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Science gr.6
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The cell wall helps a plant retain water
cuticle
oxygen
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Irises and lettuce flower when nights are shorter than a critical length. They can be describes as
long day plants
short-day plants
dormant plants
day- neutral plants
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To which three stimuli do plants respond?
touch, gravity and light
touch, gravity and chlorophyll
light, gravity, and soil conditions
water light and touch
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The internal transporting system through which water, minerals and food move inside the plant is called
vascular tissue
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A.............. is a waxy, waterproof layer that covers the leaves and stems of most plats
cuticle
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The sac inside a plant cell where water, wastes and food are stored is called an
vascular
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Organisms that produce their own food are called
heterotrophs
autotrops
herbiroves
autosomes
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A plant stem that grows towards light is an example of a
negative gravitropism
positiv thigmotropism
positive gravitropism
negative thigmotropism
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Nearly all pants are .....
unicellular
multicellular
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The green pigment called ............................ is necessary to the food-making process in plants.
chlorophyll
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The energy for photosynthesis comes from the.............
sun
moon
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During photosythesis, plants produce carbon dioxide
vascular
oxygen
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A.................. is a structure inside a plants cell in which food is made.
chloroplasts
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A group of similar cells that perform a specific function is called
tissue
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Two structures found in plant cells but NOT in animal cells are
cell wall and chloroplasts
vacuole and nucleus
call wall and call membrane
chloroplasts and cell membrane
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When chlorophyll in leaves breaks down
red pigments disappears
photosynthesis begins
the plant becomes very active
yellow and orange pigments become visible
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The process by which plants make food is called
photosynthesis
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The system of tubelike structures inside a plant through which water, minerals and food move is called ....... tissues.
root
vascular
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The sac inside a plant cell where water, food and wastes ate stored is the
chlorophyll
chloroplast
vacuole
cutie
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The green pigment found in specialized plant structures is called
cuticle
chlorophyll
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Which of the following is thought to be the ancestor of land plants?
red algae
bacteria
ferns
green algae
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