The structure that connects bone to bone in a joint is: MCQ with Answer and Explanation

Explanation:
The human heart is a four-chambered muscular organ consisting of two upper atria (receiving chambers) and two lower ventricles (discharging chambers), ensuring complete separation of oxygenated and deoxygenated blood. The lungs are a pair of spongy, air-filled organs located on either side of the chest, serving as the primary site for gas exchange (respiration). The brain, the control center of the nervous system, is encased and protected by the bony cranium (skull). All statements are correct.

Explanation:
Ovulation is the process where a mature ovum (secondary oocyte) is released from the Graafian follicle of the ovary, typically around day 14 of the menstrual cycle, triggered by the LH surge. The ovum is captured by the fimbriae of the fallopian tube. Fertilization is fusion with sperm, menstruation is shedding of the uterine lining, implantation is embedding of the blastocyst.

Explanation:
Chlorella and Spirulina (a cyanobacterium) are used as single-cell proteins and health supplements due to their high protein content (up to 60%) and essential nutrients. Gelidium is used for agar, Sargassum is a brown alga, Polysiphonia a red alga. Chlorella is a unicellular green alga.