How do cells in a meristem differ from cells in other types of plant tissue?
they continue to divide
Other than the transport of materials, what is another function that vascular tissue performs in a leaf?
the tissue functions as a skeleton that reinforces the shape of the leaf.
Cell division in the vascular cambium adds to the girth of a tree by adding new ___ to the layer's interior and ____ to the layer's exterior.
xylem ... phloem
Cellular differentiation is responsible for ____.
one daughter cell becoming a sieve tube whereas the other becomes a companion cell
Cellular differentiation and morphogenesis in plants depends primarily on ____.
regulation of gene expression
Plants must always compromise between ____ and _____.
maximizing photosynthesis .... Minimizing water loss
The proton pump ____.
uses the energy stored in ATP to produce a hydrogen ion gradient across membranes
A plant cell placed in a solution with a lower (more negative) water potential will ___.
lose water and plasmolyze
Which of the following is a correct statement about a difference between xylem and phloem transport?
xylem sap moves up; phloem sap moves up or down
A student is performing a chemical analysis of xylem sap. This student should not expect to find much ____.
Which one of the following refers to the loss of water through the stomata in a plant's leaves?
In addition to transporting sugar, the phloem also ____.
all of the above (transmits electrical signals; transports viral RNA throughout the plant; transports plant RNA throughout the plant; transports proteins throughout the plant)
A major long-term problem resulting from excessive irrigation is the ____.
accumulation of salts in the soil
For an element to be considered a macronutrient____.
it must be required in relatively large amounts
The sundew plant has to digest insects because ____.
it obtains nitrogen from their bodies that it cannot get from the soil
In angiosperms, each pollen grain produces two sperm. What do these sperm do?
one fertilizes an egg, and the other combines with two polar nuclei, which develop into stored food cells (endosperm)
Which of the following is an example of sexual reproduction?
fusion of sperm and egg nuclei in an ovule
Which of the following is an advantage of asexual reproduction in plants?
enhanced survival of genetically favorable offspring
Which of the following is one possible advantage of biofuels vs. Oil?
the CO2 produced by biofuels will be absorbed by the crops used to produce them, creating a carbon-neutral cycle
Which of the following seedlings will probably bend toward light?
one whose tip is separated from its base by a gelatin block
Which of these plant hormones is not typically considered a growth-promoting substance?
Which of the following is a response in plants to a water deficit?
reduction in the rate of transpiration
Which of the following is a difference between plants and fungi?
fungi are heterotrophic, and plants are autotrophic
The body of most fungi consists of threadlike ____, which form a network called a ___.
hyphae .... Mycelium
An important example of interaction between fungi and certain other organisms is mycorrhizae, in which the fungal partners _____.
help plants take up nutrients and water
Almost all of the members of this phylum form arbuscular mycorrhizae in a mutualistic partnership with plants.
Fungi of the phylum ascomycota are recognized on the basis of their production of ____ during sexual reproduction.
Fungi form mutualistic relationships with plants and animals. Which of the following is an example of such a relationship?
all the above (fungi help break down plant material in the guts of grazing animals; fungi can help increase drought tolerance in plants; fungi help break down wood in the guts of termites)