Will it be possible to obtain a complete animal from an animal cell like plants? If yes, what would be the advantages and challenges of this development?
Yes, it might be possible to obtain a complete animal from an animal cell. Plant cells have demonstrated totipotency—the ability of mature cells to dedifferentiate, divide, and redifferentiate into a complete organism. F.C. Steward proved this using carrot phloem cells grown in a nutrient medium containing simple sugars and hormones under appropriate conditions. Since this ability is similar to that of a zygote to develop into an entire organism, animal cells might potentially exhibit similar totipotency.
If achieved, advantages could parallel those in plant tissue culture, which has contributed to crop improvement and brought significant progress in modern agriculture.
However, challenges would be significant. Steward's experiments showed that growth depends on different combinations of nutrients and other factors like light and air. Finding the correct conditions, nutrients, and growth chemicals that enable animal cells to properly dedifferentiate and redifferentiate would be complex.
Explanation
The textbook introduces totipotency through F.C. Steward's experiment with carrot phloem cells, showing that plant cells can regenerate into complete plants under appropriate conditions. The text notes this is 'similar to the ability of a zygote to divide and differentiate into an entire organism,' suggesting theoretical possibility for animal cells. The advantages can be inferred from Sipra Guha Mukherjee's work showing plant tissue culture contributed to 'crop improvement' and 'progress in modern agriculture.' The challenges are implied from Steward's experiments showing that different combinations of nutrients and factors (light, air) affect growth outcomes, indicating the complexity of finding right conditions.
Solution Steps
Step 1: Explain totipotency as demonstrated in plant cells by F.C. Steward
Step 2: Draw parallel to zygote's ability, suggesting theoretical possibility for animal cells
Step 3: List advantages based on plant tissue culture applications mentioned in context
Step 4: Identify challenges based on the complexity of conditions required as shown in Steward's experiments