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- Question
Movement of cell against concentration gradient is called
Options- A. osmosis
- B. active transport
- C. diffusion
- D. passive transport
- Correct Answer
- active transport
ExplanationActive 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. - 1. 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
- 2. 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
- 3. Photosynthesis takes place faster in
Options- A. yellow light
- B. white light
- C. red light
- D. darkness Discuss
- 4. Number of chromosomes in Down's syndrome is
Options- A. 46
- B. 47
- C. 48
- D. 49 Discuss
- 5. Plants growing on sand are called as
Options- A. chasmophytes
- B. oxylophytes
- C. lithophytes
- D. psammophytes Discuss
- 6. Plant have ____ while animals lack it.
Options- A. starch
- B. cellulose
- C. protein
- D. fat Discuss
- 7. 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
- 8. On which of the following plants did Gregor Mendal perform his classical experiment?
Options- A. Gram
- B. Maize
- C. Pea
- D. Wheat Discuss
- 9. Most abundant tissues of our body are
Options- A. muscular
- B. connective
- C. epithelial
- D. nervous Discuss
- 10. Pollination by wind is called
Options- A. anemophily
- B. hydrophily
- C. zoophily
- D. entomophily Discuss
Biology problems
Search Results
Correct Answer: ancestors of modern man
Correct Answer: by the union of foetal and uterine tissue
Correct Answer: white light
Correct Answer: 47
Correct Answer: psammophytes
Correct Answer: cellulose
Correct Answer: gymnosperms
Correct Answer: Pea
Correct Answer: connective
Correct Answer: anemophily
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