Tube or not Tube
Stems that grow sideways along the ground are _____.
runners
_____ is the process of putting forth roots and beginning to grow.
rooting
Cacti have prickly needles to _____ them from animals that want to eat them.
protect
A plant that makes its own food is a _____.
producer
Trees grow from the _____ up.
top
Tubes that send water UP from the roots to the rest of the plant are _____.
xylem
Roots grow longer from their _____.
tips
A _____ is a plant with no leaves. Its stem does all of the photosynthesis.
cactus
Little "mouths" on the surface of leaves that take in carbon dioxide and release oxygen and water vapor are _____.
stomata
To find out how old a tree is, you have to cut it down and count its _____.
rings
Tubes that send sugary food DOWN from the leaves to the rest of the plant are _____.
phloem
_____ occurs when the earth's surface is worn away by the action of water and wind.
Erosion
The _____ is a type of flower that opens when the sun comes up and closes when it goes down. Its name sounds like "day's eye."
daisy
A gas that plants release that is necessary for life on the earth is _____.
oxygen
As woody stems grow, they get _____.
thicker
Xylem and phloem are made in vascular _____. These are cells made just inside the surface of the stem.
Cambium
_____ is a plant's response to earth's gravity. It is shown when roots turn downward toward and into the ground.
Geotropism
Chemicals in plants that affect how they grow, are _____ . They make the stem of a plant bend and twist in order to grow towards the light
auxins
A process plants use to make sugar that requires water, sunlight, carbon dioxide and chlorophyll is _____.
photosynthesis
_____ stems are green and easy to bend.
Herbaceous
Plants experience _____ which means "turning towards the light."
phototropism
The Latin word for "earth" is _____.
geo
Sunflowers move throughout the day, so that their flowers are always facing the _____.
sun
A chemical in the air which is necessary for photosynthesis is _____ _____.
carbon dioxide
Stems that are hard and made of wood are called _____ stems.
woody