please answer this five questions
1.
How can we decolourise a leat? Expla
2. What are plant parasites? Name any two plant parasites.
3. How does the pitcher plant catch its prey?
4.
Differentiate between parasitic and insectivorous plants.
5. Algae and fungi live together in lichens.
(a) What is this association called?
(b) What value can we learn from this association in nature?
Questions:
Answers
Answer:
1.The leaf can be decolourised by boiling it and placing it in an alcohol bath. It shows that white patches do not photosynthesize as iodine turns blue black in the presence of starch. To decolourise a leaf we have to first take a beaker half-filled with water.
2.Plants usually considered holoparasites include broomrape, dodder, Rafflesia, and the Hydnoraceae. Plants usually considered hemiparasites include Castilleja, mistletoe, Western Australian Christmas tree, and yellow rattle.
3.Pitcher plants are several different carnivorous plants which have modified leaves known as pitfall traps—a prey-trapping mechanism featuring a deep cavity filled with digestive liquid. ... The plants attract and drown their prey with nectar.
4.Parasitic plants cannot photosynthesise and hence, are depended on other living organisms for their nutrition. Mistletoe is a partial parasite. Insectivorous plants-These plants can photosynthesise but lack only in nitrogen.So,to fulfil this requirement,they consume the digestive nutrients in the insects
5.Algae and fungi live together in lichens (1) What is this association called? (2) What value can be learn from this association in nature ? 1) This association is known as lichen. 2) This is a symbiotic relationship where both of them benefit each other.
ANSWERS:-
1) The leaf can be decolourised by boiling it and placing it in an alcohol bath. It shows that white patches do not photosynthesize as iodine turns blue black in the presence of starch. To decolourise a leaf we have to first take a beaker half-filled with water.
2) A parasitic plant is a plant that derives some or all of its nutritional requirement from another living plants.
eg -dodder, Rafflesia
3) Inside the pitcher; there are several hair-like structures. These hairs direct the trapped insects downwards. When an insect sits on the pitcher of the plant, the lid closes and the insect gets trapped inside the pitcher. The insect is then digested by the enzymes secreted by the cells of the plants.
4) Parasitic plants are ones that are parasitic on other plants, meaning they have a negative one way interaction with its host. One example would be mistletoe plants grown on a variety of tree species such as cottonwoods.
An insectivorous plant is a plant that consumes insects. They are more commonly known as carnivorous plants. Example- pitcher plant
I do believe it is possible for a plant to be parasitic and carnivorous.
5) a) symbiosis
b)This is a symbiotic relationship where both of them benefit each other