The number and location of bones within fossilized vertebrate skeletons are similar to those in living vertebrates. Most biologists explain this fact by saying that extinct and modern vertebrates had similar needs had different genes both struggled for existence both share a common ancestor

Eels have slender bodies that facilitate moving through narrow cracks in rocks when searching for prey. In 2-3 sentences: Provide a scenario describing how and why slender bodies of eels may have evolved, according to the principles of natural selection.

Along comes Dr Phil Bell and deep in the mines of Lightning Ridge, finds an amazingly preserved pterosaur that preserves feathers. He hypothesises that this means that feathers must have evolved before the origin of dinosaurs and therefore must have been primitive. Test this hypothesis using phylogenetic framework and provide a brief explanation of your process and whether or not you support Dr Bell's hypothesis.

Which of the following is the correct sequence of traditional fossils that provided evidence for the evolution of amphibians from the fish in order from oldest (most mya) to most recent (fewest mya) in the fossil record? -Eusthenopteron, Tiktaalik, Ichthyostega -Eusthenopteron, Acanthostega, Tikaalik -Ichthyostega,  Eusthenopteron, Panderichthys -Tiktaalik, Panderichthys, Ichthyostega - Ichthyostega, Oanderrichthys, Eusthenopteron

Refer to the image. Gibbon (20 species in 4 genera) Prosimians: Bushbabies New World and lemurs monkeys Apes Macmillan Learning Orangutan Old World monkeys Gibbons Great apes Gorilla Human Robust canine teeth Earlobes Bonobo Delayed puberty Chimpanzee The characters listed in the ancestral lineages certainly do not represent all the most important evolutionary changes that occurred in these ancestors. Rather, they are a sample of the changes that occurred at each stage.

Dinosaur and ancestral bird fossil data from the Triassic, Jurassic, and Cretaceous time periods were used to estimate body mass. Scientists are examining the connection between body mass, niche saturation, and extinction of species in the Triassic, Jurassic, and Cretaceous time periods. The terrestrial dinosaurs’ neck length and diet are compared to the evolution of the winged dinosaur through the three time periods.   Which of the following statements best states the null hypotheses regarding winged dinosaurs? The greater number of herbivore dinosaurs throughout all the periods inhibited the evolution of winged dinosaurs due to a lack of available resources and habitat. A greater number of winged dinosaurs of the early Cretaceous period become extinct as fewer winged dinosaurs with greater body mass evolve to take over their niche. The extinction of long-necked herbivores in the late Jurassic period provided a greater amount of habitat and food resources for early Cretaceous…

Was the ancestor of all dinosaurs feathered or scaly?  What character condition did you get? use the picture below.

Paleontologists at Grand Staircase-Escalante National Monument discovered a new ceratopsid skull. The skull has a moderate-sized neck frill, indicating a small body, and has two short horns. The table shows rock formations at the monument and the location of known fossils relative to those formations. Ceratopsid Fossil Locations Cretaceuos-Age Rocks MYA Formation Canaan Peak 70- Triceratops Torosaurus Kaiparowits 80- Centrosaurus Chasmosaurus Wahweap Straight Cliffs 90- Zuniceratops Tropic Shale Dakota San Rafael Swell 100 Protoceratopsid Based on the evolutionary relationship suggested by the anatomy of the skull, in which of the following formations was the skull found? Dakota Wahweap Kaiparowits Canaan Peak

The tree below shows a proposed phylogeny of the three broadest mammal groups. monotremes marsupials eutherians Figure 1: Phylogenetic relationsbips between defrent ypes of mammals. a. Which group of mammals branched off the earliest? b. Which letter designates the common ancestor to monotremes and marsupials? c. Indicate where on the tree (short perpendicular line) each of the following characters arose. 1. long-lived placenta 4. internal gestation (rather than in egg) 2. body hair 5. long-term gestation 3. production of milk for young 6. live birth (rather than egg laying e. Which of the above characters are shared ancestral characters of eutherians? List all that apply.

Our earliest primate ancestors, such as eosimian (a prosimian) Group of answer choices   were bipedal.   were major carnivores and hunted herd animals.   lived in trees, avoided dinosaurs and ate bugs.   spent as much time on the ground as in trees and ate bugs.