Im not sure how to awnser this, whats the question?
1827 is when Oxford discovers the small particles
Answer:
A) Cytoplasm
B) Chloroplast
C) Plasma membrane
D) Cell membrane
E) Smooth endoplasmic reticulum & Rough endoplasmic reticulum
F) Cell wall
Explanation:
Look at the picture below
The answer would be “D,” as gravity is the force that keep all objects on Earth’s surface.