Description : In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores
Last Answer : Ans. ((d))
Description : In grasses what happens in microspore mother cell for the formation of mature pollen grains? (a) One meiotic and two mitotic divisions (b) One meiotic and one mitotic divisions (c) One meiotic division (d) One mitotic division
Last Answer : (b) One meiotic and one mitotic divisions
Description : Number of meiotic divisions required to produce 200/400 seeds of pea would be (a) 200/400 (b) 400/800 (c) 300/600 (d) 250/500
Last Answer : (d) 250/500.
Description : In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains? (a) 75 (b) 100 (c) 25 (d) 50
Last Answer : (c) 25
Description : How many meiotic divisions are required during the formation of 500 zzygotes, if in males one meiotic division result in formation of four male gamete
Last Answer : How many meiotic divisions are required during the formation of 500 zzygotes, if in males one meiotic division ... A. 625 B. 500 C. 1000 D. 2500
Description : Total number of meiotic divisions required for forming 100 zygotes/100 grains of wheat is (a) 100 (b) 75 (c) 125 (d) 50
Last Answer : (c) 125
Description : 1) How many microspore mother cells are required for the formation of 100 seeds. (a) 25 (b) 50 (c)100 (d) None of these
Last Answer : (a) 25
Description : Offsets are produced by (a) meiotic divisions (b) mitotic divisions (c) parthenocarpy (d) parthenogenesis
Last Answer : b) mitotic divisions
Description : Offsets are produced by (1) Meiotic divisions (2) Mitotic divisions (3) Parthenocarpy (4) Parthenogenesis
Last Answer : (2) Mitotic divisions
Description : What is a microspore mother cell? -Biology
Last Answer : answer:
Description : Where is the microspore mother cell located? -Biology
Description : Male gametophyte of angiosperms is shed at (a) four celled pollen grain (b) three celled pollen grain (c) microspore mother cell (d) anther.
Last Answer : b) three celled pollen grain
Description : Which one of the following is surrounded by a callose wall? (a) Male gamete (b) Egg (c) Pollen grain (d) Microspore mother cell
Last Answer : (d) Microspore mother cell
Description : Male gametes in angiosperms are formed by the division of (a) generative cell (b) vegetative cell (c) microspore mother cell (d) microspore.
Last Answer : (a) generative cell
Description : Megaspores are produced from the megaspore mother cells after (a) mitotic division (b) formation of thick wall (c) differentiation (d) meiotic division.
Last Answer : d) meiotic division.
Description : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce.
Last Answer : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce. A. ... Spermatogonia `rarr` Sperms D. Spermatogonia
Description : Which of the following statements is not true about somatic embryogenesis? (a) The pattern of development of a somatic embryo is comparable to that of a zygotic embryo. (b) Somatic embryos can develop from ... an auxin such as 2, 4-D. (d) A somatic embryo develops from a somatic cell.
Last Answer : (b) Somatic embryos can develop from microspores.
Description : Which one of the following is NOT an event of sporulation? a. Symmetrical cell divisions b. Mother cell disintegration c. DNA replication d. Prespore engulfment by the mother cell
Last Answer : a. Symmetrical cell divisions
Description : 4.A mature embryosac in angiosperm is formed from a megaspore mother cell by ------- cell divisions. (a) one mitosis and two meiosis, b)two mitosis and one meiosis, c)three mitosis and two meiosis d)three mitosis and one meiosis)
Last Answer : d)three mitosis and one meiosis)
Description : Explain the Functional divisions of cortex?
Last Answer : Researchers who study the functions of the cortex divide it into three functional categories of regions, or areas. One consists of the primary sensory areas, which receive signals from the sensory ... and are involved in the complex process that we call perception, thought, and decision making.
Description : Meiosis is best observed in dividing (a) cells of apical meristem (b) cells of lateral meristem (c) microspores and anther wall (d) microsporocytes.
Last Answer : (d) microsporocytes.
Description : In angiosperm, all the four microspores of tetrad are covered by a layer which is formed by (a) pectocellulose (b) callose (c) cellulose (d) sporopollenin
Last Answer : (a) pectocellulose
Description : Which one of the following statements is correct? (a) Endothecium produces the microspores. (b) Tapetum nourishes the developing pollen. (c) Hard outer layer of pollen is called intine. (d) Sporogenous tissue is haploid
Last Answer : (b) Tapetum nourishes the developing pollen.
Description : 21. Asexual microscopic motile reproductive structures are called ... b) Microspores b) Zoospores c) Conidiospores d) Aplanospores
Last Answer : d) Aplanospores
Description : 1. Asexual microscopic motile reproductive structures are called ... a) Microspores b) Zoospores c) Conidiospores d) Aplanospores
Description : Which one of the following statements is correct?a)Endothecium produces the microspores b)Tapetum nourishes the developing pollenc)Hard outer layer of pollen is called intined)Sporogenous tissue is haploid
Last Answer : Tapetum nourishes the developing pollen
Description : What does a microspore develop into? -Biology
Description : Difference between microspore and megaspore? -Biology
Description : What are their similarity between Microspore and Megaspore? -Biology
Description : Male gametophyte of angiosperms/monocots is (a) microsporangium (b) nucellus (c) microspore (d) stamen
Last Answer : (c) microspore
Description : Microsporogenesis is the formation of : a) Microspore b) Megaspore c) Egg d) Embryo sac
Last Answer : Ans : a) Microspore
Description : (i) Mention the event that induces the completion of the meiotic division of the secondary oocyte. (ii) Trace the journey of the ovum from the ovary, its fertilisation and further development until the implantation of the embryo. -Biology
Last Answer : (i)Secondary oocyte completes meiosis-ll only when a sperm enters its cytoplasm. It forms a larger cell, the ootid and a small cell, the second polar body. (ii)The secondary oocyte is ... and inner cell mass.The trophoblast attacheds to endometrium (implantation) and blastocyst gets embedded in it.
Description : what is difference between mitotic and meiotic interphase ? -Biology
Description : Variations during mutations of meiotic recombinations are
Last Answer : Variations during mutations of meiotic recombinations are A. Random and directionless B. Randonm and ... and small D. Randonm, small adn directional
Description : Each secondary spermatocyte after second meiotic division produces
Last Answer : Each secondary spermatocyte after second meiotic division produces A. Four haploid spermatids B. ... haploid spermatids D. Two diploid spermatids.
Description : In humans the oocyte is maintained in a state of meiotic arrest by the secretion of
Last Answer : In humans the oocyte is maintained in a state of meiotic arrest by the secretion of A. Granulosa cells B. Zona pellucida C. Cumulus oophorus D. Theca.
Description : In humans, at the end of the first meiotic division, the male germ cells differentiate into the
Last Answer : In humans, at the end of the first meiotic division, the male germ cells ... Spermatozonia C. Primary spermatocytes D. Secondary spermatocytes
Description : First meiotic division during Oogenesis occurs in:
Last Answer : First meiotic division during Oogenesis occurs in: A. First polar body B. Second polar body C. Primary oocytes D. Secondary polar body
Description : Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain associated at their centrometres. Or In whic
Last Answer : Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain ... II C. Metaphase I D. Metaphase II
Description : Neurospora is used as genetic material because (a) It has short life cycle of 10 days (b) The product of single meiosis can be easily analysed (c) Meiotic products are linearly arranged in the form of ordered tetrads (d) Is a diploid fungus
Last Answer : Ans:(a)
Description : Crossing over is followed by a. Meiotic division I b. Meiotic division II, c. Both d. None
Last Answer : Both
Description : n humans, at the end of the first meiotic division, the male germ cells differentiate into the (a) spermatids (b) spermatogonia (c) primary spermatocytes (d) secondary spermatocytes.
Last Answer : (d) secondary spermatocytes.
Description : The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic (a) B- Corpus luteum - Secretes progesterone (b) A- ... Secretes estrogen (d) A- Primary oocyte - It is in the prophase I of the meiotic division
Last Answer : (a) B- Corpus luteum - Secretes progesterone
Description : Meiotic division of the secondary oocyte is completed (a) prior to ovulation (b) at the time of copulation (c) after zygote formation (d) at the time of fusion of a sperm with an ovum.
Last Answer : (d) at the time of fusion of a sperm with an ovum.
Description : Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres. (a) Metaphase I (b) Metaphase II (c) Anaphase I (d) Anaphase I
Last Answer : (c) Anaphase I
Description : 26. Anaphase in second meiotic division is characterized by: (a) Separation of non-homologous chromosomes (b) Separation of homologous chromosomes (c) Separation of chromatids (d) All of them
Last Answer : Answer: c Separation of chromatids
Description : All the following conditions produce a real or functional deficiency of vitamin K except (A) Prolonged oral, broad spectrum antibiotic therapy (B) Total lack of red meat in the diet (C) The total lack of green leafy vegetables in the diet (D) Being a new born infant
Last Answer : Answer : B
Description : Production function refers to the functional relationship between input and _______. (1) product (2) produce (3) output (4) service
Last Answer : (3) output Explanation: The Production function expresses a functional relationship amidst quantities of raw materials and goods. It is the name given to the relationship between rates of input of productive services and the rate of output of product.
Description : In autosomal recessive inheritance: a. the rarer the trait the higher the possibility of marriages within the same family b. most recessive gene defects cause problem through failure to produce functional protein c. both males and females are affected equally severely d. all above
Last Answer : all above