1. Typically, the first stage in animal development after zygote formation is a solid ball of...

 

Transcribed Image Text:

1. Typically, the first stage in animal development after zygote formation is a solid ball of cells called the A) B) C) D) blastula morula gastrula planula 2. Other than Radiata, eumetazoans are A) B) C) D) ablastic (having no tissue layers) triploblastie monoblastic diploblastic 3. The eumetazoan phylum sometimes called "wheel animals" because of their feeding mechanism is Porifera A) B) C) D) Rotifera Nematoda Anthozoa 4. A class of enidarians that lacks a medusa stage is Hydrazoa Cubazoa Anthozoa Scyphozoa A) B) C) D) 5. For excretion, flatworms use nephridia flame cells osmosis A) B) C) D) regurgitation 6. The nervous system of most flatworms can be correctly described as A) B) C) D) E) a nerve net a nerve ladder a nerve chord a nerve ring lacking 7. Cnidarian digestion is internal and extracellular A) B) C) D) E) internal and intracellular internal, extracellular and intracellular external and intracellular external, extracellular and intracellular 8. The largest phylum of pseudocoelomates is Cycliophora A) B) C) D) E) Platyhelminthes Cestoda Nematoda Rotifera 1. Typically, the first stage in animal development after zygote formation is a solid ball of cells called the A) B) C) D) blastula morula gastrula planula 2. Other than Radiata, eumetazoans are A) B) C) D) ablastic (having no tissue layers) triploblastie monoblastic diploblastic 3. The eumetazoan phylum sometimes called "wheel animals" because of their feeding mechanism is Porifera A) B) C) D) Rotifera Nematoda Anthozoa 4. A class of enidarians that lacks a medusa stage is Hydrazoa Cubazoa Anthozoa Scyphozoa A) B) C) D) 5. For excretion, flatworms use nephridia flame cells osmosis A) B) C) D) regurgitation 6. The nervous system of most flatworms can be correctly described as A) B) C) D) E) a nerve net a nerve ladder a nerve chord a nerve ring lacking 7. Cnidarian digestion is internal and extracellular A) B) C) D) E) internal and intracellular internal, extracellular and intracellular external and intracellular external, extracellular and intracellular 8. The largest phylum of pseudocoelomates is Cycliophora A) B) C) D) E) Platyhelminthes Cestoda Nematoda Rotifera

Answer rating: 100% (QA)

1 Correct answer is A Blastula Explanation A zygote undergoes rapid cell divisions to form a spheric... View the full answer