What is it?
Tissue
a group of cells of the same origin, shape, properties, and function
Epidermis
one layer of flat cells without intercellular spaces on above-ground organs
Which science investigates tissues?
Histology
Which 3 branches do we distinguish?
Red, Brown and Green
Which thallus is the most developed and which parts are there?
Tissue - like thallus
rhizoid, fyloid, cauloid
Plasmodesmata
communication channels between individual cells of a tissue that pass through the cell wall.
rhisodermis
on the surface of roots
Which meristems can we find on a plant?
original, primary, secondary, latent
What combinations of chlorophyll do the 3 branches have?
Green - a,b,
Brown - a,c
Red - a,d
Which monocellular algae forms colonies?
genus Volvox, pandorina
Meristematic tissue
Tissue that origins from one single cell
stomata
on the surface of leaves, lower skin
According to which categories do we divide tissues?
Origin, ability to divide during life and function
Which division is used to agar and what is it?
Rhodophyta- red algae - a jelly-like substance used for foodstuffs and media
What colour is fukoxantin and where is it present?
brown - brown algae
Stomata
pairs of bean-shaped cells with a pore between them; contain chloroplasts which
Allow transpiration (release of water vapor) and gas exchange (O₂, CO₂)
prosenchyma
in the epidermis of onion
Which permanent tissues do you recognize?
parenchyma, prosenchyma, sclerenchyma and colenchyma
What is stigma?
a red spot in Rhodophyta with sensory ability
What colour is fycoerithrin and which algae have it?
red - red algae
Cuticle
a protective layer on the surface of epidermis
sclerenchyma
plum stone walls, nut shells, grass stems
Which thalli do we know?
Unicellular/Multicellular
Unicellular: non-motile - coccal/ motile - amoeboid, flagellated
Mullticellular: trichal (filamentous), siphonal, siphonocladal, tissue-like
What is spirogyra?
A filamentous green algae with a spiral-like chloroplast in its cell
What do we use seaweed for?
fertilisers, foodstuff, fuel, POTASH (K2CO3)