BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 21, Problem 7U
The possession of fine fur in 5-month human embryos indicates
a. that the womb is cold at that point in pregnancy.
b. humans evolved from a hairy ancestor.
c. hair is a defining feature of mammals.
d. some parts of the embryo grow faster than others.
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Scientists compare the structures of a chicken embryo and a human embryo at the same stage of development. They find that both vertebrates have similar shapes and structures, including the presence of gill slits and tails. How is this comparison of the embryos used as supporting evidence of evolution?
A. The similarities suggest that chickens and humans are the direct descendants of modern day fish with tails and gill slits.
B. The similarities suggest that vertebrates passthrough each of the adult stages of their evoluntionary history as they develop.
C. The similarities suggest that vertebrates can undergo genetic changes during development that lead to the evolution of new species
D. The similarities suggest that chickens and humans descend from ancestors with genes that code for the development of tails and gill slits
According to the film, "Your inner reptile," which of the following did we inherit from our reptilian ancestors?
A) A yolk sac which is present in our embryonic stage
B) our skin
C) remnants of yolk-producing in our genome
D) All of the above
The bones in the front fins of whales and the bones in the human arm evolved from a common ancestor but carry out different functions. This is an example of
A. homologous structures.
B. vestigial structures.
C. analogous structures.
D. embryonic structures.
Chapter 21 Solutions
BIOLOGY
Ch. 21.1 - Prob. 1LOCh. 21.1 - Prob. 2LOCh. 21.2 - Prob. 1LOCh. 21.2 - Distinguish between demonstrating that evolution...Ch. 21.3 - Contrast the processes of artificial and natural...Ch. 21.3 - Prob. 2LOCh. 21.4 - Prob. 1LOCh. 21.4 - Prob. 2LOCh. 21.4 - Prob. 3LOCh. 21.5 - Explain the evolutionary significance of...
Ch. 21.5 - Prob. 2LOCh. 21.6 - Prob. 1LOCh. 21.6 - Prob. 2LOCh. 21.7 - Characterize the criticisms of evolutionary theory...Ch. 21.7 - Prob. 2LOCh. 21 - Suppose that a male with a beak depth of 10 mm...Ch. 21 - Prob. 1IQCh. 21 - Prob. 2IQCh. 21 - Prob. 3IQCh. 21 - Why might the evolutionary line leading to...Ch. 21 - Artificial selection is different from natural...Ch. 21 - Gaps in the fossil record a. demonstrate our...Ch. 21 - The evolution of modern horses (Equus) is best...Ch. 21 - Homologous structures a. are structures in two or...Ch. 21 - Convergent evolution a. is an example of...Ch. 21 - Prob. 6UCh. 21 - The possession of fine fur in 5-month human...Ch. 21 - In Darwins finches, a. occurrence of wet and dry...Ch. 21 - Prob. 2ACh. 21 - Convergent evolution is often seen among species...Ch. 21 - What conditions are necessary for evolution by...Ch. 21 - Explain how data shown in figure 21.2a and b...Ch. 21 - Prob. 3SCh. 21 - Refer to figure 21.5, artificial selection in the...Ch. 21 - The ancestor of horses was a small, many-toed...
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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
- How can evolutionary relationships among organisms be determined by comparing embryonic development? A. Embryos of fish and mammals share no similarities B. Embryos retrace their ancestral stages during embryonic development C. Embryos of more closely related organisms show greater similarities in development D. Embryos that develop inside eggs lack similarities to placental mammalsarrow_forwardWhich of the following is NOT a trait commonly found in primates? A. Nails on the fingers and toes B. Color vision that includes reds and yellows C. Having a prehensile tail D. Skeletal anatomy that protects the eyesarrow_forwardDespite the differences in neck length, mice, humans, and giraffes all have seven cervical vertebrae. This is an illustration of A. missing links. B. homologous structures. C. vestigial structures. D. analogous structures.arrow_forward
- Which gene family was found to control the development and differentiation of limbs in vertebrate lineages? A) Hox B) Sonic hedgehog C) Noggin D) Eyelessarrow_forwardWhich statement is true of hox genes? Group of answer choices A. they regulate development of body regions and are found in all animals B. they control the functioning of cells and are found in all life C. they control growth and development in plants D. they are only found in insects and control segmentationarrow_forwardWhich of the following is NOT an ancestral trait in primates? A. Trichromacy B. Having Nocturnal Adaptations C. Fur D. Clawsarrow_forward
- Which of the following derived traits is unique to New World Monkeys, who live in the trees? Group of answer choices A: a grooming claw. B: a prehensile tail C: female genital swelling D: a sacculated stomacharrow_forwardA. According to Gould and Vrba (1982), when the original cooling function of insect appendages was changed to flying, this is an example of a. inheritance. b. exaptation. c. apatation. d. adaptation. B. When primates first evolved away from their mammalian ancestors, they a. developed a larger and more complex brain. b. increased their reliance on the sense of smell. c. increased the number of canines (for meat-eating). d. all of the abovearrow_forwardWhy are plesiadapiforms most likely the earliest primate ancestors? A. They do not have a postorbital bar or plate B. Their eyes are forward-facing C. They have grasping fingers D. They have clawsarrow_forward
- Observation of the development of embryos in sea stars shows the mesoderm forming pouches bulging from the archenteron to form the coelom. From this observation, you can predict that A. the cleavage of the embryo is radial. B. the adult animal will have bilateral symmetry. C. the mouth forms from the first opening in the gastrula. D. the animal is diploblastic.arrow_forwardWhich of the following is one of the main tendencies observed in early hominins, such as australopithecines? A. Decrease in the number of incisors B. Reduced canine size C. Increased facial prognathism D. Increased diastemaarrow_forwardPlease answer ASAP Human beings are chordates, yet we lack most of the main derived characters of this animal cohort. Why? a.In humans, these characteristics are present only during infancy. b.In humans, these characteristics are present only in the embryo. c.In humans, these characteristics are lost prior to embryonic development. d.In humans, these characteristics are present only in the zygote.arrow_forward
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