Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 4TYK
Could both the food competition hypothesis and the sexual competition hypothesis explain why giraffes have long necks? Why or why not?
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Students have asked these similar questions
You want to distinguish between two hypotheses to explain the patterns you see:
1) Males not feeding the young is an adaptation to dimorphism
2) If males don't feed the young in a species, it will allow them to become brightly colored
To begin to address this question, map the characters changes in dimorphism and males feeding
the young onto each of the trees on the previous page.
CHARACTER
SEXUAL DIMORPHISM
MALES FEED YOUNG
Cassin's Vireo
No
No
Red Fox Sparrow
Cape May Warbler
Cedar Waxwing
Golden-Crowned Kinglet
Pyrrhuloxia
Yes
No
No
No
No
Yes
No
Yes
Yes
No
California Gull
No
Yes
Note: This data is fictional
5) Which of the hypotheses in part 4 is consistent with your analysis? Explain why in a brief paragraph.
Red queen hypotheses
(A) How is the evolution of the relationship between predator and prey like an
arms race? (B) Why is it that the prey usually leading in the evolutionary arms
race?
Chapter 1 Solutions
Biological Science (6th Edition)
Ch. 1 - Anton van Leeuwenhoek made an important...Ch. 1 - 2. PROCESS OF SCIENCE What does it mean to say...Ch. 1 - What does it mean to say that a characteristic is...Ch. 1 - 4. Could both the food competition hypothesis and...Ch. 1 - Prob. 5TYUCh. 1 - What did Linnaeus' system of naming organisms...Ch. 1 - 7. What is “selected” during natural selection?...Ch. 1 - 8. PROCESS OF SCIENCE Explain why researchers...Ch. 1 - CAUTION A friend tells you that the theory of...Ch. 1 - Prob. 10TYPSS
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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
- Female mimicry by males occurs in many species. For example, in the Broadley’s flat lizard (Platysaurus broadleyi), some males have the brown coloration of females while others are far more colorful (Whiting et al. 2009). Female mimics do secure some matings in the territories of their larger, more colorful rivals. Why are the bigger males (and those of the marine isopod Paracerceis sculpta) ever fooled into tolerating a female mimic? Why do female mimics occur in any species if the mating success of these individuals is lower than that of the bigger territorial males? Don't write from any online source..arrow_forwardEutheria PLACENTALS THERIANS MONOTREMES Metatheria MARSUPIALS E iv 89 64 81 54 Human Chimpanzee Gorilla Orangutan Macaque Marmoset Tarsier Galago Mouse Lemur Wallaby Dolphin Tree Shrew Squirrel Horse Dog Pig Alpaca Cat Cow Sloth Opposum Rabbit Fruit bat Echolocatin Hyrax Elephant Armadillo Platypusarrow_forwardSuggest a probable selective advantage of each of the following traits. a)clear wings of many flying insects b)long tongue of a chameleon c)tendrils of climbing plants d)eel's body shapearrow_forward
- In social insects, colonies often consist of a queen and workers. The workers are typicallydaughters of the queen. The queen is the only reproductive individual—the workers aresterile. a) According to Hamiton’s rule, what is the maximum ratio of cost to benefit (C/B) for theworkers in order for this system to evolve?b) Some colonies of ants have multiple queens, which can be related to different degrees.Imagine that two sisters start a colony, so that they are the mother or aunt to allworkers. What is the maximum ratio of cost to benefit (C/B) for the workers to sacrificefor their aunts?arrow_forward(A) Define Eusocial behavior. (B) What is it about the mating system of Eusocial hymenoptera that Hamilton used to explain the evolution of Eusocial behavior in this insect group? (C) Eusocial behavior has evolved in non-hymenoptera. The explanation depends on unique features of the ecology of these organisms. What might these be? (D) Use the Florida scrub jay, sponge shrimp or naked mole rat to explain your answer.arrow_forwardIn the context of the evolutionary relationship among ants, wasps, and bees, how come that these insects have shared common characteristics?arrow_forward
- Phalaropes are shore birds with brightly colored females and dull colored males. Females are larger than males and compete with each other for access to males. Considering sexual selection theory, select the idea(s) below that seem(s) most plausible in light of the pattern of sexual dimorphism? Pick all that apply This is a picture of a brightly colored female: O Females incubate eggs and care for the young. Males incubate eggs and care for the young Males are choosy. males are not choosyarrow_forwardWhat is the cost of sexual reproduction for males of Teleogryllus oceanicus on Kauai island?arrow_forwardHow does competition influence natural selection? Is the presence of competitors a selective force?arrow_forward
- What causes sexual dimorphism? Give some examples of sexually dimorphic species, and why you think that form of sexual dimorphism arose.arrow_forwardAn adult human has a flat face with a small jaw and large cranium. An adult chimpanzee has a large jaw and small cranium. Both juvenile chimps and humans have heads similar to adult humans. Which of the following is a reasonable explanation for this pattern? Group of answer choices A) genes that modify skull shape are not expressed in chimps during development B) head shape is controlled by cytoplasmic determinants C)genes that modify skull shape are not expressed in humans during development D) chimps and humans have completely different genes controlling the formation of the headarrow_forwardWhen great tits were experimentally reared in blue tit (Cyanistes caeruleus) nests, they survived quite well but failed to mate with their own species. The reproductive success of these individuals was consequently low (Slagsvold and Hansen 2001). Discuss both the negative and positive effects that imprinting of this sort could have had on the evolution of interspecific brood parasitism (when one species lays its eggs in the nest of another species) (Don't use any online source)arrow_forward
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