Biology Questions

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 _____.