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;
16 Cards in this Set
- Front
- Back
|
Are fungi chemoheterotrophs or photoautotrophs?
|
Chemoheterotrophs- require organic compounds for energy and carbon
|
|
|
What is the difference between septate hyphae and coenocytic hyphae?
|
Septate hyphae are in segments and have pres, Coencotic is one long cell
|
|
|
What is the difference between aerial hyphae and vegetative hyphae?
|
Aerial hypha: portion concerned with reproduction, Projects above surface medium of which fungus is growing. Vegetative- portion of hyphae that obtains nutrients.
|
|
|
What is the difference between molds and yeasts?
|
Yeasts: non-filamentous, unicellular fungi, spherical or oval, widely distributed in nature- frequently founf as white powdery coating on fruits and leaves
Molds: multicellular |
|
|
what are dimorphic fungi?
|
2 forms: reproduce by budding- yeastlike growth, vegetative and aerial hyphae- moldlike growth
|
|
|
What are conidia?
|
Conidia is spore
|
|
|
What are mycorrhizae?
|
Plants depend on it, (symbiotic fungi)- help roots absorb minerals and water from soil
|
|
|
Are algae chemoheterotrophs or photoautotrophs?
|
Photoautotrphs, energy from light, CO2 is carbon source. Do algae perform photosynthesis?
|
|
|
Define holdfast, stipe, blade.
|
Holdfast: anchor alga to rock, stipe: stem-like, blade: leaf-like
. |
|
|
Know the 3 algal phyla.
|
1. Phaeophyta (Brown algae)
2. Red algae (Rhodophyta) – red pigments enable blue light absorbtion, can live at greater ocean algar, crustlike coatings on rocks, shells. 3. Green algae: celluslose cell walls, chlorophyll a,b |
|
|
From which type is algin extracted?
|
Brown algae
|
|
|
From which type are agar, carrageenan, and nori obtained?
|
Red algae
|
|
|
What is an algal bloom?
|
Periodic increases in plankton algae, may indicate water pollution- algae thrive in high concentrations of organic material that exist in sewage or industrial wastes, when algae die, large numbers of cells decompose → dissolved oxygen levels in the water are depleted
|
|
|
What are lichens?
|
Mutualistic combination of an alga and fungus, alga produces/ secretes carbohydrates; fungus provides protection
|
|
|
Are protozoa chemoheterotrophs or photoautotrophs?
|
Unicellular chemoheterotrphs
|
|
|
Define: cyst, trophozoite, pseudopods, cilia
|
Cyst: some protozoa produce protective capsule called cyst.
- permits organism to survive when: food moisture, or oxygen are lacking, temperatures are not suitable, toxic chemicals are present. Enables parasitic species to survive outside a host. Trophozoite: feeding and growing stage. Protozoa feed upon bacteria and small particulate nutriets. Some transport food across plasma membrane while others require specialized feeding structures. Digestion occurs in membrane enclosed vacuoles. Psuedopods: lobelike projections of cytoplasm that allow movement in amoeba |
