Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 26, Problem 19CTQ
The Triassic Period was marked by the increase in number and variety of
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Which two structures evolved though a series of changes in the reproductive biology among some heterosporous plants during the late Devonian period allowed spermatophytes (seed plants) to reduce or eliminate their dependence on water for gamete fertilization and development of the embryo and allowed them to colonize a much wider range of habitats?
Provide a full explanation for the adaptive radiation of insects and coevolution of insects and angiosperms (flowering plants) included pollination syndrome example. 
Suppose that plants in the San Francisco Bay area and in southern Chile share a common seed dispersal method. Scientists determine that the evolutionary divergence of these plants happened long before this seed dispersal method arose in each plant. What term relates the seed dispersal method of the San Francisco Bay plant to the seed dispersal method of the southern Chile plant? Explain your answer.
Chapter 26 Solutions
Biology 2e
Ch. 26 - Figure 26.8 At what stage dees the diploid zygote...Ch. 26 - Figure 26.15 If a flower lacked a megasporangium,...Ch. 26 - Seed plants are. all homosporous mostly...Ch. 26 - Besides the seed, what ether major structure...Ch. 26 - In which of the following geological periods would...Ch. 26 - Which of the following structures widens the...Ch. 26 - Which of the following traits characterizes gym...Ch. 26 - Megasporocytes will eventually produce which of...Ch. 26 - What is the ploidy of the following structures...Ch. 26 - In the northern forests of Siberia, a tall tree is...
Ch. 26 - Which of the following structures in a flower is...Ch. 26 - Pollen grains develop in which structure? the...Ch. 26 - In the course of double fertilization, one sperm...Ch. 26 - Corn develops from a seedling with a single...Ch. 26 - Which of the following plant structures is not a...Ch. 26 - White and sweet-smelling flowers with abundant...Ch. 26 - Abundant and powdery pollen produced by small,...Ch. 26 - Plants are a source of food fuel medicine all of...Ch. 26 - The Triassic Period was marked by the increase in...Ch. 26 - What role did the adaptations of seed and pollen...Ch. 26 - The Mediterranean landscape along the sea shore is...Ch. 26 - What are the four modern-day phyla of gymnosperms?Ch. 26 - Some cycads are considered endangered species and...Ch. 26 - What are the two structures that allow angiosperms...Ch. 26 - Biosynthesis of nectar and nutrient-rich pollen is...Ch. 26 - What is biodiversity and why is it important to an...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Many fungi are decomposers and degrade organic matter (such as wood and leaf litter). It has become clear that many of these decomposers are also able to colonize live plants as endophytes (living inside the plant without causing any harm) and allowing for prime access to plant tissues once the plant dies. Explain, using the principles of natural selection, how having the ability to be both a decomposer and endophyte evolved. Make sure you include the four steps of evolution by natural selection in your response.arrow_forwardExplain how polyploidy in plants can generate new plant species. Be sure to provide molecular detail. What barriers to reproduction cause speciation in this case?arrow_forwardClausen and colleagues proposed two hypotheses to explainthis variation within a species: (1) There are genetic differencesbetween populations of plants found at different elevations.(2) The species has developmental flexibility and can assumetall or short growth forms, depending on local abiotic factors.If you had seeds from yarrow plants found at low and highelevations, how would you test these hypotheses?arrow_forward
- What do these results suggest about the manner in which climate change can affect biodiversity and evolution?arrow_forwardFerns, such as the one in the picture, can be found today. they are usually found growing in warming climates. However, fossils of ferns have been found in places with cold climates where it often snows today. What can we conclude about the place where the fossils of ferns have been found? A) ferns used to live in cold climates. B) these places once had a warmer climate. C) these places once had a colder climate D) someone tired to grow ferns in cold climatesarrow_forwardA forest fire has destroyed all adult trees in an area. Pine seeds buried in the bark of the adults survived the blaze, fall to the ground, and germinate. As adult trees, they cast deep shade onto the soil. Maple seeds also survived the fire, but are unable to germinate until the pine trees are adult sized. Once they do germinate, the maple trees grow rapidly and replace the pine in the canopy. The most likely mechanism of succession describing the pine replacement is a) Competition b) Facilitation c) Tolerance d) Mutualismarrow_forward
- Analyses of fossils, pollen, and tree rings have shown a gradual change in climate throughout earth's history. Select at least one of the following: fossils, pollen, or tree rings, and explain how that data is used to show climate change over time. Be specific and include supporting details and examples from your lessons.arrow_forwardThe following evolutionary trends are seen in the seedless land plants. a. Gametophytes became photosynthetic. b. A key innovation accompanying the appearance of pterophytes was the haplodiplontic life cycle. c. The gametophyte generation became the dominant generation. d. There is increased protection of the sporophyte generation in its early developmental stages.arrow_forwardExplain how the evolution of alternation of generations is an adaptation for reproduction on land.arrow_forward
- Please connect the concepts in the first column with the definitions in the second columnarrow_forwardIn bryophytes, eggs are fertilized in a chamber on the ________ and a zygote develops into a _______. a. sporophyte; gametophyte b. gametophyte; sporophyte c. sorus; conearrow_forwardA botanist travels to an area that has experienced a long, severe drought. While examining the bryophytes in the area, he notices that many are in the same life-cycle stage. Which life-cycle stage should be the most common? a. zygote b. gametophyte c. sporophyte d. archegoniumarrow_forward
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