11/4 You should know
The Phylogeny of Life
The ancestor/descendant relationships which connect
all organisms that have ever lived.
The Biosphere: Life on Earth
Life! It's everywhere on Earth; you can find living organisms from the poles to the equator, from
the bottom of the sea to several miles in the air, from freezing waters to dry valleys to undersea
thermal vents to groundwater thousands of feet below the Earth's surface. Over the last 3.7
billion years or so, living organisms on the Earth have diversified and adapted to almost every
environment imaginable. The diversity of life is truly amazing, but all living organisms do share
certain similarities. All living organisms can replicate, and the replicator molecule is DNA
But, before we begin this journey, hear this warning in the everlasting words of Father Jacobus (from
Hesse's Magister Ludi): “To study history one must know in advance that one is attempting something
fundamentally impossible, yet necessary and highly important. To study history means submitting to
chaos and nevertheless retaining faith in order and meaning. It is a very serious task, young man, and
possibly a tragic one.”
1. Name the 8 levels of classification from most general to most definite.
Domain = 3 – Bacteria are Prokaryotes (lack nucleus) Archaea, and Eukarya are US, Eukaryotes –have
Kingdom= 6 named on Monday in class.
Phylum, Class, Order, Family,
Genus = includes similar species, and is capitalized Puma.
Species= is a group of organisms, very closely related, that can mate & produce fertile offspring
2. What is Photosynthesis and cellular respiration?
In photosynthesis, solar energy is converted to chemical energy. The chemical
energy is stored in the form of glucose (sugar).
6CO2 + 6H2O + light ⇒ C6H12O6 + 6O2
C6H12O6 + 6O2 ⇒ 6CO2 + 6H2O + ATP
In plants, photosynthesis occurs within the chloroplasts. Photosynthesis consists of
two stages, the light reactions and the dark reactions. The light reactions convert
light into energy and the dark reactions use the energy and carbon dioxide to
produce sugar.
What is a Cladogram and a Dichotomous Key? (Wednesday)