TTU Biology 1402 Exam 3 Questions & Answers (Grade A+).docx

TTU Biology 1402 Exam 3 Questions &
Answers (Grade A+)
invertebrate -
correct answer ✅Animal that does not have a backbone
(8 phylum’s)


Phylum Porifera -
correct answer ✅(sponges)- filter feeders
-sessile
-pores
-two cell types (Amoebocyte, Choanocyte)


sessile -
correct answer ✅not mobile (stay in one place for whole life)


Phylum Cnidaria -
correct answer ✅(jellyfish, hydra, polyps)
- tentacles with stinging cells (Nematocysts=harpoons)
harpoons contain paralytic toxins


Phylum Platyhelminthes -
correct answer ✅(flatworms, tapeworm)
- light sensers,

, TTU Biology 1402 Exam 3 Questions &
Answers (Grade A+)
-bilaterally symmetrical,
-have one opening (mouth & anus)
-have both sexual organs (ovaries & testis)


Bilaterally symmertrical -
correct answer ✅Symmetrical on both sides of the body


Phylum Nematodes -
correct answer ✅(roundworms)- most parasites that carry
diseases


Phylum Mollusca -
correct answer ✅(snail, octopus, squid)
-mantle, radula (teeth)
-foot (grips surfaces, also tentacles)


Radula -
correct answer ✅Mollusks version of teeth


foot -
correct answer ✅What mollusks use to grip surfaces (tentacles)