• 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
KeystoneReview Guide Cells
KeystoneReview Guide Cells

... network of flattened membranes forming tunnels, have ribosomes embedded, produces proteins for exportation/transport network of flattened membranes forming tunnels, assists with making some lipids and finalizing some proteins stacks of flat membranes, where export proteins are modified and stored pr ...
Species
Species

... determine how much time has elapsed since the rock was formed and cooled.  Common isotopes used for long-term dating (old rocks) include uranium as it decays to lead, and potassium as it decays to argon.  The carbon-14 isotope can be used for dating of more recent fossils and artifacts ...
Evolution - Westlake FFA
Evolution - Westlake FFA

... determine how much time has elapsed since the rock was formed and cooled.  Common isotopes used for long-term dating (old rocks) include uranium as it decays to lead, and potassium as it decays to argon.  The carbon-14 isotope can be used for dating of more recent fossils and artifacts ...
1) Which of the following is not true of
1) Which of the following is not true of

... to maintain homeostasis to carry on chemosynthesis to transmit impulses between cells to fight infection Many types of bacteria live in the human body. Listed below are some of the roles bacteria have in different environments. ...
BioBoot Camp – Cells
BioBoot Camp – Cells

... network of flattened membranes forming tunnels, have ribosomes embedded, produces proteins for exportation/transport network of flattened membranes forming tunnels, assists with making some lipids and finalizing some proteins stacks of flat membranes, where export proteins are modified and stored pr ...
Review Guide Cells
Review Guide Cells

... network of flattened membranes forming tunnels, have ribosomes embedded, produces proteins for exportation/transport network of flattened membranes forming tunnels, assists with making some lipids and finalizing some proteins stacks of flat membranes, where export proteins are modified and stored pr ...
Microbiology Term Paper
Microbiology Term Paper

... Unfortunately, the origin of life and its form is still unknown, but it is understood that the current lineage of life originated at least 3.9 billion years ago, if not later, due to the fact that at an earlier time, the Earth was still being bombarded by debris in the inner solar system with enough ...
Levels of Organization - Ms. Pollei`s Science 7
Levels of Organization - Ms. Pollei`s Science 7

... many systems in the human body, as well as in many other organisms. It is made up of the heart and blood vessels.  Function: the circulatory system transports oxygen and food to all cells in the body through the blood ...
practice week 12 qwest
practice week 12 qwest

... b. All living things grow and develop d. All living thing make food 31. Different _________ work together in an tissues a. Organ systems b. cells ...
Phylum Cnidaria (pŕhlivce)
Phylum Cnidaria (pŕhlivce)

... https://www.youtube.com/watch?v=hUTr0ufJGgo ...
Document
Document

... (1) disruptions of the natural balance (2) the interdependence of living things (3) adaptations for survival under certain conditions (4) involuntary responses to stimuli ...
Body Systems Quiz
Body Systems Quiz

... 19. What are the 3 functions of the cardiovascular system? CARRY NEEDED SUBSTANCES TO CELLS CARRY WASTE PRODUCTS AWAY FROM CELLS CARRY CELLS THAT FIGHT DISEASE ...
16.4 Evidence of Evolution - Since Darwin`s work, every scientific
16.4 Evidence of Evolution - Since Darwin`s work, every scientific

... Closely Related but Different - Over time, natural selection can produce variations among populations that resulted in different, but closely related species that are separated by some structure (like islands) Distantly Related but Similar - Similar habitats around the world are home to distantly re ...
Evidence of Evolution
Evidence of Evolution

... up with this cladogram as a group. It is the current accepted theory of how terrestrial mammals evolved into aquatic mammals. • Can this theory change? • If no, why not? • If yes, what has to happen? ...
Evolution 3/2/14
Evolution 3/2/14

... paleontologist rather than a dentist? ...
Evolution
Evolution

... organisms fossil – preserved remains of ancient organisms 4.5 billion years – estimated age of Earth paleontologists – scientists who study fossils ...
Zoology
Zoology

... Epithelial-sheet of cells that cover an external or internal surface: lines organs of body cavities, ducts and passageways, classified by cell form and number of cell layers 2. Connective-bind, support functions, widespread in the body, loose connective tissue fibers or dense fibers made of tendons ...
PowerPoint
PowerPoint

... develop a similar characteristic to perform the same function even though they don’t have a common ancestor. You have seen this before in analogous structures. Birds and flying insects have a common characteristic because it aids in their survival, not because they both have bones in their wings. ...
Name Date ______ Period
Name Date ______ Period

... organisms. For example, a specialized leaf of the Venus’ flytrap senses the light footsteps of a soon-to-be-digested green bottle fly. The plant responded to this environmental stimulus by rapidly folding the leaf together. An organism must respond to changes in the internal environment as well. Int ...
Lesson 4. Proof of Evolution - Blyth-Biology11
Lesson 4. Proof of Evolution - Blyth-Biology11

... • Dead animals and plants usually decompose, but sometimes they get buried by sediment and, in the right conditions, harden into fossils • Bones or material may decay, but water or minerals seep into the impression left by the original material • Water and minerals continue to dissolve the original ...
What You Absolutely Must Know to Pass the NYS Living
What You Absolutely Must Know to Pass the NYS Living

... energy for their own needs, most energy is lost before it can be passé to the next step in the food chain. As a result, organisms high on the food chain have less energy available to them and must have smaller populations. D. Environmental factors (air, water, light, temperature, pH, food, predators ...
Life Science CRCT Study Guide 1
Life Science CRCT Study Guide 1

... desired traits or features. Heredity- is the passing of traits from parents to their offspring Characteristics –is a feature that has different forms Incomplete dominance– both parents influence the offspring/one white and one red and the offspring is pink Alleles –different versions of a gene Punne ...
The Characteristics of Living Things: Biology Scientists are
The Characteristics of Living Things: Biology Scientists are

... Present-day taxonomists, on the other hand, classify organisms in a way that shows evolutionary relationships. They must consider organisms that existed in the distant past as well as those that exist in the present. And they classify organisms using characteristics that are proven to be good indic ...
LT #4 I can describe that cells differentiate to form
LT #4 I can describe that cells differentiate to form

... differentiate to form specialized cells, tissues, organs, organ systems, and organisms. ...
Keywords Biology B1 Metabolism All the chemical reactions going
Keywords Biology B1 Metabolism All the chemical reactions going

... Adaptation of a cactus to have leaves with reduced surface area and pointed ends. ...
< 1 ... 58 59 60 61 62 63 64 65 66 ... 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