A mutation that alters the expression pattern of a______ may lead to major differences in the adult form. a. derived character d. homologous structure b. master regulator e. lineage c. molecular clock f. all of the above
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A mutation that alters the expression pattern of a______ may lead to major differences in the adult form.
a. derived character d. homologous structure
b. master regulator e. lineage
c. molecular clock f. all of the above
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- An inguinal hernia results from ___ a. testes that move out of the body where they develop like they do in fish b. disks between vertebrae slipping when backbone alignment is off c. the downward pressure on arteries unique to bipedal primates d. failing valves in veins returning blood to the heart of bipedal primates e. a sex-linked recessive allele that was carried by female descendants of Queen VictoriaCertain species of blind fish living in perpetual darkness in the ocean depths have evolved from ancestors that could see. Research indicates that the brain centers for vision in these fish is degenerating, whereas the brain centers controlling other senses are enlarging. What might be the MOST probable reason for the loss of vision in these fish? O A. exposure to mutagens that caused the loss of vision B. progressive selection of genetic variants in the population leading to blindness as an evolutionary adaptation C. infection by cave-dwelling microorganisms that has led to degeneration of the eyes O D. extreme high pressure at the ocean depths causing a deterioration of visionMutations are __________. A. The sole source of variation in a sexually reproducing organisms B. The ultimate source of variation in sexually reproducing organisms C. Both genetic and chromosomal in nature D. All of these are correct
- 19. Lumber lordosis or the inward 's-shapes' curve of the human spine, can be described as a ___ trait: or a trait that the human species have, but is not present in older species such as the last common ancestor that the lineage of human species shared with the last common ancestor to chimpanzees. a. Obtained b. Derived c. Evolved d. PrimativeHox genes Group of answer choices a. are only found in nematodes and arthropods b. are pseudogenes that occur only in fungal DNA c. are one of the shared, derived characters that unify fungi and animals d. are single genes that act as master switches that activate other genes, which ultimately forms an entire segment of an animal's body e. are pseudogenes that occur only in animal DNAThe genes A B C occur in that order in fruit flies. A is 10 map units from B, and B is 20 map units from C. How far is A from C? A. 30 map units B. 20 map units C. 40 map units D. 10 map units E. 0.2 map units
- A developmental system underlying a trait may evolve so that it resists environmental influences on the phenotype. Such a system is refered to as _______. A. coalescence B. stabiliztion C. canalization D. subfunctionalization.Which of the following observations would support the Darwinian theory for the evolution of cancer cells (select all that apply)? A. Mutations enable tumor cells to grow faster than normal cells. B. Cells within the tumor each have different mutation in RAS C. Cells isolated from a tumor are all found to have an inactivating mutation in a gene that is normally pro-apoptotic D. Cells of the same type isolated from a tumor are all found to have multiple identical mutations E. Cells of the same type isolated from a tumor are found to be genetically distinct and have different types of mutationsWhether a fruit fly is a sitter or a rover depends upon its_____ . a. diet as a larva b. age c. genotype at one specific locus d. oxytocin level
- An evolutionary model of animal development explains how, O a.new genetic lines are produced less by modification than by unique mutation. O b.somites form as blocks of genes in cells randomly distributed throughout the body. OC.homeotic genes are found only in fruit flies, where they are responsible for odd placement of appendages. d. homeotic genes are not universal among animals. O e.animal body plans are constrained by existing structures in ancestral organisms.Illuminate Bat wing Bird wing Flying squirel wing a. Homologous c. Analogous b. Heterologous d. Vestigial 6. Which of the following is molecularlgenetic evidence for evolution? a. Embryonic human hemoglobin is different from adult human hemoglobin. b. Hemoglobin in humans can vary between different individuals. c. Human hemoglobin is more similar to chimp hemoglobin than mouse hemoglobin. d. Human hemoglobin is different from mouse hemoglobin. 个A mutation that alters the embryonic expression pattern of an _______ may lead to major differnces in the adult form. a. derived trait c. homologous structure b. homeotic gene d. analogous strcuture