Which of the following is absent in polluted water
Which of the following is absent in polluted water
- Hydrilla
- Water hyacinth
- Larva of stone fly
- Blue green
The Correct Option is C
Solution and Explanation
The correct option is (c) : Larva of stone fly
Exopterygote stoneflies have large antennae, biting mouthparts, aquatic nymphs, and a shaky flying. Lichens and algae with one cell tend to be the primary sources of food for adults. These are reliable markers of pollution. The larva of stoneflies (Plecoptera order) require clean, well-aerated water. Polluted water lacks it.
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Concepts Used:
Transport of Water and Minerals in Plants
Transportation is the process of movement of water and minerals to all parts of the plant body. Plants have a specialized system that enables them to distribute water and nutrients throughout their body. They use several processes such as translocation, absorption, storage and utilization of water.
Transportation in Plants:
The water and minerals are transported in plants by two types of conducting tissues:
- Xylem: The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves.
- Phloem: The phloem carries food downward from the leaves to the roots.
The three modes of transportation:
- Diffusion: The molecules in this system travel from a high-concentration region to a low-concentration region. This procedure does not necessitate the use of any energy.
- Facilitated diffusion: With the help of a carrier, usually a protein, the mechanism transports molecules from an area of higher concentration to a region of lower concentration. Because this process does not require any energy, it is referred to as a passive process.
- Active Transport: With the help of membrane proteins, this mechanism transports molecules from a lower to a higher concentration region. Because it requires ATP to function, this system is referred to as active transport.