Biologists traditionally classified animal diversity in terms of developmental and morphological features of animal body plans. The main features included body symmetry, number of germ layers and specific characteristics during embryonic development. The embryo becomes a multicellular embryo by a process called cleavage during the early stage of embryonic development. Rapid cell divisions produce a hollow sphere of cells called a blastula. The growing embryo then develops different layers of cells called germ layers.

Question

Want to see the full answer?

Answer 1

Question

Chapter 33, Problem 6TY

Summary Introduction

Introduction: Biologists traditionally classified animal diversity in terms of developmental and morphological features of animal body plans. The main features included body symmetry, number of germ layers and specific characteristics during embryonic development. The embryo becomes a multicellular embryo by a process called cleavage during the early stage of embryonic development. Rapid cell divisions produce a hollow sphere of cells called a blastula. The growing embryo then develops different layers of cells called germ layers.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Each of the following is a critical difference between protostomes and deuterostomes except A. deuterostomes have bilateral symmetry B. the blastopore becomes the anus in deuterostomes C. the blastopore becomes the mouth in protostomes D. protostomes have radial symmetry

A deuterostome has what type of cleavage Group of answer choices A. spiral, indeterminate at 8 cells B, radial, indeterminate at 8 cells C. spiral, determinate at 8 cells D. radial, determinate at 8 cells

Which of the following statements is correct for all amniotes? A. They have internal fertilization, three embryonic membraes, are independent of water for reprodction B. They have external fertilization if they live in water, have alantoic membranes to carry oxygenated blood to the embryo, and lack a shell on their eggs. C. They lay eggs covered with a shell, are viviporous and have a marsupium D. They have an embryonic chorionic membrane that becomes part of the placenta, has cells with Golgi bodies,and a yolk sac E. They have three embryonic membranes, have notochords, and are ovoviviparous.