Consider the following statements about the human heart: 1. The bicuspid valve is on the left side. 2. The tricuspid valve is on the right side. 3. The pulmonary valve prevents backflow into the right ventricle. Which of the above is/are correct? MCQ with Answer and Explanation

Explanation:
Angiogenesis is the growth of new blood vessels from pre-existing ones, important in development, wound healing, and tumor growth. Vasodilation is widening, vasoconstriction narrowing of vessels. Hematopoiesis is blood cell formation. Inhibiting angiogenesis is a cancer therapy strategy.

Explanation:
James Watson and Francis Crick, in 1953, proposed the double helix model of DNA based on X-ray diffraction data from Rosalind Franklin and Maurice Wilkins. Mendel discovered laws of heredity, Morgan linked genes to chromosomes, Beadle and Tatum proposed one gene-one enzyme, Hershey and Chase confirmed DNA as genetic material.

Explanation:
Klinefelter syndrome (47,XXY) is a sex chromosome aneuploidy causing male hypogonadism, tall stature, gynecomastia, and infertility. Turner syndrome (45,X) affects females. Down syndrome is trisomy 21. Cri du chat is deletion in chromosome 5. Nondisjunction during meiosis leads to these aneuploidies.