Answer the following question given this paragraph: Evolution of Birds The evolutionary history of birds is still somewhat unclear. Due to the fragility of bird bones, they do not fossilize as well as other vertebrates. Birds are diapsids, meaning they have two fenestrations or openings in their skulls. Birds belong to a group of diapsids called the archosaurs, which also includes crocodiles and dinosaurs. It is commonly accepted that birds evolved from dinosaurs. Dinosaurs (including birds) are further subdivided into two groups, the Saurischia ("lizard like") and the Ornithischia ("bird like"). Despite the names of these groups, it was not the bird-like dinosaurs that gave rise to modern birds. Rather, Saurischia diverged into two groups: One included the long-necked herbivorous dinosaurs, such as Apatosaurus. The second group, bipedal predators called theropods, includes birds. This course of evolution is suggested by similarities between theropod. Q: Birds belong to a group of diapsids called the what? Choices: - conifers - mammals - aviators - archosaurs A:
archosaurs
Answer the following question given this paragraph: The drummer in Figure below is hitting the drumheads with drumsticks. This causes the drumheads to vibrate. The vibrations pass to surrounding air particles and then from one air particle to another in a wave of energy called sound energy . We hear sound when the sound waves reach our ears. Sound energy can travel through air, water, and other substances, but not through empty space. That's because the energy needs particles of matter to pass it on. Q: What energy, produced by vibrations, cannot travel through empty space? Choices: - light - heat - plasma - sound A:
sound
Q: Answer the following question given this paragraph: Gastrin, which signals the secretion of gastric acid. Q: What signals the secretion of gastric acid? Choices: - hormone - pepsin - leptin - gastrin A:
A: gastrin
Question: Answer the following question given this paragraph: interconnected pathways through which carbon is recycled through the biotic and abiotic components of the biosphere. Q: Interconnected pathways through which carbon is recycled through the biotic and abiotic components of what? Choices: - atmosphere - ozone - hemisphere - biosphere A:
Answer: biosphere
*Question*
Answer the following question given this paragraph: Some of these pennies are shiny and copper colored. That's how pennies look when they are new. The older pennies are dull and brown. Copper at the surface of these pennies has combined with air to become a different substance with different properties. The change in color shows that a chemical change has occurred. Q: What type of change has occurred when a copper penny changes color? Choices: - contamination change - carbon change - reactive change - chemical change A:
**Answer**
chemical change
(Question)
Answer the following question given this paragraph: After fertilization, the zygote divides to form two cells: the upper cell, or terminal cell, and the lower, or basal, cell. The division of the basal cell gives rise to the suspensor, which eventually makes connection with the maternal tissue. The suspensor provides a route for nutrition to be transported from the mother plant to the growing embryo. The terminal cell also divides, giving rise to a globular-shaped proembryo (Figure 32.19a). In dicots (eudicots), the developing embryo has a heart shape, due to the presence of the two rudimentary cotyledons (Figure 32.19b). In non-endospermic dicots, such as Capsella bursa, the endosperm develops initially, but is then digested, and the food reserves are moved into the two cotyledons. As the embryo and cotyledons enlarge, they run out of room inside the developing seed, and are forced to bend (Figure 32.19c). Ultimately, the embryo and cotyledons fill the seed (Figure 32.19d), and the seed is ready for dispersal. Embryonic development is suspended after some time, and growth is resumed only when the seed germinates. The developing seedling will rely on the food reserves stored in the cotyledons until the first set of leaves begin photosynthesis. Q: After fertilization, how many cells does a zygote form into? Choices: - three - one - six - two A:
(Answer)
two