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Consider the following statements regarding the embryological features of Exocarpus and choose the correct answer:
1. The development of anther is normal
2. Four celled pollen grains are shed at the time of dehiscence of anther
3. Development of 8 nucleate Polygonum type of embryo sac takes place
4. The seed is not 'naked'

Consider the following statements regarding the embryological features of Exocarpus and choose the correct answer:
1. The development of anther is normal
2. Four celled pollen grains are shed at the time of dehiscence of anther
3. Development of 8 nucleate Polygonum type of embryo sac takes place
4. The seed is not 'naked' Correct Answer Only 1, 3 and 4 are true

Related Questions

Consider the following statements and choose the correct answer:
1. In angiosperms the pollination consists of transference of the pollen grains from the anther to the stigma either by self-pollination or by cross-pollination
2. Pollen grain is shed from the pollen sac in the two-celled stage
3. The exine of each microspore grows out into a tube, called the pollen tube
4. The growth of pollen tube is stimulated by sugary substances secreted by the stigma
Consider the following statements and choose the correct answer:
1. In Oenothera type of monosporic embryo sac, the embryo develops from the micropylar megaspore of the tetrad
2. Antipodal cells are altogether absent in Oenothera type
3. The genus Trapa forms an 8-nucleate embryo sac of the Polygonurn type
4. Oenothera type of embryo sac development has been found to be a characteristic feature of the entire family Onagraceae
Consider the following statements regarding recurrent type apomixis and choose the correct answer:
1. There is meiosis during the formation of megaspore
2. The embryo sac is diploid in nature
3. The embryo sac never develops from a cell of the archesporium
4. The development of embryo from a cell of an embryo sac other than egg is known as apospory
Consider the following statements regarding the germination of pollen grain and choose the correct answer:
1. The content of the pollen is a true male gametophyte
2. The pollen tube comes out due to the protrusion of the exine through the germ pore
3. When the pollen grain has germinated, the pollen tube penetrates the stigma through the stigmatic papillae
4. Some stigmas have a continuous cuticle in which pollen tubes penetrate by enzyme action
Which of the following phrases (i),(ii), and (iii) given below each sentenceshould replace the phrase printed in boldletters to make the sentence grammaticallycorrect? Choose the best option among thefive given alternatives that reflect the correctuse of phrase in the context of thegrammatically correct sentence. If thesentence is correct as it is, mark (E) i.e., "Nocorrection required" as the answer.
The trees shed his leaves every timeautumn approaches but a healthy treealways gets its leaves back in the spring,which explains the point that fighting spirit isenough to keep one afloat.
i. Has shed their leaves every time autumnapproaches
ii. shed their leaves every time autumnapproaches
iii. shed its leaves every time autumnapproaches
Consider the following statements regarding Xenia and choose the correct answer:
1. If a white variety (yy) is pollinated with pollen from a yellow variety (YY), one of the male gametes (Y) will unite with the egg (y) to produce a hybrid embryo (Yy) which will act as a heterozygote for yellow endosperm in the next generation
2. The second male gamete (Y) will unite with the two polar nuclei (y, y) and produces the primary endosperm nucleus (Yyy) which is triploid
3. If a yellow endosperm variety (YY) is crossed with pollen from a white grained variety, the grains produced are white like the pollen parent
Study the following table: Group Parts of stamen Parts of pistil A Anther, filament Ovary, stigma, style B Anther, petal Anther, sepal, stigma C Stigma filament Style, stigma, sepal D Style, ovary Anther, filament, ovary   The group in which the parts of stamen and parts of pistil are correctly shown is
Identify the correct sequence of seed germination from the steps given below: (a) After the leaves appear, then the young plants can make their own food. (b) Seed absorbs water through a hole. This softens the seed coat and it ruptures. (c) A soft shoot emerges from the seed and grows upwards. (d) During this stage, the baby plant lives on the food stored in the seed. (e) A small root emerges from the seed which grows downwards.
Consider the following statements regarding poloyembryony and choose the correct answer:
1. False polyembryony includes the development of two or more embryo sacs within the Same nucellus, and the embryos are derived from different embryo sacs
2. In cleavage polyembryony, the zygote instead of giving rise to one embryo produces embryos by cleavage
3. According to Jeffrey (1895), in Erythronium americanum the "embryogenic mass" forms two or three embryos
Polygonum type of embryo sac/female gametophyte of angiosperms is