Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 18, Problem 4FIB
The Sperm of early land plants had to reach the egg by__________ limiting them to ___________ environments. An important adaptation of plants to dry land was the evolution of which enclosed sperm in a drought-resistant coat.
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Chapter 18 Solutions
Biology
Ch. 18.1 - How Would the experiments result charge if oxygen...Ch. 18.1 - describe a likely scenario for the origin of life?Ch. 18.1 - describe, for each step in the scenario, some...Ch. 18.2 - Uranium-235, with a half-life of 713 million...Ch. 18.2 - Scientists have identified a free living bacterium...Ch. 18.2 - describe scenarios for the major evolutionary...Ch. 18.2 - State the order in which these events occurred,...Ch. 18.3 - describe fossil evidence of the earliest...Ch. 18.3 - describe the advantages that fostered the origin...Ch. 18.3 - Prob. 3CYL
Ch. 18.4 - Prob. 1TCCh. 18.4 - Does the mudskippers ability to walk on land...Ch. 18.4 - Can ancient DNA reveal the secrets of dinosaur...Ch. 18.4 - Although it may never be possible to recover DNA...Ch. 18.4 - describe the transitions and innovations...Ch. 18.4 - describe the advantages gained by the first plants...Ch. 18.5 - Scientists have cloned a number of animal species,...Ch. 18.5 - explain how extinction has affected the course of...Ch. 18.5 - describe the likely causes of mass extinctions in...Ch. 18.6 - We might be able to more easily distinguish...Ch. 18.6 - Paleontologists recently discovered fossil...Ch. 18.6 - describe the evolutionary history of humans and...Ch. 18.6 - name and describe some characteristics of the...Ch. 18.6 - describe the key features of the most recent phase...Ch. 18.6 - The unexpected discovery that humans interbred...Ch. 18 - Almost all of the oxygen gas in todays atmosphere...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - In the endosymbiotic origin of the mitochondrion,...Ch. 18 - Which of the following does not list evolutionary...Ch. 18 - Prob. 5MCCh. 18 - Because there was no oxygen in the earliest...Ch. 18 - The molecule _________ became a candidate for the...Ch. 18 - Complex cells that contain a nucleus and other...Ch. 18 - The Sperm of early land plants had to reach the...Ch. 18 - Prob. 5FIBCh. 18 - Prob. 6FIBCh. 18 - Prob. 7FIBCh. 18 - What is the evidence that life might have...Ch. 18 - How did the origin of photosynthesis affect...Ch. 18 - Explain the endosymbiont hypothesis for the origin...Ch. 18 - Name two advantages of multicellularity for plants...Ch. 18 - What advantages and disadvantages would...Ch. 18 - Prob. 6RQCh. 18 - Prob. 7RQCh. 18 - Extinctions have occurred throughout the history...Ch. 18 - In biological terms, what do you think was the...
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- Pine trees and moss show alternation of generations in their life cycle. During the life cycle of pine and moss the sporophyte stage is dominant the gametophyte is diploid meiosis occurs during spore formation seed formation occursarrow_forwardAngiosperm flowers are comparable to gymnosperm strobes, because both are composed of groups of __________ and __________.arrow_forwardThe stigma is the opening in a flower through which pollen moves to fertilize the eggs . Which characteristic would be most helpful to the stigma in capturing pollen ? ANSWER CHOICES ARE IN THE PHOTO. thanks.arrow_forward
- True or false: The image below represents the gametophyte generation of a fern.arrow_forwardYou take a walk in Forest Park (Portland, OR) and see a sword fern growing along the trail. You are looking at a seed plant a sporophyte a nonvascular plant a gametophytes a flowering plantarrow_forwardWhy would terrestrial existence be of an advantage to plants? What is the advantage for plants of having alternation of generations?arrow_forward
- The picture below shows a branch of Douglas fir, an evergreen tree of the Phylum Coniferophyta. Based on this picture, which of the following answers is true? o only staminate cones are visible only ovulate cones are visible both ovulate and staminate cones are visible o neither ovulate and staminate cones are visible MacBo-arrow_forwardIn which plant group(s) does the sperm need to swim to the egg in water, exposed to the environment? Select ALL that apply. Group of answer choices: 1. ferns 2. angiosperms 3. bryophytes 4. gymnospermsarrow_forwardFill in the blank with the term that best completes the sentence. 21. Switching between a haploid gametophyte stage and a diploid sporophyte stage is called 22. gives plant stems stiffness and helps protect plants against predators. 23. Nonvascular plants use for absorbing water. 24. Asexual reproduction from stems, leaves, or roots is called occurs when a growing plant embryo bursts through the seed coat. 25. 26. Liverworts, hornworts, and mosses are all plants. 27. Another name for vascular plants i , 28. stores food in seed plants. 29. In a flower the contains the stigma, style, and ovary. 30. The protects the seed.arrow_forward
- Description of a olive tree (using terminology from biology)arrow_forwardIn bryophytes, male gamete called ______________________needs ______________so it could get to the female gamete which is called the ____________________. The gametophytes generation is ____________________compared to sporophytes generation. This is about bryophytes, can you help? I want to check my answerarrow_forwarda gymnosperm ________ develops into an embryo within a seed.arrow_forward
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