Embryo culture methods in developmental biology and reproductive biotechnology include which of the following approaches?

Introduction / Context:
Embryo culture encompasses techniques to grow early embryos or embryonic tissues outside the organism to study development, rescue embryos, or manipulate genetics. Laboratories employ multiple formats depending on species and stage.

Given Data / Assumptions:

• Cultures can be tissue-based (organ explants) or whole-embryo systems.
• Support matrices include plasma clots and agar gels, among others.
• Objective is to sustain viability and morphogenesis.

Concept / Approach:
Plasma clot and agar provide scaffolding and localized nutrients for organ explants. Whole-embryo cultures use rolling bottles or static systems with carefully defined gas and nutrient conditions to support growth and differentiation.

Step-by-Step Solution:

Verification / Alternative check:
Protocols for rodent and avian embryos describe all three modalities, validating their use.

Why Other Options Are Wrong:

Common Pitfalls:
Thinking embryo culture is limited to one matrix; optimal choice depends on developmental stage and species.

Final Answer:
All of these.