PCA: WEEDS | TOP SCORES MADE SIMPLE | TRUSTED
TEST SOLUTIONS!
ACE EVERY QUIZ | CONFIDENCE BACKED BY
ACCURACY!
Dicot Answer: have two seed leaves inside the seed coat. They are usually rounded
and fat, because they contain the endosperm to feed the embryo plant
Monocot Answer: An angiosperm that has only one seed leaf.
reproductive capability of weeds Answer: weeds often form persistent seedbanks and
can reproduce at a young age. rhizomes or other vegetative structures, these plants can
form thick, single-species stands.
Describe the mechanisms by which weed seeds are disseminated. Answer: Wind,
water, animal + human: poop, clothing/fur, accidental planting, transport, soil movement,
Describe how the following factors contribute to regulating the seed bank and seed
longevity:
Cultural Answer: Mulching
Describe and give an example of biological weed control using:
a. arthropods;
b. pathogens;
c. grazing animals. Answer: Arthropods- cochineal attacking prickly pear cactus.
Pathogens- Using rust to control orange wattle
Grazing animals- Goats eating weeds to prevent reseeding and fires.
Soil solarization Answer: Not only kill pathogens, but can cook/destroy weed seeds to a
certain depth.
Weed control: steaming Answer: The use of high temperature water onto weeds
Describe some preventative measures that can be used to manage weeds: Quarantine
Answer: Hold livestock that may be infested with seed in a single location until they are
shorn or until weed seeds have had the chance to pass through their digestive system.
Feed out infested fodder in a feed lot type situation only and introduce clean fodder to
stock.
Mode of Action Answer: The mechanisms by which herbicides kill plants
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
TEST SOLUTIONS!
ACE EVERY QUIZ | CONFIDENCE BACKED BY
ACCURACY!
Dicot Answer: have two seed leaves inside the seed coat. They are usually rounded
and fat, because they contain the endosperm to feed the embryo plant
Monocot Answer: An angiosperm that has only one seed leaf.
reproductive capability of weeds Answer: weeds often form persistent seedbanks and
can reproduce at a young age. rhizomes or other vegetative structures, these plants can
form thick, single-species stands.
Describe the mechanisms by which weed seeds are disseminated. Answer: Wind,
water, animal + human: poop, clothing/fur, accidental planting, transport, soil movement,
Describe how the following factors contribute to regulating the seed bank and seed
longevity:
Cultural Answer: Mulching
Describe and give an example of biological weed control using:
a. arthropods;
b. pathogens;
c. grazing animals. Answer: Arthropods- cochineal attacking prickly pear cactus.
Pathogens- Using rust to control orange wattle
Grazing animals- Goats eating weeds to prevent reseeding and fires.
Soil solarization Answer: Not only kill pathogens, but can cook/destroy weed seeds to a
certain depth.
Weed control: steaming Answer: The use of high temperature water onto weeds
Describe some preventative measures that can be used to manage weeds: Quarantine
Answer: Hold livestock that may be infested with seed in a single location until they are
shorn or until weed seeds have had the chance to pass through their digestive system.
Feed out infested fodder in a feed lot type situation only and introduce clean fodder to
stock.
Mode of Action Answer: The mechanisms by which herbicides kill plants
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
