SECTION 1 3 STUDYING LIFE Biology Flora Biology
SECTION 1 -3 STUDYING LIFE Biology Flora
Biology � Biology – the study of life � Branches of biology include: � Zoology – study of animals � Botany – study of plants � Microbiology – study of microorganisms � Cell Biology – study of cells � Ecology – study of ecosystems
Characteristics of Living Things(8) � Living things are composed of cells � Cells � – basic unit of life Living things reproduce � Cells can produce through asexual or sexual reproduction Sexual reproduction – cells from two different parents unite to produce the first cell of the new organism Asexual reproduction – process by which an organism reproduces by itself
Characteristics of Living Things Cont. � � Living things contain DNA and use the same genetic code Living things grow and develop � Cells divide through a process called mitosis which makes more cells � Living things must obtain energy and molecules � Metabolism – chemical reactions in which organisms build up or break down materials as it carries out life processes.
Characteristics of Living Things Cont. � Living things respond to their environment � Stimulus � – a signal to which an organism responds Living things maintain a stable environment � Homeostasis � – maintaining a stable environment Living things change over time � Age � Evolve
Metric System � Basic Units: � Mass – gram � Volume – liter � Length – meter � Temperature – centigrade
Other Topics � � � Dimensional analysis/conversion facts Using metric system Microscopy � Parts of microscope � Using a compound light microscope � Calculating magnification
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