• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Human Body Systems DR. I MCSNEER
Human Body Systems DR. I MCSNEER

... transform it into energy (chemical) that can be used by living things ...
Introduction To Biology PowerPoint
Introduction To Biology PowerPoint

... transform it into energy (chemical) that can be used by living things ...
Chapter 4 - Living Systems: Human Systems
Chapter 4 - Living Systems: Human Systems

... of a fish’s respiratory system from the least complex to most complex? A. cells, gills, tissues B. cells, tissues, gills C. gills, tissues, cells D. tissues, gills, cells 9. Which body system typically recognizes, attacks, and destroys foreign cells or substances ...
Ch.1 Invitation to Biology - OCC
Ch.1 Invitation to Biology - OCC

... • Energy and Life’s Organization-All living things depend on Energy • Energy transfer involves producers and consumers ...
Evolution- What`s That?
Evolution- What`s That?

...  Law of use and disuse  An organism can lose or change a body feature during its life time and passes it on to their children Using it -improves 2. Not using it - disappear ...
Diversity if Life Jeopardy Questions
Diversity if Life Jeopardy Questions

... 5 The diversity of life increases as these two factors increase. HUMIDITY AND TEMPERATURE. 1 Plants are not found in deep ocean areas because of a lack of this. LIGHT 2 85% of all plants on Earth are found here. OCEAN 3 More than 20% of all known mammalian species are this animal. BAT 3 Homeostasis ...
Animal Body Systems
Animal Body Systems

...  Single celled organisms and sponges digest their ...
Diversity of Life
Diversity of Life

... Uraium-238 vs Lead-206 The transformation proceeds at a fixed rate. ...
LIfe processes 2010 living Environment
LIfe processes 2010 living Environment

... Living creatures are ORGANIZED • All made of the same collection of chemicals, but we are organized as… – organelles & cells • plant cells & animal cells ...
15.1 Notes
15.1 Notes

... for its original function, yet it is still inherited as part of the body plan for the species. i. Many organisms have vestigial structures. ...
Unicellular Organisms what are they? write down some key
Unicellular Organisms what are they? write down some key

... Some are harmful and cause diseases yet others are beneficial to us. For example, dairy products such as buttermilk, cottage cheese and yogurt are produced by the action of microorganisms. ...
16.4_Evidence_of_Evolution
16.4_Evidence_of_Evolution

... similar Hox genes, and their embryos, in early development, are also very similar. What do these similarities indicate about the ancestry of organisms A and B 3 Explanation In your own words, write a paragraph that explains how evidence since Darwin’s time has ...
Ch 16 Darwin’s Theory of Evolution
Ch 16 Darwin’s Theory of Evolution

... similar Hox genes, and their embryos, in early development, are also very similar. What do these similarities indicate about the ancestry of organisms A and B 3 Explanation In your own words, write a paragraph that explains how evidence since Darwin’s time has ...
Review Presentation
Review Presentation

... Why would an ecosystem have fewer organisms as you move up the food chain? If there is less energy passed on to each level, then there is not enough energy to support a lot of organisms at the higher levels. ...
I. Structure - Biology Diva
I. Structure - Biology Diva

... 29.1 – Sponges (phylum Porifera) I. Structure A. Not organized into tissues, has masses of specialized cells embedded in a gel-like substance called mesoglea, has cell recognition B. Asymmetrical C. Ostia – tiny openings (pores) in the body wall through which water enters D. Oscula – larger body ope ...
Document
Document

... Mutation – any change in a gene or chromosome that can either be helpful or harmful. They can affect the survival and reproduction of the organisms. They are involved in natural selection as any variation within a population can be due to a mutation. This may make the organism better adapted to the ...
You Can`t Have One Without the Other
You Can`t Have One Without the Other

... All the systems play a part. How do they interact? Which one is the most important? ...
Document
Document

... – Several amino acids formed! • Building blocks of proteins ...
100 Important Facts you need to know to pass the
100 Important Facts you need to know to pass the

... 100 Important Facts you need to know to pass the Living Environment Regents Exam TOPIC 1 1.The ability of an organism to maintain internal stability is known as homeostasis. 2.Metabolism- the sum of all the chemical reactions that occur within the cells of an organism. 3.Organic molecules contain bo ...
Chapter 15 Evolution outline
Chapter 15 Evolution outline

... How do new species arise? How does natural selection affect a population? What accounts for the diversity in the world around you? What is an adaptation? ...
Charles Darwin
Charles Darwin

... – Extra length was passed on to offspring ...
No Slide Title
No Slide Title

... What are the diameters for the field of view for the low, medium and high ...
Chapter 1
Chapter 1

...  An organ system is a group of organs that function together (example = the circulatory system)  Interactions occur among all of the levels of organization within an organism (example = the circulatory system carries nourishment from the digestive system to the muscular system ...
introduction to evolution - Fall River Public Schools
introduction to evolution - Fall River Public Schools

... • A trace of a long dead organism • Many found in sedimentary rock – Sediment deposited by wind or water – Develop from hard elements of body – Minerals replace tissue  fossil ...
S7L1. Students will investigate the diversity of living organisms and
S7L1. Students will investigate the diversity of living organisms and

... promote survival of organisms and the survival of successive generations of their offspring. a. Explain that physical characteristics of organisms have changed over successive generations (e.g. Darwin’s finches and peppered moths of Manchester). b. Describe ways in which species on earth have evolve ...
< 1 ... 80 81 82 83 84 85 86 87 88 ... 99 >

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.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report