Concept explainers
To explain: “Tepals” on the basis of ABC hypothesis.
Concept introduction: In plants, transition from vegetative to reproductive phase is marked by production of flowers. Flowering is induced by day length and certain chemicals called hormones. “Floral meristem identity genes” play an important role in flowering.
The development of floral pattern is regulated by various organ identity genes. These genes belong to the MADS-box family. These genes encode transcription factors that regulate the expression of other genes and thereby produce a peculiar floral pattern. The floral pattern consists of four whorls that appears as concentric circles when viewed from the top.
Want to see the full answer?
Check out a sample textbook solutionChapter 35 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
- Discuss Concepts Compare the size, anatomical complexity, and degree of independence of a Douglas fir female gametophyte and a dogwood female gametophyte. Which one is the most protected from the external environment? Which trend(s) in plant evolution does your work on this question bring to mind?arrow_forwardGive answer.arrow_forward. WHAT IF? If flowers had shorter styles, pollen tubeswould more easily reach the embryo sac. Suggest anexplanation for why very long styles have evolved inmost flowering plants.arrow_forward
- Hello , Happy New Year. I do hope that you can help me about this. This is my report regarding biology. It needs parameters and observation. Thank you in advance ❤️arrow_forwardGive typing answer with explanation and conclusionarrow_forwardBiosynthesis of nectar and nutrient-rich pollen is energetically very expensive for a plant. Yet, plants funnel large amounts of energy into animal pollination. What are the evolutionary advantages that offset the cost of attracting animal pollinators?arrow_forward
- QNO-4: Describe the inflorescences of Asteraceae , Poaceae and Euhorbiaceae .arrow_forwardhelparrow_forwardDiscuss Concepts Baobab trees (Adansonia spp.) store water in their trunks (stems) and, although the trees have leaves, considerable photosynthesis also occurs in the trunks. Cacti too have water-storing, photosynthetic stems. In terms of evolutionary adaptation, what does this information suggest about cacti and baobabs?arrow_forward
- do explain.arrow_forward. MAKE CONNECTIONS Does the life cycle of humanshave any structures analogous to plant gametophytes?Explain your answer. (See Figures 13.5 and 13.6.)arrow_forwardMAKE CONNECTIONS In seed plants, how might retaining the gametophyte within the sporophyteaffect embryo fitness? (See Concepts 17.5, 23.1, and 23.4 to review mutagens, mutations, and fitness.)arrow_forward
- Biology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
- Biology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781337408332Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning