Based on this graph of vascular plant species on a volcanic island, at what point would you hypothesize that sea gulls began nesting on the island?
1.1998
2.1973
3.1965
4.1986
4
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Which two organisms should be used for quality control purposes to determine the validity of the indole reagent?
a. E. meningoseptica and Empedobacter brevis b. Chryseobacterium spp. and E. meningo-septica c. E. meningoseptica and Sphingobacterium multivorum d. Agrobacterium group and Sphingobacte-rium spiritivorum
Which of the following evidence obtained from fossil studies is generally accepted as marking the beginning of the hominids?
A. large brain development B. walking upright C. bipedalism D. development of lower limbs longer than forelimbs E. manufacture and use of tools
Decomposers recycle materials at __________
trophic level(s). a. the first b. the second c. the third d. the fourth e. any of these
The Gridley stain is more intense than the PAS
a. true b. false