sábado, 14 de mayo de 2011

Vocabulary #1

chlorophyll: is a chemical that gives plants their green color and traps light energy.



photosynthesis: is the process in which plants use water, carbon dioxide, and energy from the sun to make food.
vascular plant: plants that have tubelike cells in their roots, stems, and leaves to carry food and water.


nonvascular plant: plants that don't have tubelike cells in their stems and leaves.
moss: is a small, nonvascular plant thtat has both stems and leaves but no roots.


sexual reproduction: is the forming of a new organism by the union of two reproductive cells.


egg: a female reproductive cell.

sperm: a male reproductive cell.

fertilization: the joining of the egg and sperm.
xylem: cells carry water and dissolved minerals from the roots to the leaves.


phloem: cells carry food that is made in the leaves to all parts of the plant.

fern: is a vascular plant that reproduces with spores.
seed: is the part of a plant that contains a new, young plant and stored food.


embryo: is an organism in its earliest stages of growth.


conifer: is a plant that produces seed in cones.

pollen: are the tiny grains of seed plants in which sperm develop.

flowering plant: is a vascular plant that produces seeds inside a flower.


flower: is the reproductive part of the plant.


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