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Insectivorous Plants Video Lecture | Science Class 7 (Old NCERT)
FAQs on Insectivorous Plants Video Lecture - Science Class 7 (Old NCERT)
| 1. What are insectivorous plants and how do they capture their prey? |  |
Ans.Insectivorous plants, also known as carnivorous plants, are plants that derive some or most of their nutrients from trapping and consuming animals, primarily insects. They have evolved specialized mechanisms to attract, capture, and digest their prey. For example, the Venus flytrap uses modified leaves that snap shut when sensitive hairs are triggered by an unsuspecting insect. Other plants, like the pitcher plant, lure insects into their deep, fluid-filled leaves where they drown and are digested.
| 2. Why do some plants need to eat insects? | |
Ans.Some plants, especially those that grow in nutrient-poor soils, have adapted to supplement their nutrient intake by consuming insects. These plants often inhabit environments where nitrogen and other essential nutrients are scarce. By capturing and digesting insects, they can obtain nitrogen, phosphorus, and other nutrients necessary for their growth and development, helping them survive in challenging conditions.
| 3. What are some common examples of insectivorous plants? | |
Ans.Common examples of insectivorous plants include the Venus flytrap, pitcher plants, sundews, and bladderworts. The Venus flytrap is famous for its snapping mechanism, while pitcher plants have deep tubular leaves that trap insects in a liquid. Sundews have sticky glandular hairs on their leaves that attract and trap prey, and bladderworts use small bladders to capture tiny aquatic organisms.
| 4. How do insectivorous plants digest their prey? | |
Ans.Insectivorous plants have developed various methods for digesting their prey. After capturing an insect, these plants secrete digestive enzymes that break down the soft tissues of the prey. This process can take several days, after which the plant absorbs the nutrients released during digestion. In some species, such as sundews and pitcher plants, the digestion process is aided by symbiotic bacteria that help decompose the trapped insects.
| 5. Are insectivorous plants found all over the world? | |
Ans.Insectivorous plants are found in various regions around the world, but they are most commonly associated with tropical and subtropical climates. They thrive in environments such as wetlands, bogs, and swamps, where the soil conditions are poor in nutrients. However, some species can also be found in temperate regions. Their unique adaptations allow them to survive in diverse habitats, although their exact distribution varies by species.
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