Fitness is a term often used by biologists to explain the evolutionary success o
ID: 82159 • Letter: F
Question
Fitness is a term often used by biologists to explain the evolutionary success of certain organisms. Which feature would a biologist consider to be most important in determining which species of fish were the most fit"? A) Large body size and to swim quickly away from predators B) Excellent ability to compete for food C) High number of offspring that survived to reproductive age D) High number of mattings with many different females. Evidence supporting the theory of evolution is found in studies of: A) DNA. B) Fossils. C) Biogeography D) Homologous structures. E) All of the above. According to the theory of evolution, chimps and apes had a common ancestor. However, chimps have 24 pairs of chromosomes and humans have 23 pairs of chromosomes. Using the theory of evolution, which statement BEST explains this difference in chromosome number? A) We should ignore the difference in chromosome number because you would not expect related species to have the same chromosome number. B) Chimps have 4 chromosomes to determine sex. Humans are more advanced organisms, and evolved a simpler system using only 2 chromosomes to determine sex. C) In humans, two chromosomes fused together giving us one less pair of chromosomes. Telomeres in the middle of Chromosome #2 provide supporting evidence. D) In chimps, one pair of chromosomes broke in half, creating two pairs of chromosomes. Missing telomeres at the end of Chromosome #2 and #3 provide supporting evidence. Which of the following is a required condition for natural selection? A) Variation in the population B) Time C) Environmental pressure D) The variations in the population must be heritable (controlled by genes). E) All of the above The different breeds of dogs seen today, ranging from German Shepherds to Shi Tzu. are a result of: A) natural selection. B) artificial selection. C) gene flow. D) genetic drift.Explanation / Answer
1. most fish should be able to get into reproductive stage so that they can multiply before they are prey by humans. So (C)
2) All these options add up to support Theory of Evolution. Therefore (E)
3. Chimps have a different number of chromosomes only because one of the human chromosomes is essentially the same as two chimpanzee chromosomes. So (C)
4.The relative competitive ability of a given genotype conferred by adaptive morphological, physiological or behavioral characters, expressed and usually quantified as the average number of surviving progeny of one genotype compared with the average number of surviving progeny of competing genotypes; a measure of the contribution of a given genotype to the subsequent generation relative to that of other genotypes within a population. So (A)
5. These dogs are intentionally mix breed by human to derive the desired trait. So (B)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.