Chapter 24, Problem 9A

To write: Interpretation of the statement by Hans Spemann, a biologist who studied embryonic development

Summary Introduction

Introduction:All animal cells, excluding sponges, are divided into structural and functional units which are called tissue. Tissue is a collection of cells specialized in performing a particular purpose.

Explanation of Solution

The process of an animal's creation from an egg has perhaps been the greatest source of mystery in science history. Developmental scientists are seeking to understand how this surprising sequence of occurrences happens. Any embryonic cell may become any organ in the developed body.

Conclusion

Thus, it concludes thatthis statement interprets that all animals are developed from egg.