Some cells, instead of leaving the cell cycle to die,
divide repeatedly and excessively, forming a clump
of cells called a tumour.
Cancer is a disease that eventually disrupts the
body functions, whereas a tumour is a mass of cells
with no appare
Human Organ Systems
Complete the different activities around the
Human Organ Systems
Choose one of the following systems and copy it beside its description and function.
Description and Functio
Model of a Human Finger
Your hands are a pair of organs that help you physically manipulate your environment using
both fine and gross motor movements. They are comprised of a palm and 5 digits, and
contain 27 bones. Your fingertips have an extreme
1) Carries oxygen from lungs to cells
2) Carries carbon dioxide from cells to lungs
3) Carries nutrients from intestines to cells
4) Carries cellular wastes from cells to kidneys
The 3 main parts of The
Lesson 6: Organ Systems
For multicellular organisms to function, many of their daily
tasks require multiple tissue types and organs, working
together. Such an arrangement is called an ORGAN
SYSTEM. Animals have many different organ systems, all
TRAClNG THE PATH OF AN 02 MOLECULE
1. Cut out each of the individual squares below.
2. Place each square in order from:
W a) inhalation of air to. the lungs (respiratory system)
b) through the heart(Circulatory system)
c) and back to th
Populations and Population Dynamics
- Populations refer to the total number of individuals of a
given species in a given area. If we consider humans,
for example, our population is growing exponentially!
(See fig. 1, p. 38).
In general, population size is
Lecture Outline: Biomes in Canada
Biome: A collection of ecosystems that are similar to, or are
related to each otherBusually in the type of plants they
Canada has five major biomes (Tundra, Boreal Forest,
Temperate Deciduous Forest, Grassland, a
Pesticides and Bioamplification:
- Whenever a species (plant or animal) gets out of
control in a managed ecosystem, we often will use
chemicals to kill off that species.
Herbicides are chemicals designed to kill weeds. (A
weed is simply some plant that we
Grade 9 Science BiologyInvasive Species
Unit Project: Poster/Presentation
Invasive species (sometimes called Exotic Species) are those species which are accidentally or
deliberately introduced into an ecosystem. These species tend to have no natural enemi
Aquatic Ecosystems and Eutrophication
Aquatic ecosystems are those which are found in lakes and
oceans. Like most land-based (Terrestrial) ecosystems,
they have producers, consumers, and decomposers.
Fig. 1a typical lake ecosystem:
One key factor for aqua
Loss of species: Extinction!
When environmental factors are especially severe, plants
and animals will die out. Some individuals of the species
may exist elsewhere on earth, where the factors are less
severe. If all individuals of a species are wiped out,
Factors Affecting Ecosystems:
- When we consider what factors limit how big a
population a given environment can support, we
realize that there are 2 types of factors:
Abiotic (Non-living): These are factors present in the
environment: Climate, how much r
Grade 10 Science: Ecology
Ecology: The study of the interaction of
living things with each other, and their
Ecosystem: A series of producers,
consumers, and decomposers in a particular
environment or location. An ecosystem
Matter Cycles: Water, Carbon, and Nitrogen
- As we know, abiotic factors impose limits on
ecosystems. Most often, the lack of a given nutrient will
either stop or slow the growth of plants.
- Rather than getting a fresh supply of these vital
Energy Flow in Ecosystems:
1. The Sun: Source of all life
All life on earth ultimately depends on the sun. The sun
provides the light energy which powers photosynthesis, the
source of energy used by plants.
Photosynthesis: The process by which green plant
Food Webs and Chains
In general, food energy in ecosystems flows from plants
(producers) to herbivores to carnivores. Of course,
ultimately, everything diesand is broken down by
decomposers (bacteria, small insects, fungi).
Depending on the complexity of
First Name_ Date_
All questions are worth 1 point.
Multiple Choice Questions. Choose the letter that best answers or completes the question.
1. The ability to form and maintain meaningful relationships are components o
This exam consists of 80 questions worth 1.25 pts. each for a total of 100pts. You CAN write on this exam. If you choose to
write on the exam please put a W in pencil at the top of this page. You have the entire class period to com