Which of the following increase the risk of developing osteoporosis?
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Which of the following has open vascular system?
Which feature of the cell allows or permits the entry and exit of some materials in and out of the cell?
___ has naked seeds.
Prawns belong to which family?
Which enzyme has been used by scientists of Massachusetts Institute of Technology to induce plants to give off dim light?
Lungs are the primary organs of _________.
Which component of the blood transports food, CO2 and nitrogenous waste?