All actively growing broadleaves have what features at the end of each stem and in each leaf axil?

The correct answer highlights that all actively growing broadleaf plants possess exposed growing points at the end of each stem and in each leaf axil. This characteristic is crucial for the plant’s growth and development. The exposed growing points refer to the areas where new growth occurs, such as new leaves or branches. These growing points enable the plant to continue expanding in size and developing new foliage, which is essential for photosynthesis and overall health.

The presence of exposed growing points indicates the plant’s active growth phase, allowing it to respond quickly to environmental factors, such as sunlight, water availability, and nutrient levels. This feature is particularly important in broadleaf plants, as their growth patterns significantly influence their ability to compete for resources in their environment.

In contrast, the other options do not accurately represent the key characteristics of actively growing broadleaf plants. Stubby roots may be found in various plant types but do not specifically relate to broadleaf growth characteristics. Developing seeds are a sign of reproduction, typically occurring later in the plant’s life cycle, not at the points of active growth. Thorns might be present in some plant species as a defense mechanism but are not a universal feature of broadleaves and do not pertain to their growth points.