Communicable disease or also known as infectious disease is the spread of disease from one person to another in a variety of ways: through air, contact with bodily fluids, discharges or blood, direct contact, and bites. Through the years, medical science had created lots of ways to control and prevent the spread of such diseases. One of these is the development of Immunization. Immunization works by preparing the body to fight foreign microorganisms that may harm the body. This boosts the body's natural defense against bacteria and virus by allowing the body to release more antibodies. This would enable to body to recognize the possible virus or bacteria that might invade inside the system.
Periostome is found in Annelids while compact bone is found in humans
Recrystallization. During the process of metamorphism, the particle size of the rock may change by a process called recrystallization. For instance, the small calcite crystals in limestone, a sedimentary rock, change into larger crystals during formation of the metamorphic rock marble.
Answer:
this one`s been up for debate for awhile now.
1. it depends on the organism
learning about an organism could be considered 'easier' to study in different ways. for example, if you are studying marine life, you will most likely have to keep it in a water habitat to watch it alive. If you are studying a land species, then watching from it`s natural habitat will give you more accurate results. sometimes the environment can affect an organisms internal systems more than you may think. this leads into my second point.
2. it depends on what you are trying to study
if you are trying to learn about the mating process, seasonal activity, migration, or external behavior, then monitoring it from it`s natural habitat or an area that is a close copy is your best option. but if you are looking into studying internal organs/systems or cells, then in <em>most</em> cases, the organism will need to be taken out of its natural habitat. only in very careful situations is it left in a habitat during examination.
