Answer:
The main difference between these two classes is that: Pteridophytes are vascular plants but they do not produce flowers and seeds which mean their source of reproduction is unknown or hidden. Examples are ferns, horsetails and lycophytes. On the contrary, Spermatophytes as the name indicates, are seed bearing plants.
Explanation:
Tundra ecosystem is cold and sunlight is short. Plants need sunglight and warmth in order to grow, thus plants in tundra are shorter and cloers to the ground since the ground is warmer than the air
Answer:
C. Genetic differences
<em>I hope this helps you</em>
<em>:)</em>
