Which of the numbered structures secretes a hormone that controls ovulation in females?

Here are the solutions to the biology questions: 10. The diagram shows the water cycle. Condensation leads to the formation of clouds, and then water falls back to Earth as rain, snow, or hail. This process is known as precipitation. The correct answer is B) Precipitation. 11. The right atrium receives deoxygenated blood. Blood flows from the right atrium into the right ventricle. The valve that prevents the backflow of blood from the right ventricle into the right atrium is the tricuspid valve. The correct answer is D) Tricuspid valve. 12. In bony fish, the tail fin (caudal fin) is primarily responsible for providing thrust and enabling forward movement. The correct answer is D) Tail fin. 13. After fertilization, the embryo travels to the uterus, where it implants into the uterine wall to continue its development. The correct answer is D) Uterus. 14. The diagram shows various endocrine glands. Structure 'i' points to the pituitary gland, which is located at the base of the brain. The pituitary gland secretes hormones like Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH), which directly control ovulation in females. The correct answer is A) i. 15. Cartilage is a smooth, elastic tissue that covers the ends of bones in joints, such as the elbow joint. Its primary function is to reduce friction between the bones and absorb shock during movement. The correct answer is A) Cartilage. 16. A nerve cell (neuron) consists of a cell body, dendrites, and an axon. Dendrites receive impulses towards the cell body, while the axon conducts nerve impulses away from the cell body to other neurons, muscles, or glands. The correct answer is A) Axon. 17. After a heavy meal, digested food nutrients are absorbed from the small intestine into the bloodstream. This nutrient-rich blood is then transported directly to the liver via the hepatic portal vein for processing before entering the general circulation. The correct answer is A) Hepatic portal vein. 18. Spirogyra is a type of green algae, which means it is autotrophic and produces its own food through photosynthesis. Photosynthesis takes place in specialized organelles called chloroplasts. The correct answer is B) Chloroplast. 19. Gaseous exchange in the lungs, where oxygen enters the blood and carbon dioxide leaves it, occurs in the tiny air sacs called alveoli. The other structures (trachea, bronchus, bronchiole) are part of the conducting airways but not the primary sites of gas exchange. The correct answer is D) Alveolus. 20. In the given food chain: Sun → maize → goat → lion. • Maize is a producer (it makes its own food). • The goat eats the maize, making it a primary consumer. • The lion eats the goat, making it a secondary consumer. The correct answer is C) Primary consumer. Send me the next one 📸