LIVING THINGS AND NON-LIVING THINGS
There are only two categories of things on earth, they are living things and non-living things. Living things includes plants and animals. Non-living thing are those things that doesn’t have life in them.
Examples of living things includes man, rabbit, dogs, monkeys, lizards, cattle and grasses/weeds etc, while non-living things are tables, chairs, iron, glass, plates etc.
CHARACTERISTICS OF LIVING THINGS
ALL LIVING THINGS ARE DISTINGUISHED FROM NON-LIVING THINGS BY A WHOLE LOT OF DIFFERENCES. This distinguishing factors are what is known as the characteristics of living things.
So the following are generally considered as the characteristics of living things.
1. MOVEMENT: movement is defined as the ability of an organism, either in part or whole from place to place in search of food or comfort, reproduction and as a means of escape from danger. Generally most animal can move from place to place in search of food, while most plant can only move part of their body in response to stimuli unless for a few microscopic plants which are capable of complete movement.
2. NUTRITION. Nutrition is defined as the ability of living things or organism to feed. The major reason for feeding in living things is to enable them carry out life process like growth, reproduction, respiration and movement. Although most green plants can manufacture their own food through a process known as photosynthesis, known also as autotrophic nor holophytic nutrition. Animals cannot manufacture their own food hence depends on food manufactured by plants, and this type of feeding is known as heterotrophic or holozoic nutrition.
3. RESPIRATION. Respiration is defined as the exchange of gases between organisms and their environment. The main purpose of respiration is to break down/burn down or oxidize food substances in order to release energy that is used for all their life processes.
4. EXCRETION. Excretion is defined as the removal of metabolic wastes from the body of any living thing. The purpose of excretion is to remove the metabolic waste products from the system, e.g. water and carbon dioxide in animals, which are toxic to the body.
So the process of getting rid of these waste materials from the body is called excretion.
5. IRRITABILITY. Irritability is defined as the ability of an organism to respond to stimuli. All living thing exhibit sensitivity in order to enable them survive in their environment. In clear terms, stimuli means the ability of any living thing to respond to changes that occurs within their environment.
6. GROWTH. Growth is defined as the irreversible or permanent increase in size, mass, or weight of an organism. It is most known as the increase or addition living proton plasmic materials within the cell of the organism. The purpose of growth is to enable the organism to repair or rebuild worn out tissues in their body..
7. REPRODUCTION. This is defined as the ability of living organism to produce or give birth to offspring or young ones after its kind in order to enable continuity of life. So in practical terms, reproduction occurs in two forms. They are
i. ASEXUAL REPRODUCTION. This takes only one organism to reproduce its kind or another offspring.
ii. SEXUAL REPRODUCTION. This process of reproduction involves two organism coming together for the purpose reproduction.
8. ADAPTATION. This is simply the way living things interact with their environment. Or better known as survival process of living things.
9. DEATH. All living things must die. Which means they are limited to a certain number of years to live before they die.
10. COMPETITION. This is the ability of living things to struggle or compete for life necessities in order to survive. Living things compete for food, water, air, space, mates and light.
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HERE YOU WILL FIND EVERY AVAILABLE TOPICS ABOUT AGRICULTURAL SCIENCE AND BIOLOGY. AND THE LINKS TO THEIR VARIOUS SOURCES.
1. DEVELOPMENT OF AGRICULTURE
2. IMPORTANCE OF AGRICULTURE
3. SUBSISTENCE AGRICULTURE
4. COMMERCIAL AGRICULTURE
5. PROBLEM OF AGRICULTURAL DEVELOPMENT
6. SOLUTIONS TO POOR AGRICULTURAL DEVELOPMENT
7. AGRICULTURAL LAWS AND REFORMS
8. ROLES OF GOVERNMENT IN AGRICULTURAL DEVELOPMENT
9. AGRICULTURAL POLICIES
10. PROGRAM PLANNING IN AGRICULTURE
35. WILDLIFE CONSERVATION
36. FACTORS AFFECTING LAND AVAILABILITY
39. BIOLOGICAL FACTORS
40. SOCIAL-ECONOMIC FACTORS
41. ENVIRONMENTAL FACTORS AFFECTING AGRICULTURAL PRODUCTION
42. CLIMATIC FACTORS AFFECTING AGRICULTURAL PRODUCTION
47. SOLAR RADIATION
48. BIOTIC FACTOR AND AGRICULTURAL PRODUCTION
52. SOIL MICRO-ORGANISMS
53. SOIL PH
54. ROCK FORMATION
55. IGNEOUS ROCK
56. SEDIMENTARY ROCKS
58. SOIL AND ITS FORMATION
59. FACTORS OF SOIL FORMATION
60. LIVING ORGANISM
61. PARENT MATERIALS
62. SOIL FORMATION TOPOGRAPHY
63. PROCESS OF SOIL FORMATION
65. PHYSICAL WEATHERING
66. CHEMICAL WEATHERING
73. BIOLOGICAL WEATHERING
74. CHEMICAL AND BIOLOGICAL COMPOSITION OF THE SOIL
75. SOIL WATER
76. MICRO AND MACRO NUTRIENTS
77. SOIL MICRO ORGANISM
78. PROPERTIES OF SOIL
79. SOIL STRUCTURE
80. SANDY SOIL
81. CLAY SOIL
82. LOAMY SOIL
83. SOIL TEXTURE
84. IDENTIFICATION OF SOIL TYPES THROUGH EXPERIMENTS
85. RETENTION OF WATER BY VARIOUS SOIL TYPES
86. DETERMINATION OF SOIL PH REACTION
87. COLORIMETRIC DETERMINATION OF SOIL PH LEVEL
88. PH SOIL TEST
89. PLANT NUTRIENTS
90. MACRO NUTRIENTS IN GENERAL
112. THE MAINTENANCE OF SOIL FERTILITY
113. CROP ROTATION
114. APPLICATION OF ORGANIC MANURES
115. FARM YARD MANURE
116. APPLICATION OF INORGANIC MANURE
118. FARMING PRACTICES
119. BUSH BURNING
121. FERTILIZER APPLICATION
122. ORGANIC MANURING
123. FARM YARD MANURE
126. CROP ROTATION
133. FARM POWER AND MACHINERY
134. SOURCES OF FARM POWER
135. HUMAN SOURCE
142. FIELD MACHINES
164. SIMPLE FARM TOOLS
165. AGRICULTURAL MECHANIZATION
166. THE CONCEPT OF MECHANIZATION