Advertisements
Advertisements
प्रश्न
When we observe the lower surface of a leaf through a magnifying lens we see numerous small openings. Which of the following is the term given to such openings?
विकल्प
Stomata
Lamina
Midrib
Veins
Advertisements
उत्तर
Stomata
Explanation:
Lamina is the green expanded part of the leaf with veins and veinlets. Midrib is middle prominent vein. Veins provide rigidity to leaf and act as channels for the transport of water, minerals and food materials. Stomata are the minute pores usually located on the underside of the leaves and take part in the exchange of gases (O2 and CO2) during photosynthesis and respiration. They are surrounded by guard cells.
APPEARS IN
संबंधित प्रश्न
Classify according to food-type.
Deer
Classify according to food-type.
Lion
Short Answer Type Questions:
Name the vitamin that our body prepares in the presence of sunlight.
Meat alone is sufficient to provide all nutrients to the body.
The nutrient required in trace amounts to accomplish various body functions is ______.
Differentiate
Kwashiorkar from Marasmus
Which is the first enzyme to mix with food in the digestive tract?
What is common for Cuscuta, ticks and leeches?
Explain the process of nutrition in Amoeba.
Take a potted plant with broad leaves. Take two strips of black paper and cut out a small square in the centres. Cover a part of two leaves with these papers and secure them with paper clips Figure. Keep the plant in sunlight for 2–5 days. Observe the difference in the colour of the covered and the uncovered portions on the leaf. Perform iodine test on this leaf. Did the two parts show different results? Now take second leaf. Remove the strip and expose the covered part to the sunlight for 2–3 days and do the iodine test again. Describe your observations.
