Good possible Animals SAs

Pseudocoelomate: Explain the wacky parasitic cycle of Necator americanus

(UNFINISHED) Pseudocoelomate: Explain the differences and features of the three trophi (mouth features in Rotifera)

(PRETTY FUN) Pseudocoelomate: Explain how the class Monogonata reproduce through parthenogenesis (what is meant by mictic vs amictic eggs?). Then briefly explain how Bdelloidea differs from Monogonata.

• Diploid females make amictic eggs that become more diploid females.

• In unfavourable, diploid make mictic eggfs that become haploid males

• Haploid males fertilize to make diploid eggs (hopefully with better genes to survive)

• Such diploid eggs enter diapause until conditions are more favourable (so they are called resting eggs)

• Bdelloidea differs because they never make mictic eggs or males. They only enter cryptobiosis where

(PLEASE DON’T CHOOSE THIS) (UNFINISHED) Pseudocoelomate: Explain Nematoda’s 3 types of motion. Also mention the structure of a muscle in the worm.

• Slow crawling use mainly parapodia

• longitudinal muscles are arranged into four bundles, two dorsolateral and two ventrolateral muscles

• In fast crawlinh, worms use parapodia and 2 of the longitudinal muscle bundles. For example when the dorsolat contracts, the ventrolat stretches.

• Effective parapodia stroke when the thing contracts.

(UNFINISHED) Arthropoda I: Explain the two kinds of flight in insects: Indirect flight and direct flight.

Arthropod II: Bees part a) Explain the dance of honey bees. Explain how bees determine direction and type of food source as well, but not the distance.

Once the bee finds a food source, it goes in a straight line back to the hive. Then they begin a waggle dance where they vibrate their abdomen. The bee begins the dance facing the direction of the food source with respect to the sun (the top of the hive is the direction of the sun). The d

• state that the dance appears like a figure eight

• explain what is meant by straight run

Other bees sniff its body while this happens to determine the type of food/pollen found.

Arthropod II: Bees part b) Explain how honey bees can determine distance of the food source from the dance. Explain how a bee knows how long it has traveled,

• Other bees observe the duration of the straight run to determine the distance of the food source.

• state that a round dance is performed for distances shorter than 50m.

• Julesz pattern used to trick the bees into thinking they’ve flown a longer distance. We know this because the bees do waggle dance if they had to enter a tunnel with the pattern. But they did a round dance when the food was at the entrance of the tunnel, or if the tunnel never had a Julesz pattern.

(UNFINISHED) Arthropod II: Draw the structure of sensilla. Name which sensillum is used for the senses: chemoreception, temperature, mechanoreception

(UNFINISHED) Arthropod II: What special receptors do pyrophilous insects have? Why would an insect become pyrophilous?

Echinodeermata: Tube feet structure, yes the vessels