Week Seven Notes: The Stepsirhines: Lemurs and Lorises Prosimians(Same thing as Stepsirhines): Lemurs, Lorises, Tarsiers: Most primitive of the primates Exhibit the fewest derived traits (as a group) of all primates Ancestral Characteristics (ie. Inherited from mammals) • Rely more on olfaction • Moist noise and long snout • Eyes slightly more lateral Classification of Prosimians: Lemurs, Lorises, and Tarsiers Order- primates Suborder: Strepsirhines (used to be Prosimians)…
Clues to the age of the fossil came from key features in the landscape; such as…
Fossils help determine the relative age of strata because when a scientist discovers that fossil they can then place a time frame of when that organism was alive. Scientist’s already have certain time frames that they follow, so when they find a fossils that are within that strata then they can determine when that organism was alive they can then place that organism into that time frame. All three of the localities which are Paradoxides pinus within the Paleozoic Era, Billingsella corrugate which is also in the Paleozoic Era, then there is Perisphinctes tiziani I believe, which is in the Mesozoic Era, and last the Dictyoclostus americanus which is located in the Paleozoic Era, all of these are within the same relative age they are found within the same time frame as each other. The only thing that was missing in the figure on pg.68 figure 3.6 was layer D this may have been because of possible erosion or it may have never deposited at all. That is very likely that it may have existed at one time, but the erosion from may have destroyed it. Although some scientists may argue that fossils are not a good way to determine the age of some organisms I feel as though it is a good way because the fossil is found in that layer of strata so therefore it should be placed in that time frame. The fossils that where found were between the Paleozoic Era and the Mesozoic Era because of this knowledge the scientist can determine that the fossils that were found are probably between 65 million years to 251 million years old. This allows scientists to see how the Earth has changed or evolved over the different Eras.…
Evert, RF & Eichhorn, SE. 2013. Raven Biology of Plants, 8th ed. USA: W.H Freeman and Company.…
"Glossteris Browniana Permian Plant Fossil." Permian Plant Fossil Glossteris Browniana. N.p., n.d. Web. 08 Aug. 2012. <http://www.fossilmuseum.net/plantfossils/Glossopteris-browniana/Glossopteris.htm>.…
Jared Diamond uses a variety of resources to answer Yali’s question. He uses radio carbon evidence to show when and where certain plants or animals were…
46. During germination in most angiosperm seeds, food for the growing embryo is provided by the…
evidence of seeds found in Ecuadorian caves from up to 12,000 years ago. Squash was…
species have provided valuable insights into angiosperm (flowering plant) genome structure, function and evolution. For example, A. thaliana has experienced two genome duplications since its divergence from Carica, with rapid DNA sequence divergence, extensive gene loss and fractionation of ancestral gene order eroding the resemblance of A. thaliana to ancestral Brassicales1. Compared with an ancestor at just a few million years ago, A. thaliana has undergone a ~30% reduction in genome size2 and 9-10 chromosomal rearrangements3,4 that differentiate it from its sister species Arabidopsis lyrata. Whole-genome duplication has been observed in all plant genomes sequenced to date. A. thaliana has undergone three paleo-polyploidy events5: a paleohexaploidy (γ) event shared with most dicots (asterids and rosids) and two paleotetraploidy events (β then α) shared with other members of the order Brassicales. B. rapa shares this complex history but with the addition of a wholegenome triplication (WGT) thought to have occurred between 13 and 17 million years ago (MYA)6,7, making 'mesohexaploidy' a characteristic of the Brassiceae tribe of the Brassicaceae8.…
Briefly describe their religion and how it is interrelated in everything they do. What is a mama? Describe the mamas and their religion using anthropological concepts related to religion. What is their prediction for the world? What kind of evidence are they using to support their prediction?…
MM.19 Which scientist is considered to be the first student of natural history, the study of the variety…
b. Linneaus: developed binomial nomenclature system, nested classification system (KPCOFGS). Did not ascribe similar characteristics to evolution, but to pattern of creation.…
Angiosperms have a wide distribution in the biosphere and the largest number of species in the plant kingdom. An angiosperm is seed plant that produces flowers and fruits. Angiosperms are divided into monocots and eudicots. They are classified in Anthophyta. There are four structures for reproduction found in angiosperms. These structures include fruits, petals, stamen, and carpel. Fruits, which are the matured ovaries of plants helps to disperse the seeds of angiosperms. By being tasteful, more animals are attracted to the fruit therefore allowing the fruit to be dispersed. The petals of the flower attract pollinators, due to their appearance. Flowers have evolved to attract animals to transfer pollen between individuals in dispersed populations. Stamens are the male reproductive structure, they produce microspores in the anthers of a flower to produce pollen grains. Pollen is able to be transferred by wind due to its waterproof coating. The carpel of an angiosperm is the female reproductive structure, which produces female gametophytes with eggs. The carpel helps to create and ovule. The ovule protects the eggs and zygote, it is an a adaptation which increases reproductive fitness.…
Drugs: Angiosperms (flowering plants) first evolved toward the end of the dinosaurs’ reign. Many of these plants contain psychoactive agents, avoided by mammals today as a result of their bitter taste. Dinosaurs had neither means to taste the bitterness nor livers effective enough to detoxify the substances. They died of massive overdoses.…
These one-celled organisms helped to make the air and water around the Earth full of oxygen, forming new life. Next, photosynthetic organisms became part of Earth by using carbon dioxide from the atmosphere, and releasing oxygen. The last life form to develop in this era were simple soft bodied animals, since soft bodies do not have vertebrates there are not many fossils as evidence from this era. Scientists know that one-celled organisms, photosynthetic organisms, and soft bodied animals were the first species on earth by the following information, “The amount of C-14 in any sample of carbon containing material can be found by measuring the level of radioactive decay, and comparing that with the decay rate observed in a carbon sample exposed to the continual mixing at the surface of the earth of C-12 and C-14 produced in the upper atmosphere. Using the ratio of C-14 to total carbon, one can determine the age of the sample.” As a culmination, carbon dating, examining index fossils, and using relative dating reveal to scientists the milestone of the first organisms in the Precambrian…