Biology

Biology, 31.07.2019 11:10, narnia85

Develop when a fertilized egg divides into two parts that develop into separate embryos

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Biology, 25.06.2019 15:00, makennahudson94

According to embryology, why do fish and birds have a common ancestor? they both have embryos with gill slits and tails. they both have embryos with traits that eventually disappear. they both have embryos that develop into adults. they both have embryos that form from a fertilized egg.

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Biology, 01.07.2019 22:30, smartie80

Ascientist examines the embryos of a penguin, a duck, and a bat. she finds that the embryos of penguins and ducks develop in a similar way, whereas the embryos of a bat develop in a way that is different from penguins and ducks. which statement best explains this observation? a) penguin and duck embryos develop in a similar way since they both have similar ecological roles. b) penguin and duck embryos develop in a more similar way due to the greater number of chromosomes present in these species. c) bats experience more genetic mutations that do penguins and ducks and are likely to develop differently as a result of these random genetic changes. d) penguins and ducks develop in a more similar way since their common ancestor is more recent than the common ancestor of penguins and bats or ducks and bats.

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Biology, 02.08.2019 18:00, AshyCakes

Similar structures are present in the embryos of fish, salamanders, turtles, chickens and pigs. in fish, these structures develop into gills but in the other organisms they either disappear or develop into other body parts later in embryonic development. which of these statements below best explains the presence of these structures in the embryos of all five species? a) the embryos of the five species are similar in size. b) breathing structures are similar among the young of the five species. c) the five species have a common ancestor with these embryonic structures. d) the reproductive mechanisms are similar among the adults of the three species.

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Biology, 17.10.2019 01:10, riiahh22

Which of the following phenotypes would you expect to observe in steroidogenic factor 1 (sf-1) homozygous null mutant embryos? a. xy embryos would develop an ovary b. xy and xx embryos wouldnot form a bipotential gonad c. xy and xx embryos would not form the mesonephric kidney d. xx embryos would lack an ovary

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