Haryana Board (HBSE) Class 11 Biology Half Yearly Question Paper 2023 PDF Download. HBSE Class 11 Biology Half Yearly Question Paper 2023. Haryana Board Class 11 Biology Half Yearly Exam 2023. HBSE Class 11th Biology Half Yearly Paper 2023 Answer. Haryana Board Class 11 Half Yearly Paper PDF Download. Haryana Board Class 11 Biology Half Yearly Paper 2023 Solution. हरियाणा बोर्ड कक्षा 11 जीव विज्ञान अर्धवार्षिक पेपर 2023.
HBSE Class 11 Biology Half Yearly Question Paper 2023 Answer Key
1. Kranz anatomy is feature of :
(a) C3 plant
(b) C4 plant
(c) CAM plant
(d) None
Answer – (b) C4 plant
2. Which of the flowering plant material is efficient water imbibant?
(a) Agar
(b) Lignin
(c) Pectin
(d) Cellulose
Answer – (a) Agar
3. Meiosis occurs in the human female in :
(a) Kidney
(b) Ovary
(c) Liver
(d) Heart
Answer – (b) Ovary
4. The breaking of which of the following bonds leads to release of energy?
(a) P-P Bond
(b) S-S Bond
(c) N-N Bond
(d) C-C Bond
Answer – (d) C-C Bond
5. Chromatophores participate in :
(a) Photosynthesis
(b) Growth
(c) Movement
(d) Respiration
Answer – (a) Photosynthesis
6. Antibodies are chemically :
(a) Fats
(b) Protein
(c) Actin
(d) Foreign pathogens
Answer – (b) Protein
7. Vexillum is found in :
(a) Cruciferae
(b) Rosaceae
(c) Solanaceae
(d) Papilionaceous
Answer – (d) Papilionaceous
8. Flame cells are the excretory structures for :
(a) Annelida
(b) Echinodermata
(c) Platyhelminthes
(d) Coelenterates
Answer – (c) Platyhelminthes
9. Assertion (A) : Gram-negative bacteria do not retain the stain when washed with alcohol.
Reason (R) : The outer face of the outer membrane of gram-negative bacteria contains lipopolysaccharides, a part of which is integrated into the membrane lipids.
Answer – Both Assertion (A) and Reason (R) are true but Reason (R) is correct explanation of Assertion (A).
10. Assertion (A) : Cold blooded animals do not have fat layers.
Reason (R) : Cold blooded animals use their fat for metabolic process during hibernation.
Answer – Both Assertion (A) and Reason (R) are true but Reason (R) is not correct explanation of Assertion (A).
11. Define the following terms : Class, Family, Order, Genus.
Answer –
• Genus – Comprises a group of related species.
• Family – Family Comprises a group of related genera.
• Class – A class is a taxonomic rank that exists below phylum and above the order.
• Order – Order is a taxonomic rank that exist below class and above family.
12. Why xylem and phloem are called complex tissues?
Answer – Xylem and Phloem are called complex tissues because they are made up of more than one type of cells and all these different types of cells coordinate to perform the same function.
13. Name three group of plants that bear archegonia?
Answer– The three groups of plants that bear archegonia are bryophytes including mosses and liverworts, pteridophytes which include horsetails and ferns and gymnosperms.