Which of the following statements about ecological pyramids is correct? MCQ with Answer and Explanation

Explanation:
Arteries (except pulmonary arteries) carry oxygenated blood away from the heart to body tissues. Pulmonary arteries carry deoxygenated blood from heart to lungs. Veins return blood to the heart. Capillaries are exchange vessels. Arteries have thick elastic walls to withstand high pressure. The aorta is the largest artery. Remember: 'A' for Artery = Away from heart.

Explanation:
Vitamin A is a fat-soluble vitamin stored primarily in the liver, and excess can lead to toxicity. The B-complex vitamins are water-soluble and generally not stored in the body in significant amounts. Fat-soluble vitamins (A, D, E, K) are stored in body fat and liver, making excess Vitamin D difficult to excrete, potentially causing hypervitaminosis D. Thus, statements 1 and 2 are correct.

Explanation:
Zika virus is primarily transmitted by Aedes aegypti and Aedes albopictus mosquitoes. It can cause microcephaly in fetuses. Anopheles transmits malaria, Culex filariasis/West Nile.