Mastering Biology with Pearson eText -- Standalone Access Card -- for Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321833143
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 38, Problem 9TYU
Summary Introduction
To determine: How self-incompatible species are in severe population bottleneck compared to self-fertile species.
Concept introduction: Self-incompatibility is a genetic mechanism in
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Sexual reproduction in plants provides genetic variation. What are the benefits of this genetic
variation?
O If a population is presented with a rapid change in the environment or a chronic new pathogen or herbivore,
then genetic variability would increase the chances of survival of the population.
O Sexual reproduction produces less genetic variations which enables a population to co-evolve with other
organisms in it's ecosystem.
O Sexual reproduction reduces genetic variations which enables a population to take advantage of different
resources in it's ecosystem enabling it to exist in a the same niche as others that use the original resources.
O Sexual reproduction will always produce a more fit organism.
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XE
A
AY9 Week9_ng....xlsx
Week 9 Pre-lab.pdf
10.7591 978150...
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MacBook Air
Copy of Lab 9 A....pdf
Course: Botany
In stable populations, ones that are neither increasing nor decreasing in abundance (e.g., there are a million trees now and there will be a million trees a thousand years from now), about how many of a plant’s seeds survive and grow to adulthood, being able to replace it when it dies? If during the plant’s lifetime it produces 100,000 seeds, how many do not survive, do not grow, and cannot replace it when it dies. (Hint: Do not think of humans, as we are an increasing population, not a stable one. Almost all our children survive, but that is not true of any other species.) Answer and explain briefly.
Flowers whose throats (nectaries) are too long for hummingbirds to reach their nectar are unlikely to be pollinated (nectar reward isn't available) and therefore the flower is unlikely to reproduce. But if the nectaries are too short, hummingbirds can get their nectar without pollinating them because they don't reach in far enough to touch the pollen-carrying anthers, thus no reproduction for the flower. Flowers evolve with an intermediate length of nectaries. This is an example of what sort of selection?
Group of answer choices
Disruptive
Stabilizing
Directional
Sexual
Chapter 38 Solutions
Mastering Biology with Pearson eText -- Standalone Access Card -- for Campbell Biology (10th Edition)
Ch. 38.1 - Distinguish between pollination and fertilization.Ch. 38.1 - Prob. 2CCCh. 38.1 - Prob. 3CCCh. 38.1 - Prob. 4CCCh. 38.2 - What are three ways that flowering plants avoid...Ch. 38.2 - Prob. 2CCCh. 38.2 - Prob. 3CCCh. 38.3 - Compare traditional plant-breeding methods with...Ch. 38.3 - Why does Bt maize have less fumonisin than non-GM...Ch. 38.3 - WHAT IF? In a few species, chloroplast genes are...
Ch. 38 - What changes occur to the four types of floral...Ch. 38 - Prob. 38.2CRCh. 38 - Prob. 38.3CRCh. 38 - A fruit is (A) a mature ovary. (B) a mature ovule....Ch. 38 - Prob. 2TYUCh. 38 - Prob. 3TYUCh. 38 - Prob. 4TYUCh. 38 - Prob. 5TYUCh. 38 - A small flower with green petals is most likely...Ch. 38 - The black dots that cover strawberries are...Ch. 38 - DRAW IT Draw and label the parts of a flower.Ch. 38 - Prob. 9TYUCh. 38 - Prob. 10TYUCh. 38 - SCIENCE, TECHNOLOGY, AND SOCIETY Humans have...Ch. 38 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 38 - Prob. 13TYU
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- Intraspecific competition is a competition between members of the same species and is commonly observed in crop plants. Table 6.2 shows the results of a greenhouse experiment which examined the effects of density on the germination and growth of barley. Plants were grown for two weeks in 10- cm diameter pots kept in identical environmental conditions and watered regularly. At the end of the experiment the plants were cropped by cutting the stems at the soil surface. Based from the given table and graph, discuss the data and the relationship of the two factors (Mean wet biomass of plants (g) and Number of plants that germinated). Then, what is the effect of density to the Mean wet biomass of plants?arrow_forwardConsider why there might be natural selection for poisonous plants to warn potential herbivores with bright colors, but why there seems to be no similar selective pressure for poisonous mushrooms to do the same. Which of the following best explains this difference? a) Fungi, like mushrooms, do not rely on photosynthesis and hence do not need to attract or warn herbivores with bright colors. Plants have a symbiotic relationship with herbivores, which is not the case for mushrooms. Mushrooms are typically more toxic than plants, so there is no need for them to develop warning colors. Most of a fungus's body is the mycelium which exists underground, hence consumption of the above-ground mushroom cap represents a comparatively smaller fitness cost than for plants, whose vital photosynthetic structures can be consumed by herbivores.arrow_forwardSexual vs. Asexual Reproduction: Which statement below is not true about asexual reproduction in plants. Less energy needed for reproduction as it is strictly mitosis, no sexual organs or gametes need to be produced. O If the parent plant with it's genome did well in a location then a clone will do equally as well in the same location. Reproduction is seasonal and will only take place once a year. O Vegetative structures may be used to go through dormancy periods (bulbs, tubers,etc). X= A A AY9 Week9_ng....xlsx Week 9 Pre-lab.pdf 10.7591 A MacBook Air y of Lab 9 A....pdfarrow_forward
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