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

• 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?

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.

• Primary consumers -- They must eat something to get their energy.- They eat green plants or bacteria

• Secondary consumers– They eat (get their energy) from primary consumers

• Tertiary consumers– Get energy from secondary consumers

• 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.

DECOMPOSERS

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

• 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.

BUGS:Have piercing & sucking mouthparts

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