General Knowledge
BIOLOGY MCQs
Total Questions : 1207
| Page 4 of 121 pages
Answer: Option A. -> Stomata
The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapour in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.
The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapour in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.
Answer: Option A. -> Exchange of gases
Stomata helps in exchange of gases.
Stomata helps in exchange of gases.
Answer: Option A. -> Stomata
The numerous minute pores in the epidermis of a leaf are called stomata.
The numerous minute pores in the epidermis of a leaf are called stomata.
Answer: Option A. -> CAM plants
In CAM plants, stomata are open during the night and closed during day time. This is an adaptation of cutting transpiration loss of water. CAM plants grow in deserts and are exposed to high temperatures.Their stomata are open during the night for carbon dioxide uptake but closed during the day to prevent water loss.
Thus, the correct answer is option C.
In CAM plants, stomata are open during the night and closed during day time. This is an adaptation of cutting transpiration loss of water. CAM plants grow in deserts and are exposed to high temperatures.Their stomata are open during the night for carbon dioxide uptake but closed during the day to prevent water loss.
Thus, the correct answer is option C.
Answer: Option D. -> Guttation
Guttation is the loss of water in the form of water droplets from hydathodes (small pores) on the leaf margin of a small herbacious plant.
Guttation is the loss of water in the form of water droplets from hydathodes (small pores) on the leaf margin of a small herbacious plant.
Answer: Option D. -> You are infected by a virus
The most likely reason for the doctor's statement is that the person is infected by a virus.
The most likely reason for the doctor's statement is that the person is infected by a virus.
Answer: Option B. -> enzymes
Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of enzymes.
Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of enzymes.
Answer: Option C. -> a change that is inherited
A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
Answer: Option C. -> mesophytes
Plants that grow under average temperature and moisture are called mesophytes.
Plants that grow under average temperature and moisture are called mesophytes.
Answer: Option A. -> anemophily
Anemophily is the process when pollen is transported by air currents from one individual plant to another. About 12% of the world's flowering plants are wind-pollinated, including grasses and cereal crops, many trees, and the infamous allergenic ragweeds.
Anemophily is the process when pollen is transported by air currents from one individual plant to another. About 12% of the world's flowering plants are wind-pollinated, including grasses and cereal crops, many trees, and the infamous allergenic ragweeds.
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