I believe the answer is A
The typical number of parathyroid gland is four
Answer:
The roots as they absorb water and nutrients.
Answer:
A - Chloroplast (although the arrow looks like it is pointed at the Thylakoid membrane)
B - Vacuole
C - Cell wall
D - Smooth Endoplasmic Reticulum (top) and Rough Endoplasmic Reticulum (down below)
Explanation: