Lesson 3- Intro To Plants Flashcards
Define photosynthesis.
The process by which plants, algae, and some bacteria, use sunlight, carbon dioxide, and water to make food.
Define producers.
Organisms that make their own food using energy in their surroundings.
Define chlorophyll.
A green pigment that captures light energy for photosynthesis.
Define a vascular system.
A conducting system of tissues that transport water and other materials in plants or in animals.
Define seed.
A plant embryo that has a protective coating.
Define pollen.
The tiny granules that contain the male gametophyte of plants.
Define gymnosperm.
A woody, vascular seed plant whose seeds are not enclosed by an ovary or fruit.
Define angiosperm.
A vascular plant that produces flowers and fruits which surround and protect seeds.
What are the characteristics of plants?
They are multicellular eukaryotes, they have a two-stage life cycle, they have walls and vacuoles, they make their own food.
Explain the sporophyte stage.
Plants produce spores that identical to the parent. The spore will find a suitable environment, such as damp soil, then it will grow into a gametophyte.
Explain the gametophyte stage.
There is a female gametophyte called an egg and a male gametophyte called a sperm. The sperm fertilizes the egg, this is called sexual reproduction. The egg then grows into a sporophyte and the cycle repeats.
What is the large central vacuole?
The large central vacuole is a membrane bound organelle that stores the plant’s water. If the vacuole is full then the plant is upright, and if the vacuole is leaking or isn’t full then the plant is wilted.
What is the secondary cell wall?
The secondary cell wall gives woody plants their strength.
What do cell walls do for plants?
They determine the size and shape of the plant cell.
What do chloroplasts make?
Glucose.
