DEAD OR ALIVE?
SIZE DOES MATTER!
GO WITH THE FLOW
CELLS ALIVE!
CIRCLE OF LIFE
100
Non-living aspects of an ecosystem are called what factors?
ABIOTIC
100
calculate the surface area to volume ratio for a 2cm cube
surface area=24 volume=8 24/8 = 3:1
100
What is the term used to describe the movement of water across a semi-permeable membrane from an area high in concentration to low in concentration?
osmosis
100
What does the cell theory state?
all living things are made up of one or more cells
100
What is the word equation for photosynthesis?
carbon dioxide + water >>>>> glucose + oxygen (in the presence of sunlight and chlorophyll)
200
What is the scientific term given to the area or range in which organisms can be found in an ecosystem?
DISTRIBUTION
200
The electron microscope can view objects up to what magnification?
2 nanometres
200
Name the organelle that controls what comes in and out of an cell?
cell membrane
200
What 3 organelles do plant cells have that animal cells do not?
-cell wall -chloroplasts -large vacuole
200
What are the three main sampling techniques/methods used when conducting population studies in an ecosystem?
-transects -quadrats -capture/recapture
300
Name the Australian mammal that licks its forelimbs in the arid regions of the country and state why it does so?
kangaroo. It cools the blood vessels and therefore its body temperature in the heat of the day.
300
mitochondria have a folded internal membrane to increase what?
surface area
300
What is the name of currently accepted model of the cell membrane?
fluid-mosaic model
300
Robert Brown and Robert Hooke both played a part in contributing to our understanding of the cell. What did both scientists discover?
Robert Hooke: discovered cells and named them Robert Brown: discovered and named the nucleus
300
What is the name given to the relationship where one species benefits and the other is neither harmed or benefits?
commensalism
400
What is the name of the cell substance that turns blue/black in the presence of iodine?
starch
400
Why is it better for cells to have a larger surface area to volume ratio?
they are more efficient at transporting substances in and out of cells and tissues
400
What 2 substances make up the cell membrane?
proteins and lipid/fat molecules
400
Identify three cell organelles that CANNOT be seen with a light microscope?
-mitochondria -Golgi body -endoplasmic reticulum (rough and smooth) -ribosomes -lysosomes
400
What is the name given to the group of organisms that are responsible for recycling nutrients back into an ecosystem?
decomposers
500
First order consumers are also called what?
herbivores
500
Explain what allelopathy is?
when plants secrete a chemical into the surrounding soil to inhibit the growth of other plants growing nearby.
500
The movement of materials that requires no energy from the cell is called what?
passive transport
500
Name the 4 categories of organic substances that are found inside cells
-carbohydrates -proteins -lipids/fats -nucleic acids
500
Define the term "adaptation" and identify the three main types of adaptations.
inherited characteristics that enable an organism to succesfully survive and reproduce in an ecosystem. -structural -behavioural -physiological
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