OnlineCBT
Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Practice questions & answers
Find a question, read its answer and explanation, then practise related questions.
Biology SEXUAL REPRODUCTION IN FLOWERING PLANTS · Clear filters
102 questions
Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Which of the following plants came into India as a contaminant with imported wheat and has become ubiquitous in occurrence, causing severe pollen allergy?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
What is the ploidy level of the cells of the nucellus, megaspore mother cell, functional megaspore, and female gametophyte, respectively?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Germ pores on the pollen grain wall are apertures where:
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
In over 60 per cent of angiosperms, pollen grains are shed at a 2-celled stage. What are these two cells?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Identify the correct set of adaptations observed in wind-pollinated flowers: (a) Enormous pollen production (b) Sticky and heavy pollen grains (c) Well-exposed stamens (d) Large and feathery stigma (e) Numerous ovules in each ovary (f) Flowers packed into inflorescence
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
During maturation of a seed, what is the typical moisture content percentage by mass retained when the embryo enters a state of dormancy?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Match the following columns and select the correct choice: Column IColumn II AAutogamyITransfer of pollen to a different plant bringing genetic variation BGeitonogamyIIInvariably observed in cleistogamous flowers CXenogamyIIIFunctionally cross-pollination, genetically autogamous DCleistogamyIVPollination within the same flower
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
In the plant shown in the diagram producing two types of flowers (chasmogamous and cleistogamous), which of the following is true regarding the flowers labelled at the base (underground)?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): Pollen grains can be well preserved as fossils for millions of years. Reason (R): The outer wall layer exine is made of sporopollenin, which is impervious to strong acids, alkali, and high temperatures, and no known enzyme degrades it. In the light of the above statements, choose the correct answer:
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Refer to the diagrammatic representation of the L.S. of a flower given below: Which of the following correctly pairs the female reproductive parts labelled in the flower?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
In the most common type of endosperm development in angiosperms, the primary endosperm nucleus (PEN) undergoes repeated nuclear divisions. With reference to this, which of the following statements correctly distinguishes the components of a tender coconut?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
What is the primary role of the micropyle in a mature, dry angiospermic seed during the process of germination?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Match List-I with List-II regarding the structure of pollen grain: List-I A. Exine B. Intine C. Germ pore D. Vegetative cell List-II I. Pectocellulose continuous layer II. Sporopollenin-deficient aperture III. Sporopollenin-rich patterned outer wall IV. Large cell with abundant food reserve Choose the correct option:
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Match the following columns and select the correct choice: Column IColumn II AMulticarpellary syncarpous pistilIMichelia BMulticarpellary apocarpous gynoeciumIIPapaver CSingle ovule per ovaryIIIPapaya DMany ovules per ovaryIVMango
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Which of the following wall layers of a microsporangium is innermost, possesses dense cytoplasm, and typically has cells with more than one nucleus to nourish developing pollen grains?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Match the following columns and select the correct choice: Column IColumn II ACorn cobISurface water pollination by long stalk BVallisneriaIIStigma and style waving in wind to trap pollens CZosteraIIIFlowers emerge above water level; pollinated by insects/wind DWater lilyIVLong ribbon-like pollens released submerged in water
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Consider the following statements regarding the structure of a typical stamen and anther: (a) The proximal end of the filament is attached to the thalamus or the petal of the flower. (b) A typical angiosperm anther is dithecous and bilobed. (c) The anther is a tetragonal structure consisting of two microsporangia, one in each lobe. (d) The microsporangia develop further and become pollen sacs extending longitudinally through the anther. Which of the above statements are correct?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Consider the following statements regarding pollination: Statement I: Complete autogamy is common in normal open chasmogamous flowers. Statement II: Xenogamy is the only type of pollination that brings genetically different types of pollen grains to the stigma. Choose the correct option:
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
In the diagrammatic representation of a mature embryo sac (c), which cellular structure is situated at the micropylar end to guide the entry of pollen tubes?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Match List I with List II regarding structures found in grass embryo: List I A. Scutellum B. Coleorrhiza C. Coleoptile D. Epiblast List II I. Hollow foliar structure enclosing shoot apex and leaf primordia II. Undifferentiated sheath enclosing radicle and root cap III. Single lateral cotyledon IV. Remnant of second cotyledon Choose the correct answer from the options given below:
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): In angiosperms, seed formation is more dependable than in bryophytes and pteridophytes. Reason (R): In angiosperms, reproductive processes such as pollination and fertilisation are independent of water. In light of the above statements, choose the most appropriate answer:
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
During megasporogenesis, a single megaspore mother cell (MMC) differentiates in which region of the nucellus?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
