Which of the following is not necessary to cause evolution by natural selection? Phenotypic variation among individuals Heritability of variable traits Adaptations Differences in survival and reproduction among individuals All are necessary
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Urgent please
Which of the following is not necessary to cause evolution by natural selection?
Heritability of variable traits
Adaptations
Differences in survival and reproduction among individuals
All are necessary
Step by step
Solved in 2 steps
- Which of the following is likely to be most important in the evolution of two species from one population of another species? O some kind of barrier that physically divides the original species into two sub-populations a change in the environment such that one sub-population experiences differential natural selection O reduced performance of gametes (e.g., pollen) in crosses between sub-populations O reduced fitness of offspring resulting from crosses between sub-populations genetic divergence and cessation of gene flow between sub-populationsWhich of these fundamental concepts is well illustrated by genetic exchange among, but distinct lineages of, modern humans, Neanderthals, and Denisovans? Traits evolve to continuously improve over time Evolutionary relationships can only be identified using shared, derived characteristics Natural selection requires variation in heritable traits Genetic drift is strongest in very small populations Speciation is a long-term evolutionary process not an eventWhich of the following forces of evolution is considered purely random? natural selection non-random mating genetic drift O mutation O migration
- Which of the following statements regarding evolution is FALSE? evolution is a relatively slow process Oall of these statements are TRUE evolution operates at a variable speed transitional forms appear during periods of rapid evolutionary change evolution operates over the course of multiple generationsn 12 12 of 25 Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories, including direct observation of evolutionary change, the fossil record, homology, and biogeography. Sort the following examples into the correct categories. Drag each phrase to the appropriate bin. > View Available Hint(s) Reset Help same genetic code in fireflies and tobacco plants similarities in mammalian forelimbs development of drug resistance in bacteria discovery of transitional forms of horses similarity of endemic island species to nearby mainland species vestigial pelvis in right whales discovery of shells of extinct species the high concentration of marsupial species in Australia biogeography direct observation of evolutionary change fossil record homology P Pearson 12:06 PM EX home um ik T Y U home enter 4. B shift end alt ctrl 144For Chapters 4-6: CHAPTER IV. Natural Selection; or the Survival of the Fittest. Natural Selection—its power compared with man's selection—its power on characters of trifling importance—its power at all ages and on both sexes—Sexual Selection—On the generality of intercrosses between individuals of the same species—Circumstances favourable and unfavourable to the results of Natural Selection, namely, intercrossing, isolation, number of individuals—Slow action—Extinction caused by Natural Selection—Divergence of character, related to the diversity of inhabitants of any small area, and to naturalisation—Action of Natural Selection, through Divergence of Character and Extinction, on the descendants from a common parent—Explains the grouping of all organic beings—Advance in organisation—Low forms preserved—Convergence of character—Indefinite multiplication of species CHAPTER V. Laws of Variation. Effects of changed conditions—Use and disuse, combined with natural…
- Background: In class we did a project about m and m’s and there ability to evolve and natural selection. (Yes I know they can’t actually evolve it was just used as a example in class) however I can’t figure out this question. Occasionally a mutant may occur and produce a candy that is misshapen or Pointier or flatter than the rest. Often this proves to be a weakness, but a rare mutation may confer extra M&M durability. Other mutations in M&Ms could occur ( like ones that result in a new color). A mutant un you population represents a new _________. What goes in the blankWhat is the role of variation in evolution. If heterozygosity is reduced, what happens to the potential for evolution?. The phenotype and genotype bof a population is die to a mosaic of random and directed processes, some of them have to do with history ;some are related to adaptation, etc. As completely as possible, discuss the role of chance and direction in evolution and in determining the phenotype of a populationTHE STICKLEBACK FISH: An excellent model for understanding evolution in the wild at many levels Lateral plates develop front to back MOLECULAR GENETIC LEVEL Oceanic MORPHOLOGICAL & DEVELOPMENTAL LEVEL POPULATION LEVEL Selection on the forms of the plate gene varies throughout a stickleback life in fresh waters. Freshwater Freshwater fish don't develop as many plates Younger fish without the low form of the gene survive better June November Three regions of a stickleback chromosome have been linked to the loss of lateral plates and one lateral plate gene has been identified. Older fish with the low form of the gene survive better ENSE
- Ecalogical seleation Sexual selection What is ecological selection? How is it different from sexual selention torsurviva - Selection by the opposite sex - pormpetitive ad vantage Competition within males females predator avoidanoe selection? What kinds of traits result from ecological selection? Erirae Constraints on adaptive pertecton (optmali Why doesn't natural selection produce optimally adapted organisms? Oren ldaa NOT cop Adigsdon re om civep eb he numet n ognawihrntruclure and e . r e e Tw u n Ecological selection oeed .ha o hore cs Scanned vwith CamScannerRemember that understanding is explanations more than facts. Definitions of phenotype, genotype, allele, gene, microevolution, macroevolution Know that in humans, most of the genetic variation is observed within populations, and know why that is. Know the 4 processes of evolution (3 neutral + natural selection) Know that evolution isn't progressive and doesn't necessarily lead to more complexity Know that evolution can lead to traits that decrease survival (ex: sexual selection) Know that quantitative traits are generally influenced by (i) many genes, each having a small effect on the trait value; and (ii) the environment What is F1 like when you cross 2 homozygotic lines of peas of different colors? What is F2 like when you cross F1 individuals (remember what 9:3:3:1 is about) Know what genetic dominance is about Definitions of chromosome, nucleus, mitosis, meiosis, crossing over How many chromosomes in humans? How many pairs of chromosomes? Know and apply Hardy-Weinberg's equation…Natural Selection is defined as the differential survival and reproduction of individuals due to differences in phenotype. What two features of a population are required for Natural Selection to function? Binary fission Asexual reproduction Genetic variation Overproduction of progeny Homeostasis Interbreeding of progeny Recombination O Co-dominant phenotypes