Adaption and survival of organisms in changing environment

• refers to the variety of species present in a particular area, habitat or ecosystem. This increases the probability of adaptation and survival of organisms in a changing environment


  Species Biodiversity
• •Developed one of the first theories on how species changed.

  Jean Baptiste De Lamarck
• Lamarck’s Theories on Evolution.

  Theory of need

  Theory of Use and dis-use

  Theory of Acquired Characteristics
• His theory of evolution by natural selection became the foundation of modern evolutionary studies

  Charles Darwin
• Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success.


  Natural selection
• Bob believes that giraffes have long necks because they have stretched their necks to try and reach food that is high in trees. Since the parent had stretched its neck, it passed the long neck on to its offspring.


  Jean baptise Lamarck
• Ryan believes that giraffes have long necks because the ones with long necks were able to reach the food, and those with short necks could not and died. The long-necked giraffes reproduced, and soon all the giraffes had long necks

  Charles Darwin
• A process that results in changes in the genetic material of a population over time.


  Evolution
• The geologic time scale is the “_____________” for events in Earth’s history.


  Calendar
• traces of organisms that lived in the past and were preserved by natural processes or catastrophic events.


  Fossils
• is the process by which the remains of plants and animals are preserved in rock or sediment, creating a fossil.


  Fossilization
• The organic matter in an organism is preserved 


  Compression
• type of trace fossils. ___________ fossils form when a leaf. shell, skin, or foot; no organic material

  Impression
• This is based on the location where a given fossil occurs in a layered sequence of sedimentary rocks.


  Relative dating
• Calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element

  
  

  Radiometric Dating
• 2 types of Comparative anatomy

  Homologous Organs

  Analogous Organs
• refers to the variety and extent of differences among living things.

  BIodiversity
• a situation in which something such as an economy, company, or system can continue in a regular and successful way without unexpected changes

  Stability
• refers to the variety of species present in a particular area, habitat, or ecosystem. This increases the probability of adaptation and survival of organisms in a changing environment.


  Species biodiversity
• evolutionary process wherein organisms become well suited to live in a particular habitat.

  Adaptation
• These are the physical adaptation or the physical changes in an animal


  structural adaptation
• Two categories of fossils

  Body Fossils

  Trace Fossils
• Plant and animal remains, such as leaves, teeth, and bones

  Examples: Skeletons, skin, leaves, wood, and bark

  Give an idea about the appearance of early life

  Body Fossils
• A fossil of a footprint, trail, burrow, or other traces of an animal rather than of the animal itself

  Examples: Footprints, predation traces, bodily wastes, burrows, eggs, and stromatolites

  Give an idea about the movements, activities, and behavior

  Trace fossils
• The study of the history of life on Earth is based on fossils.

  Paleontology
• The embryos of various species show similar structures till a certain period of gestation. They develop into their respective species as they grow.

  Embryonic Development