Lecture 1 Flashcards
What 4 Organs are in an Organism?
Roots, Stems, Leaves and Flowers.
An Organism consists of what 2 systems?
Root system and Shoot system.
What are the different types of roots?
Fibrous and Tap.
90% of plants have what type of root?
Fibrous.
Tap Roots thrive in what type of environment? Why?
Dry Climates. Deep root system.
What is a Stem responsible for?
Transportation of water and food.
What are the functions of Leaves?
Capture light for photosynthesis (food production).
Gas exchange.
Protective mechanism in some plants.
What do flowers do?
Pollinate and Reproduce.
Tree roots have what type of root system?
Fibrous.
How far past the drip line can tree roots grow?
2 1/2 - 3 times past the drip line.
Name the 3 internal structures of a leaf.
Dermal Tissues, Ground Tissues and Vascular Tissues.
Epidermis. Explain…
Outermost Layer of the leaf, one-cell thick.
What is a Stomata…and a what are it’s functions?
Small pores located in the epidermis of a leaf. Allows CO2 in and Water & O2 out.
**Close during special conditions….intense heat, wind, drought.
The loss of water vapor from the plant body is called…..
Transpiration.
**more than 90% of the water absorbed by plant roots is lost into the air as water vapor.
The process by which water molecules diffuse through a membrane from an area of greater concentration to an area of lesser concentration is called….
Osmosis.
Osmosis
The process by which water molecules diffuse through a membrane from an area of greater concentration to an area of lesser concentration.
Name two cell structures that are in plants but not in animals…
Cell walls and Chloroplasts.
Dicots has what type of root?
Tap Roots
Monocots have what type of root system?
Fibrous Roots
Mitosis
The process of Cell Division and occurs is specific areas called Meristems (located at the crown).
Bulliform Cells
bulliform cells….These cells are bubble shaped, water-filled and control leaf rolling and unrolling. Under drought conditions, bulliform cells collapse and the leaf rolls up.
Meristems
Where Mitosis occurs. (At the crown)
Primary Growth means….
Only an increase in length.
Secondary growth means…..
an increase in both length and diameter.
Mitosis vs Meiosis
Cell Division vs Sexual Reproduction
Define Xylem:
Vascular Tissue cells that transport water from the roots to the shoot.
Define Phloem:
Vascular Tissue cells that are responsible for the transportation of sugar throughout a plant.
Define Dicots:
Tap Roots
Flowers in multiples of 4-5 petals
Leaf veins are net like (branch out)
Ex. Dandelion
Define Monocots:
Parallel leaf veins
Flowers have multiples of 3 petals
Fibrous root system
Ex. Grasses
DNA has the shape of a :
Spiral Staircase
Describe Nucleus:
Information, DNA
Describe Vacuole:
Holds Water
Describe Cell Wall:
Provides Protection
Describe Cytoplasmic Membrane:
Doors and Windows, let’s stuff in and out
Define Chloroplasts:
contain Chlorophil, are a vital component for photosynthesis, make those cells turn green
Define Mitochondria:
responsible for Respiration.
What are the limiting factors for Photosynthesis?
CO2, Sunlight and H20
What is the Photosynthesis formula?
CO2 + H2O (add Sunlight and Chlorophil) = C6H12O6+O2
C6H12O6 = Food or Sugar O2= By Product
