Mar 301 Quiz

3. Identify the 3 domains of living things. Which domains include one-celled organisms with no nucleus?

Kingdom: Animalia, it's an organism who is multicellular meaning eukaryotic and can move anywhere by itself though its lifespan.

Name and describe the roles of the three main trophic categories that make up the biotic structure of every ecosystem. Give examples of organisms from each category.

#1. The dirt considered living because it has all the kingdoms of life in it.

6. What kingdom are algae classified? The classification of algae is not yet settled, however, there are different divisions of kingdoms. Chlorophyta (Green Algae), Kingdom Rhodophyta (Red Algae), Halophyte (Brown Algae), Chrysophyta (Golden Algae, Yellow-Green Algae, and Diatoms) What domain? Eucaryotes-eucaryotic photosynthesizers (plants) Algae are classified by their photosynthetic absorption spectra.

b) Go online and research. Give at least three examples of actual species that were present in the Devonian period. What is the point, if there IS any point, to naming and describing species that went

Clumps together, ability to keep water in its shell and release it as needed to stay moist

They are known as a diverse group of unicellular eukaryotic organisms. They are also defined as a single celled organism with animal like behaviour. Protozoa are microscopic cells that range from a size from 10 to 52 micrometers. Some protozoa are larger than most. For example the xenophyophores are around 20 centimetres in diameter. Free living forms are restricted to moist environments, such as soil, mosses and aquatic habitats. Many protozoa are symbionts.

1. Did the construction of the phylogenetic tree based on the 14 living Caminalcules change the way you would group Caminalcules species in your taxonomic classification (chart)? What does this suggest about classification based on strictly of similarity versus evolutionary relationship?

The purpose of this study is to identify four unknown organisms. The unknown organisms have been assigned randomly to six-research groups by Professor Hoffman. Each research group was provided two eukaryotes and two prokaryotes. The unknown organisms will fall into the following classifications: bacteria, algae, fungi, or protozoans. All living organisms are organized into one of three domains of life, Bacteria, Archaea, and Eukarya.

Microscopic  organisms  known  as  cyanobacteria are  interesting  for  the  following  reasons: [SELECT  ALL  THAT  APPLY] Select  one  or  more: A.  Oxygen  produced  by  their  photosynthesis is  thought  to  be  responsible  for  the  "great oxygenation  event"  about  2.3  billion  years ago.   B.  The  methane  they  produce  is  a greenhouse  gas  that  could  have  helped warm  the  early  Earth,  helping  to  resolve  the Early-­faint-­Sun  paradox. C.  The  chloroplasts  that  carry  out photosynthesis  in  green  plants  are evolutionary  descendents  of  early cyanobacteria.   D.  They  are  known  to  be  the  earliest  forms of  life  on  Earth.

Stromatolite forms and is the first organisms on the earth they were formed by very thin layers of single-celled organisms.

Uncovering and categorizing different organisms, as they relate to groups we are currently aware of, has been a scientific mission for centuries. One of the copious conflicts with naming newly discovered groups is that our system for classifying is still developing. Blurred lines and special exceptions make scientists question when its truly appropriate to declare one species separate from another.

Prokaryotic Cells All living things are made of cells, and cells are the smallest units that can be alive. Life on Earth is classified into five kingdoms, and they each have their own characteristic kind of cell. However the biggest division is between the cells of the prokaryote kingdom (monera, the bacteria) and those of the other four kingdoms (animals, plants, fungi and protoctista), which are all eukaryotic cells. Prokaryotic cells are smaller and simpler than eukaryotic cells, and do not have a nucleus. Prokaryotic means 'pre-nucleus' and eukaryotic means 'true nucleus'.

A single-celled eukaryote or protist can carry chlorophyll (it can be an autotrophic, photosynthetic, "alga"), it can eat other organisms (it can be an organotrophic, "protozoan" "animal"), or it may do both.