A series of speciation events in ancestors of wheat led to modern wheat, which arose through ________
a. stasis
b. allopolyploidy
c. autopolyploidy
d. parapatric speciation
b
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Male Jarrow’s spiny lizards ordinarily exhibit strong territoriality only during the ____ mating season, when elevated
blood levels of ____ stimulate their aggressive behavior.
a. summer; estrogen b. summer; testosterone c. autumn; octopamine d. autumn; estrogen e. autumn; testosterone
The ________ expedition is accredited to the birth of modern marine biology and oceanography
a. HMS Challenger b. HMS Agassiz c. HMS Alvin d. HMS Beagle
One way embryonic cells can learn their position in an embryo is by detecting the concentration of a
What will be an ideal response?
Fall is coming, with the prospect of frost, so you decide to pick the last tomatoes on the vine even though they are still green. If you wanted to ripen these tomatoes, which method would be most effective?
A) Put the green tomatoes in a paper bag, and keep the top of the bag open. B) Put the green tomatoes in a dark closet, but with a flash of light about every 4 hours. C) Put the green tomatoes in a plastic bag with an overripe apple. D) Store each green tomato in a separate plastic bag and put them in the dark.