Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution.
Q. Fungi are plants that lack:
⇒ Plants engage in photosynthesis which produces glucose from carbon dioxide and sunlight. Fungi do not contain the green pigment chlorophyll and therefore are incapable of photosynthesis. That is, they cannot generate their own food “carbohydrates” by using energy from light.
Q. What is the life span of RBC?
Ans: 100 – 120 Days
⇒ Life cycle. Human red blood cells are produced through a process named erythropoiesis, developing from committed stem cells to mature red blood cells in about 7 days. When matured, in a healthy individual these cells live in blood circulation for about 100 to 120 days.
Q. Cirrhosis is a disease that affects which organs?
⇒ Cirrhosis is when scar tissue replaces healthy liver tissue. This stops the liver from working normally. Cirrhosis is a long-term (chronic) liver disease. The damage to your liver builds up over time.
Q. Rafflesia is the plant with largest flowers and found in many parts of the South East Asia. It is a ______?
Ans: Parasitic Plant
⇒ Rafflesia is a genus of parasitic flowering plants in the family Rafflesiaceae. It contains approximately 28 species (including four incompletely characterized species as recognized by Willem Meijer in 1997), all found in Southeast Asia, mainly in Malaysia, Thailand and the Philippines.
Q. Which is a large blood vessel that carries blood away from the heart?
⇒ The arteries carry oxygen and nutrients away from your heart, to your body’s tissues. The veins take oxygen-poor blood back to the heart. Arteries begin with the aorta, the large artery leaving the heart. They carry oxygen-rich blood away from the heart to all of the body’s tissues.
Q. Which hormones is a steroid?
⇒ A steroid hormone is a steroid that acts as a hormone. Steroid hormones can be grouped into two classes: corticosteroids and sex steroids. Within those two classes are five types according to the receptors to which they bind: (Corticosteroids :Glucocorticoids and Mineralocorticoids). (Sex steroids: Androgens, Estrogens and Progestogens).
Q. The variety of coal in which the deposit contains recognisable traces of the original plant material is:
⇒ The peat is the uppermost layer of coal, it is a soft layer consisting of dead plants and animals. The second layer of coal is lignite it has a high moisture content and carbon content of 25%-35%.
Q. Nephron is the basic structural and functional unit of which organs?
⇒ The nephron is the microscopic structural and functional unit of the kidney. It is composed of a renal corpuscle and a renal tubule. The renal corpuscle consists of a tuft of capillaries called a glomerulus and an encompassing Bowman’s capsule.
Q. Calcitriol is the biologically active form of which Vitamins?
Ans: Vitamin D
⇒ Calcitriol is the active form of vitamin D, normally made in the kidney. A manufactured form is used to treat kidney disease with low blood calcium, hyperparathyroidism due to kidney disease, low blood calcium due to hypoparathyroidism, osteoporosis, osteomalacia, and familial hypophosphatemia.
Q. Which of the blood protein regulates the amount of water in plasma?
⇒ The blood protein albumin fulfils two central functions: it regulates fluid distribution between blood and tissue and transports molecules through the bloodstream.