Bio chapter 10
Leaves of green plants contain openings known as stomates, which are opened and closed by specialized cells allowing for gas exchange between the leaf and the outside environment. Which phrase best represents the net flow of gases involved in photosynthesis into and out of the leaf through these openings on a sunny day? 1. Carbon dioxide moves in; oxygen moves out 2. Carbon dioxide and oxygen move in; ozone moves out 3. Oxygen moves in; nitrogen moves out 4. Water and ozone move in; carbon dioxide moves out
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Much of the carbon dioxide produced by green plants is not excreted as a metabolic waste because it 1. Can be used for photosynthesis 2. Is too large to pass through cell membranes 3. Is needed for cellular respiration 4. Can be used for the creation of proteins
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Some sea slugs store chloroplasts obtained from algae they have ingested. The chloroplasts continue to carry out photosynthesis within the slugs. What advantage would this activity be to these sea slugs? 1. The slugs with chloroplasts can synthesize some of their own food 2. The slugs with chloroplasts no longer need to carry out respiration 3. The chloroplasts provide the slugs with camouflage that protects them from UV radiation 4. The chloroplasts contain enzymes that allow the slugs to digest starch
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The dissolved carbon dioxide in a lake is used directly by 1. Producers 2. Parasites 3. Fungi 4. Decomposers
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The synthesis of carbohydrates occurs in the stroma of chloroplasts. This process uses energy supplied by 1. ATP 2. CO2 3. PGAL 4. O2
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During the process of photosynthesis, energy from the sun is converted into 1. Chemical energy in the bonds of inorganic molecules 2. Chemical energy in the bonds of organic molecules 3. Enzymes used to produce inorganic molecules 4. Enzymes used to produce organic molecules
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Which type of organism helps to reduce atmospheric carbon dioxide? 1. Carnivores 2. Producers 3. Decomposers 4. Herbivores
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Autotrophs differ from heterotrophs in that only autotrophs 1. Require carbon dioxide for cellular respiration 2. Release oxygen as a product of cellular respiration 3. Synthesis nutrients using carbon dioxide and water 4. Break down sugars to assemble other molecules
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Chlorophyll gives plants their green color. Chlorophyll is produced only when plants are exposed to light, so plants kept in darkness have no chlorophyll and appear white. The best explanation for this is that 1. Chlorophyll is not needed by green plants at night 2. Darkness mutates the chlorophyll genes, causing them to produce a white color 3. Light is required for chlorophyll genes to be expressed 4. Genetic information in cells is not influenced by the outside environment
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The interaction between guard cells and a leaf opening would not be involved in 1. Diffusion of carbon dioxide 2. Maintaining homeostasis 3. Heterotrophic nutrition 4. Feedback mechanisms
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Which process uses energy to combine inorganic molecules to synthesize organic molecules? 1. Respiration 2. Digestion 3. Photosynthesis 4. Decomposition
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Maples trees and tulips are classified as autotrophs because they both 1. Produce gametes by the process of mitosis 2. Produce carbon dioxide and water as metabolic wastes 3. Are able to obtain complex organic materials from the environment 4. Are able to synthesis organic molecules from inorganic raw materials
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Starch molecules present in a maple tree are made from materials that originally entered the tree from the external environment. What form are these materials in before entering the tree? 1. Enzymes 2. Simple sugars 3. Amino acids 4. Inorganic compounds
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The most likely result of completely removing carbon dioxide from the environment of a plant is that sugar production will 1. Continue at the same rate 2. Increase and oxygen production will also increase 3. Increase and oxygen production will stay the same 4. Decrease and eventually stop
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Which statement best describes animals that are heterotrophs? 1. They are able to convert light energy into useful chemical bond energy 2. They are able to synthesize organic materials from inorganic raw materials 3. They are unable to consume preformed organic compounds 4. They are unable to synthesize organic materials from inorganic raw materials
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