1
What type of root system has a large primary root that grows straight down?
Taproot system
Which of the two types of flowers in a composite flower head are showy and usually mistaken to be petals?
Ray flowers
What type of special leaf holds a vine upright by coiling around a support structure?
Tendrils
A leaf that lacks a petiole is a(n) _______ leaf.
Sessile
Middle layer of the leaf, where most photosynthesis occurs
What is Mesophyll
Which of the following compounds is produced by the light reactions of photosynthesis?
NADPH
Protects and covers the leaf
Epidermis
Large, central vein
Midrib
What term refers to trees that lose their leaves each fall?
Deciduous
What plant familiy is known for its poisonous members?
Cashew
Which of the following is one of the three most important cereal grasses?
Rice
The creeping, aboveground stem of a grass plant is a(n) _______.
Stolon
What is the pressure produced by water within cells?
Tugor Pressure
What type of bacteria returns soil nitrogen to the air?
Denitrifying bacteria
A botanist studying the rate of photosynthesis analyzes the chemical composition of one leaf from each of several nearly identical plants. She than places each plant in a separate sealed, clear box containing a known composition of atmospheric gases and allows them to sit under carefully controlled lighting conditions. After a day, she analyzes the chemical composition of the atmosphere in each box and of another leaf from each plant.
When the botanist separates the leaf contents to analyze them, she finds that the mixture contains green, blue, and yellow substances. What best describes why this is?
The leaf naturally contains blue and yellow pigments that are masked by the presence of green chlorophyll.
What is the scientific term for flowering seed plants?
Angiosperms
Which of the following is MOST likely to result if a plant's meristematic tissue is damaged?
The plant cannot grow or repair tissue damage
What type of vascular tissue carries sap upward?
Xylem
What type of cells control the flow of air and water into and out of a leaf?
Which of the following is an abscission layer involved in?
Loss of leaves
What BEST explains why grasses are one of the most important groups of plants?
Man and many animals depend directly or indirectly on grasses for most of their food.
Is a plant that has broad, flat leaves with branching veins most likely from a monocot or from a dicot?
A dicot