Answer Key to Study guide for Term 3 EOTT
1. Organ System
2. The example of the Peppered Moth.
3. Carbon dioxide, water and energy.
4.
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50% black and 50% brown
5. Domain, Kingdom, Phylum, Class, Order Family, Genus, Species.
6. Asexual reproduction.
7. Muscular System and Skeletal System.
8. Chloroplasts are found in plant cells. They trap sunlight to make food.
9. Nucleus – Control center of the cell
Ribosome – Makes proteins
Cytoplasm – jelly like substance that houses all organelles.
10.Living things are organized.
Living things respond to stimuli.
Living things use energy.
Living things reproduce.
Living things grow and develop.
11.Prokaryotic cells do not have membrane bound organelles. They do not
have nucleus. Eukaryotic cells have nucleus and membrane bound
organelles.
12.Biotic factors are living or once living factors in an ecosystem. Abiotic
factors are nonliving factors in an ecosystem.
13.Producers are organisms that can make their own food. Consumers are
organisms that depend on other organisms for food.
14.That shows how energy is transferred through a food chain.
15.Dichotomous key is a tool used to classify, identify and name living
organisms.
16.Mutualism – a relationship in which both organisms are benefitted.
Commensalism – a relationship in which one organism is benefitted and
the other is not affected.
Parasitism – a relationship in which one organism is benefitted and the
other is harmed.
17.Symbiosis.
18.Habitat is where an organism lives.
19.Any factor that limits the growth of a population is a limiting factor.
Sunlight and oxygen are limiting factors in an aquatic ecosystem.
20.Population size may change due to births, deaths and migration.
21.Domain, Kingdom, Phylum, Class, Order Family, Genus, Species.
22.False.
23.A food chain shows how organisms eat and are being eaten. Food web
shows all the feeding relationships in an ecosystem.
24.Grass  Deer  Lion
Grass is the producer.
Deer is the primary consumer (first level consumer/herbivore)
Lion is the secondary consumer (second level consumer/carnivore)
If any link dies out the other links will not be able to survive as they will
eventually die due to starvation.
25.Decomposers decompose the dead organisms and release the nutrients
back to the soil. So that these nutrients can be taken up by the plants to
make food.
26.The population of the lynx depend on the population of the rabbit. As the
number of the rabbits increase the lynx population increases. Eventually
the rabbit population decreases and this cannot support the lynx
population. Thus the number of the lynx decreases.