Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages? -Biology

Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages? -Biology
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How is the constancy maintained in these three stages? Answer. Yes, zygote, embryonic cell and adult of a particular organism always constant have constant chromosome number. Sexual reproduction includes gamete formation through meiosis and fertilization.
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A steady state within the body is termed a) Homeostasis. When a change occurs that causes a body function to deviate from its stable range, processes are initiated to restore and maintain the steady state or homeostasis. b) Constancy. Constancy refers to the balanced internal state of the human body maintained by physiologic and biochemical processes. c) Adaptation. Adaptation refers to a constant, ongoing process that requires change in structure, function, or behavior so that the person is better suited to the environment. d) Stress. Stress refers to a state produced by a change in the environment that is perceived as challenging, threatening, or damaging to the person’s dynamic balance or equilibrium.

Description : A steady state within the body is termed a) Homeostasis. When a change occurs that causes a body function to deviate from its stable range, processes are initiated to restore and maintain ... that is perceived as challenging, threatening, or damaging to the person's dynamic balance or equilibrium.

Last Answer : a) Homeostasis. When a change occurs that causes a body function to deviate from its stable range, processes are initiated to restore and maintain the steady state or homeostasis.

What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg? -Biology

Description : What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg? -Biology

Last Answer : The ratio of chromosome number between egg· and its zygote is 1 : 2. An egg is a female gamete, it has haploid number of chromosomes. ... Sperms and eggs are genetically different in terms ... chromosome. The sperm contain either X or Y-chromosome whereas an egg will always have an X-chromosome.

After the union of sperm and egg, the single-celled zygote develops into a multicellular organism with specialized cells by the processes of?

Description : After the union of sperm and egg, the single-celled zygote develops into a multicellular organism with specialized cells by the processes of?

Last Answer : mitosis and diffrentiation

Draw a diagrammatic sectional view of human ovary showing different stages of oogenesis along with corpus luteum. (ii) Where is morula formed in human? Explain the process of its development from zygote. -Biology

Description : Draw a diagrammatic sectional view of human ovary showing different stages of oogenesis along with corpus luteum. (ii) Where is morula formed in human? Explain the process of its development from zygote. -Biology

Last Answer : (i) Sectional view of human ovary. (ii) Morula is formed in the (a)Isthmus of the oviduct (Fallopiantube). (b)The zygote undergoes mitotic divisions in quick succession called cleavage, forming 2, 4 ... 8-16 blastomeres is called a morula and the inner cell mass gets ready to form the embryo proper.

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. 

Last Answer : Ans: 15 in pollen grain, 30 in zygote, 45 in Primary Endosperm nucleus and 60 in colchicine treated zygote.

What are the normal chromosome numbers of a sperm egg and zygote respectively?

Description : What are the normal chromosome numbers of a sperm egg and zygote respectively?

Last Answer : monoploid, monoploid and diploid

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution? (a) Overproduction, variations, constancy of population size, natural selection (b) Variations, constancy of population size, overproduction, natural selection (c) Overproduction, constancy of population size, variations, natural selection (d) Variations, natural selection, overproduction, constancy of population size

Description : Which one of the following sequences was proposed by Darwin and Wallace for organic evolution? (a) Overproduction, variations, constancy of population size, natural selection (b) ... variations, natural selection (d) Variations, natural selection, overproduction, constancy of population size

Last Answer : (b) Sea-horse

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.

Description : 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 ... genetic condition that may occur in a single family member as a result of spontaneous mutation.

Last Answer : 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.

Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome. Reason:- Durring different stages of ce

Description : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome. Reason:- Durring different stages of ce

Last Answer : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each ... D. If both Assertion & Reason are false.

A potentiometer wire is `100 cm` long hand a constant potential difference is maintained across it. Two cells are connected in series first to support

Description : A potentiometer wire is `100 cm` long hand a constant potential difference is maintained across it. Two cells are connected in series first to support

Last Answer : A potentiometer wire is `100 cm` long hand a constant potential difference is maintained across it. Two cells are connected ... C. `3 : 2` D. `5 : 1`

What substance needs to be maintained to give cells a constant supply of energy?

Description : What substance needs to be maintained to give cells a constant supply of energy?

Last Answer : oxygen and glucose

What substance needs to be maintained to give cells a constant supply of energy?

Description : What substance needs to be maintained to give cells a constant supply of energy?

Last Answer : oxygen and glucose

What is A cell or organism having half of the diploid chromosome number?

Description : What is A cell or organism having half of the diploid chromosome number?

Last Answer : Need answer

A selectable marker is used to (a) help in eliminating the non-transformants, so that the transformants can be regenerated (b) identify the gene for a desired trait in an alien organism (c) select a suitable vector for transformation in a specific crop (d) mark a gene on a chromosome for isolation using restriction enzyme.

Description : A selectable marker is used to (a) help in eliminating the non-transformants, so that the transformants can be regenerated (b) identify the gene for a desired trait in an alien organism (c) ... in a specific crop (d) mark a gene on a chromosome for isolation using restriction enzyme.

Last Answer : (a) help in eliminating the non-transformants, so that the transformants can be regenerated

What term is used to describe an organism lacking one entire chromosome?

Description : What term is used to describe an organism lacking one entire chromosome?

Last Answer : ANSWER: A MONOSOMY

Identical twins are born when (a) Two sperms fertilise one ovum (b) Two sperms fertilise two ovums simultaneously (c) Open sperm fertilizes the ovum and zygote divides into two separate cells developing independently (d) One sperm fertilises two ovums

Description : Identical twins are born when (a) Two sperms fertilise one ovum (b) Two sperms fertilise two ovums simultaneously (c) Open sperm fertilizes the ovum and zygote divides into two separate cells developing independently (d) One sperm fertilises two ovums

Last Answer : Ans:(c)

From the zygote, pluricellular organisms are formed by serial mitosis. Would this formation be possible if each cell made by mitosis had an identical life in relation to its antecedent cells? How did evolution solve that problem?

Description : From the zygote, pluricellular organisms are formed by serial mitosis. Would this formation be possible if each cell made by mitosis had an identical life in relation to its antecedent cells? How did evolution solve that problem?

Last Answer : The formation of complex and distinct pluricellular organisms would not be possible if mitosis in embryos produced only daughter cells with an identical life history as the mother cell, since there ... process that activates and inactivates some genes within the cell in response to some stimulus.

Pick out the wrong statement. (A) The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively (B) Space time in a flow reactor is a measure of its capacity and is equal to the residence time when the density of reaction mixture is constant (C) Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty (D) In an ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in longitudinal direction

Description : Pick out the wrong statement. (A) The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively (B) Space time in a flow reactor is a ... ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in longitudinal direction

Last Answer : (C) Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty

Life cycle stages of louse are as follow A A. Egg, nymph, adult B. Egg, larvae, adult C. Egg, larvae, nymph, adult D. All are correct

Description : Life cycle stages of louse are as follow A A. Egg, nymph, adult B. Egg, larvae, adult C. Egg, larvae, nymph, adult D. All are correct

Last Answer : Egg, nymph, adult

In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote? -Biology

Description : In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote? -Biology

Last Answer : The number of chromosome in the female gamete would be same as that in the male gamete, i.e., it will have 24 chromosomes. The number of chromosome in the zygote would be double the number present in the gamete and hence, it would be 48.

Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is always greater than that at constant volume `(q_(V))`.

Description : Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is always greater than that at constant volume `(q_(V))`.

Last Answer : Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is ... False. D. If both Assertion & Reason are false.

Pick out the wrong statement. (A) For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity(B) For an ideal mixed reactor at steady state, the exit stream has the samecomposition as fluid within the reactor and the space time is equivalent toholding time for constant density system(C) Plug flow reactor (PFR) is always smaller than mixed reactor for allpositive reaction orders for a particular duty(D) Reaction rate does not decrease appreciably as the reaction proceeds incase of an autocatalytic reaction

Description : Pick out the wrong statement. (A) For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity(B) For an ideal ... D) Reaction rate does not decrease appreciably as the reaction proceeds in case of an autocatalytic reaction

Last Answer : (A) For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity

Distinguish between a gamete and zygote. Explain their roles in sexual reproduction -Biology

Description : Distinguish between a gamete and zygote. Explain their roles in sexual reproduction -Biology

Last Answer : Gamete represents the sex cell or germ cell in sexual reproduction. ... Zygote is the product of fertilization in which a male and a female gamete fuse with each other. The two fusing ... characters of their parents in their DNA. Fertilization brings characters of both parents into one zygote cell.

(i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Description : (i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Last Answer : (i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (a) The sperm reaches the ... endometrium of the uterus. This is called implantation.(iii) Blastocyst stage implants in the uterus.

Differentiate between zoospore and zygote. -Biology

Description : Differentiate between zoospore and zygote. -Biology

Last Answer : answer:

Where does the zygote of a gymnosperm develop? -Biology

Description : Where does the zygote of a gymnosperm develop? -Biology

Last Answer : If sperm then travel from the pollen to an egg so fertilization can occur, a diploid zygote results. The zygote develops into an embryo within a seed, which forms from the ovule inside the female cone.

why the seed has an embryo and not zygote? -Biology

Description : why the seed has an embryo and not zygote? -Biology

Last Answer : answer:

why the seed has an embryo and not zygote? -Biology

Description : why the seed has an embryo and not zygote? -Biology

Last Answer : answer:

why is zygote is formed after fertilization? -Biology

Description : why is zygote is formed after fertilization? -Biology

Last Answer : answer:

why is zygote is formed after fertilization? -Biology

Description : why is zygote is formed after fertilization? -Biology

Last Answer : answer:

What Must every member particular species one kind of organism be able to reproduce in order for the species to surive?

Description : What Must every member particular species one kind of organism be able to reproduce in order for the species to surive?

Last Answer : Need answer

Which one of the followings is/are correct definition of Habitat? (1) A complex of several types of communities (2) Natural environment of a living organism (3) The place where one would go find the particular living organism. (4) Natural environment of a living organism and the place where one would go find the particular living organism.

Description : Which one of the followings is/are correct definition of Habitat? (1) A complex of several types of communities (2) Natural environment of a living organism (3) The place where one would ... environment of a living organism and the place where one would go find the particular living organism.

Last Answer : (4) Natural environment of a living organism and the place where one would go find the particular living organism. Explanation: Habitat is generally defined as the natural environment ... an area of uniform environmental conditions associated with a particular community of plants and animals

Which one of the followings is/ are correct definition of Habitat? (1) A complex of several types of communities (2) Natural environment of a living organism (3) The place where one would go find the particular living organism. (4) Natural environment of a living organism and the place where one would go find the particular living organism.

Description : Which one of the followings is/ are correct definition of Habitat? (1) A complex of several types of communities (2) Natural environment of a living organism (3) The place where one would ... environment of a living organism and the place where one would go find the particular living organism.

Last Answer : Natural environment of a living organism and the place where one would go find the particular living organism.

Fenske equation for determining the minimum number of theoretical stages in distillation column holds good, when the (A) Relative volatility is reasonably constant (B) Mixture (to be separated) shows negative deviation from ideality (C) Mixture (to be separated) shows positive deviation from ideality (D) Multi-component distillation is involved

Description : Fenske equation for determining the minimum number of theoretical stages in distillation column holds good, when the (A) Relative volatility is reasonably constant (B) Mixture (to be separated) ... (to be separated) shows positive deviation from ideality (D) Multi-component distillation is involved

Last Answer : (A) Relative volatility is reasonably constant

Somatic chromosome number is 40. what shall be chromosome number in the cells of seminiferous tubule?

Description : Somatic chromosome number is 40. what shall be chromosome number in the cells of seminiferous tubule?

Last Answer : Somatic chromosome number is 40. what shall be chromosome number in the cells of seminiferous tubule? A. 40 B. 20 C. 10 D. 40 and 20

What occurs in meiosis? How is the chromosome number of daughter cells different?

Description : What occurs in meiosis? How is the chromosome number of daughter cells different?

Last Answer : •Gametes are produced by a variation of cell division called meiosis •Meiosis yields nonidentical daughter cells that have only one set of chromosomes, half as many as the parent cell

You are testing the insulation in an AC generator with a megohmeter. The resistance value of a dry, clean winding will ____________. A. continue to rise as the test potential is maintained, becoming fairly steady as the leakage current stabilizes B. remain constant as the temperature of the windings increases C. continue to drop as the potential is maintained, becoming fairly steady after 5 to 7 minutes D. stabilize after approximately 2 to 4 minutes of fluctuation

Description : You are testing the insulation in an AC generator with a megohmeter. The resistance value of a dry, clean winding will ____________. A. continue to rise as the test potential is maintained, ... fairly steady after 5 to 7 minutes D. stabilize after approximately 2 to 4 minutes of fluctuation

Last Answer : Answer: A

A constant output voltage from an AC generator is maintained by the _____________. A. prime mover governor B. exciter generator C. voltage regulator D. reverse power relay

Description : A constant output voltage from an AC generator is maintained by the _____________. A. prime mover governor B. exciter generator C. voltage regulator D. reverse power relay

Last Answer : Answer: C

At equilibrium the concentration of water in vapour phase (C* ) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is (A) 0.0 (B) 0.2 (C) 0.4 (D) 1.0

Description : At equilibrium the concentration of water in vapour phase (C* ) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room ... which the temperature is maintained constant) is (A) 0.0 (B) 0.2 (C) 0.4 (D) 1.0

Last Answer : (C) 0.4

Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and (A) Humidified with wet bulb temperature decreasingB) Humidified at constant wet bulb temperature(C) Dehumidified(D) None of these

Description : Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and (A) ... temperature decreasing B) Humidified at constant wet bulb temperature (C) Dehumidified (D) None of these

Last Answer : (A) Humidified with wet bulb temperature decreasing

Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at 35°C (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C (C) Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C (D) A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) Discharge of water by a centrifugal pump being run at a constant rpm (B) Water flow in the suction and discharge pipe of a reciprocating pump (C) Water discharge from a vertical vessel in which constant level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Description : In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) ... level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Last Answer : (B) Water flow in the suction and discharge pipe of a reciprocating pump

An ideal gas is maintained at constant temperature. If the pressure on the gas is doubled, the volume is  a. increased fourfold  b. doubled  c. reduced by half  d. decreased by a quarter

Description : An ideal gas is maintained at constant temperature. If the pressure on the gas is doubled, the volume is  a. increased fourfold  b. doubled  c. reduced by half  d. decreased by a quarter

Last Answer : reduced by half

A change in the amount of yolk and its distribution in the egg will affect (a) pattern of cleavage (b) number of blastomeres produced (c) fertilisation (d) formation of zygote.

Description : A change in the amount of yolk and its distribution in the egg will affect (a) pattern of cleavage (b) number of blastomeres produced (c) fertilisation (d) formation of zygote.

Last Answer : a) pattern of cleavage

Answer: e The role of nutritional support in the cancer patient remains an important component of overall therapy. Preoperative nutritional support should be given only to those patients who do not require an emergency operation and who have severe weight loss (> 15% of pre-illness body weight) and a serum albumen < 2.9 mg%. Preoperative nutrition (enteral or parenteral) should not be given for longer than 7 to 10 days. Enteral nutrition is always the preferred route of feeding cancer patients if the GI tract is functional. There are several benefits of using the bowel lumen for nutrient delivery. The trophic effects of enteral feeding on small bowel mucosa have been well described. The integrity of the mucosal lining is maintained and it may provide an effective barrier to intraluminal

Description : Answer: e The role of nutritional support in the cancer patient remains an important component of overall therapy. Preoperative nutritional support should be given only to those patients who ... of bowel rest; this atrophy is not reversed by currently available total parenteral nutrition solutions

Last Answer : Which of the following hormones can be expected to be released as part of the stress response? a. Antidiuretic hormone (ADH) b. Aldosterone c. Insulin d. Epinephrine nswer: a, b, d ... This hormone has the exact opposite effect of insulin, which promotes glucose storage and uptake by the cells

Advantages of B2C commerce are (i) Business gets a wide reach to customers (ii) Payment for services easy (iii)Shop can be open 24 hours a day seven days a week (iv)Privacy of transaction always maintained a. i and ii b. ii and iii c. i and iii d. iii and iv

Description : Advantages of B2C commerce are  (i) Business gets a wide reach to customers  (ii) Payment for services easy  (iii)Shop can be open 24 hours a day seven days a week  (iv)Privacy of transaction always maintained a. i and ii b. ii and iii c. i and iii d. iii and iv

Last Answer : c. i and iii  

Find the number of ways in which 10 different flowers can be strung to form a garland so that three particular flowers are always together -Maths 9th

Description : Find the number of ways in which 10 different flowers can be strung to form a garland so that three particular flowers are always together -Maths 9th

Last Answer : Consider the three particular flowers as one flower. Then we have (10 – 3) + 1 = 8 flowers which can be strung in the garland. Thus the garland can be formed in (8 – 1)!, i.e., 7! ways But the 3 particular flowers can be arranged amongst themselves in 3!

The recessive genes located on X-chromosome humans are always (a) lethal (b) sub-lethal (c) expressed in males (d) expressed in females.

Description : The recessive genes located on X-chromosome humans are always (a) lethal (b) sub-lethal (c) expressed in males (d) expressed in females.

Last Answer : (c) expressed in males