Which organelle is responsible for sorting and packaging proteins for storage and/or secretion from the cell?
a. endoplasmic reticulum
b. vesicle
c. ribosome
d. golgi apparatus

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

What are the four stages of cell signaling?

Which muscle cell structure stores calcium ions that are used to trigger the contraction?