You find a new animal. It is a large, predatory marine vertebrate covered with scales. It has a two-chambered heart and gills, and its skeleton is made of cartilage. You should classify it as
A) Amphibia.
B) Actinistia.
C) Actinopterygii.
D) Reptilia.
E) Chondrichthyes.
E
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Bacteria and Archaea are general single-celled organisms, but some phyla form sheaths around multiple cells to facilitate attachment and filament formation
Indicate whether the statement is true or false.
Match the following items with the correct phrases.
_______1. Membrane-bound organelles where photosynthesis occurs. _______2. The sites of protein synthesis in procaryotic cells. _______3. Membrane-bound organelles where energy is produced by the Krebs cycle and electron transport chain. _______4. Short, hairlike projections that are used as organelles of locomotion by some eucaryotic cells. _______5. Found in procaryotic cells as well as eucaryotic cells. _______6. The sites of protein synthesis in eucaryotic cells.
Which technique(s) is/are used to help identify and classify bacteria?
A. Microscopic examination B. Culture characteristics C. Biochemical tests D. Nucleic acid analysis E. All of the choices are correct.
Which molecules are the most important for a cell to protect from damage if the cell is to stay alive and reproduce?
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids