At which stage of spermatogenesis sperm acquire their whole structural maturity and they contain a haploid nucleus & other organs-

At which stage of spermatogenesis sperm acquire their whole structural maturity and they contain a haploid nucleus & other organs-
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At which stage of spermatogenesis sperm acquire their whole structural maturity and they contain a ... C. Multiplication phase D. Maturation phase
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Spermatogenesis and sperm differentiation are under the control of

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Which of the following approaches does not give the defined action of contraceptive? (a) Hormonal contraceptives Prevent/retard entry of sperms, prevent ovulation and fertilisation (b) Vasectomy Prevents spermatogenesis (c) Barrier methods Prevent fertilisation (d) Intra uterine devices Increase phagocytosis of sperms, suppress sperm motility and fertilising capacity of sperms

Description : Which of the following approaches does not give the defined action of contraceptive? (a) Hormonal contraceptives Prevent/retard entry of sperms, prevent ovulation and fertilisation (b) ... devices Increase phagocytosis of sperms, suppress sperm motility and fertilising capacity of sperms

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What mode of cell division sperm cells to be formed in the haploid male bee?

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Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum . Reason : Spermatogenesis process requires les

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Acrosome formation in spermatogenesis occurs in which stage ?

Description : Acrosome formation in spermatogenesis occurs in which stage ?

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102.Perisperm differs from endosperm in (a) being a diploid tissue (b) its formation by fusion of secondary nucleus with several sperms (c) being a haploid tissue (d) having no reserve food.

Description : 102.Perisperm differs from endosperm in (a) being a diploid tissue (b) its formation by fusion of secondary nucleus with several sperms (c) being a haploid tissue (d) having no reserve food.

Last Answer : (a) being a diploid tissue

Which of the following pair have haploid structures? (a) Nucellus and antipodal cells (b) Antipodal cells and egg cell (c) Antipodal cells and megaspore mother cell (d) Nucellus and primary endosperm nucleus

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Which one of the following pairs of plant structures has haploid number of chromosomes? (a) Nucellus and antipodal cells (b) Egg nucleus and secondary nucleus (c) Megaspore mother cell and antipodal cells (d) Egg cell and antipodal cells

Description : Which one of the following pairs of plant structures has haploid number of chromosomes? (a) Nucellus and antipodal cells (b) Egg nucleus and secondary nucleus (c) Megaspore mother cell and antipodal cells (d) Egg cell and antipodal cells

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To obtain haploid plants, we culture _________ e. Entire anther f. Nucleus g. Embryo h. Apical bud

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Perisperm differs from endosperm in :a)Being a diploid tissueb)Its formation by fusion of secondary nucleus with several sperms c)Being a haploid tissued)Having no reserve food

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In a cell haploid chromosome number is 15. What number is found in Pollen grain, Zygote, Primary endosperm nucleus and Colchicine treated zygote.

Description : In a cell haploid chromosome number is 15. What number is found in Pollen grain, Zygote, Primary endosperm nucleus and Colchicine treated zygote. 

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Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes. b) Huntingon Disease Huntington disease is one example of a germ-line mutation. c) Duchenne Muscular Dystrophy Duchenne muscular dystrophy, an inherited form of muscular dystrophy, is an example of a genetic caused by structural gene mutations. d) Marphan Syndrome Marphan Syndrome is a genetic condition that may occur in a single family member as a result of spontaneous mutation.

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When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as

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n which stage or phase of Product Life Cycle, Sales Volume is at Peak Point a) Growth b) Saturation c) Maturity d) Decline

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16) If L'Oreal management feels that the firm's new cosmetic line is in too few retail outlets and begins to seek additional speciality and department stores to carry the line, it is probably is in which stage of the product's life cycle? A)Introduction B)Growth C)Maturity D)Decline

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The stage of start up of an industry . A. Pioneering B. Rapid growth C. Maturity D. Decline

Description : The stage of start up of an industry . A. Pioneering B. Rapid growth C. Maturity D. Decline  

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Which of the following learner characteristics are likely to influence the effectiveness of teaching aids and evaluation systems to ensure positive results? (A) Learner’s family background, age and habitation. (B) Learner’s parentage, socio-economic background and performance in learning of the concerned subject. (C) Learner’s stage of development, social background and personal interests. (D) Learner’s maturity level, academic perfor mance level and motivational dispositions.

Description : Which of the following learner characteristics are likely to influence the effectiveness of teaching aids and evaluation systems to ensure positive results? (A) Learner's family background, age and ... . (D) Learner's maturity level, academic perfor mance level and motivational dispositions. 

Last Answer : (D) Learner’s maturity level, academic perfor mance level and motivational dispositions.

The animals in which cells are organized into structural and functional units called as tissues, organs, and organ system are grouped under which subk

Description : The animals in which cells are organized into structural and functional units called as tissues, organs, and organ system are grouped under which subk

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In remedy reaction, where the aggravation is quick, short and strong with rapid improvement of patient, inference is all except Options: 1) There are no structural changes 2) Disease is of superficial nature 3) Disease has not severely affected vital organs 4) Changes are comparable to changes in deeper organs

Description : In remedy reaction, where the aggravation is quick, short and strong with rapid improvement of patient, inference is all except Options: 1) There are no structural changes 2) Disease is of ... ) Disease has not severely affected vital organs 4) Changes are comparable to changes in deeper organs

Last Answer : Correct Answer: 4) Changes are comparable to changes in deeper organs

What is the process of Spermatogenesis & Oogenesis -Biology

Description : What is the process of Spermatogenesis & Oogenesis -Biology

Last Answer : answer:

On fertilization of egg nucleus with sperm nucleus

Description : On fertilization of egg nucleus with sperm nucleus

Last Answer : On fertilization of egg nucleus with sperm nucleus A. Second maturation is completed B. Embryo is ... body is formed D. First maturation is completed.

Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . Reason : Diploid nuclear status of organism is essen

Description : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . Reason : Diploid nuclear status of organism is essen

Last Answer : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . ... . D. If both Assertion & Reason are False.

Every multicellular organism, be it a microscopic alga, a banyan tree or a human being, starts as a single cell called a/an (a) Egg (b) Sperm (c) Nucleus (d) Gene

Description : Every multicellular organism, be it a microscopic alga, a banyan tree or a human being, starts as a single cell called a/an (a) Egg (b) Sperm (c) Nucleus (d) Gene

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In an egg, the type of cleavage is determined by (a) the amount and distribution of yolk (b) the number of egg membranes (c) the shape and size of the sperm (d) the size and location of the nucleus.

Description : In an egg, the type of cleavage is determined by (a) the amount and distribution of yolk (b) the number of egg membranes (c) the shape and size of the sperm (d) the size and location of the nucleus.

Last Answer : (a) the amount and distribution of yolk

The second maturation division of the mammalian ovum occurs (a) shortly after ovulation before the ovum makes entry into the fallopian tube (b) until after the ovum has been penetrated by a sperm (c) until the nucleus of the sperm has fused with that of the ovum (d) in the Graafian follicle following the first maturation division.

Description : The second maturation division of the mammalian ovum occurs (a) shortly after ovulation before the ovum makes entry into the fallopian tube (b) until after the ovum has been penetrated by a sperm ... with that of the ovum (d) in the Graafian follicle following the first maturation division.

Last Answer : (b) until after the ovum has been penetrated by a sperm

The middle piece of the sperm contains (a) proteins (b) mitochondria (c) centriole (d) nucleus.

Description : The middle piece of the sperm contains (a) proteins (b) mitochondria (c) centriole (d) nucleus.

Last Answer : (b) mitochondria

Is NOT a structural component of the nucleus?

Description : Is NOT a structural component of the nucleus?

Last Answer : Need answer