Answer the following question given this paragraph: When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between non-sister chromatids of homologous chromosomes. It results in new combinations of genes on each chromosome. Q: When do homologous chromosomes form pairs? A:
OPTIONS:
- mitosis
- metathesis
- transcripton
- meiosis
meiosis
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Answer the following question given this paragraph: Facial Bones of the Skull The facial bones of the skull form the upper and lower jaws, the nose, nasal cavity and nasal septum, and the orbit. The facial bones include 14 bones, with six paired bones and two unpaired bones. The paired bones are the maxilla, palatine, zygomatic, nasal, lacrimal, and inferior nasal conchae bones. The unpaired bones are the vomer and mandible bones. Although classified with the brain-case bones, the ethmoid bone also contributes to the nasal septum and the walls of the nasal cavity and orbit. Q: The paired bones of the skull are the palatine, zygomatic, nasal, lacrimal, inferior nasal conchae bones, and what else? A:
OPTIONS:
- minilla
- ventral
- elongated
- maxilla
maxilla
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Answer the following question given this paragraph: Animals and Plants: Herbivory Coevolution of flowering plants and insects is a hypothesis that has received much attention and support, especially because both angiosperms and insects diversified at about the same time in the middle Mesozoic. Many authors have attributed the diversity of plants and insects to pollination and herbivory, or consumption of plants by insects and other animals. This is believed to have been as much a driving force as pollination. Coevolution of herbivores and plant defenses is observed in nature. Unlike animals, most plants cannot outrun predators or use mimicry to hide from hungry animals. A sort of arms race exists between plants and herbivores. To "combat" herbivores, some plant seedssuch as acorn and unripened persimmonare high in alkaloids and therefore unsavory to some animals. Other plants are protected by bark, although some animals developed specialized mouth pieces to tear and chew vegetal material. Spines and thorns (Figure 26.18) deter most animals, except for mammals with thick fur, and some birds have specialized beaks to get past such defenses. Q: What hypothetical link between development of herbivores and plant defenses is observed in nature, for instance in seeds that are unsavory to animals? A:
OPTIONS:
- interconnection
- abjection
- natural selection
- coevolution
coevolution
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Answer the following question given this paragraph: The energy that the object gains or loses when traveling through a potential difference is supplied (or absorbed) by the electric field --- there is nothing else there. Therefore, it follows that electric fields contain energy . Q: Where does an object gain or lose it's energy to during travel through a potential difference? A:
OPTIONS:
- particle field
- magnetic field
- wave field
- electric field
electric field
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