- The ____ phylum includes cedar, juniper, fir and pine trees.
- How many taxa are the three domains subdivided into?
- Scientist have deduced that the common ancestor to all life was an organism called ____ which lived 3.5 billion years ago and parts of its DNA code can be worked out by retracing and examining the ancestries of various forms of life.
- All of the following are reasons for putting living organisms into groups according to a natural classification rather than an artificial one EXCEPT:
- Today, it is preferable to use ______ and genetics to classify organisms.
- _____ phylum includes ferns and horsetails, among others.
- It was determined that there are significant enough differences between the Old World asters and the New World asters that a reclassification was necessary. The new classification is a better reflection of which ones are more closely related to each other. The New World group was in the genus Aster, but now is in the genus ______.
- Common names do not reveal anything about a species' ______ links, but its scientific name does.
- What is important for a system of classification is that it is clear, _______, logical, easily implemented, and that there is a general consensus to apply it.
- ______ is the domain in which we find all other life besides Archaea and bacteria, from the microscopic single-celled yeast that helps bread to rise, to enormous organisms such as sequoia trees and blue whales.
- The types of archaeans that prefer extreme conditions are called ______ and include thermophiles (heat-loving), methanophiles (methane-loving), and halophiles (salt-loving).
- A good example of reclassification is a group of flowers called _____.
- At the top of the hierarchy are the three largest groups for organisms, called _______.
- The best way to establish a natural classification is to base it on _________.
- Organisms that belong to the same class also belong to the same:
- The ____ phylum includes plants of very short stature, such as mosses.
- Linnaean classification was limited to ______ characteristics, and in Linnaeus's time little effort was made to classify organisms by their ancestry because nothing was known about the genetic connection between species.
- _______ are not in any domain because they are not alive and do not necessarily share a common ancestry with each other.
- _______ are single-celled organisms that are distinct from bacteria and are very ancient.
- Grand Prismatic Thermal Springs in Yellowstone National Park. The bright colours around the edge of the hot water are caused by microbial colonies that include _____.