Biology: Life on Earth (11th Edition)
11th Edition
ISBN: 9780134168296
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 18, Problem 4FTB
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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Use the picture to fill in the blanks in the following sentence.
This picture of a fern exhibits the _[X]__ generation which is the dominant generation. If you were to turn over
the fronds you would see the reproductive structures known as
[Y]
Seedless vascular plants must reproduce when conditions are wet because their sperm must_______________ . Two adaptations that allow seed plants to reproduce more efficiently on dry land are_________ and_________ . The seed plants fall into two major categories: the nonflowering_______________ and the flowering_________ . Flowers were favored by natural selection because they__________ . Fruits were favored by natural selection because they_____________ .
In 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 answer
Chapter 18 Solutions
Biology: Life on Earth (11th Edition)
Ch. 18 - 1. Almost all of the oxygen gas in today’s...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - 3. In the endosymbiotic origin of the...Ch. 18 - 4. Which of the following does not list...Ch. 18 - Prob. 5MCCh. 18 - 1. Because there was no oxygen in the earliest...Ch. 18 - 2. The molecule ________ became a candidate for...Ch. 18 - 3. Complex cells that contain a nucleus and other...Ch. 18 - 4. The sperm of early land plants had to reach the...Ch. 18 - 5. Early plants that protected their seeds within...
Ch. 18 - Prob. 6FTBCh. 18 - Amphibians gave rise to ____________, which had...Ch. 18 - 1. What is the evidence that life might have...Ch. 18 - Prob. 2RQCh. 18 - 3. Explain the endosymbiont hypothesis for the...Ch. 18 - 4. Name two advantages of multicellularity for...Ch. 18 - What advantages and disadvantages would...Ch. 18 - 6. Outline the major adaptations that emerged...Ch. 18 - Outline the evolution of humans from early...Ch. 18 - Extinctions have occurred throughout the history...Ch. 18 - In biological terms, what do you think was the...
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- Flowers are adaptations for _______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
- Which statement about bryophytes is not correct? A. They lack xylem and phloem B. The dominant phase of their life cycle is diploid C. They are the first land plants D. Sperm can be aided in their travel to the egg by insects E. They have cells with 9+2 flagellaarrow_forwardIt is said that an oak is an acorn’s way of making moreacorns. Write an explanation that includes these terms:sporophyte, gametophyte, ovule, seed, ovary, and fruit.arrow_forwardUse the picture to fill in the blanks with the most correct answers. This is a picture of the reproductive structures of a bryophyte,_[V]_ . The arrow A is pointing at the female ga metophyte or_[X]_ which produces__[Y]_ and the arrow B is pointing at the male gametophyte bears [W]_ which produces _[Z]_. Аarrow_forward
- Trimerophytes were plants that probably evolved from rhyniophytes but with more derived features. In one feature, certain stems grow longer than others, and thus, rather than having dichotomous branching, they have branching (displayed especially by Pertica). Simultaneously, the positioning of branches became more and .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_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_forward
- The land plants are probably descendants of which of these groups? a. green algae b. red algae c. brown algae d. angiospermsarrow_forwardAll members of the Plant Kingdom have a close ancestor "the Charophytes" and from aquatic habitat. Why would a terrestrial existence be an advantage for a plant? Why didn't they just stay in the water? How terrestrial plants encountered the challenges of colonizing on land successfully?arrow_forwardThe kingdom Plantae constitutes large and varied groups of organisms. There are more than 300,000 species of identified and cataloged plants. Using the geologic record, discuss and explain when and how plants colonized the land. Include the adaptations that enabled them to survive on land amid the harsh environmental conditions.arrow_forward
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