Science Lifepac Gr6 Unit 1 Review 3
auxin
chemical produced in growing root tips
oxygen
gas made in photosynthesis
starch
many glucose units stacked together
gibberellin
plant chemical discovered in fungas
glucose
simple sugar
stomata
small holes in the leaf
legume
soybeans
phloem
tubes carrying food down to roots
xylem
tubes carrying water and minerals
cuticle
waxy layer of leaf
tissue decay
Birds that eat food polluted with arsenic have ________.
True
Coconut milk contains the chemical cytokinin.
True
Giberellins cause seeds to germinate more quickly.
stomata opens and closes
How carbon dioxide gets into a leaf and oxygen gets out.
transport minerals and water
Job of plant veins.
tip
Leaves have the greatest amount of chemical regulators at the __________.
False
Man cannot artificially cause a stem to grow roots.
False
Man now knows everything that there is to be known about plants and how they operate.
True
Manure is a form of organic fertilizer.
False
Most plants do not contain auxins naturally.
False
Organic farming grows more food than chemical farming.
True
Some growth regulators are useful to farmers and gardeners.
False
The chemical 2, 4-D causes liver decay in birds.
pith
The dead xylem and phloem is called _________.
glucose
The first substance made by leaves, which can be made into many other chemicals, is ___________.
palisade
The leaf layer containing chloroplasts is ________.
root
The major food storage part of carrots is the ________.
cortex
The storehouse of food and water in roots is the _________.
anchor plants, transport water and minerals, store food
The three purposes of roots are ______, ________, and _________.
when the leaf dies the chloroplasts die
Why do some plants leaves change color in the fall?
no sunlight
Why grass turns yellow when covered.
False
All plants carry on photosynthesis.
broad
A geranium is an example of a _________ - leafed plant.
