Find the Indicated Sum $a _ { 1 } = - 5 , r = 3 ; \text { find } s _ { 4 }$

question 71

Multiple Choice

Find the indicated sum.
- $a _ { 1 } = - 5 , r = 3 ; \text { find } s _ { 4 }$

• A)200
• B)-65
• C)- 200
• D)- 40

Understand mechanisms and outcomes of specific developmental defects.

Understand the basic concepts and roles of embryonic development stages.

Describe the process and significance of gastrulation in different species.

Explain the formation and function of the placenta.

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