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- Question
Ptyalin is an enzyme produced in the
Options- A. salivary glands
- B. pituitary glands
- C. thyroid glands
- D. pancreas
- Correct Answer
- salivary glands
- 1. Mutation is
Options- A. a factor responsible for plant growth
- B. a change which affects the offspring of F2 generation only
- C. a change that is inherited
- D. a change which affects the parents Discuss
- 2. Movements due to light are shown by
Options- A. flowering plants
- B. lower plants
- C. all land plants
- D. all the plants Discuss
- 3. Myopia is connected with
Options- A. ears
- B. eyes
- C. lungs
- D. None of these Discuss
- 4. Plants are killed in winter by frost
Options- A. because of desiccation and mechanical damage to the tissues
- B. because no photosynthesis takes place at such low temperature
- C. because respiration ceases at such low temperature
- D. because there is no transpiration Discuss
- 5. Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with
Options- A. all gymnosperms, except conifers
- B. only angiosperms
- C. only conifers
- D. angiosperms and all gymnosperms except conifers Discuss
- 6. One of the following is most suitable for study of mutations
Options- A. Haploids
- B. Diploids
- C. Tetraploids
- D. Polyploid Discuss
- 7. Most highly intelligent mammals are
Options- A. whales
- B. dolphins
- C. elephants
- D. kangaroos Discuss
- 8. Prokaryotic cells lack
Options- A. nucleolus
- B. nuclear membrane
- C. membrane bound by organelles
- D. All of these Discuss
- 9. Organic Substances which, in very small amounts, control growth and development called
Options- A. vitamins
- B. hormones
- C. enzymes
- D. None of the above Discuss
- 10. Phloem is a tissue found in
Options- A. reproductive organs of animals
- B. plants
- C. insects
- D. mammals Discuss
Biology problems
Search Results
Correct Answer: a change that is inherited
Correct Answer: flowering plants
Correct Answer: eyes
Correct Answer: because of desiccation and mechanical damage to the tissues
Correct Answer: only conifers
Correct Answer: Haploids
Correct Answer: dolphins
Correct Answer: All of these
Correct Answer: hormones
Correct Answer: plants
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