Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 39.3, Problem 2CC
MAKE CONNECTIONS How is the lunar-linked rhythm of fiddler crab courtship similar in mechanism and function to the seasonal timing of plant flowering? (See Concept 31.2.)
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Chapter 39 Solutions
Campbell Biology in Focus
Ch. 39.1 - Contrast the role of Ca2+ in the contraction of a...Ch. 39.1 - WHAT IF? Why are the muscles of an animal that has...Ch. 39.1 - Prob. 3CCCh. 39.2 - Prob. 1CCCh. 39.2 - Prob. 2CCCh. 39.2 - Prob. 3CCCh. 39.3 - Prob. 1CCCh. 39.3 - MAKE CONNECTIONS How is the lunar-linked rhythm of...Ch. 39.4 - How might associative learning explain why...Ch. 39.4 - Prob. 2CC
Ch. 39.4 - MAKE CONNECTIONS How might a learned behavior...Ch. 39.5 - Prob. 1CCCh. 39.5 - MAKE CONNECTIONS Balancing selection can maintain...Ch. 39.6 - Prob. 1CCCh. 39.6 - Prob. 2CCCh. 39 - During the contraction of a vertebrate skeletal...Ch. 39 - Prob. 2TYUCh. 39 - According to Hamiltons rule, A. natural selection...Ch. 39 - The binding of calcium to the troponin complex A....Ch. 39 - Curare, a substance that blocks the acetylcholine...Ch. 39 - Prob. 6TYUCh. 39 - Prob. 7TYUCh. 39 - SCIENTIFIC INQUIRY Propose a hypothesis to explain...Ch. 39 - Prob. 9TYUCh. 39 - Prob. 10TYUCh. 39 - FOCUS ON INFORMATION Learning is defined as a...Ch. 39 - Prob. 12TYU
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- EXPERIMENT 4: INDUCTION OF CALLUS SOMATIC EMBRYOGENESIS OF HAPLOID PLANTS Objective: To prepare anther as a source of explant To induce callus somatic embryogenesis of haploid plants Procedure: Cut off the buds and sort them into 3 developmental stages based on length of buds Surface sterilize the buds in 70% ethanol for 2-3 minutes, making sure the entire bud is immersed in the alcohol. Drain off excess alcohol from the buds and aseptically excise the anthers from each bud. Remove the filaments and culture the anther on one of the agar media provided. Label the stage of development of the bud on each petri dish as the anthers are cultured. Seal the Petri dishes with parafilm. Incubate in the dark at 26 to 28ºC for 4 to 8 weeks or until small plants can be seen growing out of the anthers. Then transfer to diffuse light. Record the results of the experiment in table form and submit the report. Observation: The culture was contaminated after 8 weeks of incubation…arrow_forwardThe drooping, bell-like flower Aquilegia canadensis is adapted for cross-pollination. However, if the plant has not been pollinated previously, self-pollination can occur. However, if cross pollination occurs after self-pollination takes place, the pollen from cross pollination reaches the style before the pollen from self-pollination. Using course concepts and vocabulary 1) Provide a reasoning for this phenomenon. 2) Would this adaptation for reproduction be beneficial for the plant?arrow_forwardMAKE CONNECTIONS Negative feedback is a processthat regulates biological systems (see Concept 40.2).Explain how the density-dependent birth rate of dunefescue grass exemplifies negative feedback.arrow_forward
- EVOLUTION CONNECTION In general, light-sensitivegermination is more pronounced in small seeds compared withgermination of large seeds. Suggest a reason whyarrow_forwardWhat are homeotic genes? Please exaplain ow they control the sequence of whorl development in flowers according to the ABCDE model.arrow_forwardConsider the following statements and indicate whether each presents an idea of Jean- Baptiste Lamarck, of Charles Darwin or of both scientists. On the blank before the statement, write L for Lamarck, D for Darwin or B for both. 1) An organism directs its own adaptations because of an inborn urge to be perfect (that is, to be better suited to the environment). 2) Individuals do not evolve, but populations do. 3) Individuals in a population exhibit variation in their traits, such that no two individuals are exactly alike. 1 4) Many different kinds of living things are adapted to their environment. 5) Members of a population who are better adapted to the environment have higher chances of survival and reproduction. 6) Parents pass on their traits to their offspring. Carrow_forward
- Biosynthesis 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_forwardCCASE Dashboard A gardener crosses two plants and observes that the offspring appear different from the parents. The diagram shows the plants. parents offspring Which statement supports this observation? O The plants reproduce asexually, and the offspring develop new genes with age. O The plants reproduce sexually, and the offspring exchange genes with each other. O The plants reproduce asexually, and the offspring receive all their genes from a single parent O The plants reproduce sexually, and the offspring receive a unique combination of genes from both parents.arrow_forwardThe oat coleoptiles of the seedlings (in the picture) have been modified: either cut or placed in a light-blocking tube. Explain which ones will stills bend toward a directional light source??arrow_forward
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