Which of the following is NOT a way that humans benefit from plants today? Plants are a source of food. Plants contribute to the oxygen in our atmosphere. Plants provide medicinal compounds. Plants contribute to the formation of fossil fuels.
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- As you learned in this chapter, many prescription drugs are derived from natural plant products. Numerous other plant substances, including caffeine and nicotine, have effects in the human body, as well. There is also a wide array of plant products, in the form of pills, powders, or teas, marketed as herbal medicines. Some people prefer taking these “natural” products to pharmaceuticals. Others use herbal supplements to boost energy, promote weight loss, strengthen the immune system, relieve stress, and more. The U.S. Federal Drug Administration, which approves pharmaceuticals, is also responsible for regulating herbal remedies. What does the label “FDA-approved” on an herbal remedy mean? How does that compare to FDA approval of a drug? The FDA website http://www.fda.gov/ForConsumers/default.htm is a good place to start your research. (Note that the FDA classifies herbal remedies as dietary supplements.)Which statement regarding plants is false? They are sources of medicines. They modify Earth's atmosphere. They decrease soil erosion. They decrease humidity. They are primary producers.Which of the following are examples of how plants can either benefit or fool herbivores or pollinators? A flower produces nectar to attract bees. A plant produces thorns to deter herbivores. A flower mimics the appearance of a female insect to attract male pollinators. A plant produces a fruit that contains seeds, which are then dispersed by the animal that eats the fruit. A plant grows taller to reach more sunlight.
- Which one of the following statements is INCORRECT? A bacteria and fungi help plants to return minerals to the soil Plant depends on animals for food and shelter. Animals need plants as a source of food Plant relies on animals to help them scatter their seeds.Leaves typically have high surface area to volume ratios to maximize the rate of photosynthesis. Plants in which environments might have leaves with reduced surface area? tropical rainforests deserts aquatic environments (e.g. pond lilies) all of the above none of the aboveWhich of the following were key innovations that allowed plants to survive on land and not dry out? Roots Flowers Lignin in stems A waxy cuticle
- Plant shoots include stems, leaves, and flowers. Monocot stems have their vascular bundles arranged in a ring pattern in the ground tissue. Eudicots have their leaf veins arranged in a parallel pattern. Photosynthesis in leaves takes place in the mesophyll layer Eudicots possess a large taproot.T/F Question Parenchyma is soft, internal plant tissue. Xylem and phloem are plant structural tissue. Periderm tissue is a type of plant epidermis in young stems and roots. Plant shoots include stems, leaves, and flowers. Monocot stems have their vascular bundles arranged in a ring pattern in the ground tissue. Eudicots have their leaf veins arranged in a parallel pattern. Photosynthesis in leaves takes place in the mesophyll layer Eudicots possess a large taproot. The limiting factor for plants is phosphorus. Root hairs help to decrease the absorbtive surface area of a plant. Xylem conducts plant sugars and organic molecules. Plant tissues grow from meristem cells that continually divide during the growing season. Primary plant growth involves thickening of the stems and roots. Plants can undergo asexual reproduction without cross-pollination. The fertilization process in plants is a double fertilization process. Over 1/3 of the U.S. food supply comes from the cross-pollination…I took this picture of this plant using my phone. The thin brown stalks that you see are. approximately 2 centimeters tall (a little less than 1 inch). The flat green leaves of this plant represent: The sporophyte generation The gametophyte generation
- Land plants have evolved several adaptations to survive life on land. Which of the following are adaptations that help plants conserve and utilize water? (Select all that apply) Cuticle Stomata Flowers Vascular systemWhich of the following is NOT an adaptation of land plants that provides protection for plant cells and tissues? Apical meristems Seeds Sporopollenin Antheridia and archegoniaSome plants in wetter climates release certain chemicals in response to leaf consumption by insects. These chemicals may either repel the leaf-eaters and/or attract other insects that will consume the leaf-eaters. A researcher was interested in whether desert plants emitted the same types of compounds. Desert plants have different kinds of leaves compared to plants from less arid areas. The researcher harvested Coville’s lip fern (Cheilanthes covillei) from deserts in Utah to bring into a greenhouse. The plants were 12 – 15 cm (5 – 6 in) tall. Each plant was placed in a separate pot, and there were 40 pots in all. Each pot was assigned to one of four “leaf eater” treatments: a control (i.e., no insects); 5 hornworms; 5 leaf bugs; or 5 flea beetles. Then the researcher measured the emission rate of a particular repelling compound from each plant once every hour for a total of 8 hours (8:00 am – 4:00 pm). Based on this scenario, please answer the following questions: a) What is the…