Embryonic body form stage is characterised by

Options

A. Basic body plan emerging
B. Miniature adult features
C. Stage of development resembling other species
D. Tissues not fully formed

Explanation

### Step-by-Step Text Solution:

1. **Understanding the Embryonic Body Form Stage**: The embryonic body form stage is a crucial phase in the development of an organism. It is characterized by the establishment of a basic body plan and the emergence of features that resemble the adult form of the species.

2. **Basic Body Plan**: During this stage, the fundamental layout of the organism's body is formed. This includes the arrangement of tissues and organs, which will further develop as the embryo matures.

3. **Emerging Features**: The embryonic body starts to show miniature versions of adult features. This means that while the tissues are not fully formed, the basic outlines of structures that will develop into organs and limbs begin to appear.

4. **Resemblance to Adult Species**: The embryonic stage often reflects characteristics of the adult form, indicating a connection to ancestral species. This resemblance is a key aspect of developmental biology, where the development of an organism (ontogeny) reflects its evolutionary history (phylogeny).

5. **Tissues Not Fully Formed**: It is important to note that while the embryonic body shows these features, the tissues and organs are still in the process of formation and are not fully developed at this stage.

6. **Conclusion**: Based on these characteristics, the embryonic body form stage is characterized by a basic body plan, emerging miniature adult features, and a resemblance to the adult species, while the tissues are still developing.