Consider the following statements about vitamins: 1. Vitamin K is essential for bone health. 2. Vitamin D deficiency can cause rickets. 3. Vitamin A is also known as tocopherol. Which of the above is/are correct? MCQ with Answer and Explanation

Explanation:
Cutin, along with waxes, forms the cuticle on the epidermis of leaves and stems, reducing water loss and providing protection. Lignin strengthens cell walls, cellulose is the wall polysaccharide, suberin is in cork cells and root endodermis.

Explanation:
Diatomaceous earth is a siliceous, sedimentary rock formed from the fossilized remains of diatoms. Diatoms have unique, highly resistant cell walls called frustules, made of hydrated silicon dioxide (silica). Over millions of years, these frustules accumulate on ocean and lake floors, forming diatomaceous earth, which has numerous industrial applications due to its abrasive and porous nature.

Explanation:
The diaphragm is a dome-shaped skeletal muscle that separates the thoracic cavity (lungs, heart) from the abdominal cavity. It is the primary muscle of inspiration. Pleura lines lungs, peritoneum lines abdomen.