Select the best choice for the following statements in reference to the classes listed below.
A. Members of this class have cartilaginous skeletons but also possess jaws.
B. Members of one unusual group may have been ancestors of tetrapods.
C. Members of this class are fully terrestrial except for reproduction.
D. Some species of this class live in water but are not dependent upon an aquatic environment.
A. Cartilaginous fishes
B. Bony fishes
C. Amphibians
D. Reptilians
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The following question(s) relate to the data table below, showing typical fluctuating pH and dissolved oxygen levels in a fish pond with a heavy concentration of algae over a 24-hour period.TimeOxygen (ppm)pH2 a.m.4.57.74 a.m.2.87.26 a.m.2.26.88 a.m.2.56.810 a.m.3.97.2Noon6.57.72 p.m.10.08.34 p.m.12.18.86 p.m.13.19.28 p.m.13.09.210 p.m.12.08.8Midnight10.88.3In such a pond that contains algae and fish, what is happening to the oxygen?
A. Oxygen is only consumed by the fish B. Oxygen is only consumed by both the algae and the fish C. Oxygen is only produced by the algae D. Oxygen is produced by the algae, and consumed by the algae and the fish
The processes listed below represent major chemical pathways in
photosynthesis. Respond to statements 80–84 with reference to these five processes. a. light-dependent reactions b. chemosynthetic reactions c. carbon dioxide fixation d. Calvin-Benson cycle e. C4 pathway D 80. This leads to the formation of a glucose-6-phosphate from two molecules of phosphoglyceraldehyde. M 81. In this process carbon dioxide is incorporated first into an unstable intermediate compound and then into phosphoglycerate. E 82. This yields NADPH as well as ATP. M 83. This is a carbon-fixing system that precedes the Calvin-Benson cycle in some plants. M 84. PGAL molecules are formed from the reaction of PGA molecules with ATP and NADPH in this pathway.
The carrying capacity (K) of a population can vary depending on the supply of resources
Indicate whether the statement is true or false
Salmonella (lactose NON-fermenter &hydrogen sulfide producing bacteria) growing on the Salmonella-Shigella Agar will appear as
A. Clear colonies with have black centers due to precipitation of iron salt B. Clear or amber colonies C. Blue-black colonies D. Pink or red colonies E. Blue-black colonies with green metallic sheen