The fossil record is biased because... Actually, this bias is only perceived; older eras had completely different body plans which makes it look like a lot of fossils are missing, while instead they existed. O Fossilization only happens under dry, arid conditions, which is most common in limited, desert like conditions. O The decomposition of an organism needs to slow down to increase chance of fossilization, which only happens under certain conditions. O Only organisms living in the deep ocean have a chance of fossilizing, because those are ideal conditions. 29 In TO

The fossil record is biased because... Actually, this bias is only perceived; older eras had completely different body plans which makes it look like a lot of fossils are missing, while instead they existed. O Fossilization only happens under dry, arid conditions, which is most common in limited, desert like conditions. O The decomposition of an organism needs to slow down to increase chance of fossilization, which only happens under certain conditions. O Only organisms living in the deep ocean have a chance of fossilizing, because those are ideal conditions. 29 In TO

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter23: Paleobiology And Macroevolution

Section: Chapter Questions

Problem 1TYK: The fossil record: a. provides direct and indirect evidence about life in the past. b. shoes that...

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One benefit of the fossil record isa. that hard parts of bodies are more likely to fossilize.b. that fossils can be dated.c. its completeness.d. that fossils congregate in one place.e. All of these are correct.
What is a transitional fossil? Transitional fossils were poorly adapted to their environments. O Transitional fossils have features that are intermediate between ancestors and descendants. Transitional fossils only existed for a short period of time. A transitional fossil is in the middle of a direct lineage stretching from ancient forms to organisms alive today
Scientists on a fossil expedition in the Florida Everglades excavated an area with four strata (layers). Z Hawthorn Group Y Tamiami Formation X Undifferentiated sediments W Miami Limestone The Everglades W X Z They found vertebrate fossils in all four strata: 124 fossils in the Miami Limestone, 75 fossils in the Undifferentiated sediments, 138 fossils in the Tamiami Formation, and 62 fossils in the Hawthorn Group. The scientists concluded that the Hawthorn Group contained the oldest fossils. Is this a valid conclusion? Yes. The Hawthorn Group must contain the oldest fossils because this layer has the smallest number of vertebrate fossils. CYes. The Hawthorn Group must contain the oldest fossils because it is the lowermost layer of soil and rock excavated by the scientists. No. The Tamiami Formation must contain the oldest fossils because it contains the greatest number of vertebrate fossils discovered. No. The Miami Limestone must contain the oldest fossils because it is the uppermost…
The fossil record (a) usually occurs in sedimentary rock (b) sometimes appears fragmentary (c) is relatively complete for tropical rainforest organisms but incomplete for aquatic organisms (d) a and b (e) a, b, and c
During the Precambrian, _______. a. atmospheric oxygen concentration declined b. bacteria, archaea, and early eukaryotes arose c. dinosaurs became extinct d. all of the above
Through _______, a body part of an ancestor is modified differently in different lines of descent. a. homologous evolution b. morphological convergence c. adaptive divergence d. morphological divergence
The fossil record: a. provides direct and indirect evidence about life in the past. b. shoes that all morphological novelties arise rapidly. c. provides abundant data about rare species with local distributions. d. is equally good for all organisms that ever lived. e. provides no evidence about the physiology or behavior of ancient organisms.
Which of the following is not a fossil? a. Dried-out animal bones in a layer of desert sand b. A patch or fur encased in amber c. A woolly mammoth frozen in Arctic permafrost d. Remains of an extinct whalelike animal e. The impression of a p1ant leaf in sandstone f. The wrinkly texture of shale imprinted with biofilms in sediments
Which statement is true about fossilization? (A) (B) (C) (D) Only animals with backbones (vertebrates) fossilize. Only animals with hard structures, such as bones or shells, fossilize. Animals always fossilize, but plante fossilize under certain conditions. All organisms fossilize, depending on the environmental conditions.
Why is the study of biogeography an important tool in explaining how species have evolved? * It shows us the relationship between a species' environment, and how they have evolved It shows us how the DNA has changed from one generation to the next It shows us how the bone structure of organisms has changed over time It shows us how old the Earth is Ce @ $ % 7 e t d gh #の

Imagine that you have the DNA sequences fromthe intron of a gene in three species called A, B,and C. Species A and B are most closely related,while C is more distantly related. The sequencesof A and B differ by 18 base pairs, A and C differby 26 base pairs, and B and C differ by 28 basepairs. Fossils show that species A and B divergedabout 1.2 Mya, but there is no fossil evidence asto when the most recent common ancestor ofall three species lived. Use the genetic data toestimate that date. What assumptions are youmaking to get this estimate?
Why is the study of biogeography an important tool in explaining how species have evolved? * It shows us the relationship between a species' environment, and how they have evolved It shows us how the DNA has changed from one generation to the next It shows us how the bone structure of organisms has changed over time It shows us how old the Earth is Sign out US Lenovo ce %23 24 4. 5 7 08 9. backspace %D tab e y a d f g. k C V. alt alt ctrl