Transcript of BIO Ch 2 - Weebly
BIO Ch 2.1 Biology Chapter 2 Ecology
Chapter 2 Section 1
I. Ecology is the scientific study
of interactions among organisms
and their environment.
A. Biosphere—portion of the
earth that supports life
(atmosphere to bottom of oceans)
B. Biotic factors—the living
organisms that inhabit an environment.
C. Abiotic factors—the nonliving
parts of the environment.
Ex. Air currents, temperature,
moisture, light, and soil
Biotic/Abiotic Worksheet
1. From the following story, complete the listing below:
One day, Lizzie the lizard was crawling along a rock near her home. As she crawled along she saw a group of 5 crickets. Her stomach growled as it was close to her
lunch time and she jumped out and caught one in her mouth. Crunching the exoskeleton of the cricket, she rolled her eyes up as it tasted so good to her. As she was busy eating
one cricket, the others leaped away and hid under a bush that was growing under the two elm trees nearby. Lizzy finished her cricket and thought, “Yum” and went to find the
others. When she snuck up to the bush, she found not only the crickets were hiding there but a whole group of rolypoly’s and a mouse looking for lunch too. A mouse is much
bigger than Lizzie, so she ran back home.
Individual’s in the story: ____________, _____________, _____________
Populations in the story: ___________________, ____________________________, ___________________________________
List the community: __________________________________________________________________________________________________________
2. Place the following items in the correct box: Rock, worm, tree, rain, grass, lizard, sun, lightning, bush, mouse, temperature
ABIOTIC .
BIOTIC .
BIO Ch 2.1
II. Levels of Organization in Ecology
A. Organisms—Ecologists may
study the interactions of an
individual organism. They may
study its organisms, interactions
with like species or interactions
with different species.
Levels of Organization for Organisms.mht
B. Populationgroup of
organisms of one species living in
the same place at the same time
that interbreed. C. Community—collection of
interacting populations.
1. Nichea species function in a
community (includes all
relationships with the
environment—living and nonliving
2. Habitat—place where an
organism lives.
D. Ecosystems interactions
between populations in a
community and the abiotic factors
Drag the levels of organization in order
from largest to smallest category.
Organism
Biosphere
Molecules
Ecosystem
Community
Tissue
http://app.discoveryeducation.com/core:player/view/assetGuid/0B666D6513A046AD9914
4C7BA106DA46
ECOLOGY: ORGANISMS IN THEIR ENVIRONMENTS from the series Biology:
The Science of Life
Directions: Answer the following either true or false.
1. True or False? The living things in an ecosystem make up its
abiotic factors.
2. True or False? Different populations are composed of different
species of organisms.
3. True or False? A niche is the particular place in which an
organism lives.
4. True or False? Food webs are made up of interconnected food
chains.
5. True or False? In food chains, many thirdorder consumers are
needed to support only a few food producers.
Levels of Organization
All living things have a structure that is based on specific
organization of materials. While science discovers new levels all
of the time, the life sciences tend to draw some distinctive lines
of demarkation.
In Anatomy, you are responsible for knowing the levels of
organization from the atom to the organism.
Level of organization
Explanation
Example
atom
atom is the smallest particle that maintains its physical and
chemical properties; note that particles smaller than the atom have
been discovered, but they do not maintain these properties
oxygen, nitrogen, gold
water, carbon dioxide
macromolecule
when two or more molecules are bonded together to form large
(gigantic!) molecules
proteins, lipids, carbohydrates
organelles
several macromolecules bonded together form these building blocks
of a cell
mitochondria, nucleus, golgi apparatus
Below this level begins what scientists consider living or
alive
cells
the smallest unit of life, a cell is a collection of organelles
functioning together
bacteria, animal, plant
tissues
a collections of cells working together to perform a specific
job
epithelial, connective
organs
two or more types of tissues that work together to complete a
specific task
heart, stomach, brain
organ systems (systems)
several organs working in unison to achieve a common goal
digestive, cardiovascular, respiratory
human, dog, tree
population
groups of individual organisms of the same species working together
to achieve a common goal
bees, ants
all of the human species
ecosystem
wetlands, oak forest
desert, trundra, rainforest
the earth's living occupants
Levels of Organization
All living things have a structure that is based on specific
organization of materials. While science discovers new levels all
of the time, the life sciences tend to draw some distinctive lines
of demarkation.
In Anatomy, you are responsible for knowing the levels of
organization from the atom to the organism.
Level of organization
Explanation
Example
atom
atom is the smallest particle that maintains its physical and
chemical properties; note that particles smaller than the atom have
been discovered, but they do not maintain these properties
oxygen, nitrogen, gold
water, carbon dioxide
macromolecule
when two or more molecules are bonded together to form large
(gigantic!) molecules
proteins, lipids, carbohydrates
organelles
several macromolecules bonded together form these building blocks
of a cell
mitochondria, nucleus, golgi apparatus
Below this level begins what scientists consider living or
alive
cells
the smallest unit of life, a cell is a collection of organelles
functioning together
bacteria, animal, plant
tissues
a collections of cells working together to perform a specific
job
epithelial, connective
organs
two or more types of tissues that work together to complete a
specific task
heart, stomach, brain
organ systems (systems)
several organs working in unison to achieve a common goal
digestive, cardiovascular, respiratory
human, dog, tree
population
groups of individual organisms of the same species working together
to achieve a common goal
bees, ants
all of the human species
ecosystem
wetlands, oak forest
desert, trundra, rainforest
the earth's living occupants