Bio 2 Flashcards
What is the name of the element represented by the symbol Mg?
Magnesium
What component of soil accounts for the dark color seen in soil that is considered desirable for growing plants?
Organic matter
Which of the following is not true about pore space in soil?
- water travels through the pore space
- oxygen diffuses through pore space
- it comprises approximately 20%of soil
- roots grow through pore space
-it comprises approximately 20%of soil
It actually comprises
What do Rhizobium do for legumes that is so beneficial?
Convert nitrogen gas to ammonium.
Why do Rhizobium want to be in a symbiotic relationship with legumes?
Because they get food (sugar) in return.
Nitrogen gas is:
Not available to plants.
Nitrate is:
A form or nitrogen can be peaches as well as be converted by some eubacteria to nitrogen gas.
Ammonium is:
A form of nitrogen that has a pistol e charge.
True or false: Mycorrhizal fungi are common in farm fields and gardens.
False
True or false: mycorrhizae have become much more abundant since humans switched to agriculture.
False
True or false: Ethnobotanist study the ethics of domesticating plants.
False they study how people of a particular culture and region make use of indigenous (native) plants.
True or false; agriculture began pretty much all around the world 10,000 years ago.
False, agriculture was around then just not all over the world.
Which of the following did not coincide with the beginning of agriculture?
- religion, science,etc
- domestication of plants
- plant breeding
- beginning of last ice age
-beginning of last ice age
True or false: Shattering had to be bred out of wild cereal crops so that the seed would stay in the seed head until the farmer can harvest it.
True
Which of the following is not a reason that botanists would use when arguing that plants domesticated humans?
- providing plants with the essential mineral elements
- widespread dispersal of plant populations
- uniformity of plant populations
- protection of plants from pests
-uniformity of plant populations
True or false: wheat was one of the first plants to be domesticated and its center of origins is the Middle East.
True
True or false: shattering is desirable in domesticated crops.
False, they try getting rid of it
True or false: feed barley is typically higher in protein than malting barley.
True
The answer is “a grass plant grown for its seeds.” What is the question?
- what is lysine?
- what is a Poacea?
- what is cereal?
- what is a Fabacea?
-what is cereal?
Why is soft white wheat the predominant wheat grown in eastern Washington?
Because dams in the Columbia a Snake River make it economically feasible to ultimately export wheat to Asia.
Which of the following two grass crops are typically fed to livestock?
- corn and barley
- corn and rice
- wheat and barley
- wheat and rice
-corn and barley
What is the significance of the rice and bean diet that so many people eat it?
It is an example of how humans can get essential amino acids from a plant based diet.
Nutritionally, rice and beans are a good combination because they:
Have a good balance of methionine and lysine.
True or false: meat consumption increase as affluence )the state of having a great deal of money; wealth.) increases.
True
What is the significance of the Southern corn leaf blight which occurred in the 1970s?
It was a major example of why monocultures (the cultivation of a single crop in a given area.) are risky.
What wild grass was our modern-day corn derived from?
Teosinte
Which of the following is NOT a major problem facing the worlds farmers?
- Increasing human populations
- new pest problems
- nitrogen fixation by Rhizobium (this should be italicized)
- reduces water availability
-nitrogen fixation by Rhizobium (this should be italicized)
