Biology Essay Questions

Biology 1010 Essay Questions Module 12

Question 1

What are the characteristics shared by all bacteria ? Briefly discuss the range of variations that exist among bacteria

Bacteria are very small , one-celled organisms visible only through a microscope . They belong to the kingdom Procaryotae because , like all prokaryotic organisms , the bacterium cell does not contain a nucleus Bacteria thrive in different kinds of environments and form colonies of millions or billions even in a very tiny space . They are found everywhere , from the air , water , to inside the skin . Bacteria can be

br classified into three groups based on their shape : cocci (spherical spirilla (spiral , bacilli (rod-shaped . They can also be grouped according to whether they need oxygen (aerobic ) or not (anaerobic . All bacteria require carbon to survive and reproduce but while some are autotrophs (those that get their carbon from CO2 ) others are heterotrophs (those that get their carbon from organic nutrients . Some bacteria are harmful , producing diseases in other living things like those that induce food poisoning or the tetanus disease . Other bacteria however , are beneficial like those that are responsible for the production of vitamin K and B and those that aid in the digestion of food

Question 2

What characteristics are shared by all protists ? What are the major groups of protists ? What distinguishes one of these groups from the others

A protist is any organism that is not a plant , animal or fungus Protists are eukaryotes , microscopic organisms , and usually unicellular They live in a variety of...