Final! Flashcards
Prokaryotes
- Can live almost everywhere
- include bacteria & archaea.
- more prokaryotes than history of humans
Prokaryotes cell
- lacks nucleus
- produce by bynary fission
- may not have organelles
Bacterium
- break down foods in our gut floor.
- clean industrial waste.
- uses whole cell for cellular respiration & photosynthesis
Human biotic infusion
way to put bacteria in gut floor for food breakdown.
4 categories of eukaryotes
- plantea
- animalia
- fungi
- protist( multiple kingdoms)
Definition of protist
- any organism that is not a fungi, animal or plant.
- most unicellular with exceptions, like algae, which are very complex.
- they are NOT taxomic. ( one animal where all others evolved from)
unicellular
composed of a single cell
multicellular
- masses of closely interacting cells
- distinct cell of tissue type.
- cells may not live on their own. (need to be together)
Gram stain
- procedure to determine the bacterium type.
- Gram-positive is dark purple
- Gram-negative is light pink
Eukaryotes cells
- nucleus
- membrane-bound organelles
- nuclear envelope
protist properties
- most live on aquatic environments
- all 5 major eukarya lineages include protist, only 2 are not protist.
- cells are 10 times larger than bacteria & archaea.
colonial growth
cells aggregate but all do same funtion.
Green algae
- are autotrophs
- have chloropyll.
- cell walls made out of cellulose
- store starch in plastids.
crop domestication
- domesticated simultaneously in different parts of the world.
- only certain can be domesticated. ( corn, wheat, rice)
- created beginning of civilization.
- no more locomotion for humans.
ecosystem service
anything an organism does normally that humans derive benefit from. ex. honey we make money. plants reducing Co2.
dominant primary producers
- are in the bottom of the food chain.
2. if primary producers are eliminated, the effect goes to all other animals, and may die.
Wind erosion
Because we cut trees and plants down, the soil weakens and thus creates water & wind erosion. (roots of plants stiffen the soil.)
Green algae
- found in aquatic environments
- get nutrients from water around thus totally submerge.
- cell density is the same as water and bulb in plant help it’s bouyancy. does not need vascular support.
Plants; process of primitive to advance properties.
- non-vascular plants (bryophytes) need water
- seedless vascular plants. need water
- seed plants no water needed.
Plants; primitive to advance names
- liverworts 3-2-2
- hornworts
- mosses
- lycophytes,
- pterophytes ex. whisk, ferns
- gymnosperm (conifers)
- angiosperm (flowers)
three major steps from water to land
- prevent water loss
- transport water and nutrients
- support plant body
how did plants overcome waterloss
- by adaption of the Cuticle, a waxy layer that prevents water loss
- Stomata, pores that allow gas exchange in photosynthesis.
how did overcome the transport of water & nutrients
- adapting a vasuclar system,
- adapting tubes that evolve from , simple,tracheids, to vessels.tubes died, which increased water transport.(cytoplasm died too)
- vessels silmulaneously solved the 3rd problem. (support plant body)
lignin
a polymer which provides tubes with strenght.