supercontinent known as Pangaea. This was the first time in history where continental or land mass exceeded that of the ocean. This was also before dinosaurs of the Triassic period roamed Earth, during this time animals such as the therapsids, and Synapsids such as the Pelycosaurs, insects and amphibians also occupied Earth. Fauna that existed during the Permian period includes Gymnosperms, or seed producing plants such as the Conifers. Other animals that existed during this time include marine life
Throughout Earth’s history there have been many changes. These changes have consisted of temperature fluctuations, atmospheric differentiations, extinctions of various plant and animal life, etc. Over time everything seems to have evolved in some way form or fashion. However, the Permian Era extinction was different from all the rest. This extinction affected every form of life, but especially the marine life. Researchers have stated that 93-97% of all Earths species went extinct during this period
Exam 2 Colette Cabaniss Student K00479544 (colettecabaniss@yahoo.com) login:fireant Question 1 Echinoderms are captivating organisms. They have a number of specialized structures and functions. They have unique water vascular systems, aboral surfaces, and feeding structures. This sets them apart from other animals because of their distinct characteristics. The water vascular system of echinoderms is a hydraulic system that they use for respiration, getting rid of waste, and a way of movement
Introduction The Permian-Triassic extinction event is undoubtedly the largest extinction event the Earth has ever seen. While evidence shows that it occurred over a great amount of time, it was effective in causing the extinction of an incredibly large portion of life on Earth. To such an extent that it took millions of years before any large amounts of biodiversity occurred again. This is why it is also referred to as the ‘Great Dying’. This paper will will analyze the survivability of terrestrial
The Integument: List the embryonic germ layers that the epidermis and dermis are derived from (be specific for the dermis). (2 points) Dermis is derived from the mesoderm. It is made up of layers of cells that originate from the bottom most layer called the stratum basale, which is constantly undergoing mitosis. The epidermis is derived from the ectoderm. The development of hair, feathers, teeth, and scales all depend on the same structure. What is it called? (2 points) Dermal papilla How
There are three different ways that frogs show parental care to protect their young. There are many species in which the adult frog guards over the eggs. The sex of the frog that guards the eggs all depends on the species. In some species the male watches over them and in other cases the female is the one who is doing the protecting. But in some cases it is not known whether it is the female or male because the external characteristics of both sexes are very similar. Some of these species lay their
"era of mammals". It produced adaptive emission in the mammals. Extinction of many reptilian lineages also persent in this period. 1.Evolution of pelycosaurs Mammalian characteristics evolved gradually over a period of 200 million years. The early synapsids were the pelycosaurs. Some of them were herbivores. The others were predators. Thay showed skeletal adaptations for voracious life. 1. Evolution of therapsid Some other mammal like reptiles arise from the pelycosaurs by the center of Permian period
The Evolving Planet exhibit at Chicago’s Field Museum opened in 2006, and has become a popular permanent exhibit at the museum especially for students learning about biology. The exhibit is a well-funded demonstration of evolution on earth. The museum takes users from single cell organisms through to eons of life on earth through to modern man. The exhibit has both interactive and visual displays as well as carefully prepared videos. The exhibit attractions is a scientific connection of evolution
it seems like a rather simple question, it is a topic that has been recently researched so that scientists can feel reassured in creating anatomically correct models of dinosaurs. Amniotes (a group which in the Triassic spilt into reptiles and synapsids and which include dinosaurs), have large nasal openings, but since the nostril is made up of flesh and cartilidge, it is almost always not preserved in the fossil record (Lauren and Gauthier 1996). These were often huge in dinosaurs, such as the
One important topic about evolution is speciation and how species speciate, what this means is how some species diverge into a new and distinct species through the course of evolution. Speciation can happen because of various reasons, the most known are the following four, allopatric, peripatric, parapatric, and sympatric speciation. We are going to try and focus on a different aspect of speciation and that is chromosomes. We are going to look at how the mechanisms of evolution have aided with the
Precambrian Geologic The Precambrian era is about 90% of the earth’s geologic life. It refers to all geologic time before 600 million years ago. During the Precambrian era, the earth formed along with the oceans and atmosphere. Originally, the earth was in a molten state, but as it cooled down, it developed a hard crust and oceans that developed water vapor to form an atmosphere. About five hundred million years after the earth was formed, small continents started to form. The plate tectonics also