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Are the similar structures among vertebrate species during embryogenesis homologous structures? Explain.
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- Briefly explain how and why the yolk distribution in mammalian eggs has changed from their telolecithal ancestors. #createFrom a 24-hour chick embryo, provide the answers in the following: Pairs of somites in a 24-hour chick embryo Germ layer/s that forms the head process What begins the formation head of process Germ layer/s that form the proamnion Explain why the notochord is not visible in areas where the somites are seenThe figure below shows a time-dependent decrease in size (F to H) of a Hyloxalus frog's yolk plug (labeled with "yp") due to morphogenic movements of vegetal cells towards the internal of the embryo. What major stage of embryonic development is shown in the figure above? Choose the best answer. E 10 F st 12 H st 12.5 O Gastrulation O Fertilization O Blastulation O Cleavage Formation
- Explain: Is the degenerating blastocoel visible in the frog gastrula? How much yolk protrudes through the blastopore of a frog gastrula How much yolk protrudes through the blastopore of a frog gastrula? Chickens lack a larval stage. How do they compensate for this?In the frog embryo, convergent extension elongates the notochord. Explain how the words convergent and extension apply to this process.https://nj.pbslearningmedia.org/resource/tdc02.sci.life.stru.different/cell-differentiation/#.XhYcbf5KjBI How would you explain the similarities among bird, mammal, and reptile embryos at the early stages of development, and what directs the sequence of events during embryonic development?
- Describe the radiation in vertebrate forms from phylotypic stage by focusing on three groups of vertebrates and then tracing the development of several homologous features in each group. Connect specific embryological structures in the phylotypic stage to divergent morphological structures in the adults of each of these groups. (Answer all questions, if possible)Darwin’s finches (Thraupidae, Passeriformes) have beaks of different shapes that allow them to feed on many different diets: insects, seeds, berries, and young leaves. For example, large ground finch has a very deep and broad bill adapted to crack hard and large seeds, while the cactus finch has an elongated and pointy beak for probing cactus flowers and fruits. Geospiza finch bills develop their distinct shapes during embryogenesis and are apparent upon hatching. Figure below is species-tree estimation of phylogenetic relationships among the Galápagos finches using mtDNA and nuclear loci information. ***Branch lengths are proportional to time and genetic distance except for abbreviated basal node depth.*** Photographs of profiles of each species are shown. Identify all species pair(s) who have the most similar DNA sequence and clearly explain why. Would Ce. fusca and Ce. olivacea be considered as one of the pair with the most similar DNA sequence given that "branch lengths are…Darwin’s finches (Thraupidae, Passeriformes) have beaks of different shapes that allow them to feed on many different diets: insects, seeds, berries, and young leaves. For example, large ground finch has a very deep and broad bill adapted to crack hard and large seeds, while the cactus finch has an elongated and pointy beak for probing cactus flowers and fruits. Geospiza finch bills develop their distinct shapes during embryogenesis and are apparent upon hatching. Figure below is species-tree estimation of phylogenetic relationships among the Galápagos finches using mtDNA and nuclear loci information. ***Branch lengths are proportional to time and genetic distance except for abbreviated basal node depth.*** Photographs of profiles of each species are shown. Identify all species pair(s) who have the most similar DNA sequence and clearly explain why. Would Ce. fusca and Ce. olivacea be considered as one of the pair with the most similar DNA sequence given that "branch lengths are…