Discussion
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- Question
Number of chromosomes in Down's syndrome is
Options- A. 46
- B. 47
- C. 48
- D. 49
- Correct Answer
- 47
- 1. Plants growing on sand are called as
Options- A. chasmophytes
- B. oxylophytes
- C. lithophytes
- D. psammophytes Discuss
- 2. Plants developing in dry conditions are
Options- A. xerophytes
- B. mesophytes
- C. lithophytes
- D. hydrophytes Discuss
- 3. Most fish do not sink in water because of the presence of
- swim bladder
- air bladder
- air sacs
- air in spongy bones
Options- A. I and II are correct
- B. II and III are correct
- C. III and IV are correct
- D. I, II, III and IV are correct Discuss
- 4. Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes
Options- A. tetanus
- B. influenza
- C. cholera
- D. typhoid Discuss
- 5. Oxygen in our blood is transported by a protein named
Options- A. haemoglobin
- B. keratin
- C. collagen
- D. myoglobin Discuss
- 6. Photosynthesis takes place faster in
Options- A. yellow light
- B. white light
- C. red light
- D. darkness Discuss
- 7. Placenta is the structure formed
Options- A. by the union of foetal and uterine tissue
- B. by foetus only
- C. by fusion of germ layers
- D. None of these Discuss
- 8. Ramapithecus and Cro-Magnon man are considered
Options- A. ancestors of modern man
- B. ancestors of monkey
- C. ancestors of lion
- D. None of the above Discuss
- 9. Movement of cell against concentration gradient is called
Options- A. osmosis
- B. active transport
- C. diffusion
- D. passive transport Discuss
- 10. Plant have ____ while animals lack it.
Options- A. starch
- B. cellulose
- C. protein
- D. fat Discuss
Biology problems
Search Results
Correct Answer: psammophytes
Correct Answer: xerophytes
Correct Answer: I and II are correct
Correct Answer: cholera
Explanation:
Vibrio cholerae (also Kommabacillus) is a gram negative comma-shaped bacterium with a polar flagellum that causes cholera in humans
Correct Answer: haemoglobin
Correct Answer: white light
Correct Answer: by the union of foetal and uterine tissue
Correct Answer: ancestors of modern man
Correct Answer: active transport
Explanation:
Active transport, this is the only transport method that can move species against their concentration gradient (from low to high concentration). Facilitated diffusion only moves species down their concentration gradient from high to low concentration.
Correct Answer: cellulose
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