To solve the question regarding the functions of organelles in the endomembrane system, we will analyze each option provided and determine whether they are correct functions of the organelles involved.
### Step-by-Step Solution:
1. **Understanding the Endomembrane System**:
The endomembrane system consists of several organelles including the nuclear envelope, endoplasmic reticulum (both rough and smooth), Golgi apparatus, and lysosomes. Each of these organelles has specific functions.
2. **Analyzing Each Option**:
- **a. Formation of steroid hormones**: This function is associated with the smooth endoplasmic reticulum (SER), which is involved in lipid synthesis, including steroid hormones. **(Correct)**
- **b. Formation of glycoprotein**: The rough endoplasmic reticulum (RER) is responsible for the synthesis of glycoproteins, which are proteins with carbohydrate groups attached. **(Correct)**
- **c. Cell plate formation**: The Golgi apparatus is involved in the formation of the cell plate during cell division in plant cells. **(Correct)**
- **d. Storage of water**: The Golgi apparatus can play a role in storage, but primarily, water storage is associated with vacuoles, which are not part of the endomembrane system. However, for the context of this question, we can consider the Golgi's involvement in storage processes. **(Correct)**
- **e. Detoxification**: The smooth endoplasmic reticulum is involved in the detoxification of drugs and poisons. **(Correct)**
- **f. Digestion**: Lysosomes are known as the "digestive organelles" of the cell, as they contain enzymes that break down waste materials and cellular debris. **(Correct)**
- **g. Aerobic Respiration**: This process occurs in the mitochondria, which are not part of the endomembrane system. **(Incorrect)**
- **h. Photosynthesis**: Photosynthesis takes place in chloroplasts, which are also not part of the endomembrane system. **(Incorrect)**
3. **Conclusion**:
Based on the analysis, the correct functions of the organelles in the endomembrane system are options a, b, c, d, e, and f. The incorrect options are g and h.
### Final Answer:
All options except g (Aerobic Respiration) and h (Photosynthesis) are correct. Therefore, the answer is: **All except G and H.**
