Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
Definition: the living together or close association of two dissimilar organisms
|
symbiosis
|
|
|
Definition: 2 organisms live together for mutual benefit
|
mutualism
|
|
|
Definition: neither symbiont in a symbiotic relationship are harmed, typically one benefits
|
commensalism
|
|
|
Definition: host is harmed but parasite benefits
|
parasitism
|
|
|
Definition: predator kills and consumes prey
|
predation
|
|
|
Example of mutualism and nitrogen fixing.
|
Rhizobia
|
|
|
During mutualism, when nitrogen is low, the rhizobia are attracted to plants when they release what?
|
flavenoids
|
|
|
During mutualism, when nitrogen is low and the plants have released flavenoids, what happens?
|
the bacteria make NOD factors and cause plant cell division & curling of the root hairs
|
|
|
Once the plant root hair is curled, what do the rhizobia do?
|
They invade plant cells, divide, and become non-growing bacteroids which fix nitrogen so its available again to the plant.
|
