The relationship between the sea anemone and a pink anemonefish shown above is ____
a. a parasitic association
b. predation
c. resource partitioning
d. a mutualistic association
e. an epiphytic relationship
ANSWER: d
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How many of the following are characteristics of at least some members of the phylum Cnidaria?
1. a gastrovascular cavity 2. a polyp stage 3. a medusa stage 4. cnidocytes 5. a pseudocoelom A) 1 B) 2 and 3 C) 3, 4 and 5 D) 1, 2, 3, and 4 E) 1 and 2
Vessel elements must be thinner and shorter than tracheids because they lack the structural integrity to support large angiosperm trees
A. true B. false
The designation of winds is referenced from
a. the direction from which they are coming. b. the direction towards which they are going. c. folk lore. d. the need to throw horses overboard. e. the direction in relation to the observer's path of travel
In what ways are hydrogen bonds and ionic bonds similar?
A) Both involve an even sharing of electrons between atoms. B) Both are based on attraction between two atoms that carry positive charges. C) Both are based on repulsion between atoms that carry differences in electrical charge. D) Both are based on attraction between atoms that carry differences in electrical charge. E) Both are based on attraction between two atoms that carry negative charges.