If evolution is true then why do new species seem to appear out of nowhere in the fossil record? Here we see intermediate forms that show a progression over time VS. Wait where did those projections come from? And what's up with that pattern?
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I need help answering the big font question from my teacher presentation: If evolution is true then why do new species seem to appear out of now ehere in the fossil record?
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- Imagine that you have the DNA sequences fromthe intron of a gene in three species called A, B,and C. Species A and B are most closely related,while C is more distantly related. The sequencesof A and B differ by 18 base pairs, A and C differby 26 base pairs, and B and C differ by 28 basepairs. Fossils show that species A and B divergedabout 1.2 Mya, but there is no fossil evidence asto when the most recent common ancestor ofall three species lived. Use the genetic data toestimate that date. What assumptions are youmaking to get this estimate?What must be TRUE of any organ described as vestigial? It need be neither homologous nor analogous to some feature in an ancestor. O It must be analogous to some feature in an ancestor. O It must be homologous to some feature in an ancestor. OIt must be both homologous and analogous to some feature in an ancestor.How did all the different body types in the Cambrian arise so quickly? O Hox genes had evolved that determine and allow for the diversification of body plans. Because Hox genes hadn't evolved yet, there was a lot of flexibility in how body plans could develop. O There was a genome duplication event that led to the diversification of body plans. Enhancer driven gene expression had just evolved, which made it easier to vary body plans. Toing wheroptiones 29
- Snakes evolved from ancestors who had the ability to walk. Some snakes, in fact, still have small pelvis and leg bones that are rermnants from this ancestor. What are these called? * O Vestigial structure Homologous strucre O Sympatric structure Molecular homologyEvolution of Whales This is an example of how microevolutionary changes eventually result in the formation of a by macroevolution. 1. How many species are in the diagram? 2. What living animal are whales most closely related to? 3. What happened to whales' closest cousins? Outgroup Masonychia Perissodactyla Gujaratia pakistanensis Wasatchian Diacodexts Homacodon Tylopoda Sulformes Ruminantia Anthracotheres Cebochoerus Hippopotamids Khirtharia Indohyus Cetacea Distantly Related Mammal Extinct Ancestor Group Rhinos, Horses, Tapirs Pigs Cows/Sheep Hippos Extinct Artiodactyl Extinct Whale "Cousin" Modern WhalesA вс D E F G scales fur/ scales spikes horns horns claws feathers hair a) Which trait(s) did the most recent common ancestor of dragons A and B have? [ [ Select ] b) Which trait(s) appear to be the result of convergent evolution? [ Select ] c) Which trait(s) does dragon D have? [Select ] d) Which taxa is most closely related to dragon B? [ Select ] f) True or false? The clade formed by dragons D, E, and their most recent common ancestor is monophyletic [ Select ] e) Which trait(s) did the most recent common ancestor of dragon species A and E have? [ Select ]
- Why was the Cambrian era most unique among the fossil record of animal evolution? O Soft bodied animals fossilized only in this era. O Speciation of animals occurred only in this era. O All basic animal body types present today were found in this era. O Animal fossils are found only in this era.In the late 1800's, a biologist studying animal embryos coined the phrase, "ontogeny recapitulates phylogeny", meaning that the physical development of an animal embryo (ontogeny) seemed to retrace the changing form of the species during its evolutionary history (phylogeny). Why would embryonic development retrace evolutionary steps?Segmentation has evolved several times and occurs in most animal supergroups. What advantages do segmented taxa have over their unsegmented relatives?
- The fossil record is biased because... Actually, this bias is only perceived; older eras had completely different body plans which makes it look like a lot of fossils are missing, while instead they existed. O Fossilization only happens under dry, arid conditions, which is most common in limited, desert like conditions. O The decomposition of an organism needs to slow down to increase chance of fossilization, which only happens under certain conditions. O Only organisms living in the deep ocean have a chance of fossilizing, because those are ideal conditions. 29 In TOIs the fossil record a complete picture of all of the living things that have ever existed on earth? Why or why not?What are the most fundamental (oldest) characteristic(s) in the evolution of these animals (EMU, Liver fluke, Octopus, polar bear, raw pore rope sponge, and green frog).