Cuscuta is an example of
ectoparasitism
brood parasitism
predation
predation
A.
ectoparasitism
Cuscutta (Amarbel) is a total stem parasite that grows on a number of plants like - Citrus, Duranta, Zizyphus, etc. It sends a number of haustoria into the host. Xylem and phloem of haustorium make connection with sap and food channel of host.
Predation is an interaction in which member of one species capture, kill and eat up member of Endoparasite lives inside the host body.
Which one of the following organisms is correctly matched with its three characteristics?
Pea: C3 pathway, Endospermic seed, Vexillary aestivation
Tomato: Twisted aestivation, Axile placentation, Berry
Onion: Bulb, Imbricate aestivation, Axile placentation
Onion: Bulb, Imbricate aestivation, Axile placentation
How many plants in the list given below have composite fruits that develop from an inflorescence?
Walnut, poppy, radish, fig, pineapple, apple, tomato, mulberry
Four
Five
Two
Two
How many plants in the list given below have marginal placentation?
Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin
Four
Five
Six
Six
Which one of the following shows isogamy with non-flagellated gametes?
Sargassum
Ectocarpus
Ulothrix
Ulothrix
Plants with ovaries having only one or a few ovules, are generally pollinated by
Bees
Butterflies
Birds
Birds
Vexillary aestivation is characteristic of the family
Fabaceae
Asteraceae
Solanaceae
Solanaceae
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as
vexillary
imbricate
twisted
twisted
