Biology Lab Practical 3 Quizzes & Answers With Complete Solutions Graded A+

Biology Lab Practical 3 Quizzes & Answers With
Complete Solutions Graded A+
QUESTIONS AND ANSWERS
What are nematocysts? What clade has them?. ANSWER -Stinging Cells. Cnidarians
including jellyfish.




What are characteristics of sponges? What phylum are they in?. ANSWER --
Asymmetrical, no germ layers

- lack true tissues

- sessile, filter feeders

- Have spicules and a spongin skeleton.

Phylum Porifera




What are the three germ layers?. ANSWER -Ectoderm, mesoderm, and endoderm.




What are Characteristics of Cnidarians?. ANSWER -- Radial symmetry: Have two
germ layers: ectoderm and endoderm

- Have cnidocytes with nematocysts

- Have two body plans: medusa (Sexual reproduction) and polyp (Asexual
reproduction)




What are the classes of Cnidarians?. ANSWER -1. Hydrozoa

2. Anthozoa

3. Cubozoa

, 4. Scyphozoa




What are characteristics of Platyhelminthes?. ANSWER -- Bilateral symmetry: have
three germ layers; pseudocoelomate

- Protostomes

- No segmentation

- First cephalization with eyespots and a definite head




What classes are in the Platyhelminthes?. ANSWER -1. Turbellaira

2. Trematoda

3. Cestoda




What are the two body plan developments?. ANSWER -Protostomes: blastopore
develops into the mouth first. Spiral and determinant

Deuterostomes: blastopore develops into the anus first. Radial and indeterminant




What are characteristics of Lophotrochozoans?. ANSWER -- Bilateral symmetry:
Have three germ layers

- All protostomes

- Have lophophores

- Have Trocozoa




What are classes of Lophotrochozoans?. ANSWER -1. Rotifers

2. Platyhelminthes