No, calcium is not present in chlorophyll.
Chlorophyll, the pigment responsible for photosynthesis in plants, contains a specific metal ion at its core: magnesium (Mg). While other elements like iron (Fe) are crucial for chlorophyll synthesis, they are not part of the chlorophyll molecule itself. Calcium plays important roles in plant physiology, but it is not incorporated into the structure of chlorophyll.
Therefore, the answer is definitively no.
