The condition caused by excessive secretion of thyroxine is: MCQ with Answer and Explanation

Explanation:
A joint (articulation) is the site where two or more bones meet, allowing movement (synovial joints) or providing stability (fibrous and cartilaginous joints). Tendons connect muscle to bone, ligaments connect bone to bone. Cartilage is a connective tissue that cushions joints. The elbow, knee, and hip are examples of synovial joints.

Explanation:
The pituitary controls many glands (master gland). Thyroxine from the thyroid increases BMR. Adrenaline increases heart rate during stress, not decreases. So 1 and 2 are correct.

Explanation:
Transpiration is the loss of water vapor primarily through the stomata on the leaf surface. Guttation is the exudation of liquid water from the margins of leaves through specialized structures called hydathodes, usually at night when root pressure is high. Phloem is responsible for the translocation of organic food (bidirectional), while xylem transports water and minerals upwards. Thus, statements 1 and 2 are correct.