A perennial plant - develops from either seed or vegetative structures.
A weed is - a plant out of place
An annual plant - develops from seed only
Mutation - a change in DNA sequence of a gene
steps of genetic engineering - chromosomal>DNA>rDNA>mRNA>Ribosomes>Protein
T or F? Winter-annual weeds germinate in the fall, winter, and spring. They produce
seed and die with the first frost. - False
T or F? The carrots that we buy in a store are from a plant that is more than 1 year old. -
False
Should there be more genetic diversity in species of annual or perennial weeds? -
Annual
T or F? Perennial weeds die at the end of their growing season - False
T or F? Perennial weeds can grow through preemergence herbicides and mulches -
True
T or F? Some nutritional disorders in a plant can look like a disease - True
T or F? Pruning trees when insects are active can help spread disease. - True
T or F? The best way to prevent pesticide resistance is to not rely on on one mode of
action of a pesticide to control a pest but rather use use a combination for each pest of
Chemical
Mechanical
Cultural
Biological
Prevention / Sanitation - True
Phytophagous means: - plant eater
T or F? Agronomy includes live stock. - False
How has food production kept up? - Increase Production Efficiency, Technology,
Farmer Education, Pesticides, Mechanization
, T or F? Agroecology - Total interaction between crops & animals and their environment
within a farming or ranching operation. - False
T or F? Management decisions affect all organisms in the ecosystem and the non-living
portion of the system. - True
Which of the following would not be a biotic factor: - Organic matter
Which of the following abiotic factors does the farmer typically NOT have control over: -
tempreture
Abiotic factor include all except? - herbivory
A monoculture is defined as: - having only one species in a field
High genetic diversity is a common characteristic of plants in a: - natural ecosystem
High genetic diversity is a characteristic of: - natural ecosystems
High species diversity is common in: - natural ecosystems
High stability is characteristic of: - natural ecosystems
Natural ecosystems are characterized by having: - closed nutrient system
Non-living factors that affect an ecosystem are called______________factors: - abiotic
Stability is lower in an agroecosystem compared to a natural system due to: -
Organisms are not able to readily adapt to sudden environmental changes or pest
infestations due to a limited gene pool
These crops are grown for their vegetative matter to be used as livestock feed: - forage
crops
Which of the following is not a common use of plants? - population control
Which of the following is classified based on crop use? - all answer choices are correct
A Nurse Crop is: - Annual crop planted with a perennial crop to aid in establishment of
perennial crop
A cover crop is: - Crop grown to protect the soil from erosion
A green manure crop is: - A crop plowed under to improve the soil
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