The following are features of weeds that compete with crop plants: 1 - Scottish Highers Biology - Question 20 - 2023

Perennial weeds are characterized by having storage organs and the ability for vegetative reproduction, which allows them to survive for multiple years.

1. Storage organs: Perennial weeds often develop storage organs, such as bulbs or tubers, which help them survive adverse conditions and regrow when conditions improve.

2. Vegetative reproduction: Many perennial weeds can reproduce vegetatively, allowing them to spread efficiently and establish themselves in various areas.

3. Short life cycle: This characteristic is not typical of perennial weeds, as they generally have a longer life cycle compared to annual or biannual weeds. Therefore, it is accurate to exclude this characteristic when identifying features of perennial weeds.

Based on these insights, the correct answer is A: 1 and 2 only.