Option “4” is correct Platelets, also called thrombocytes are a component of blood whose function (along with the coagulation factors) is to stop bleeding by clumping and clotting blood vessel injuries.
804. The maximum loss of water in transpiration is from—
1. Cuticle
2. Stomata
3. Hydothodes
4. Lenticles
Option “2” is correct
The maximum loss of water in transpiration is from stomata.
805. Which one of the following processes is involved in plants?
1. Transpiration
2. Photosynthesis
3. Both (a) and (b)
4. None of the above
Option “3” is correct Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers.
806. Which of the following vitamins contain cobalt?
Option “2” is correct Chilies are valued principally for their high pungency and colour. Pungency in chillies is due to the active constituent “Capsaicin” an alkaloid which is extracted from chillies and is used to the medicine.
808. Point out the incorrect pair:
1. Green Revolution – Agricultural Development
2. White Revolution – Dairy Development
3. Blue Revolution – Development of Fisheries
4. Operation Flood – Irrigation Development
Option “4” is correct Operation Flood, launched in 1970 is a project of the National Dairy Development Board (NDDB), which was the world’s biggest dairy development program.
809. Opposite the micropylar end, is the __________, representing the basal part of the ovule.
1. Hilum
2. Funicle
3. Chalaza
4. Nucellus
Option “3” is correct In plant ovules, the chalaza is located opposite the micropyle opening of the integuments. It is the tissue where the integuments and nucellus are joined. Nutrients from the plant travel through vascular tissue in the funiculus and outer integument through the chalaza into the nucellus.
810. In unicellular organisms, all functions like digestion, respiration and reproduction are performed by a how many cell(s)?
1. 1
2. 2
3. 3
4. 4
Option “1” is correct A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell. The main groups of unicellular organisms are bacteria, archaea, protozoa, unicellular algae, and unicellular fungi. These organisms live together, and each cell in the colony is the same. However, each individual cell must carry out all life processes (digestion, respiration and reproduction etc.) to survive.
