4: Plants and Ecology
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What is osmosis
The natural movement of water through a semipermeable membrane
How does osmosis work in the roots of the plants
A mixture of sugars and water is inside the root, with the semipermeable membrane which only lets water through (sugar is too big), the water diffuses into the roots due to there being a low concentration of water because of the sugar
What can the root hairs on a plant be likened to
villi in the small intestine (more surface area = more absorption)
What is the difference between osmosis and reverse-osmosis
Osmosis draws water in to balance out concentrations, whereas reverse-osmosis is when water is forced out through a semipermeable membrane to filter out residue
What are the two body systems in the plant
root and shoot systems
What can the roots be likened to
A mine, where nutrients and resources are collected
What can leaves be likened to
Factories, where the processing of nutrients into energy and viable products occurs
What can the stem be likened to
A superhighway through where goods are transported
What is the chemical that is responsible for absorbing sunlight
chlorophyll
What is the organelle responsible for conducting photosynthesis
The chloroplasts
True or False: Plants have mitochondria
True, although they produce glucose, they still need to respirate to get energy –> that means they technically breath both oxygen and carbon dioxide
What are some purposes of the roots
to absorb nutrients and give the plant a stable structure
What are some purposes of the stem
To give upright structure and transport glucose around the plant and water and nutrients from the roots to the leaves
What are some purposes of the leaf
bruh. Just photsynthesis
What are some tissues in the vascular bundles in the stem
Phloem and Xylem tissue. And, to some extent, mesophyll tissue
What is the purpose of phloem tissue
Phloem tissue transports glucose around the plant
What is the purpose of mesophyll tissue
To maximize photosynthesis
What is the purpose of xylem tissue
To transport water and nutrients from the roots the leaves
What is the difference between monocots and dicots
monocots have parallel leaf veins,1 seed leaf(cotyledon) whereas dicots have net like vein spread and 2 seed leafs (cotyledon)
What is the difference in vascular bundle arrangement between a monocot and dicot
monocots vascular bundles are scattered, whereas dicot vascular bundles are arranged in a ring
What are flowers used for
reproduction
What do sepals do
to protect the bulb
What do petals do
To attract pollinators
What does the carpel (pistil) do
Collect pollen from pollinators or wind to fertilize the ovums