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Bio Lab Wksht & HW Questions 75

Bio Lab Wksht & HW Questions 75 - Are pomes true...

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70 Fleshy fruits like grapes and cherries often have distinct layers within the pericarp. The endocarp is the innermost portion around the seed(s). The skin of the fruit is the exocarp , and the fleshy region between the endocarp and exocarp is called the mesocarp . Can you observe these layers on the fleshy fruits provided? Berries (grapes and tomatoes) and drupes (peaches, plums, cherries and olives) are fleshy fruits composed of only ovary tissue (are they true or accessory fruits?). The mesocarp and endocarp of berries are both soft, and enclose many seeds. Drupes have a distinctive stony endocarp surrounding a single seed. The fleshy portion of pomes (apples and pears) is derived from receptacle tissue; only the core comes from the ovary.
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Unformatted text preview: Are pomes true fruits or accessory fruits? Sketch representative fleshy fruits. I. Environmental Adaptations: As described earlier, Angiosperms are by far the most diverse and widespread of all vascular plants, meaning that they are able to survive and reproduce in many different types of habitats. In part, this is due to the development of flowers, but be aware also that various vegetative modifications may be necessary to survive these seemingly extreme conditions. Examine the demonstration material available and for each specimen, describe what structure (i.e. leaf, stem or root) has been modified and for what purpose. Modified Leaf Examples Modified Stem Examples Modified Root Examples...
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