Science Ch. 8 Test Flashcards
Which is thought to be the ancestor of land plants?
Green Algae
Organisms that produce their own food are called?
Autotrophs
The sac inside a plant cell where water, food, and wastes are sorted is the ?
Vacuole
Two structures found in plant cells but NOT in animal cells are?
Cell Walls and Chloroplasts
True or False: The cell walls helps a plant retain water
False: The cuticle helps a plant retain water
True or False: During photosynthesis, plants produce carbon dioxide.
False: During photosynthesis, plants produce food and oxygen
True or False: The green pigment found in specialized plant structures is called chlorophyll.
True
True or False: The system of tubelike structures inside a plant through which water, minerals, and food move is called root tissue>
False: The system of tubelike structures inside a plant through which water, minerals, and food move is called vascular tissue
True or False: Nearly all plants are unicellular.
False: Nearly all plants are multicellular
True or False: The energy for photosynthesis is from the sun.
True
Animals are helpful to plants in the process of what?
Pollination
Which is NOT part of a flower’s pistil?
Anther
Which part of a plant is responsible for absorbing water and minerals and anchoring the plant?
Roots
The three parts of a seed are?
Embryo, stored food, seed coat
What is the scattering of seeds?
Dispersal
What is a flower bud that is protected by leaflike structures?
Seafulls
What protects the root as it grows through the soil?
Root cap
What happens if a tree has 24 light and dark rings?
It is 24 years old
What is on the surface of a leaf control the movement of gases into and out of the leaf?
Stomata
What is the hollow structure at the base of a pistil that protects seeds as they develop?
Ovary
A plant stem that grows toward light is an example of a?
Positive Phototropism
To which three stimuli do plants respond?
Touch, gravity, and light
When chlorophyll in leaves breaks down, what happens?
Yellow and orange pigments become visible
Irises and lettuce flower when nights are shorter than a critical length. They can be described best as what?
Long-day plants
True or False:Chemicals produced by a plant that control its growth and development are called hormones.
True
True or False: A plant’s roots grow away from a rock they hit in the soil. This is an example of a positive thigmotropism.
False: It is an example of a negative thigmotropism.
True or False: Chlorophyll speeds up that rate at which a plant’s cells grow and controls a plant’s response to light.
False: Auxin speeds up the rate
True or False: The critical night length for a certain plant is 10 hours. This plant will flower only when nights are shorter than 10 hours.
False: It will flower when nights are longer than 10 hours
A plant adaptation that helps it survive freezing temperatures and lack of liquid water is dormancy.
True
The blooming of poinsettias in winter and irises in spring is an example of phototropism.
False: It is an example of Photopardosim.
