bio quiz 2 Flashcards
learn ASAP
what is dermal tissue
the outer layer of cells overing herbacous plants
what is the dermal tissue also known as
Epidermis
where is ground tissue located, what does it do
ground tissue is located beneath the Epidermis and provides strentgh and support while storing water and nutrients
vascular tissue function
transport of matierals throughout the plant
what are meristems
a specific site of cell division creating growth
what is the function of xylem
moves water and other dissolved minerals UP the plant
what is the function of pholem
transports sucrose and other dissolved sugars from the leaves to the other [arts of the plant via sieve tube cells
what is the function of root hairs
increase the surface area for absorbation of nutreints in the roots
what is the function of roots
absorb water and minerals
define upper Edpidermis
one cell layer thick transparent structure, on the outermost portion of the cell, it lacks cholorplasts and is protected by the cuticle
define cuticle
a waxy secretion created by the plant to protect it from insects and water loss
define Palisade layer
provides structure and contains chloroplasts, it carries out the majority of the photosynthesis process and is located beneath the epidermis
define chroloplats
a specialized organell containing chorophyll and participates in photosynthesis
spongy layer
located beneath the Palisade layer contianing some chloroplasts, and is primairly used in the storage of sugars/amino acids
mesophyll (define)
specialized ground tissues betwen the upper and lower Epidermis
what are the two comoenets to the mesophyll layer
Palisade tissue cells, and the spongy mesophyll tissue
define palisade tissue cells
below the upper epidermis, long rigid tightly packed cells that are repsonsible for photosynthesis
define the spongy mesophyll tissue
between the palisade layer and the lower epidermis, primary function is gas exchange by diffsuion.
lower Epidermis
similar to the upper epidermis but also contains the stomata
stomata (define)
cells allwoing the exchange of gasses, flanked by 2 gaurd cells
what is the function of gaurd cells
regulate the opening and closing of the stomata
define lenticils
porus tissues alllwoing gas exchange between the envrionement and internal tissues
what is the word and chemical equation for photosynthesis
carbon dioxide + water——- in the presesnce of light——> creates glucose and oxygen
chemical forumla: 6H(2)0 + 6CO(2) +energy —–> C(6)H(12)O(6) + 6O(2)
who discoverd cytoplasmic flow
robert brown (discoverd cholorplasts moving in cells)
