Biol 1BL Practical 3 Review

• what animal and stage of embryonic development is this?

  sea star, early cleavage

  
• what animal and stage of embryonic development is this?

  sea star, blastulation

  
• what animal and stage of embryonic development is this?

  sea star, early gastrulation

  
• what animal and stage of embryonic development is this?

  sea star, late gastrulation

  
• what animal and stage of embryonic development is this?

  frog, cleavage

  
• what animal and stage of embryonic development is this?

  frog, blastulation

  
• what animal and stage of embryonic development is this?

  frog, gastrulation

  
• What does a choanocyte do and what animal is it found in?

  sponge, directs water through the sponge to trap and ingest food via phagocytosis

  
• What does a porocyte do and what animal is it found in?

  sponge, controls water flow through ostia

  
• What is a spongocoel and what animal is it found in?

  central cavity in sponges

  
• What is an osculum and what animal is it found in?

  opening for water expulsion in sponges

  
• What are these, what do they do, and where are they found?

  spicules, skeletal spikes of silica that reinforce the walls in sponges

  
• what are gemmules, what do they do?

  a form of asexual budding in freshwater sponges
• what are the two body plans in cnidaria?

  medusa and polyp

  
• what is a lophophore

  tentacles around mouth of sessile larva

  
• what is a trochophore

  free swimming larva with bands of cilia around the mouth

  
• What is this the cross section of?

  flatworm

  
• What does number 2 point to?

  auricles

  
• what does number 1 point to?

  eyespots

  
• what does number 3 point to?

  mouth

  
• what does number 4 point to?

  pharynx

  
• what does the radula do and what animals use it

  it's a horny-toothed organ in the mouth, scrapes food (algae) from rocks used by polyplacophora (chiton)

  
• which does number 2 point to?

  foot

  
• what does 7 point to?

  shell

  
• what does 6 point to?

  mantle

  
• what does 5 point to?

  the snail foot

  
• what animal is this and what does number 1 point to?

  clam, shell

  
• what does number 6 point to?

  the clam gills

  
• what does number 10 point to?

  the labial palp

  
• what does 12 point to?

  the clam stomach

  
• what does 3 point to?

  the anus

  
• what number points to the foot?

  6

  
• what number points to the mantle?

  5

  
• what animal is this and what phylum does it fall into?

  Nereis, annelids

  
• what animal is this and what does number one point to?

  earth worm, the hearts

  
• what phylum is this and what does number two point to?


  annelids, the crop

  
• what is the clitellum and what does it do?

  it's a series of swollen segments at the back third of the body, mating worms attach at their clitella and exchange sperm

  
• what does number 4 point to and what does it do?

  the intestine, absorbs nutrients in worms

  
• what is number 3 pointing to and what does it do?

  the gizzard, grinds food down into smaller parts with the help of sand in the soil in worms

  
• what animal is this cross section found in?

  earth worms