Living Organisms and Ecosystems

A period of inactivity in seeds or plants when energy is limited.

the process by which cells break down sugar to release stored energy

the joining of a sperm cell and an egg cell

Growth of a plant in response to the direction of gravity.

a simple sugar that is an important energy resource in living organisms

a flower structure that protects seeds as they develop

a plant structure in seed plants that contains and egg cell

the colorful leaf-like structures that some flowers have

the process by which plants and some other organisms capture light energy and use it to make food from carbon dioxide and water

Growth of a plant in response to the direction of the light.

a female reproductive part of a flower

tiny particles (male gametophytes) produced by seed plants that contain the cells that later become sperm cells

animals that move pollen from flower to flower

A reaction or reflex to a stimulus

a leaf-like structure that encloses the bud of a flower

a male reproductive part of a flower

any change or signal in the environment that can make an organism react in some way

Movement of a plant toward a stimulus

the process by which a new organism forms from the joining of two sex cells

Process by which water is lost through a plants leaves