With the extinction of the dinosaurs 65 million
years ago, multiple niches that the dinosaurs
once filled opened up and allowed mammals
the opportunity to evolve and exploit those
niches. In other words, mammals underwent
a(an)
a. sympatric speciation.
b. adaptive radiation.
c. exaptation.
d. behavioral isolation.
e. phylogenetic isolation
B
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Identify the stage of cellular respiration that occurs entirely outside of the mitochondria.
A. Electron transport chain B. Citric acid cycle C. Glycolysis D. All of the above occur outside of the mitochondria
Which is the correct horizontal pathway of water from the soil to the center of the root?
a. epidermis ? root hair ? cortex ? pericycle ? endodermis ? xylem b. epidermis ? cortex ? pericycle ? endodermis ? phloem ? xylem c. root hair ? epidermis ? cortex ? endodermis ? pericycle ? xylem d. root hair ? cortex ? endodermis ? pericycle ? epidermis ? xylem e. root hair ? epidermis ? endodermis ? cortex ? xylem ? phloem
Two users of an internet gardening site are arguing. Sarah, an organic gardener from Maine, refers to her snapdragon plants as "annuals." Marco, a farmer from Italy, scoffs and declares them "perennials." Who is right?
A. They are both right. In a Mediterranean climate, the snapdragon re-emerges from its rootstock each spring. In colder climes, it must be replanted each year. A plant that is perennial in its native habitat may be an annual in other climates. B. Sarah is right. A snapdragon plant only returns for 3-4 years, and thus is not a true perennial. C. Marco is right. With enough inorganic fertilizer, the snapdragon can regrow. All "annuals" are just undernourished perennials. D. They are victims of bad translation software. The plant Marco refers to reseeds itself year after year and thus is a perennial.
Which region of the brain contains the olfactory cortex?
A. frontal lobe B. brain stem C. pons D. temporal lobe E. parietal lobe