on which other species depend; hold community together. Ecosystem biotic trophic structures primary consumer are called herbivores which eat plants above the level of primary consumers are carnivores which eat the consumers from the level below: secondary, tertiary, quaternary. Symbiosis: relationship in which two different organisms live together, often interdependently. Algae or cyanobacteria (or both) living among filaments of a fungus in a symbiotic relationship. The fungal organism is good at absorbing water and many other nutrients in the environment.
