Which organelle is represented by a network of membranes involved in the production of proteins? a. chloroplast b. nucleus c. mitochondrion d. endoplasmic reticulum?

The answer is d. endoplasmic reticulum

Endoplasmic reticulum is an organelle that has role in protein synthesis. Chloroplast  is the organelle in plant that responsible for photosynthesis. You could say that they produce carbohydrate. Nucleus is where the DNA stored. Mitochondrion the organelle that produce energy from food.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.