Question

QUESTION 1 Animal as diverse as flatworms and human share all of the following traits except a. coelom b.mesoderm c. ectoderm d. endoderm e zygote cleavage QUESTION 2 A deuterostome is: d. all of theses answers are correct an organism with a blastopore that develops into the anus, with the second opening developing into the mouth. animal with a body cavity completely lined with mesodermal tissue an organism with a blastopore that develops into the mouth of protostomes, with the second opening developing into the anus e. animal with a body cavity located between the mesoderm and endoderm

Answer 1

1. The correct answer is option a i.e. coelom. The fatworms or platyhelminthes are the phylum in the animal kingdom without a body cavity i.e coelom. They are tribloblastic i.e have all the three tissue layers (ectoderm, mesoderm and endoderm).

2. The correct answer is option b. A Deuterostome is an organism with a blastophore that develops into the anus, with the second opening developing into the mouth. On the other hand, protostomes are the organisms with a blastophore that develops into the mouth, with the second opening developing into the anus.