Insulin is a hormone that allows our body to use sugar (glucose) from carbohydrates in the food that we eat for energy or to store glucose for future use. Insulin helps keeps our blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia).Insulin is a peptide hormone produced by beta cells of the pancreatic islets.

Correct Option: D

Insulin is a hormone that allows our body to use sugar (glucose) from carbohydrates in the food that we eat for energy or to store glucose for future use. Insulin helps keeps our blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia).Insulin is a peptide hormone produced by beta cells of the pancreatic islets.

Haematopoiesisis the formation of blood cellular components. The sites where haematopoiesis occurs change during embryonic development, but in adult mammals, the bone marrow is the major site of haematopoiesis. Haematopoietic stem cells in the bone marrow reside in a specialised microenvironment known as the hematopoietic stem cell niche, composed of osteoblasts, mesenchymal cells and sinusoidal vessels.

Correct Option: D

Haematopoiesisis the formation of blood cellular components. The sites where haematopoiesis occurs change during embryonic development, but in adult mammals, the bone marrow is the major site of haematopoiesis. Haematopoietic stem cells in the bone marrow reside in a specialised microenvironment known as the hematopoietic stem cell niche, composed of osteoblasts, mesenchymal cells and sinusoidal vessels.

Potatoes are examples of tubers : the swollen ends of stolons that may store starch. It is a stem because it has many nodes called eyes with spaces between eyes known as internodes. Potato tubers develop at the end of swollen underground stem structures, rhizomes. Eyes of potatoes are really axillary buds which contain several small buds at each site. These buds can expand to form shoots which grow on to make whole plants.

Correct Option: B

Potatoes are examples of tubers : the swollen ends of stolons that may store starch. It is a stem because it has many nodes called eyes with spaces between eyes known as internodes. Potato tubers develop at the end of swollen underground stem structures, rhizomes. Eyes of potatoes are really axillary buds which contain several small buds at each site. These buds can expand to form shoots which grow on to make whole plants.

Ultrastrong spider silk is one of the toughest natural fibers known in nature. The light, flexible fiber is five times stronger by weight than high-grade steel and extremely stretchy, enlarging to snag incoming insects and other prey.

Correct Option: D

Ultrastrong spider silk is one of the toughest natural fibers known in nature. The light, flexible fiber is five times stronger by weight than high-grade steel and extremely stretchy, enlarging to snag incoming insects and other prey.

Gastric acid, gastric juice or stomach acid, is a digestive fluid, formed in the stomach. It is composed of hydrochloric acid (HCl), potassium chloride (KCl) and sodium chloride (NaCl). Gastric acid plays a key role in digestion of proteins, by activating digestive enzymes.

Correct Option: B

Gastric acid, gastric juice or stomach acid, is a digestive fluid, formed in the stomach. It is composed of hydrochloric acid (HCl), potassium chloride (KCl) and sodium chloride (NaCl). Gastric acid plays a key role in digestion of proteins, by activating digestive enzymes.