. In the example just presented, natural selection should favor plants producing
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Question
. In the example just presented, natural selection should favor plants producing small seeds in wet environments and plants that produce larger seeds in dry environments, resulting in a difference in average seed size in these two environments. What might you expect in an environment where annual rainfall is relatively high during most years (wet) but in which periods of drought (dry) commonly persist for several years?
2. The seeds of shade-tolerant plant species are typically larger than those of shade-intolerant species. How might this difference refl ect a trade-off in life history characteristics relating to successful reproduction in sun and shade environments? See the discussion of shade tolerance in Chapter 6 and the Field Studies feature in that chapter.
Explanation / Answer
Hard seeds are presented in the regions of high rainfall with small size . They are more of legumionous plants.but then seeds starts to degenrate in the arid climate and more of the arid climate is present which help them to survive at that time.
Shade tolerant plant has higher growth rate in low light than intolerant At leaf scale the carbon gain hypothesis suggest that shade tolerant species have higher leaf cholorophyll contents and higher photosynthetic capacity
Due to smaller seed size the initial size of shade intolerant species is smaller. This smaller size is associated with lower Ma.
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