Rewrite the correct option of each question in your answer sheet.
[11×1=11]What type of ground tissue is the most common and helps store food and water?
(A) Parenchyma (B) Collenchyma
(C) Sclerenchyma (D) Xylem
Which of the following genotypes represents monosomy, a type of aneuploidy?
(A) 2n-2 (B) 2n+2 (C) 2n-1 (D) 2n+1+1
Which of the following epithelial tissue has hexagonal flat cells?
(A) Cuboidal (B) Squamous
(C) Columnar (D) Pseudo-stratified
Which structure in some plants help to remove excess water in liquid form?
(A) Lenticels (B) Passage cells
(C) Stomata (D) Hydathodes
Which RNA carries amino acids to ribosomes during protein synthesis?
(A) rRNA (B) tRNA (C) mRNA (D) snRNA
Which of the following hormone is called emergency hormone?
(A) Thyroxine (B) Calcitonine
(C) Insulin (D) Adrenaline
Cerebellum is an organ of human brain. Which part of brain does this organ located?
(A) Fore brain (B) Mid brain (C) Hind brain (D) Spinal cord
What is the primary function of the cambium in perennial dicot vascular plants?
(A) To produce lateral roots
(B) To provide structural support
(C) To produce new xylem and phloem cells
(D) To regulate transpiration
Hemoglobin is an essential to be present in RBC. Which is the appropriate reason?
(A) To make blood red (B) To transport oxygen
(C) To transport carbon-dioxide (D) To detect blood groups
If a transplantation of organ is done between two genetically identical twins, what would be that kind of transplantation called?
(A) Isograft (B) Allograft
(C) Xenograft (D) Autograft
A woman with normal vision has a colourblind father. She marries a man with normal vision. What is the probability that their son will be colourblind?
(A) 0% (B) 25% (C) 100% (D) 50%
Short answer questions.
[8×5=40]What is diffusion? Explain its significance and factors that affect diffusion. [1+4] Or What is osmosis? Explain its significance and factors that affect osmosis.
State Mendel's law of dominance with a suitable example. [5]
Compare and contrast DNA and RNA. [2+3]
Draw a labelled diagram of T.S. of monocot stem and compare it with that of dicot stem. [3+2]
Define menstrual cycle. Explain its various phases in women. [1+4] Or Explain structure and function of parathyroid gland. Name a disorder caused due to its hypersecretion. [2+2+1]
Compare and contrast areolar tissue and adipose tissue. [2.5+2.5]
How do environmental factors influence different types of transpiration? [5]
Genetic engineering has revolutionized medicine. Analyze benefits and potential risks of genetic engineering in medical applications. [3+2]
Long answer questions.
[3×8=24]What is influenza? Mention its causative agent, mode of transmission, symptoms and treatment. What happens to the body when any vaccine is introduced? [1+2+2+2+1]
Briefly describe the structure of primary excretory organs of human beings with a neat diagram. How does the hydrostatic pressure created in glomerulus? [4+3+1]
How do mutations occur, and what are mutagens and their role in mutation? Analyze different types of gene mutations and evaluate their significance in evolution and genetic disorders. [2+4+2] Or Tall plants with round seeds are crossed with dwarf plants with wrinkled seeds. Which of Mendel's law does this experiment illustrate? Explain in detail and determine the phenotypic and genotypic ratios using Punnett square. [1+4+3]