1. A dry indehiscent,winged fruit formed from
one carpel is known as
A. schizocarp
B. caryopsis
C. samara
D. nut

2. The stem of young herbaceous plants are
kept upright mainly by
A. osmotic pressure
B. turgidity
C. transpiration pull
D. root pressure

3. A dwarf plant can be stimulated to grow to
normal height by the application of
A. thyroxin
B. gibberelin
C. insulin
D. kinin

4. Which of the following does not exist as a
single free-living cell?
A. amoeba
B. euglena
C. chlymadomonas
D. volvox

5. The ability of an organism to maintain a
constant internal environment is known as
A. diuresis
B. endosmosis
C. plasmolysis
D. homeostasis

6. The name of the bacteria which derives
energy from oxidizing nitrities to nitrates is
A. nitrosomonas
B. azobacter
C. nitrobacter
D. escherichia coli

7. Where is the energy produced in a cell?
A. nucleus
B. lysosomes
C. mitochondria
D. nucleolus

8. Which of the following components of an
ecosysem has the greatest biomass?
A. primary producers
B. primary consumers
C. secondary consumers
D. tertiary consumers

9. The difference between viviparous and
oviparous animal is
A. possession of yolked eggs
B. laying and brooding of eggs
C. possession of yolkless egg
D. laying of unfertilized eggs

10. The young shoot of a plant is referred to as
A. radicle
B. plumule
C. bud
D. branch

11. Bryophytes are different from flowering
plant because they
A. are simple small plants
B. carry out alternation of generation
C. posses small
D. posses no vascular tissue

12. The condition known as cretinism is caused
by deficiency of
A. vitamin A
B. insulin
C. thyroxin
D. vitamin C

13. Which of the following is the medium of
transportation of nutrients in unicellular
A. lymph
B. plasma
C. protoplasm
D. serum

14. In lower plants like mosses, the structure
which performs the functions of roots of
higher plants is called.
A. root hairs
B. rhizoids
C. hyphae
D. rots

15. Fruit enlargement can be induced by
spraying young ovary with
A. gibberellins, ethylene and absisic acid
B. auxin, anscisic acid and gibberellins
C. auxin, cytokinin and gibberellins
D. auxin, kinin and gibberellins

16. The following are features of the tropical
rainforest except
A. loose and moist soil
B. short tress growing beneath tall trees
C. scanty trees with small leaves
D. presence of many animals

17. Potometer is used to measure
A. rate of osmosis
B. rate of diffusion
C. rate of tranpiration
D. rate of photosynthensis

18. In aerobic respiration, oxidative
phosphorylation take place in
A. cytoplasm
B. lysosome
C. mitochondrion
D. ribosomes

19. Which of the following tissues is not found
in the stem and root of monocotyledons?
A. xylem
B. cambium
C. pitch
D. pericycle

20. What is the function of contractile vacuole in
A. produces enzymes
B. get rid of excreta
C. stores and digests food
D. gets rid of excess water

21. In which of the following organisms does a
single cell perform all functions of an active
movement, nutrition, growth, excretion and photosynthensis ?
A. paramecium
B. amoeba
C. euglena
D. hydra

22. A fruit which develops without fertilization is
described as
A. simple
B. aggregate
C. multiple
D. parthenocarpic

23. Euglena is an autotrophic organism because
A. has flagella
B. has plant and animal features
C. can manufacture its food
D. moves fast

24. Meiotic cell division ensures that
A. many similar cells are produced
B. chromosome number of cells is
C. cells produced are doubled
D. cells produced posses the same
chromosome number


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