Owl pellet dissection
Follow each bar on the left to answer the following questions
1. Owls eat their food _whole_. The owl _regurgitates_ the harder material along with the
Take Test: Chapter 17 Quiz
The ancestors of land plants were probably _ that lived in _.
green algae similar to charophytes; coastal marshes or lake fringes
cyanobacteria; moist soil crust communities
cyanobacteria; coastal marshes or lake frin
Take Test: Chapter 16 Quiz
Individual prokaryote cells are about _ eukaryote cells; collectively, all prokaryote cells
on Earth _.
one-tenth as big as; weigh about one-tenth the total mass of eukaryote cells
10 times bigger than; weigh about 10
Virtual Frog Dissection
Beginning with the introduction, answer the following questions using the virtual frog
dissection. Follow the prompts in the box on the left. Progress slides by clickin
Enzymes are biological catalysts. There are about
40,000 different enzymes in human cells, each
controlling a different chemical reaction. They
increase the rate of reactions by a factor of between
106 to 1012 times, allowing the chemic
An overview of photosynthesis
The light reactions: converting solar energy to chemical energy
The Calvin Cycle: converting CO2 to sugars
Photosynthesis reviewed and extended
Photosynthesis, solar radiation, and eart
Photorespiration, C4,and CAM
Why is the former
Not as efficient as C3
C4 and CAM Plants Have Special Adaptations That Save Water
Microscope and cells
Who first discovered cells?
Credited with making the
first microscopes (1660), and
who coined the term cell.
Antonie van Leeuwenhoek
Credited with perfecting
Most cells are
Organisms Must Use Energy
When you do anything,
you are using energy.
Where does this energy
Your muscles use ATP in
order to do their work.
You break down sugars to
Photosynthesis and respiration give
Free Energy and ATP
All life is based on energy.
When you eat food:
You get energy and nutrients.
Where does this energy come from?
How will you get the energy?
How will you use your energy?
Can you die of starvation wit
How do reactions occur?
Enzymes are molecules that help reactions
Enzymes lower the activation of
activation needed to initiate the reaction.
This is the amount of energy needed to start
Catalysts for specific chemi
Take Test: Chapter 18 Quiz
have cell walls made of chitin.
obtain food by absorption.
Typical animal embryos have _, or external cell layer, and _, which lines the