InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
In the monocotyledonous seeds the endosperm is separated from the embryo by a distinct layer known as or The outermost proteinaceous layer of endosperm of maize grain is calledA. TestaB. Aleurone layerC. TegmenD. Scutellum |
|
Answer» Correct Answer - B In maize the outermost layer of endosperm is rich in protein and consititutes the aleurone layer |
|
| 152. |
Identify the wrong statement regarding post-fertilisation development.A. The ovary wall develops into pericarpB. The outer integument of ovule develops into temenC. The fusion necleus (triple nucleus) develops into endospermD. The ovule develops into seed |
| Answer» Correct Answer - B | |
| 153. |
Which one of the following statements is wrongA. When pollen is shed at two celled stage, double fertilization does not take placeB. Vegetative cell is larger than generative cellC. Pollen grains in some plants remain viable for monthsD. Intine is made up of cellulose and pectin |
|
Answer» Correct Answer - A In more than 60 % angiospermic plants. Pollen grains release in 2 celled stage. |
|
| 154. |
Pick out wrong statementA. Double fertilization is unique to gymnosperms and monocotyledonsB. Sequoia, a gymnosperm, is one of the tallest treeC. Phaeophyceae members possess chlorophyil a, c, carotenoids and xanthophyllsD. Moss is a gametophyte which consits of two stages namely, protonema stage and leafy stage |
| Answer» Correct Answer - A | |
| 155. |
Which one of the following statements is not trueA. Pollen grains of some plants cause severe allergies and bronchail afflictions in some peopleB. The flowers pollinated by flies and bats secrete foul odour to attract themC. Honey is made by bees by digesting pollen collected from flowersD. Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups |
| Answer» Correct Answer - C | |
| 156. |
Examine the figure given below showing entry of pollen tube into embryo sac. Identify A. B. C. D. E and F respectively A. `{:(" A B C D E F "),("Obturator Synergid Polar nuclei Male gemetes Vegatative nucleus Central cell"):}`B. `{:(" A B C D E F "),(" Egg apparatus Synergid Polar nuclei Male gemetes Vegatative nucleus Central cell"):}`C. `{:(" A B C D E F "),(" filliform apparatus Synergid Polar nuclei Vegetative nucleus Male gametes Central cell"):}`D. `{:(" A B C D E F "),(" filliform apparatus Synergid Polar nuclei Male gametes Vegetative Nucleus Central cell"):}` |
| Answer» Correct Answer - D | |
| 157. |
Growth of pollen tube towards embryo sac isA. GeotropismB. ThigmotaxisC. chemotaxisD. Phototaxis |
|
Answer» Correct Answer - C Growth of pollen tube towards the embryo sac is chemotaxis because this movement is induced by chemicals like auxin hormone and carbohydrate. |
|
| 158. |
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube becauseA. Laser beam stimulates pollen germination and pollen tube growthB. The laser beam does not damage the region from which pollen tube emergiesC. The contents of killed generative cell permit germination and pollen tube growthD. The vegetative cell has not been damaged |
| Answer» Correct Answer - D | |
| 159. |
During the process of fertilisation the pollen tube of the pollen grain usuallt enters the embryo sac throughA. Egg cellB. central cellC. Persistant synergidD. Degenerated synergid |
|
Answer» Correct Answer - D Synergids are short lived (one of them degenerated long before fertilization and second after entry of pollen tube into embryo sac) |
|