In organisms, shape of foetus is determined by
(a) Organogenesis
(b) Blastula
(c) Morphogenesis
(d) Reproduction

Options

A. Organogenesis
B. Blastula
C. Morphogenesis
D. Reproduction.

Answer

To determine the shape of the fetus in organisms, we need to analyze the given options:

1. **Organogenesis (Option A)**: This is the process that leads to the formation of organs in the developing embryo. While organogenesis is crucial for the development of various organs, it does not specifically dictate the overall shape of the fetus. Therefore, this option is not correct.

2. **Blastula (Option B)**: The blastula is an early stage in embryonic development that follows the morula stage. It is a hollow sphere of cells that forms after the zygote undergoes cleavage. Although the blastula is important for implantation and further development, it does not determine the shape of the fetus. Thus, this option is also incorrect.

3. **Morphogenesis (Option C)**: This is the biological process that causes an organism to develop its shape. Morphogenesis involves the organization and spatial distribution of cells during development, which directly influences the overall form and structure of the fetus. Therefore, this option is correct.

4. **Reproduction (Option D)**: Reproduction refers to the biological process through which new organisms are produced. While reproduction is essential for the continuation of species, it does not specifically relate to the shape of the fetus. Hence, this option is incorrect.

Based on the analysis, the correct answer is **(c) Morphogenesis**.