Lab 3: Plants Part 1: Plant Form and Function Flashcards
which species did we bring back from lab 1 in this lab?
we brought back the a.thaliana seedlings that we grew in lab 1.
What is the root and shoot system in plants?
it is the way plants acquire resources from below group and above ground via continuous network of veins known as vascular tissues
What are the basic organs of a plant? What do they do?
the basic organs of the plant are left, stem and shoot.
The leaves capture light energy via photosynthesis
The stems maintain plant structure and transport water, nutrients and sugars
Roots absorb water and nutrients from the soil
What are buds?
Buds are usually what identifies a stem, and its where organs differentiate
What are the three major plant tissue types and what do they do?
the three tissues are: the dermal tissue, the vascular tissue and the ground tissue
the dermal tissue is the outer layer of cells covering the plant and is composed of the epidermis and the cuticle. Hairs called trichomes also might be present
The vascular tissues run throughout the whole plant, and it is composed of the xylem and phloem
The ground tissue is the tissue that fills the space between the epidermis and the vascular tissue. This area depends on the plant whether it serves a purpose for photosynthesis, support, food storage, and protection
What is a petiole? and what is a node?
a petiole is what the leaf has that attaches the blade of the leaf to the stem of the plant. The point of attachment of the petiole and the stem is called the node
What are the three patterns of leaf arrangement on the stem in plants?
- alternate (spiral)
- opposite (pairs)
- Whorled (3 or more on the same node)
What are the two leaf shapes a leaf can be?
- it can be simple (one leaf)
2. It can be compound leaf –> divided into leaflets
What is a primary root and why is it important?
a primary root is the first root that the seed sends into the soil when it germinates its also called a radical root. Little roots extend from the primary root and form the root system
What are two types of primary roots?
- taproot system –> when the primary root is the largest and most important root system
- fibrous root –> plant has more than one main root forming
how does leaf shape effect photosynthesis?
larger the leaf, the more sunlight it can take in and more co2 it can take in
when might a taproot system be an advantage over fibrous roots?
when you are looking to anchor the plant stronger
How would these organs (leaves, roots and stems) be different in desert plants and tropical plants?
In deserts, there should be bigger leaves, taproots and and a larger stem in order to absorb more water
in tropical places, it can be any shape or size because it will absorb moisture from the environment
What is the function of the epidermis?
it is the outermost layer of the cells.
- the cuticle is a waxy covering on the outside of the plant
What is the function of the cortex?
it is the tissue region just interior to the epidermis. It may contain cells for storage of starch, support cells and chloroplasts for photosynthesis (these are usually close the outside of the stem)
