Milkweed bugs – Investigation 1
• Tony's creepy crawly zoo – milkweed plant
info
What do organisms
need in order to survive?
The Big 4 needed for survival
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Water
Shelter/space
Temperature
Nutrients or food
• (Many organisms need light or they need
something else that needs light – Why?)
Sustaining Life
• Each type of organism needs certain kinds and
quantities of nutrients to survive (to live).
• If only one key nutrient is missing, it will die.
• Even if one key nutrient is minimal (low), it’s
growth can be stunted.
Food “Web”
• What do you know?
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Food “chain” or Web
Producers –
– Make their own food
– They get their energy from the sun (and simple chemicals)
– Made up mostly of___________________ and some bacteria.
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Primary consumers -
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They must eat something to get their energy.
They eat green plants or bacteria
Secondary consumers
– They eat (get their energy) from primary consumers
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Tertiary consumers
– Get energy from secondary consumers
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Decomposers – Mainly bacteria and fungi (they break down complex chemicals into simpler ones that can be
used again by the producers)
NOTE: an organism can follow into more than one level.
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Important Vocab
• Phototroph
– Organisms that can produce their own energy and
therefore do not need to “eat”. (usually from the
sun, H2O, and CO2)
• Heterotroph
- Organisms that must get their energy
through eating other organisms (or their
remains).
Where does the energy go?
Even scientists make mistakes, can you
find the one made here?
An ocean top, vs deep thermal vent (on the bottom) pyramid comparison
Classification
http://classificationperiodfive.weebly.com/
Kingdom is most inclusive –
species is most specific
The order of scientific classification –
for living things
• Did King Philip come over for good spaghetti?
• Domain, kingdom, phylum, class, order, family,
genus, species
• Humans are
Classified as such:
Arthropods (phylum)
- All have exoskeletons – skeletons on outside.
- All have bilateral symmetry (this means it can
be divided in half and look like a mirror image)
Exoskeletons are made of a hard protein called
chitin.
2 classes and a subphylum
(of Arthropod)
• Insecta – includes all insects and bugs. Insect
means segmented. Example: darkling beetles.
• Arachnida – includes spiders.
• (subphylum it has 2 classes within crustacea)
• Crustacea – includes lobsters, shrimp, (including
brine shrimp). Isopods such as pill “bugs”, and
sow “bugs”.
• About Arthropods
• classes of Arthropoda
Body parts
• Insects
– 3 body parts (head, thorax, abdomen)
– 6 legs
• Arachnida
– 2 body parts (head and thorax are combined, and
abdomen)
– 8 legs
• INSECTS
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BUGS:
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Have
piercing & •
sucking
mouthparts
About 1 million identified
They think about 3million total.
All have exoskeletons
3 body parts
6 legs
MOST have 2 pairs of wings
MOST have 2 eyes and 2 antennae
Largest group is beetles.
4 Instars (missing one) plus adult
Milkweed bug and 2 exoskeletons
Complete vs incomplete
metamorphosis
Milkweed bug
• Incomplete metamorphosis – a process of
gradual maturing of an insect (egg, nymphal
stages or instars, and adult).
– Egg
– Nymph (5 instars)
– Adult