1st Year Biology 3rd Quarter Book Paper

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

1. Long-day plants require ______ to flower.
   1. Short nights
   2. Long nights
   3. No light
   4. Continuous dark
2. The ABO blood group system was discovered by
   1. Watson
   2. Mendel
   3. Karl Landsteiner
   4. Morgan
3. The human ovary produces
   1. Sperm
   2. Ova
   3. Milk
   4. Hormones only
4. Triploblastic animals have ______ germ layers.
   1. One
   2. Two
   3. Three
   4. Four
5. The most accepted theory of translocation is ______.
   1. Diffusion theory
   2. Capillary theory
   3. Osmotic theory
   4. Pressure flow theory
6. The basic unit of heredity is
   1. Chromosome
   2. DNA
   3. Gene
   4. Nucleotide
7. Which of the following hormones provides hormonal trigger to cause ovulation & release of eggs from ovary.
   1. Estrogen
   2. Testosterone
   3. Luteinizing hormon (LH)
   4. All of these
8. The water vascular system is characteristic of __________.
   1. Arthropods
   2. Echinoderms
   3. Annelids
   4. Molluscs
9. Water potential of pure water is ______.
   1. Positive
   2. Zero
   3. Negative
   4. Variable
10. Genes located on autosomes show
    1. Sex linkage
    2. Dominant linkage
    3. Recessive linkage
    4. Autosomal linkage
11. Fertilization of the ovum normally occurs:
    1. In distal part of oviduct
    2. Along the uterine wall
    3. In proximal part of oviduct
    4. Successfully in vagina
12. The main identifying feature of chordates is the presence of __________.
    1. Brain
    2. Notochord
    3. Gills
    4. Segmentation