Transcript Slide 1

By
Erick Rodriguez and sherley
Period 3
A
scientific theory summarizes a hypothesis
or a group of them that have supported with
repeated testing.
 And a law is a generalizes a body of
observation .
 A law cant be described like Newton's Law of
gravity you can use this law to predict the
behavior of dropped objects. Unlike theories,
theories can describe experiments.
 Adaptive
radiation is a change in plants or
animals due to environmental change.
 Or like moving to a new region and adapting
to the new environment in order to survive.
 Like for example the change of a birds beak
in order to get food and survive.
 Or like a moth that changed to a different
color in order to blend for it can’t be
attacked or eaten.
 Homologous
structures are similar body parts
of two organisms that share a common
ancestor.
 Even though there are two different
organisms the body parts that are similar
serve the same purpose.
 So from observing the parts that are similar
scientists concurred they come from a
common ancestor.
 Vestigial
organs are organs that no longer has
a useful function in an organism.
 These organs use to be useful for us and
other animals in the past.
 So Darwin used this as prove that we have
evolved and adapted to the change in the
environment for us and animals.
 Charles
Darwin contributions to science was
evolution and that we all come from a
common ancestor.
 Also the theory of evolution of animals and
plants through natural selection.
 And he concluded that due to long-term
environmental change like movement of land
mass and climate change we adapted and
evolved.
 The
skull develops from mesenchyme around
the developing brain.
 The skull develop due to the increasing size
of the brain the skull contains a large
flexible fibrous joints, which is called suture.
 Which allows the head to compress and pass
through the birth canal and then to expand
for the brains growth.
 The
evolution of hominids is characterized by
trends like:
 Ability to walk upright.
 Increase in brain size.
 Change in skull change
 Decrease in jaw size and angle in which jaw
protrudes from face.
 Ability to make and use tools and
communicate using language.

Homo erectus and like fossils are found in Africa,
Asia, and Europe and are dated between 1.6
million years ago to 200,000 years ago and they
have:
Larger brain
 Flatter face
 Taller
 Walked fully upright on 2 legs.
 Small groups
 Some language
 Made tools
 Used fire

A
widely distributed species
 Whose remains have been found in
Africa, Europe, India, China, and
Indonesia
 By
40,000 years ago like modern humans.
 Sophisticated language skills.
 Complicated and useful tools.
 Created art
 Learned to grow crops
Art: Cave Paintings, Venuses
Oldest paintings: Chauvet (32,000 yrs old)
Lascaux (17,000 yrs old)
Peche Merle (15,000 yrs old)
 Comparative
Anatomy are Structural
similarities link related species
 Comparative
embryology is the comparison
of the development of embryos of two or
more species.