Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 38.2, Problem 1R
Summary Introduction
To review:
The role of latex, which is harvested to make rubber, in trees.
Introduction:
Latex is a milky fluid, which is present in some plants. It is composed of alkaloids, sugars, tannins, oils, gums, proteins, and resins. It has the property of getting coagulated when it is exposed to air. It is found is almost 10% of
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Chapter 38 Solutions
Life: The Science of Biology
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- Gymnosperm A) How are the seeds of pine trees dispersed away from the parent plant? b) Suggest an advantage of dispersing seeds away from parent plants.arrow_forwardWhat adaptation do seed plants have in addition to the seed that is not found in seedless plants? a. gametophytes b. vascular tissue c. pollen d. chlorophyllarrow_forwardWhy do living trees not rot? Redwood trees, forexample, can live for centuries, but once they die theydecay fairly quickly. What might this suggest?arrow_forward
- The function of pits in the walls of tracheids is -to stop the backflow of water. -to seal off air bubbles. -to allow the passage of water. between cells -the secretion of resin. -to allow the escape of air.arrow_forwardHow does the petiole aid in the photosynthetic function of the leaves? Which leaf shape predominates in rainy regions? Why? Which leaf shape predominates in dry regions? Why? Name five plants whose leaves have economic importance. Indicate what it is used for.arrow_forwardWhy do desert plants that live in very hot and dry conditions have stomata? a. To allow for transpiration b. To allow for gas exchange c. To allow for the release of excess heat d. Both a and b are correct.arrow_forward
- What type of seed dispersal does it represent? a. Zoocora b. anemocora c. autocora d. hydrocoraarrow_forwardThe color of a bark is largely due to...?arrow_forwardIn a practice known as crop rotation, farmers alternate a crop of legumes (plants like beans, whose roots bear nodules containing Rhizobium) with a crop of non- legumes. What is the benefit of this practice?arrow_forward
- What type of plant is that?arrow_forwardDicotyledonous weeds are destroyed by a chemical calledarrow_forwardWhich cells are responsible for the movement of photosynthates through a plant? a. tracheids, vessel elements b. tracheids, companion cells c. vessel elements, companion cells d. sieve-tube elements, companion cellsarrow_forward
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