Concept explainers
Introduction:
The main goal in every plant’s life is a reproduction. When plant germinates from seed and then its own seeds come on it and it dies. This is called the life cycle. Some plants have a short life cycle while others can live up to decades. In gardening three terms are used forthe plant’s life cycle. Those are annual, biennial and perennial. Annuals are those plants whose life cycle is completed in one season or less than one year. For example, marigold flowers.
Biennial are those plants whose life cycle is completed in two years. In the first year, they make their roots strong and foliage grows on them and seeds will fully mature in the second year. For example, Carrots.
Perennial are those plants whose life cycle is completed in three years or more. Most of our evergreen ornamental plants are perennial.
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Principles of Biology
- Sieve tubes are part of ___________. a. cortex c. phloem b. mesophyll d. xylemarrow_forwardFrom environmental pressures to obtain and retain water, many plants developed to transport nutrients and water. Origid structures like branches and trunks seeds nonvascular tissues vascular tissues like xylem and phloemarrow_forwardOpenings in the plant body to allow for gas exchange are termed palisade cells collenchyma stomata spiraclesarrow_forward
- The term herbaceous implies that a plant -has no apical meristem. -probably will live several years. -lacks vascular tissue. -is only found in wet environments. -cannot develop secondary vascular tissue like secondary xylem.arrow_forwardWhich of the following is NOT an adaptation of land plants that provides protection for plant cells and tissues? Apical meristems Seeds Sporopollenin Antheridia and archegoniaarrow_forwardThe purpose of stomata found on land plants is to allow them to; release carbon dioxide and absorb oxygen absorb nutrients from their environment form gametophytes release oxygen and absorb carbon dioxidearrow_forward
- A cross-section of a root is shown in the diagram. Xylem Cortex Phloem Epidermis The labeled structures are classified as which of the following? Cells, because each structure consists of only one type of cell Tissues, because each structure is used for a specific function Organs, because each structure functions independently of the others Organisms, because these structures perform in an interconnected processarrow_forwardOne of the major differences between roots and leaves is roots have vascular tissue but leaves do not. root cells have cell walls and leaf cells do not. only leaves have phloem and only roots have xylem. a waxy cuticle covers leaves but it is absent in roots.arrow_forwardWhich of the following is most likely to be found in a desert environment? a. broad leaves to capture sunlight b. spines instead of leaves c. needle-like leaves d. wide, flat leaves that can floatarrow_forward
- 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…arrow_forwardAll of the statements concerning stomata are FALSE except stomata are absent in aquatic plants. stomata allow movement of nutrients into the plant. stomata allow gases to diffuse into and out of the plant. stomata open when guard cells shrink.arrow_forwardWhat are stomata? Living cells that form long, sieve-like tubes that transport carbohydrates. Non-vascular plants. Hollow vessels produced from dead cells that transport water and nutrient Small pores surrounded by two guard cells that allow water evaporation.arrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning