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:
<span>a tide just after the first or third quarters of the moon when there is least difference between high and low water.</span>
Homeostasis is when your body become balanced like temperature and fluid balance
Answer: Voluntary movements are movements that are under our concious control; involuntary movements are movements that are not.
Example of Voluntary: Playing piano
Example of Involuntary: Heart beating
Answer:
4
Explanation:
How do (sensory) receptors send messages to the brain?
Via (sensory) neurons
