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Chapter 23: Problem 40

In the collection of a botanical garden, plants are classified according to the environments in which they thrive. What plant would have large leaves covered with a thick upper cuticle and wide flat blades and possess large air spaces (chambers) within its mesophyll tissue? a. a water lily floating on water b. a pine tree growing in the cold and dry taiga c. a cactus growing in a hot, sunny, and dry environment d. an orchid hanging from a tree in a tropical forest

Short Answer

Expert verified
a. a water lily floating on water

Step by step solution

01

- Understand the Question

Identify the characteristics described for the plant: large leaves covered with a thick upper cuticle, wide flat blades, and large air spaces within its mesophyll tissue.
02

- Analyze Each Option

Review each of the given options to see which one fits the described characteristics.
03

- Evaluate Option A

A water lily floating on water often has large flat leaves with a thick cuticle to prevent water loss and large air spaces for buoyancy. This fits the given description.
04

- Evaluate Option B

A pine tree growing in a cold and dry taiga typically has needle-like leaves and does not fit the description of large leaves with a thick cuticle and large air spaces.
05

- Evaluate Option C

A cactus growing in a hot, sunny, and dry environment has thick, fleshy stems and small or modified leaves, which does not fit the description provided.
06

- Evaluate Option D

An orchid hanging from a tree in a tropical forest generally has different features such as thick, leathery leaves but does not possess large air spaces within its mesophyll tissue.
07

- Conclusion

Based on the analysis, the water lily floating on water fits all the given characteristics of the plant described.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

plant adaptations
Plants have evolved various adaptations to survive in different environments. These adaptations are what allow them to thrive in specific conditions that might be hostile to other plant types. For example, the water lily has adapted to aquatic environments by developing large leaves with a thick cuticle. This cuticle helps reduce water loss while enabling the plant to float on the water surface. In contrast, a cactus has adapted to arid conditions by having thick, fleshy stems that store water and needle-like leaves that reduce water loss. Understanding these diverse adaptations is crucial for botanical classification and studying plant morphology.
mesophyll tissue
The mesophyll tissue in plants is integral for photosynthesis. It comprises two main types of cells: the palisade mesophyll and the spongy mesophyll. In plants like the water lily, the spongy mesophyll has large air spaces, which help maintain buoyancy and facilitate gas exchange. These air spaces are crucial for floating plants as they enable the plant to stay afloat and access sunlight more efficiently, while also allowing for easy gas diffusion required for photosynthesis. On the other hand, in dry and cold environments like the taiga, plants such as pine trees have dense mesophyll tissues to minimize water loss.
cuticle in plants
The cuticle is a waxy layer that covers the epidermis of plants, playing a vital role in preventing water loss. This is particularly significant in various plant adaptations. For instance, the water lily's thick cuticle helps it to thrive in water bodies by significantly reducing the rate of transpiration. In contrast, desert plants like cacti have a thick cuticle to protect them from excessive water loss in a hot, dry climate. Plants in different environments make use of their cuticle in unique ways to balance water retention and protection against environmental challenges.
botanical classification
Botanical classification involves grouping plants based on specific criteria such as morphology, genetics, and adaptation to environments. In the context of the exercise, plants were classified based on their ability to thrive in particular environments. For example, the water lily was correctly identified due to its large leaves with thick cuticle and air-filled mesophyll tissue, traits that help it float and survive in aquatic habitats. The classification helps botanists and students understand the diverse strategies plants employ to adapt to their surroundings, such as the needle-like leaves of pine trees in cold regions or the fleshy stems of cacti in deserts.

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Most popular questions from this chapter

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