2nd Year Biology Chapter 19 Notes

• Important 2nd Year Biology Chapter 19 mcqs for Intermediate part-II students.
• 1. The removal of apex releases the lateral buds from the apical dominance. It is:  (A) Inhibitory effect  (B) Apical dominances  (C) Reproduction  (D) Compensatory
• 2. Primary growth in plants is caused by:  (A) Lateral meristem  (B) Apical meristem  (C) Intercalary meristem  (D) Rib meristem
• 3. How many folds, cell volume, increase during elongation due to uptake of water:  (A) 120  (B) 150  (C) 130  (D) 180
• Important 2nd Year Biology Chapter 19 pdf for Intermediate part-II students.
• 4. During elongation the cell volume increase up to:  (A) 150 fold  (B) 50 fold  (C) 100 fold  (D) 200 fold
• 5. Secondary growth leads to an increase in the diameter of the:  (A) Stem  (B) Stem and Root  (C) Root  (D) Leaf
• 6. Apical dominance is caused by:  (A) Gibberllins  (B) Cytokinins (C) Auxins (D) Ethene
• Important 2nd Year Biology Chapter 19 short questions for Intermediate part-II students.
• 7. Apical meristems are present in:  (A) Vascular cambium  (B) Shoot and root rips  (C) Stem nodes  (D) Corks ambium
• 8. The negative physiological changes in our body are said to be:  (A) Maturation  (B) Aging  (C) Childhood  (D) Death
• 9. Fertilization is the process which leads to the union of:  (A) Individuals  (B) Sperms  (C) Gametes  (D) Eggs
• Important 2nd Year Biology Chapter 19 important short questions for Intermediate part-II students.
• 10. A plant has a growth pattern called?  (A) Growing point  (B) Meristem  (C) Apical meristem  (D) Open growth
• 11. Cleavage results in the formation of rounded closely packed mass of blastomeres, known as:  (A) Blastulla  (B) Morulla  (C) Gastrula  (D) Neurula
• 12. The germ layers are formed during:  (A) Cleavage  (B) Organogenisis  (C) Gastrulation  (D) Growth
• Important 2nd Year Biology Chapter 19 important long questions for Intermediate part-II students.
• 13. The mesodermal cells do not invaginate but migrate medially and caudally from both sides and create a midline thickening called?  (A) Hensen's Node  (B) Primitive streak  (C) Epiblast  (D) Hypoblast
• 14. The mesodermal cells do not invaginate but migrate medially and caudally from both sides and create a midline thickening called?  (A) Henseon's node  (B) Primitive streak   (C) Epiblast  (D) Hypoblast
• Important Biology second Year Chapter 19 short questions for Intermediate part-II students.

• What are the growing points?
• What is secondary growth?
• Name the factors by which the rate of growth is influenced.
• What is correlation?
• What is discoidal cleavage?
• What is the role of cytokinins in apical dominance?
• Which process is defined as negative physiological changes?
• Due to what factors normal process of development is disturbed?
• Define embryonic induction.
• Differentiate between growth and development?
• What is meristem?
• What is open growth?
• What is Apical Meristem?
• differentiate economic development and economic growth.
• What are Intercalary Meristems?
• What are Lateral meristems?
• Define differentiation.
• What was the work of Thimann and Skoog?
• Differentiate between inhibitory and compensatory effects?
• What is the temperature for the incubation of a chick egg?
• Define Cleavage. What is Morula? What is Blastula?
• what is blastoderm?
• What is a zone of junction in a developing chick embryo?
• Define Gastrulation.
• Which two layers are formed from blastoderm during gastrulation?
• What is area pellucida?
• What is area opaca?
• What is a Primitive streak?
  
• What is a primitive node?
• What is Hensen's node?
• What is a Germ wall?
• What is gastrocoele?
• How many layers, the lateral plate mesoderm is split-ted into?
• What is coelom? What is Neurula? How neural plate is formed?
• How neural tube is formed in a chick embryo?
• What are neuropores?
• What was the work of Dietrich?
• What is Acetabularia? What is primary induction?
• Define regeneration. What are neoblasts? 
• Important long question of Biology 2nd year chapter 19