Question

the purpose of this pretest is to assess your mastery of the standards covered in this module. exhibit mastery at a level of 60% or higher, you will be permitted to proceed to the next modu if, however, you score below 60%, you will need to proceed through the items in this module to question 11 what causes differential growth in stem plant cells? auxins starches elongation thigmotrop

Explanation:

Auxins are plant hormones that regulate cell elongation and cause differential growth in stem plant cells (e.g., in phototropism/geotropism). Starches are energy storage, elongation is a growth result, and thigmotropism is a response to touch (not the cause of differential growth at the cellular level for stems' directional growth).

Answer:

A. auxins