The correct answer here is "cell membrane". Generally it makes sure that nothing enters or leaves the cell, except by its highly guarded "gates", such as ion channels, that let some particles through - but they're very picky about whom to let in!
Answer:
Rock B has a fine grainy texture and small crystals
Explanation:
1. still hasn't turned into sedimentary rock, or metamorphic. Its most likely gonna be igneous and Igneous rocks have grainy texture and small crystals since its still developing
Answer:
Question 1
B
Question 2
A
Question 3
i don't know this answer, sorry
Question 4
C