Answer the following question given this paragraph: How Light-Dependent Reactions Work The overall purpose of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy will be used by the Calvin cycle to fuel the assembly of sugar molecules. The light-dependent reactions begin in a grouping of pigment molecules and proteins called a photosystem. Photosystems exist in the membranes of thylakoids. A pigment molecule in the photosystem absorbs one photon, a quantity or "packet" of light energy, at a time. A photon of light energy travels until it reaches a molecule of chlorophyll. The photon causes an electron in the chlorophyll to become "excited. " The energy given to the electron allows it to break free from an atom of the chlorophyll molecule. Chlorophyll is therefore said to "donate" an electron (Figure 5.12). To replace the electron in the chlorophyll, a molecule of water is split. This splitting releases an electron and results in the formation of oxygen (O2) and hydrogen ions (H+) in the thylakoid space. Technically, each breaking of a water molecule releases a pair of electrons, and therefore can replace two donated electrons. Q: The overall purpose of the light-dependent reactions is to convert light energy into this? Choices: - photosynthesis - thermal energy - calories - chemical reactions A:
chemical reactions
(Question)
Answer the following question given this paragraph: Metallic Iron"). Instead, the rust continually flakes off to expose a fresh metal surface vulnerable to reaction with oxygen and water. Because both oxygen and water are required for rust to form, an iron nail immersed in. Q: Oxygen and what are required for rust to form? Choices: - carbon - pressure - air - water A:
(Answer)
water
Ques: Answer the following question given this paragraph: Xylem carries water and dissolved minerals from the roots upward to the leaves. Q: What type of plant tissue transports water and dissolved mineral upward to the leaves? Choices: - collagen - ectoderm - phloem - xylem A:
Ans: xylem
(Q).
Answer the following question given this paragraph: Irrigation is the single biggest use of water. Overhead irrigation wastes a lot of water. Drip irrigation wastes a lot less. Figure below shows a drip irrigation system. Water pipes run over the surface of the ground. Tiny holes in the pipes are placed close to each plant. Water slowly drips out of the holes and soaks into the soil around the plants. Very little of the water evaporates or runs off the ground. Q: Does overhead irrigation or drip irrigation use less water? Choices: - mist irrigation - stream irrigation - constant flow - drip irrigation A:
(A).
drip irrigation
Ques:Answer the following question given this paragraph: This tissue includes several types of specialized cells. Pavement cells, large, irregularly shaped parenchymal cells which lack chloroplasts, make up the majority of the epidermis. Within the epidermis, thousands of pairs of bean-shaped schlerenchymal guard cells swell and shrink by osmosis to open and close stomata , tiny pores which control the exchange of oxygen and carbon dioxide gases and the release of water vapor. The lower surfaces of some leaves contain as many as 100,000 stomata per square centimeter. Q: Pavement cells, large, irregularly shaped parenchymal cells which lack chloroplasts, make up the majority of what? Choices: - dermis - layers - Skin - epidermis A:

Ans:epidermis
Question: Answer the following question given this paragraph: Q: Plants have a touch response known as what? Choices: - trichina - pollenation - photosynthesis - thigmotropism A:
Answer:
thigmotropism