lab 2 Flashcards
what do onion plants form to endure the winter
bulbs
what are scales
modified bulbs consist of small enclosed by overlapping layers of fleshy leafs
what do scales do
store food and water
what is the cell wall
protects and supports the cell
what is the plasma membrane
cell contents are bound by the plasma membrane
what is the function of the plasma membrane
regulates the passage of substances in and out of cell
is the plasma membrane permeable or selectively permeable
selectively permeable
what is the nucleus
controls cell function
how does nucleus control cell function
directs protein synthesis and stores genetic material
what is the nuclear envelope
a double membrane around nucleus
what is the nucleoli
manufactures ribosomal subunits
what is the central vacuole
gives support to the plant cell when fully expanded and storage for water, etc
what is the cytoplasm
remainder of space not occupied by central vacuole
what re cytoplasmic streaming
tiny flowing particles within strands
what is the mitochondria
is the site for cellular respiration
what is cellular respiration
generate energy rich molecules called atp from sugars and oxygen
what are leucoplasts
tiny colourless plastids
what are plastids
membrane bound organelles in plant cells
what are the three types of plastids
chloroplast, chromoplast, and leucoplast
what is chloroplast
site of photosynthesis
what is the process of photosynthesis
light energy is used to sunthesize sugars from CO2 and water
what is chlorophylls
creates the green pigment
where is chlorophylls located
onset of membrane inside chloroplast called thylakoid membrane
what is chromoplast
contains pigment called carotenoid
what is the purpose of chromoplast
attracts animals for pollination and seed dispersal
what is plasmodesmata
it is how plant cell communicate with each other
what are leucoplasts
group of non-pigmented plastids
what is the function of leucoplasts
storage of starches, proteins, or fats
what are anthocyanins
class of blue, purple, and red pigment that occurs in central vacuole
what is the function of anthocyanins
dissolve in water and stored within vacuole
what is stomata
gas exchange occurs
what is the pseudopodia
cellular extension forms as a granular cytoplasm flow forward
what is the microfilaments responsible for
pseudopod formation
what is phagocytosis
trap small animals and other food particles
what is the food vacuole
where food is packaged
what is the lysosome
fuses with food vacuole and supply hydrolytic enzymes to digest food
what is osmoregulation
maintenance of constant internal solute concentration by an organism
what is the cilia and flagella
creates movement in cells
what are cilia and flagella made of
microtubules
what are cilia and flagella made of
microtubules
