A) 500 million years ago
B) 125 million years ago
C) 60 million years ago
D) 10 million years ago
E) very recently
G) A) and D)
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A) It has only two leaves.
B) It obtains most of its moisture from fog.
C) It lives under desert conditions.
D) It is a gnetophyte.
E) It has all the attributes listed in the other choices.
G) A) and D)
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A) The peduncle and receptacle are identical, merely two names for the same structure.
B) The peduncle is haploid and the receptacle is diploid.
C) The peduncle is a reproductive part of a flower and the receptacle is a vegetative part.
D) The receptacle is the part of the flower that receives the pollen whereas the peduncle relays sperm to the ovule.
E) The peduncle is the tip of the stem bearing the flower and the receptacle is the base of the flower.
G) D) and E)
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A) ability to see colors at night
B) ability to see ultraviolet light
C) ability to distinguish blue, green, and red colors
D) ability to see reflected light
E) all of the other choices provided
G) A) and B)
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A) barcodes stamped on vegetables in the supermarket to indicate freshness
B) DNA sequences used to identify and catalog biodiversity
C) radioactively labeled genes used to detect horizontal transfer of genes
D) genetic inversions used to detect crossovers
E) All of the choices provided are incorrect.
G) C) and E)
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A) the synchronous release of pollen by many individuals of wind-pollinated trees
B) specializations of plants that attract a specific kind of pollinator
C) the simultaneous release of two sperm, one to affect fertilization and the other to initiate formation of endosperm
D) a brushlike tongue of hummingbirds to which pollen adheres
E) a series of bristles on the backs of insects to which pollen adheres
G) A) and D)
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A) antioxidants in red wine
B) the flavor of vanilla
C) absorption of ultraviolet radiation
D) the sweetness of honey
E) the taste of chillies
G) B) and D)
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A) The seeds have high levels of manganese that is a cause of dementia.
B) The seeds contain hallucinogenic drugs similar to LSD that causes dementia.
C) The seeds have enzymes that break down brain tissue causing dementia.
D) The seeds contain the amino acid BMAA that causes dementia.
E) The seeds have enzymes that inhibit absorption of nutrients that are essential for the transmission of nervous impulses in brain cells.
G) B) and E)
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A) morphine
B) caffeine
C) LSD
D) nicotine
E) heroin
G) B) and E)
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B) False
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B) False
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A) wear sweet-smelling perfumes
B) wear red shirts
C) wear dark, drab clothing
D) hum as you work
E) None of the choices provided are dangerous.
G) A) and C)
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A) the evolution of coenzymes
B) two species reciprocally influencing each other's evolution
C) random evolution not influenced by natural selection
D) evolution of secondary metabolites according to fixed ratios
E) coordinated evolution of sensory and motor pathways
G) A) and C)
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A) The roots grow in waterlogged soil and they need to protrude into the air in order to respire.
B) The branching of coralloid roots provides greater surface area for absorption of water.
C) It keeps roots above the ground where they cannot be attacked by parasitic nematodes.
D) The roots have mutualistic photosynthetic cyanobacteria that fix nitrogen for the cycad and the cyanobacteria can only survive if they are above ground where they are exposed to light.
E) The soil in which cycads live has a low pH that would kill the roots if they were completely below ground.
G) None of the above
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Correct Answer
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