The hormone that lowers blood calcium by depositing it in bones is: MCQ with Answer and Explanation

Explanation:
The tonoplast is the single membrane enclosing the central vacuole in plant cells. It regulates the movement of ions, sugars, and waste products into and out of the vacuole, maintaining turgor pressure. The nuclear membrane is the nuclear envelope, mitochondria have inner/outer membranes, chloroplasts have a double membrane.

Explanation:
The pancreas functions as an exocrine gland (secreting digestive enzymes into the duodenum via the pancreatic duct) and an endocrine gland (secreting insulin, glucagon, somatostatin from the islets of Langerhans into the blood). Thyroid, pituitary, and adrenals are purely endocrine.

Explanation:
Self-pollination (autogamy) occurs within the same flower. Geitonogamy is pollination between different flowers of the same plant, functionally cross-pollination. Xenogamy is between different plants. Self-pollination leads to genetic uniformity.