Science Lifepac Gr6 Unit 1 Review 3

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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.


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