All of the following contributed to the dust bowl in the american southwest during the 1930s
overgrazing by cattle
plowing of native grasses
planting of field crops
lack of soil moisture
why does overwatering a plant kill it?
The roots are deprived of oxygen
a farming commitment that embraces a variety of methods that are conservation minded, enviromentally safe, and profitable
what would be the most efficent strategy to remove toxic heavy metals from a soil?
adding plant species that have the ability to take up and volatize heavy metals
what is the general role of micronutrients in plants?
they are cofactors in enzymatic reactions
a process that converts nitrogen gas into ammonia
at the conclusion of meiosis in plants, the end products are always four haploid _____
what is considered to be a multiple fruit?
sequence during the alternation of generations life cycle in a flowering plant
sporophyte --> meiosis--> gametophyte --> gametes --> fertilization --> diploid zygote
recent research has shown that pollination requires that _____ recognize pollen grains as "self or non self"
For self-incompatibility, the system requires
the rejection of self cells
waht metabolic process is occuring at low levels in a full, mature, viable, dry seed?
If you chop off the top of a plant, can it still find which direction the light is coming from?
plant hormone that allows cells to enlarge
plant hormone responsible for cell divison
plant hormone responsible for
plant hormone that is a big stimulator for germination
plant hormone in a gas form that ripens
Growth in response to something
When plant roots grow towards the earth and the stems grow up
When plants grow toward the light
A plant's response to touch
When plants flower when the night exceeds a certain amount of time
consists of the anther and filament, the male part of an angiosperm
consists of the ovary, ovules, stigma, and style, the female part of an angiosperm
have all 4 basic organs
the stalk of the male system of angiosperms
located on top of the filament, contains microsporangia that produce pollen
long slender neck for transport
contains ovaries at the base
having both female and male reproductive organs
having one sex reproductive organ, male or female
________ undergoes ______, produces a _____ gametophyte consisting of the ______ cell and ____ cell. These cells, along with the ____ wall constitute a ____ grain
Microspore; mitosis; male; generative; tube; spore; pollen
Transfer of pollen from an anther to a stigma. Accomplished by wind, water, or animals.
One sperm, upon reaching the female gametophyte, fertilizes the egg, formin the zygote
General mechanisms, such as inhibiting the germination of pollen on stigmas, or the elongation of the pollen tubes in the styles, that prevent self pollination
Food storing tissue of the seed
formed from the integuments of ovule with embyo and food supply
surrounded by food supply
packed with starch before the seed germinates
the embryonic axis
the shoot base apex and epicotyl
structural integrity of plant spores
directly involved in the construction of the cell plate during cytokinesis
common to both gymnosperms and angiosperms
Angiosperm double fertilization
so-called because if features the formation of one embryo involving one sperm cell and an endosperm involving a second sperm cell
blocks the water taken up by the root hairs, trying to get to the vascular tissues.
the measure of which way water is going to go. Always go from high to low
regulate water in the plant by opening and closing
Plants perform both p_____s and r______n
photosynthesis and respiration