CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Chapter 40.6, Problem 2CC
WHAT IF? Mice that experience stress such as a food shortage will sometimes abandon their young. Explain how this behavior might have evolved in the context of reproductive trade-offs and life history.
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Students have asked these similar questions
Iti do a cohort study on some new cute animal, and I discover that most of the individuals die at a relatively young age, and only a few live close to the maximum age for the species, what
would you predict about the reproductive strategy of this species?
O They probably produce relatively few offspring and invest a lot of parental care into each offspring.
O They probably produce a lot of offspring, and invest a lot of parental care into each one.
O They probably produce a lot of offspring but do not invest much parental care in any individual offspring
O They probably produce offspring only after individuals manage to live to close to their maximum age
Need help
Multiple choice
Fewer than 3% of animals engage in direct care of their offspring. When might the benefits of parental care outweigh the costs?
Choose the correct option and Explain why you choose that answer.
a) All of the options.
b) Species that feed on resources with high foraging effort (e.g., smaller insect prey versus larger insect prey).
c) Species with highly immature young, for instance those with large brains that have long learning periods.
d) Species with limited breeding opportunities.
In the eclectus parrot (Eclectus roratus), mothers sometimes take parental favoritism to extreme lengths by killing their sons, but never their daughters (Heinsohn et al. 2011). Sex-specific infanticide occurs more often at nests that can be flooded during the rainy season. Sons spend longer in the nest than daughters. Link this factor to why it might be adaptive for a parent parrot to kill a son in a vulnerable nest occupied by offspring of both sexes.
Don't write from any online source..
Chapter 40 Solutions
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
Ch. 40.1 - Explain how the suns unequal heating of Earths...Ch. 40.1 - Prob. 2CCCh. 40.1 - WHAT IF? If global warming increases average...Ch. 40.2 - Why are phytoplankton and not benthic algae or...Ch. 40.2 - Prob. 2CCCh. 40.2 - MAKE CONNECTIONS The addition of nutrients to a...Ch. 40.3 - Give examples of human actions that could expand a...Ch. 40.3 - WHAT IF? You suspect that deer are restricting the...Ch. 40.4 - DRAW IT Each female of a particular fish species...Ch. 40.4 - Imagine that you are constructing a life table for...
Ch. 40.4 - Prob. 3CCCh. 40.5 - Explain why a constant per capita rate of growth...Ch. 40.5 - Explain why a population that fits the logistic...Ch. 40.5 - Prob. 3CCCh. 40.6 - Prob. 1CCCh. 40.6 - WHAT IF? Mice that experience stress such as a...Ch. 40.6 - Prob. 3CCCh. 40 - Which of the following biomes is correctly paired...Ch. 40 - A populations carrying capacity A. may change as...Ch. 40 - When climbing a mountain, we can observe...Ch. 40 - According to the logistic growth equation...Ch. 40 - WHAT IF? If the direction of Earths rotation...Ch. 40 - INTERPRET THE DATA After examining Figure 40.13,...Ch. 40 - SCIENTIFIC INQUIRY Jens Clausen and colleagues, at...Ch. 40 - Prob. 8TYUCh. 40 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 40 - Prob. 10TYU
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- INTERPRET DATA Look at the two graphs in Figure 52-21. In which experiment did the parentals in the experimental group guard the eggs more closely? In which experiment did the experimental parentals guard the young more closely? Account for these differences. RESULTS: Experiment 1: As indicated on the y-axis, which measures level of parental care, parentals reduced their level of guarding the eggs. Eight of the males in the experimental group abandoned their nests, and egg defense was significantly lower in this group compared with that in the control group. However, after eggs hatched, there was little difference in parental care of the young between the two groups. Experiment 2: During the egg phase, there was little difference in level of parental care between experimental and control groups. However, after eggs hatched, the experimental parentals significantly decreased their level of guarding the nest. CONCLUSION: Male bluegill sunfish adjust their level of parental care according to their level of perceived paternity. In Experiment 1, parentals provided less care when they perceived that the eggs may have been fertilized by sneaker males. After the eggs hatched, olfactory cues indicated that the offspring were indeed their own, and their level of care increased. In Experiment 2, parentals cared for the eggs even though some had been swapped. However, after they hatched, olfactory cues from the offspring indicated that they were not the parentals own offspring. The level of parental care decreased significantly. SOURCE: B.D. Neff, Nature, Vol. 422 (April 17, 2003): 716719. Figure 52-21 Decisions about parental carearrow_forwardWHAT IF? Suppose you applied Hamilton’s logic to asituation in which one individual is past reproductiveage. Could there still be selection for an altruistic act?arrow_forwardQ2.16. When heavily armored marine sticklebacks have invaded freshwater lakes where there are no predatory fish, their populations have evolved lighter body armor. Given what you've learned about evolution, which of the following explanations for why this happens is most plausible? O Young sticklebacks only grow heavy armor when they see predatory fish in their environment. O When sticklebacks don't use their armor, it shrinks. Then they pass lighter armor to their offspring. Concentrated pollutants in freshwater lakes disrupt the sticklebacks' ability to grow armor. O Heavily armored fish grow more slowly and breed later, making armor disadvantageous in these lakes.arrow_forward
- Conservation biologists have altered the evolution of salmon populations in captive-breeding programs. Wild female salmon tend to produce fewer large eggs because the large eggs contain more nutrients for the off spring, giving each individual a greater chance to survive. After just a few generations, however, captive-bred females now lay greater numbers of small eggs. Suggest a possible adaptive advantage for many small eggs in the captive-bred environment. What would you predict regarding the reproductive success of captive-bred females released in the wild?arrow_forwardWhy are there sexual conflicts of interest among primates between the sexes? Detail the "anisogamy problem." Are there overlapping interests between males and females? References are the books "Primate Behavioral Ecology" by Karen Strier and "Planet Without Apes" by Craig Stanfordarrow_forwardQ1: Chihuahua and Great Dane dogs are of the same species but do not usually mate, why? A. Because chihuahua are usually located in Asia and Great Danes are from EuropeB. Because their reproductive organs are not compatibleC. Because their sperm and their egg will not recognize each otherD. Because chihuahua/great dane do not recognize the courtship of each other Q2: During his time, even if his contributions to the field of taxonomy is significant, he did not believe that resemblances are due to evolution, but of the Divine creation. A. Jean-Baptiste LamarckB, Gregor MendelC. Carolus LinnaeusD. Charles Darwin Q3: This theory suggests that eukaryotic cells emerged from prokaryotic cells. A. EndosymbiosisB. Theory of Use and DisuseC. PhagocytosisD. Speciation Theoryarrow_forward
- Answer Plz.arrow_forwardThink critically A student want to study the Moulting in mosquitoes. He very much clear about the mechanism of Moulting but unfortunately he forgot to choose the right hormone. He has two types of hormone, juvenile hormone and moult inhibiting hormone. He tries with both the hormone in mosquitoes and observed the results. What will be the results to the mosquitoes development with the juvenile hormone and the moult inhibiting hormone. It's not an assignment or complex question. It's an entamology question. Kindly answer and Don't reject it under complex or essay type. It's not comes under those category. Thank youarrow_forwardFemale 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_forward
- Describe the advantage of using an aural or pheromone signal to attract a mate as opposed to a visual signal. How might the population density contribute to the evolution of aural or visual mating rituals?arrow_forwardNuptial gift in crickets: duormous are male Understand the examples of species with sex-role reversal. Sex role reversal In some empid fies, the operational sex ratio is heavily female biased, because most males are off hunting for insect prey that is used as a nuptial gift When a male enters the swarm with a nuptial gift. he may find females advertising themselves with unusually large patterned wings, legs or abdomen. Is this always the case? m le diaclans Sex role reversal Sex role reversal Pipefish males have a brood pouch in which females lay their eggs. Provide nutnients and oxygen for a clutch of eggs for several weeks (male "pregnancy") Females compete formales. Males how more interest in feeding thanin mating. transfers to the female an spermatophore (-24% of the male's body mass). Males can only afford to mate orice. qpa cs Scanned with CamScannerarrow_forwardIs this correct??? or is it the other way aroundarrow_forward
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