The calcium that triggers muscle contraction is stored in synaptic vesicles called endoplastic reticulum. that is not the only function of the endoplastic reticulum it is also a network of a membranous tubules within the cytoplasm of a eucryotic cell continuous with the nuclear membrane.
Answer:
a) A roan cow and a white bull is crossed
Explanation:
First option - 1
Second option - 4
Third option - 5
Fourth option - 2
Fith option - 3
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They make energy for the cell
