Transcript Bell Ringer - Harlan Independent Schools

Bell Ringer
List 3 examples of phenotype
 I can describe non-living influences
on changes in the environment.
Genetics
 What is genetics?
 Phenotype— Who can tell me
…………….
 Genotype– Who can tell me……….

Environmental Non-living
influences
 limit whether a species can survive in a habitat

Examples:
 Pollution
 Fire
 Height of a mountain
 Volcanic eruption
 Periodic flooding of rivers
 What changes happen as you travel up the
mountain? Visualize….
 Brain Storm: Take 2 min. with you neighbor
 Think about what changes as you travel up the
mountain. Plant & Animal differences…
 The environment gradually changes as you go up
the mountain.
 Temperature decreases
 Wind usually increases
 At high elevation, trees can be short and stubby
 Above certain elevations (trees
don’t grow at all)
 Animals are found also vary at
different elevation
Nepal
 Nepal is one of the richest countries in the world in terms of biodiversity due to its unique geographical position and altitude
variation. The elevation of the country ranges from 60 meters
above sea level to the highest point on earth, Mt. Everest at 8,848
meters, all within a distance of 150 kilometers resulting in climatic
conditions from sub-tropical to arctic.
 This wild variation fosters an incredible variety of ecosystems, the
greatest mountain range on earth, thick tropical jungles teeming
with a wealth of wildlife, thundering rivers, forested hills and
frozen valleys.
 Within this spectacular geography is also one of the richest
cultural landscapes anywhere. The country is a potpourri of
ethnic groups and sub-groups who speak over 93 languages and
dialects. Nepal offers an astonishing diversity of sightseeing
attractions and adventure opportunities found nowhere else on
earth. And you can join in the numerous annual festivals that are
celebrated throughout the year in traditional style highlighting
enduring customs and beliefs
Species and the
Environment
 Natural Selection
 Mutation
 Selective breeding
 Direction of evolution
 Extinction of a species
Natural Selection
 According to Darwin and Wallace
changes happen from generation to
generation that result in adaptations to
the environment.
 Evolution—the change in genetics of a
species over time.
 Natural selection—the proposed
organisms that are better adapted
to an environment survive and
reproduce at a greater rate than
others.
 Fittest survive
 Mutation– is the process in which
DNA results in new alleles.
Some of these produce–
 Mutations for improved adaptations
and reproduction.
Homework
• List some nonliving factors in the
environment that can cause change in
species over several generations.
• Compare selective breeding and natural
breeding.
• How are evolution and extinction related?
• What are some (3) changes made by humans
in the area where you live that might affect
some of the species in Harlan.
 Reading
pages 38-56
 Reading checks pages
39,41,44,46,50,
 WRITE the question and the
complete answer.