Answer the following question given this paragraph: Many metals react with acids to produce hydrogen gas. A certain reaction produces 86.5 L of hydrogen gas at STP. How many moles of hydrogen were produced?. Q: Many metals react with acids to produce what gas? Choices: - neon - mercury - helium - hydrogen A:
hydrogen
Answer the following question given this paragraph: Plants have specialized organs that help them survive and reproduce in a great diversity of habitats. Major organs of most plants include roots, stems, and leaves. Leaves are the keys not only to plant life but to all terrestrial life. The primary role of leaves is to collect sunlight and make food by photosynthesis . Despite the fundamental importance of the work they do, there is great diversity in the leaves of plants. However, given the diversity of habitats in which plants live, it's not surprising that there is no single best way to collect solar energy for photosynthesis. Q: The primary role of leaves is to collect what? Choices: - pollen - insects - precipitation - sunlight A:
sunlight
Q: Answer the following question given this paragraph: Protection. The skeleton supports and protects the soft organs of the body. For example, the skull surrounds the brain to protect it from injury. The bones of the rib cage help protect the heart and lungs. Q: What supports and protects the soft organs of the body? Choices: - Skin - skull - Muscle - skeleton A:
A: skeleton
Question: Answer the following question given this paragraph: Plant-like protists are called algae. They include single-celled diatoms and multicellular seaweed. Q: What are plant-like protists called? Choices: - fungi - sponge - spores - algae A:
Answer: algae
*Question*
Answer the following question given this paragraph: Streptophytes Until recently, all photosynthetic eukaryotes were considered members of the kingdom Plantae. The brown, red, and gold algae, however, have been reassigned to the Protista kingdom. This is because apart from their ability to capture light energy and fix CO2, they lack many structural and biochemical traits that distinguish plants from protists. The position of green algae is more ambiguous. Green algae contain the same carotenoids and chlorophyll a and b as land plants, whereas other algae have different accessory pigments and types of chlorophyll molecules in addition to chlorophyll a. Both green algae and land plants also store carbohydrates as starch. Cells in green algae divide along cell plates called phragmoplasts, and their cell walls are layered in the same manner as the cell walls of embryophytes. Consequently, land plants and closely related green algae are now part of a new monophyletic group called Streptophyta. The remaining green algae, which belong to a group called Chlorophyta, include more than 7000 different species that live in fresh or brackish water, in seawater, or in snow patches. A few green algae even survive on soil, provided it is covered by a thin film of moisture in which they can live. Periodic dry spells provide a selective advantage to algae that can survive water stress. Some green algae may already be familiar, in particular Spirogyra and desmids. Their cells contain chloroplasts that display a dizzying variety of shapes, and their cell walls contain cellulose, as do land plants. Some green algae are single cells, such as Chlorella and Chlamydomonas, which adds to the ambiguity of green algae classification, because plants are multicellular. Other algae, like Ulva (commonly called sea lettuce), form colonies (Figure 25.7). Q: Cells in green algae divide along cell plates called what? Choices: - chloroplasts - cellulose - xanthophylls - phragmoplasts A:
**Answer**
phragmoplasts
*Question*
Answer the following question given this paragraph: The Role of Blood in the Body Blood, like the human blood illustrated in Figure 40.5 is important for regulation of the body's systems and homeostasis. Blood helps maintain homeostasis by stabilizing pH, temperature, osmotic pressure, and by eliminating excess heat. Blood supports growth by distributing nutrients and hormones, and by removing waste. Blood plays a protective role by transporting clotting factors and platelets to prevent blood loss and transporting the disease-fighting agents or white blood cells to sites of infection. Q: Blood helps maintain homeostasis by stabilizing ph, temperature, osmotic pressure, and by eliminating this? Choices: - toxins - acid - water - excess heat A:
**Answer**
excess heat