check-up 3 Flashcards
the first two needs of complex plants are ? and warmth
light
the ? provides light and warmth
sun
God has placed the sun at exactly the right ? from earth to provide the amounts of light and heat needed by plants
distance
photosynthesis is the ? to a complex plants survival
key
light must be present for ? to take place
photosynthesis
plants get light from the sun or from ? light
artificial
most plants must be kept warm since the cells of plants can be ? by cold
damaged
a plant draws water through its roots and transports the water through tubes in the ? to the leaves to be used during photosynthesis
stem
a plant uses ? to help transport food throughout the plant
water
a plant that lacks water will ? and become limp
wilt
without water the leaves cannot continue their work of ? food
manufacturing
plants need minerals from the soil to ? new plant cells and to help carry out photosynthesis
build
farmers sometimes use ? to encourage new plant growth and to increase production of fruits and vegetables
fertilisers
there are three basic types of ? plants
complex
? are often grown as house plants because they require little care
Ferns
fern do not need ? because they do not produce seeds
flowers
ferns ? by spores
reproduce
ferns are classified as ? -bearing plants
spore
spores form in spore cases in the underside surface of a fern ?
leaf
spore ? look like tiny eggs or balls
cases
when the spores ?, the spore cases break open and release the spores
mature
ferns grow best in mild ?
climates
giant ferns are called ? ferns
tree
a few varieties of tree ferns can still be found in ? forests
tropical