Biology: Life on Earth Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780134153742
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 18, Problem 6FTB
Summary Introduction
To review:
The given blank space in the statement, “the first animals to live on land were _________ because their external skeletons, also called _______ supported the animals’ weight while protecting their bodies from ________.”
Introduction:
The first land animal evolved around 430 million years ago. These animals were the first invertebrates, which thrived on land. The main reasons for their success include a hard body covering, small size, improved motility, and the absence of competition from other species.
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Amphibians were the first _________, four-footed terrestrial vertebrates.
Basilosaurus was a fully aquatic ancient whale species that had vestigial _____________________ which suggests a terrestrial past.
knee caps
feet
hind limbs
hip girdle
Using examples, explain this statement: “Vertebrate skeletons are variations on a theme.
Chapter 18 Solutions
Biology: Life on Earth Plus Mastering Biology with Pearson eText -- Access Card Package (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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- Which features characteristic of humans are unlikely to fossilize? a. the bones and dung b. the jaws and dung c. behavioural and soft tissue features d. behavioural and hard tissue featuresarrow_forwardThe first group of animals to develop organs and organ system are Cnidarians Flatworms Sponges Segmented worms Bivalvesarrow_forwardwrite a paragraph that describe the key adaptation that were associated with the transition from aquatic life to terrestrial life in vertebrates.arrow_forward
- Fossil evidence that many saurapod dinosaurs had feathers suggests that ____. flight is an ancestral condition for sauropod dinosaurs sauropod dinosaurs were endothermic sauropod dinosaurs were ectothermicarrow_forwardOrrorin tugenesis was bipedal because it left footprints that showed it had an arch to its foot like modern humans. True or Falsearrow_forwardAgnathans (Jawless FIsh) Look at the image that is attached to this question to answer the questions I have How well developed is the skeleton. Is the notochord still evident? Is the skin smooth or rough? Can you see well-developed fins? What about the eyes?arrow_forward
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