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.
| 851. |
The wheat grain/maize grain has an embryo with one, large, shield shaped cotyledon known as:A. epiblastB. coleorrhizaC. scutellumD. coleoptile |
|
Answer» Correct Answer - B The grain of wheat, maize or rice is a caryopsis. The embryo in such grains lies laterally near the base of the grain. The embryo consists of an upper large, shield shaped cotyledon known as scutellum. The scutellum is closely pressed against the endosperm and helps in the translocation of nutrients from endosperm to the growing embryo at the time of germination and seedling growth. |
|
| 852. |
Male gametophyte in angiosperms produces:A. Single sperm and a vegetative cellB. Singe sperm and two vegetative cellsC. Three spermsD. Two sperms and a vegetative cell |
|
Answer» Correct Answer - D Male gametophyte in angiosperms produces two sperms and a vegetative cell. |
|
| 853. |
Male gametophyte in angiosperms produces:A. two sperms and a vegetative cellB. single sperm and a vegetative cellC. single sperm and two vegetative cellsD. three sperms |
|
Answer» Correct Answer - A Pollen grain or male gametophyte in angiosperms contain one generative cell. The generative cell further divides mitotically to form two male gametes (sperms). So, a mature male gametophyte in angiosperms contains two sperms and one vegetative cell. |
|
| 854. |
Male gametophyte in angiosperms produces:A. Single sperm and a vegetative cellB. Single sperm and two vegetative cellsC. Three spermsD. Two sperms and a vegetative cell |
| Answer» Correct Answer - D | |
| 855. |
Male gametophyte in angiosperms produces:A. three spermsB. two sperms and a vegetative cellC. single sperm and a vegetative cellD. |
| Answer» Correct Answer - B | |
| 856. |
Male gametophyte in angiosperms produces:A. Three spermsB. Two sperms and a vegetative cellsC. single sperm and a vegetative cellD. Single sperm and two vegetative cells. |
| Answer» Correct Answer - B | |
| 857. |
Coconut water from a tender coconut is:A. Degenerated nucellusB. Immature embryoC. Free nuclear endospermD. Innermost layers of the seed coat |
| Answer» Correct Answer - C | |
| 858. |
What is the direction of micropyle in anatropous ovule?A. upwardB. downardC. rightD. left |
| Answer» Correct Answer - B | |
| 859. |
Hilum is the region through which ovule attached with funiculus |
| Answer» Correct Answer - True | |
| 860. |
A: Anatropous ovule is resupinate ovule R: The body of ovule is completely bent with hilum close to micropyalr endA. if both assetion A reason are ture and the reason is the correct explanation of the assertion then markB. if both assertion & reason are ture and the reason is not the correct explanation of the assertin then markC. if assertion is true statement but reason is false then markD. if both assertion and reason are flase statements then mark |
| Answer» Correct Answer - A | |
| 861. |
At the time of entering embryo sac the pollen tube containsA. two male gametesB. two male nucleiC. four male gametesD. three male gametes |
| Answer» Correct Answer - A | |
| 862. |
Ovule is straight with funiculus, embryo sac, chalaza and micropyle lying on one straight line. It isA. orthotropousB. anatropousC. campylotropousD. amphitropous |
|
Answer» Correct Answer - A Orthotropous or atropous is the erect ovule in which the body of ovule lies straight and upright over the funicle. Hilum, chalaza and micropyle occur on one straight line, e.g. family-Polygonaceae and Piperaceae. |
|
| 863. |
When ovule is straight with funiculus, embryo sac, chalaza and micropyle lying iin a straight vertical line, it is known asA. orthotropousB. anatropousC. campylotropousD. amphitropous |
| Answer» Correct Answer - A | |
| 864. |
A: More than one pollen tubes can enter an embryo sac R: Double fertization can occur by contributin of gametes from different pollensA. if both assetion A reason are ture and the reason is the correct explanation of the assertion then markB. if both assertion & reason are ture and the reason is not the correct explanation of the assertin then markC. if assertion is true statement but reason is false then markD. if both assertion and reason are flase statements then mark |
| Answer» Correct Answer - B | |
| 865. |
Entry of pollen tube through micropyte while reaching the embryo sac is calledA. chalazogamyB. mesogamyC. prorogamyD. pseudogamy |
| Answer» Correct Answer - C | |
| 866. |
Entry of pollen tube in to the embryo sac is under ___________ guidanceA. chemotorpicB. chemotaclic chemotiacticC. phototropicD. thigmotropic |
| Answer» Correct Answer - A | |
| 867. |
Which one of the following represents an ovule, where the embryo sac becomes horse- shoe shaped and the funiculus and micropyle are close to each other -A. circinotropousB. anatropousC. amphitorpousD. atropous |
| Answer» Correct Answer - C | |
| 868. |
Through which cell of the embryo sac does the pollen tube enter the embryo sac?A. Egg cellB. central cellC. persistanvce syergidD. degenerated synergid |
| Answer» Correct Answer - D | |
| 869. |
In a type of apomixis known as adventure embryony embryos develop directly from theA. Nucellus or integumentsB. ZygoteC. synergids or antipodals in an embryo sacD. Accessory embryo sacs in the ovule. |
| Answer» Correct Answer - A | |
| 870. |
In a type of apomixis known as adventure embryony embryos develop directly from theA. nucellus or integumentsB. zygoteC. synergids or antipodals in an embryo sacD. accessory embryo sac in the ovule |
|
Answer» Correct Answer - A Apomixis does not involve gamete formation and fertilisation as found in amphimixis. Adventive embryo formation is a type of apomixis in which embryos are formed from diploid integumental or nuceller cells. |
|
| 871. |
In a type of apomixis known as adventure embryony embryos develop directly from theA. Nucellus or integumentB. ZygoteC. Synergids or antipodals of embryo sacD. Accessory embryo sacs in the ovule |
|
Answer» Correct Answer - A In a type of apomixis known as adventive embryony, embryos develop directly from nucellus or integument. |
|
| 872. |
In a type of apomixis known as adventure embryony embryos develop directly from theA. nucellus or integumentsB. synergids or antipodal s in an embryo sacC. accessory embryo sacs in the ovuleD. zygoe |
| Answer» Correct Answer - A | |
| 873. |
Assertion : In plants, apomixis is a form of asexual reporduction that minics sexual reproduction. Reason : Apomixis involves the production of seeds without the fusion of gametes.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
|
Answer» Correct Answer - a Apomixis (apo-without, mixis-fusion) is a mode of reproduction in some plants which results in the formation of seeds without gametic fusion. It is a form of asexual reproduction. In plants apomixis commonly mimics sexual some species of Asteracease and grasses. There are several methods of apomictic development in seeds. |
|
| 874. |
If the meiocyte of a maize plant contains 20 chromosomes. Write the number of chromo.-some in the endosperm nad embryo of the maize grain and give reasons in support of your answer. |
|
Answer» No. of chromosomes in endosperm=30 No. of chromosomes in embryo=20 Endosperm is formed by primary endosperm nucleus which results from triple fusion ( fusion of one male gamete with the secondary nucleus ) whereas embryo is formed from zygote which is formed by syngamy. |
|
| 875. |
Why are beehives kept in crop field during flowering period? Name any two crop fields where this is practiced. |
| Answer» Beehives are kept in crop fields during flowering period to increase pollination efficiency and increase crop yield and honey yield. Two crops are - Brassica and Sunflower. | |
| 876. |
Pollination by water takes place in:A. EichhorniaB. Nelumbo nuciferaC. HydrillaD. All of these |
| Answer» Correct Answer - C | |
| 877. |
In most of the flowering plants pollination takes place at __________ celled stageA. 2B. 3C. 4D. 5 |
| Answer» Correct Answer - A | |
| 878. |
In sausage tree (Kigelia africana) the pollination takes place byA. BatsB. BirdsC. InsectsD. Wind |
|
Answer» Correct Answer - A In Kigellia pinnata/Sausage Tree, pollination is performed by bats. |
|
| 879. |
Why are flowers of Cucumber referred to as epigynous ? |
| Answer» The female flowers of Cucumber are epigynous because ovary is inferior and other floral parts appers to arise above its level. | |
| 880. |
The microscopic pollen grains of the past are obtained as fossils. Mention the characteristic of the pollen grains that makes it happen . |
| Answer» The outer exine by pollen grain is coated with wax and sporopollenin which is hard and not easily degraded by micro-organisms. This property of exine makes pollen grain to remain entact in fossilised forms. | |
| 881. |
Milky water of green cocounut is:A. Liquid endospermB. Liquid gametophyteC. Liquid nucellusD. Liquid chalaza |
| Answer» Correct Answer - A | |
| 882. |
One of the plants bearing anemophilous flowers is (a) Vallisneria (b) Salvia (c ) Kigelia (d) Maize |
| Answer» Correct Answer - d | |
| 883. |
Milky water of green coconut fruit is itsA. Liquid gametessB. Liquid nucellusC. Liquid female gametophyteD. Liquid endosperm |
| Answer» Correct Answer - D | |
| 884. |
Milky water of green Coconut isA. liquid chalazaB. liquid nucellusC. degenerated liquid free nuclear endospermD. luquid female gametophyte |
| Answer» Correct Answer - C | |
| 885. |
Milky water of green Coconut isA. Liquid female gametophyteB. Liquid endospermC. Liquid nucellusD. Liquid chalaza |
|
Answer» Correct Answer - B Milky water in green Coconut is liquid endosperm. |
|
| 886. |
Milky water of green coconut fruit is itsA. Cell sapB. Free nuclear endospermC. Free nuclear embryonal cellsD. Stored cells |
| Answer» Correct Answer - B | |
| 887. |
Assertion. Entomophilous plants produce less pollen when compared to anemophilous plants. Reason. The wastage of pollen is reduced to the minimum in entomophilous plnats because of the directional pollination.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion .B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion .C. If Assertion is true and but the Reason is false.D. If both Assertion and Reason are false. |
| Answer» Correct Answer - B | |
| 888. |
Milky water of green coconut fruit is itsA. Liquid endospermB. SeedC. MesocarpD. Endocarp |
| Answer» Correct Answer - A | |
| 889. |
Fertilization involving carrying of male gametes by pollen tube isA. porogamyB. siphonogamyC. chalazogamyD. syngonogamy |
|
Answer» Correct Answer - B in angiosperms, the male gametes are carried by the pollen tube and such type of fertilisation or fusion of male and female gametes or syngamy is called siphonogamy. It was discovered by Strasburger (1884). |
|
| 890. |
Pollen grain is related to embryo sac asA. Sperm is to the female gametophyteB. Sperm is to the eggC. Male gametophyte is to the eggD. Male gametophyte is to the embryo sac |
| Answer» Correct Answer - D | |
| 891. |
The pollen tube usually enters the embryo sac:A. Through one of the synergidsB. By direct penetrating the eggC. Between one synergid and central cellD. By knocking anitpodal |
| Answer» Correct Answer - A | |
| 892. |
The pollen tube usually enters the embryo sac:A. between the egg cell and synergidB. by directly penetrating the eggC. between one synergid and antipodal cellD. by knocking off the antipodal cells |
| Answer» Correct Answer - A | |
| 893. |
Growth of part X is A. chemotropismB. thigmotaxisC. geotropicD. none of these |
|
Answer» Correct Answer - A The pollen tube paves its way through the solid part of the stigma and style by secreting pectinases and hydrolytic enzymes. Pollen tube travels intercellularly and chemotropically along the concentration gradient of calcium -boron-inosital sugar complex. |
|
| 894. |
During the process of fertilisation the pollen tube of the pollen grain usuallt enters the embryo sac throughA. integumentB. nucellusC. chalazaD. micropyle |
|
Answer» Correct Answer - D After arriving at the wall of the ovary, the pollen tube enters the ovule either through the micropyle or by some other route. The entrance of the pollen tube through the micropyle is the normal condition and is known as porogamy. In some cases the pollen tube enters the ovule through the chalaza (chalazogamy e.g. Casuarina), or through integuments (mesogamy e.g. Cucurbita). |
|
| 895. |
Assertion : It is possible to store pollen grains of a large number of species for years in years in liquid nitrogen `(-196^(@)C)` Reason : Such stored pollen can be used as pollen banks, similar to seed banks, in crop breeding programmes.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is falseD. If both assertion and reason are false. |
|
Answer» Correct Answer - B `**` Is is possible to store pollen grains of a large number of species for years in liquid nitrogen `(-196^(@)C)`. `**` Such stored pollen can be used as pollen banks, similar to seed banks, in crop breeding programmes. |
|
| 896. |
Assertion : The period for which pollen grains remain viable is highly variable. Reason : Viability of pollen grain depends some extent on the prevailing temperature and humidity.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is falseD. If both assertion and reason are false. |
|
Answer» Correct Answer - B `**` The period for which pollen grains remain viable is highly variable. `**` Viability of pollen grain depends some extent on the prevailing temperature and humidity. |
|
| 897. |
Assertion : Each cell of sporgenous tissue is a potential pollen mother cell (PMC) or microspore mother cell. Reason : Each cell of the sporgenous tissue is capable of giving rise to a microspore tetradA. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is falseD. If both assertion and reason are false. |
|
Answer» Correct Answer - A `**` As the the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads. `**` As each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad. Each one is a potential pollen or microspore mother cell (PMC). |
|
| 898. |
Recognise the figure and find out the correct matching. A. a-epidermis, b-endothecium, c-middle layers, d-tapetum, e-sporogenous tissue, f-connectiveB. b-epidermis, c-endothecium, d-middle layers, e-tapetum, f-sporogenous tissue, a-connectiveC. b-epidermis, c-endothecium, f-middle layers, -e-tapetum, a-sporogenous tissue, d-connectiveD. b-epidermis, c-endothecium, f-middle layers, e-tapetum, d-sporogenous tissue, a-connective |
| Answer» Correct Answer - D | |
| 899. |
Ina mature embryo sac the central cell isA. Single nucleateB. BinucleateC. Four nucleateD. Eight nucleate |
|
Answer» Correct Answer - B In mature embryo sac, the central cell is binucleate. |
|
| 900. |
Formation of liquid endosperm in coconut takes place because:A. Karyokinesis is not followed by cytokinesisB. Karyokinesis is followed by cytokinesisC. Formation of liquid endosperm is not dependent upon karyokinesis and cytokinesisD. None of the above |
|
Answer» Correct Answer - A Part of endosperm remains liquid in Coconut because karyokinesis is not followed by cytokinesis. |
|