This document provides an introduction to the key concepts in life science. It outlines the learning competencies which include explaining the evolving concept of life based on evidence, describing classic experiments on the origin of life, and describing how unifying themes show connections among living things. The topics are divided into the historical development of the concept of life, the origin of the first forms of life, and unifying themes in the study of life. It also discusses the characteristics of life and various theories on how life first originated on Earth.
39. • Italian scientist
• designed a scientific experiment to test the
spontaneous creation of maggots by placing
fresh meat in each of three different jars.
40. He successfully demonstrated that the maggots
came from fly eggs and thereby helped to
disprove spontaneous generation. Or so he
thought.
46. • notable French
scientist
• accepted the
challenge to re-
create the
experiment and
leave the system
open to air.
47. • He subsequently designed several bottles
with S-curved necks that were oriented
downward so gravity would prevent
access by airborne foreign materials
48.
49. He reasoned that the
contamination came
from life-forms in the
air. Pasteur finally
convinced the
learned world that
even if exposed to
air, life did not arise
from nonlife
60. Nutrient-rich
environment
filled with
reactive gases
and catalysts,
creates a
habitat
teeming with
life.
http://www.mbari.org/mbari-
discovers-new-deep-sea-
hydrothermal-vents-using-sonar-
mapping-robot/
SubmarineHydrothermal Vents
72. Interaction with the
Environment
• No organism is completely
isolated from its
surroundings
• Living requires a daily
balance of such “inputs”
and “outputs”.
73. 5. What happens to the
chemical energy stored in
the food the consumers
eat?
74. Energy and Life
Itisconvertedtootherformsof energy
Moving, thinking, breathing, seeing, and
everything else you do require your cells to
convert someof thechemicalenergy of food
intootherformsof enerty
.