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For an element to be regarded as essential, all of the following criteria must be met,
except:
No other element can perform the function.
The element is directly involved in plant nutrition.
The element is inorganic.
The plant cannot complete its lifecycle without the element. - Answer: The element is
inorganic
The nutrient that is part of carbohydrates, proteins, and nucleic acids, and that forms
biomolecules, is ________.
Nitrogen
Carbon
Magnesium
Iron - Answer: Carbon
Most ________ are necessary for enzyme function.
Micronutrients
Macronutrients
Biomolecules
Essential nutrients - Answer: micronutrients
What is the main water source for land plants?
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,Rain
Soil
Biomolecules
Essential nutrients - Answer: soil
Which factors affect soil quality?
Chemical composition
History of the soil
Presence of living organisms and topography
All of the above - Answer: All of the above
Soil particles that are 0.1 to 2 mm in diameter are called ________.
Sand
Silt
Clay
Loam - Answer: sand
A soil consists of layers called ________ that taken together are called a ________.
Soil profiles : horizon
Horizons : soil profile
Horizons : humus
Humus : soil profile - Answer: horizons : soil profile
What is the term used to describe the solid rock that lies beneath the soil?
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,Sand
Bedrock
Clay
Loam - Answer: bedrock
Which process produces an inorganic compound that plants can easily use?
Photosynthesis
Nitrogen fixation
Mycorrhization
Calvin cycle - Answer: nitrogen fixation
Through mycorrhization, a plant obtains important nutrients such as ________.
Phosphorus, zinc, and copper
Phosphorus, zinc, and calcium
Nickel, calcium, and zinc
All of the above - Answer: phosphorus, zinc, and copper
What term describes a plant that requires nutrition from a living host plant?
Parasite
Saprophyte
Epiphyte
Insectivorous - Answer: parasite
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, What is the term for the symbiotic association between fungi and cyanobacteria?
Lichen
Mycorrhizae
Epiphyte
Nitrogen-fixing nodule - Answer: lichen
In a plant's male reproductive organs, development of pollen takes place in a structure
known as the ________.
Stamen
Microsporangium
Anther
Tapetum - Answer: microsporangium
The stamen consists of a long stalk called the filament that supports the ________.
Stigma
Sepal
Style
Anther - Answer: anther
The ________ are collectively called the calyx.
Sepals
Petals
Tepals
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