*Homeostasis is maintaining a stable internal environment
... *Bacteria are prokaryotes so they do not have a nucleus. *Homologous structures have a similar structure but different function (human hand and bat wing). *Darwin stated the theory of natural selection or “survival of the fittest”. *Natural selection leads to traits that allow an organism to survive ...
... *Bacteria are prokaryotes so they do not have a nucleus. *Homologous structures have a similar structure but different function (human hand and bat wing). *Darwin stated the theory of natural selection or “survival of the fittest”. *Natural selection leads to traits that allow an organism to survive ...
Sponges to Ecdysozoans Practice Exam
... b. specialized cells of sponges that function to trap and eat small particles. c. cells that make up the gelatinous layer in sponges. d. cells of sponges that function to transfer nutrients to other cells. e. cells that form spicules in sponges. 6. Why aren't sponges eaten more by predators? a. They ...
... b. specialized cells of sponges that function to trap and eat small particles. c. cells that make up the gelatinous layer in sponges. d. cells of sponges that function to transfer nutrients to other cells. e. cells that form spicules in sponges. 6. Why aren't sponges eaten more by predators? a. They ...
Ch. 35 Porifera
... ody wall is 2 layers with jellylike substance between. Surrounds hollow cylinder that is closed at bottom and open at top. Interior of cylinder is lined with collar cells. *they beat their flagella and draw water in through pores. ...
... ody wall is 2 layers with jellylike substance between. Surrounds hollow cylinder that is closed at bottom and open at top. Interior of cylinder is lined with collar cells. *they beat their flagella and draw water in through pores. ...
Sponges & Cnidarians
... Phylum Porifera • Sponges – Simplest animals, multicellular – No organs or body systems – Asymmetry – Cellular digestion – Feed by filtering water – Do not move – Reproduce sexually and asexually ...
... Phylum Porifera • Sponges – Simplest animals, multicellular – No organs or body systems – Asymmetry – Cellular digestion – Feed by filtering water – Do not move – Reproduce sexually and asexually ...
Zoology - AspenbiologyII
... “porus” means pore and “fera” means to bear Primarily marine animals, although some freshwater varieties exist. ~9000 species Vary in size from less than a CM to several meters across/tall Strong evidence from cell structures suggest that sponges as well as most animals evolved from Protis ...
... “porus” means pore and “fera” means to bear Primarily marine animals, although some freshwater varieties exist. ~9000 species Vary in size from less than a CM to several meters across/tall Strong evidence from cell structures suggest that sponges as well as most animals evolved from Protis ...
Throwback Thursday #5
... 2. What body system is responsible for pumping blood and carrying oxygen to cells? circulatory 3. What body system is responsible for breaking down food? digestive ...
... 2. What body system is responsible for pumping blood and carrying oxygen to cells? circulatory 3. What body system is responsible for breaking down food? digestive ...
Bell Pettigrew Museum of Natural History - synergy
... differ from the typical animal form in that they: 1. show no system of symmetry and therefore have no dorsal or ventral surface and no anterior or posterior polarity. 2. lack any nervous or muscular cells. 3. are not composed of tissue and organs, but are constructed of individual cells. Poriferans ...
... differ from the typical animal form in that they: 1. show no system of symmetry and therefore have no dorsal or ventral surface and no anterior or posterior polarity. 2. lack any nervous or muscular cells. 3. are not composed of tissue and organs, but are constructed of individual cells. Poriferans ...
BioInquiry Micromodule Worksheet
... Use the “Hints” or search on your own to help answer the following inquiries. Use this worksheet to record your answers or attach your own report. Enjoy your search. 1. What are some of the advantages to being multicellular as opposed to unicellular? ...
... Use the “Hints” or search on your own to help answer the following inquiries. Use this worksheet to record your answers or attach your own report. Enjoy your search. 1. What are some of the advantages to being multicellular as opposed to unicellular? ...
Precambrian body plans
Until the late 1950’s, the Precambrian era was not believed to have hosted multicellular organisms. However, with radiometric dating techniques, it has been found that fossils initially found in the Ediacara Hills in Southern Australia date back to the late Precambrian era. These fossils are body impressions of organisms shaped like disks, fronds and some with ribbon patterns that were most likely tentacles.These are the earliest multicellular organisms in Earth’s history, despite the fact that unicellularity had been around for a long time before that. The requirements for multicellularity were embedded in the genes of some of these cells, specifically choanoflagellates. These are thought to be the precursors for all multicellular organisms. They are highly related to sponges (Porifera), which are the simplest multicellular organisms.In order to understand the transition to multicellularity during the Precambrian, it is important to look at the requirements for multicellularity—both biological and environmental.