The following is a description of which type of algae? They spin as they are propelled forward. They possess two flagella, each of which rests within a groove encircling the organism. When moving, the longitudinal flagellum extends behind the cell propelling it forward, while the transverse flagellum beats within its groove and spins the cell.
A) Rhodophyceae
B) Alveolata (Dinoflagellates)
C) Synurales
D) Xanthophyceae (Yellow-Green Algae)
E) Chrysophyceae: The Golden-Brown Algae
B) Alveolata (Dinoflagellates)
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Most simple invertebrates obtain their oxygen by diffusion directly from the surrounding
A. mud. B. air. C. water. D. blood.
The 5' and 3' designations used in reference to DNA and RNA sequences are assigned to the
A. oxygen atoms contained in the deoxyribose and ribose. B. hydrogen atoms that form hydrogen bonds between the nucleotides. C. nitrogen atoms in the nitrogen bases. D. carbon atoms in the nitrogen base purines and pyrimidines. E. carbon atoms of deoxyribose and ribose.
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Figure 45.4
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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
Adaptations to extreme cold
What will be an ideal response?