Which is one of the seven characteristics that mendel observed in pea plants?
flower size
seed texture
leaf shape
stem color

The correct answer will be option-seed texture.

Explanation:

Gregor Mendel is known for his experiments on the pea plants by studying the traits of the plants. He observed the seven characters of the pea plants in his experiments:

1. Colour of seed albumen- which is yellow or green

2. The texture of ripe seed- which are smooth or wrinkled

3. Colour of flower- which is purple or white

4. Position of flowers (A) – which are axial or terminal

5. Length of the stem (T) – which are tall or dwarf

6. Form of ripe pods (I) – which are inflated or constricted

7. Colour of unripe pods (G) – which are green or yellow

Thus, the option-seed texture is the correct answer.