Biology problems
- 1. Plants growing on sand are called as
Options- A. chasmophytes
- B. oxylophytes
- C. lithophytes
- D. psammophytes Discuss
Correct Answer: psammophytes
- 2. Number of chromosomes in Down's syndrome is
Options- A. 46
- B. 47
- C. 48
- D. 49 Discuss
Correct Answer: 47
- 3. Photosynthesis takes place faster in
Options- A. yellow light
- B. white light
- C. red light
- D. darkness Discuss
Correct Answer: white light
- 4. 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
Correct Answer: by the union of foetal and uterine tissue
- 5. 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
Correct Answer: ancestors of modern man
- 6. Movement of cell against concentration gradient is called
Options- A. osmosis
- B. active transport
- C. diffusion
- D. passive transport Discuss
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.
- 7. Plant have ____ while animals lack it.
Options- A. starch
- B. cellulose
- C. protein
- D. fat Discuss
Correct Answer: cellulose
- 8. Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
Options- A. angiosperms
- B. gymnosperms
- C. monocotyledons
- D. dicotyledons Discuss
Correct Answer: gymnosperms
- 9. On which of the following plants did Gregor Mendal perform his classical experiment?
Options- A. Gram
- B. Maize
- C. Pea
- D. Wheat Discuss
Correct Answer: Pea
- 10. Most abundant tissues of our body are
Options- A. muscular
- B. connective
- C. epithelial
- D. nervous Discuss
Correct Answer: connective
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