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Plants Ch2

chlorophyll A green photosynthetic pigment found in the chloroplasts of plants, algae, and some bacteria.
photosynthesis sun light provides the energy for this food-making proccess
tissue are group of similar cells that perform a specific function in an organism
chloroplast An organelle in the cells of plants and some other organisms that captures energy from sunlight and changes it to an energy form that cells can use in making food.
vacuole is a large storage sac that can expand and shrink
cuticle The waxy, waterproof layer that covers the leaves and stems of the most plants.
vascular tissue a system of tubelike structures inside a plant through which water and minerals, and food move
root cap protects the root from injury as the root grows through the soil
cambium divides to produce new phloem and xylem
stoma the surface layers of the leaf that have small openings, or pores
transpiration water evaporates from plant's leaves
embryo the young plant that develops from the zygote, or fertilized egg
germination occurs when the embryo begins to grow again and pushes out of the seed
flower reproductive structure of an angiosperm
pollination is the transfer of pollen from male reproductive structures to female reproductive structures
sepal when a flower is still a bud enclosed by leaf like structures
petal when the sepals fold back, they reveal the flower's colorful
stamen are the male reproductive parts
pistil female reproductive parts
ovary protects the seeds as they develops
L4 sporophyte stage when the plant produces spores
gameotophyte stage when the plant produces two kinds of sex cells: sperm cells and egg cells
annual flowering plants that complete a life cycle within one growing season
biennuals angiosperms that complete their life cycle in two years
perennials flowering plants that live for more than two years
fertilization the process in sexual reproduction in which an egg cell and a sperm cell join to form a new cell
zygote fertilized egg
cone the reproductive structure of a gymnosperm
ovule a plant structure in see plants that produces the female gametophyte
fruit the ripened ovary and other structures that enclose one or more seeds
Lesson Five
Tropism A plant's growth response toward or away from a stimulus
Hormone a chemical that affects how plant grows and develops
Auxin speeds up the rate at which plant's cells grow and controls a plant's response to light
Photoperiodism a plant's response to seasonal changes in the length of night and day
Dormancy a period of time when an organisms growth activity stops
Created by: CIH05