Q4.25. In the r- vs. K-selection classification, which of the following best describes an r-selected species? Individuals grow larger, live longer, reproduce later, and invest more resources into each offspring. O Individuals reproduce early and often, maximizing fecundity with little investment in each offspring. O Individuals live longer and reproduce later but invest very little in offspring. Individuals reproduce early and often and invest more resources into each offspring.

Q4.25. In the r- vs. K-selection classification, which of the following best describes an r-selected species? Individuals grow larger, live longer, reproduce later, and invest more resources into each offspring. O Individuals reproduce early and often, maximizing fecundity with little investment in each offspring. O Individuals live longer and reproduce later but invest very little in offspring. Individuals reproduce early and often and invest more resources into each offspring.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter45: Population And Community Ecology

Section: Chapter Questions

Problem 17RQ: Which of the following statements does not support the conclusion that giraffes are k-selected...

See similar textbooks

Similar questions

Q6.4. What is the effective size of a population? The size of a population with the same heterozygosity as the actual population, but which does not lose heterozygosity over time The size of an idealized, randomly mating population losing homozygosity at the same rate as the actual population The size of an idealized, randomly mating population losing heterozygosity at the same rate as the actual population The size of a randomly mating population with the same sex ratio as the actual population
Q2.16. 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.
Explain how sexual selection might lead to a)sexual dimorphism and b) members of one sex (usually male) having traits that do not enhance their survival
Q7. Someone has handed you the following graph of changes in the frequency of one allele in a population over time. Based on the graph and without any other information, which of the following is most likely true? 1.0 + 0.75 + Allele Frequency 0.50 0.25 + 0.0 0,00 10 20 30 Time (generation) O The allele does not offer any selective advantage and the population is small. O The allele does not offer any selective advantage and the population is large. O The allele offers a selective advantage and the population is large. The allele was introduced at a very low frequency and the population is large.
Q4.7. A large sunflower population is established in a field. The flowers mate randomly, and all individuals are equally likely to survive and reproduce. In this population, 60% of the alleles of a gene for petal color are dominant and 40% of the alleles are recessive. Given this information, after many generations, which of the following options would be most likely? The allele frequencies will be 100% dominant and 0% recessive. The allele frequencies will be 80% dominant and 20% recessive. The allele frequencies will be 60% dominant and 40% recessive. There is no way to predict what the allele frequencies will be.
Q6.6. If gametes from a gene pool combine randomly to make only a small number of zygotes, the allele frequencies among the zygotes may be quite different than they are in the gene pool. Why? The effects of natural selection are more pronounced in small populations. Changes in allele frequencies over many generations are inevitable with sexual reproduction. Alleles combine more randomly with a small number of zygotes. The effects of sampling error are more pronounced with smaller samples.
What is the relationship between reproductive value and strength of selection? when reproductive value is high, selection is weak when reproductive value is high, selection is strong there is no relationship; it is constant
6)Which one of these statements about fitness is most accurate? a)Fitness is a measure of strength & health b)Fitness can only be measured at the population level c)Fitness may change at a population level, but is constant for an individual d)Fitness is an overall measurement that applies to all evolutionary mechanisms e)Fitness is a measure of reproductive success
Which of the following is not true for a critically endangered species? Expression of deleterious alleles and increased homozygosity increases mortality of young, and inbreeding depression leads to reduced offspring fitness The individuals of the species which have declined to low numbers are still a genetically open system Loss of some allele from the species causing loss of genetic diversity with consequent inability to respond rapidly to selection Reduction of population breeding ability due to increased relatedness through the action of incompatibility mechanisms in plants or behavioural difficulties in animals
rolution on.com/player Stages of natural selection What is the order of stages in natural selection? Genetic variation exists between individuals of a population. Individuals compete with each other for food, water and mates, and to avoid predators. Individuals with adaptive phenotypes compete better and are more likely to survive and reproduce, at the expense of... ..individuals with less adaptive phenotypes and fewer competitive characteristics, which die or reproduce less. Genes for adaptive char acteristics are more likely to be inherited. The number of individuals with the adaptive phenotype increases. oboardworks 18 of 29 Chp
Which of the following scenarios is an example of directional selection? A population of Sharks is evolving towards the average body size; small sharks fall prey to killer whales, large sharks can't get enough food A population of daisies is evolving away from pink individuals and towards white and red individuals. Pink flowers blend in whereas white or red can more easily be spotted by bees A population of snakes is evolving to become browner since lighter colored snakes are more easily spotted by predators
Think about how we organized the mechanisms of sexual selection (mate competition vs. mate choice; resource-based choice vs. non-resource-based choice, etc.). Based on this organization, choose the pair of examples from the list below that are most closely matched in terms of mechanisms of sexual selection. Male red deer engage in physical contests to determine who mates with a female. Male mouse lemurs engage in scramble competition for female mates. Peahen (female) chooses to mate with a peacock that has large eyespots in the tail feathers of his magnificent display. Question 8 Think about how we organized the mechanisms of sexual selection (mate competition vs. mate choice; resource-based choice vs. non-resource-based choice, etc.). Based on this organization, choose the pair of examples from the list below that are most closely matched in terms of mechanisms of sexual selection. Male roadrunner presents female with lizard 'snack' during courtship. Male butterfly transfers sodium to…