Answer: A alleles
Explanation: this is because they are alternate genes that can make up different traits .
They are saying that every theory can eventually be changed a bit due to further research. It does not mean the theory is bad, just that it can become better.
We need the options to answer this
The correct answer is option (A) trichomes.
Trichomes are the fine extensions from the epidermal surfaces covering the plant body. They are the result of epidermal cell division. They can be unicellular, multicellular and even glandular. They are characteristically present on the epidermal surfaces of leaves and roots. They reflect the solar radiation and help in mainitaining the internal temperature and reducing water loss. In roots, they absorb water and minerals and in leaves, they reduce water loss, lower the plant temperature. Plants may use trichomes to detect herbivore attacks as a defense mechanism.
