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#Question id: 8924
#XL - R Botany
Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?
1. Protostomes invade terrestrial environments.
2. Cambrian explosion occurs.
3. Deuterostomes invade terrestrial environments.
4. Vertebrates become top predators in the seas.
TLS Online TPP Program
#Question id: 4630
#XL - S Microbiology
Which pair would have been likely to agree that strata such as those depicted here were deposited gradually over long periods of time by subtle mechanisms that are still at work?
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#Question id: 14998
#XL - T Zoology
You set up a monohybrid cross between true breeding round winged and true breeding oval winged insects. Your F1 offspring have round wings, and you collect the following numbers of F2: Round wings: 302; Oval wings: 86. Which of the following statements is NOT correct?
TLS Online TPP Program
#Question id: 19660
#XL - P Chemistry
When ethanol combines with PCl5, it produces three products: chloroethane, hydrochloric acid, and ______. What is the third item on the list?
TLS Online TPP Program
#Question id: 11333
#XL - T Zoology
Small geographic areas with high concentrations of endemic species and a large number of endangered and threatened species are known as