What must occur within a gene pool before the formation of new species?

What must occur within a gene pool before the formation of new species?
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Answer: Reproductive Isolation
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Viable material of endangered species can be preserved by (a) gene bank (b) gene library (c) herbarium (d) gene pool.

Description : Viable material of endangered species can be preserved by (a) gene bank (b) gene library (c) herbarium (d) gene pool.

Last Answer : (a) gene bank

Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as Or Random unidirectional

Description : Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as Or Random unidirectional

Last Answer : Variation in gene frequencies within populations can occur by chance rather than by natural selection. ... flow C. Genetic drift D. Random mating

During which stage or phase of bone healing after fracture does callus formation occur? a) Reparative Callus formation occurs during the reparative stage but is disrupted by excessive motion at the fracture site b) Remodeling Remodeling is the final stage of fracture repair during which the new bone is reorganized into the bone’s former structural arrangement. c) Inflammation During inflammation, macrophages invade and debride the fracture area. d) Revascularization Revascularization occurs within about 5 days after the fracture.

Description : During which stage or phase of bone healing after fracture does callus formation occur? a) Reparative Callus formation occurs during the reparative stage but is disrupted by excessive motion ... the fracture area. d) Revascularization Revascularization occurs within about 5 days after the fracture.

Last Answer : a) Reparative Callus formation occurs during the reparative stage but is disrupted by excessive motion at the fracture site

The region of the Lac operon which must be free from structural gene transcription to occur is (A) The operator locus (B) The promoter site (C) The ‘a’ gene (D) The ‘i’ gene

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Last Answer : Answer : A

When process adds new genes to a gene pool?

Description : When process adds new genes to a gene pool?

Last Answer : Need answer

Does group celibacy naturally eliminate the groups effect on the gene pool?

Description : Does group celibacy naturally eliminate the groups effect on the gene pool?

Last Answer : Seems like a more than reasonable assumption

Gene pool is :

Description : Gene pool is :

Last Answer : Gene pool is : A. Genotype of an individual of population B. Different gens of all individuals ... artificially synthesised genes D. Genes of a genus

The sum of genes in a population is called – (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Description : The sum of genes in a population is called – (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Last Answer : (4) Gene pool Explanation: Phenotype refers to a set of observable characteristics of an individual or group resulting from the interaction of its genotype with its environment. Gene pool refers to the stock of different genes in an interbreeding population.

Which of the following terms refers to the collection of all alleles of every gene present in the members of a population? Is it: a) population expression b) gene pool c) genetic dictionary d) none of these

Description : Which of the following terms refers to the collection of all alleles of every gene present in the members of a population? Is it: a) population expression b) gene pool c) genetic dictionary d) none of these

Last Answer : ANSWER: B -- GENE POOL

The sum of genes in a population is called (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Description : The sum of genes in a population is called (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Last Answer : Gene pool

Cells must constantly manage metabolic pathways, and this is often done by balancing specific biochemical reactions within a pathway. For example, the metabolic product of one pathway may block the formation of that specific metabolite at an earlier point in the pathway to prevent a buildup of that specific product. What is this process called?

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Last Answer : Feedback inhibition

What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor absorbed Correct (4) Answer – (1) energy is always absorbed Explanation: If a bond is broken, energy is released; and if a bond is formed, energy must have been absorbed. As these occur, a change in the chemical energy of the system also occurs. Within each bond of a molecule is an experimentally determined amount of enemy that upon the breaking of that bond is released into the chemical system. The energy within these bonds are 'stored' and can be easily thought of as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Description : What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor ... as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Last Answer : Silver nitrate solution is kept in brown bottles in laboratory because - (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it

The origin of a new species first requires A) reduced gene flow. B) increased gene flow. C) reduced mutation rates. D) increased mutation rates.

Description : The origin of a new species first requires A) reduced gene flow. B) increased gene flow. C) reduced mutation rates. D) increased mutation rates.

Last Answer : A) reduced gene flow.

Pick out the wrong statement. (A) Bubble size increases with the dynamic viscosity of the liquid in case of nucleate pool boiling (B) Thermal conductivity of a dry material is more than that of the damp material (C) Ratio of its capacity to economy equals the steam consumption in kg/hr in an evaporator (D) Vaporisation of organic substances in evaporator mostly causes foam formation

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Last Answer : (B) Thermal conductivity of a dry material is more than that of the damp material

When immigration adds to the size of the domestic labor pool which of following is likely to occur?

Description : When immigration adds to the size of the domestic labor pool which of following is likely to occur?

Last Answer : Wages are likely to decrease.

Where can I go within 3-4 hours of SF that has a nice hotel with a hot tub, heated pool or hot springs?

Description : Where can I go within 3-4 hours of SF that has a nice hotel with a hot tub, heated pool or hot springs?

Last Answer : 3–4 hours? The Resort at Squaw Creek- beautiful hot tubs and swimming pools in the snow, saunas, spa. I took my kids there but it is not a kids resort, but kids will like it.

Transfer of genes (gene flow) in between different species is known as (a) Vertical gene flow (b) Horizontal gene flow (c) Lateral gene flow (d) Side gene flow

Description : Transfer of genes (gene flow) in between different species is known as (a) Vertical gene flow (b) Horizontal gene flow (c) Lateral gene flow (d) Side gene flow

Last Answer : (b) Horizontal gene flow

A test cross is carried out to (a) determine the genotype of a plant at F2 (b) predict whether two traits are linked (c) assess the number of alleles of a gene (d) determine whether two species or varieties will breed successfully.

Description : A test cross is carried out to (a) determine the genotype of a plant at F2 (b) predict whether two traits are linked (c) assess the number of alleles of a gene (d) determine whether two species or varieties will breed successfully.

Last Answer : (a) determine the genotype of a plant at F2

Genomic islands are a. Gene Sequences Not Part Of The Chromosomal Genes. b. Adjacent Gene Sequences Unique To One Or A Few Strains In A Species. c. Acquired By HGT. d. Both B And C Are Correct.

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Last Answer : d. Both B And C Are Correct.

If a gene mutation prevents formation of an enzyme normally used by a lysosomes, a disease may result known as (A) Lysosomal abstracted disease (B) Lysosomal secretory disease (C) Lysosomal storage disease (D) All A, B and C

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Last Answer : (C) Lysosomal storage disease

A 65-year old patient has colon carcinoma metastatic to the liver and lungs. He has had a weight loss of 10 kg. Cytokine-dependent tumor cachexia is attributable to which of the following? a. Increased glucose uptake and increased glycogen breakdown occur in this circumstance. b. Suppressed activity of lipoprotein lipase results from TNFa c. TNFa stimulates lipolysis d. The differentiation process of pre-adipocytes is impaired e. Partial reversal of differentiated adipocytes to pre-adipocyte morphology and gene expression occurs

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Last Answer : Answer: a, b, c, d, e Tumor cachexia appears to be mediated by TNFa. Lipopolysaccharide (LPS), as well as other cytokines, activate a variety of inflammatory cells, most ... chronic syndromes of anorexia, weight loss, and cachexia that are associated with both chronic infection and malignancy

ABO blood groups in humans are controlled by the gene I. It has three alleles - IA, IB and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur? (a) Three (b) One (c) Four (d) Two

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A specific BRCA1 cancer-predisposing gene mutation seems to occur more frequently among women of which descent? a) Ashkanazi Jewish Expression of the BRCA1 gene is an example of inheritance in the development of breast cancer. b) Mediterranean Glucose-6-phosphate dehydrogenase deficiency (G6PD) is a common enzyme abnormality that affects millions of people throughout the world, especially those of Mediterranean, South East Asian, African, Middle Eastern, and Near Eastern origin.

Description : A specific BRCA1 cancer-predisposing gene mutation seems to occur more frequently among women of which descent? a) Ashkanazi Jewish Expression of the BRCA1 gene is an example of ... of treatment for tuberculosis) are at significantly increased risk for developing isoniazid-induced hepatitis.

Last Answer : a) Ashkanazi Jewish Expression of the BRCA1 gene is an example of inheritance in the development of breast cancer.

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.

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

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Last Answer : all above

A transgenic organism is one that _____. a. Has Donated A DNA Fragment To Another Organism. b. Contains A Gene From Another Organism. c. Contains Useless "Genetic Debris." d. Has Exchanged Gene Loci Within The Organism.

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The transposase gene encodes an enzyme that facilitate A- viral replication within a genome B- general recombination C- site-specific integration of transposable elements D- none of the above

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8. Non coding sequences present within a gene is called: (a) Exon (b) Operon (c) Promoter (d) Intron

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If the three-phase motor, shown in the illustrated schematic diagram, is running in the forward direction, which of the following actions must occur before the motor will reverse rotation? EL-0011 A. Normally-closed contacts '4'-'5' must open. B. Normally- open contacts '2'-'3' must close. C. 'L1' and 'L3' must be interchanged via the 'R' contacts. D. All of the above.

Description : If the three-phase motor, shown in the illustrated schematic diagram, is running in the forward direction, which of the following actions must occur before the motor will reverse rotation? EL-0011 A. Normally-closed ... 'L1' and 'L3' must be interchanged via the 'R' contacts. D. All of the above.

Last Answer : Answer: C

Activities which must be finished before a given event can occur are termed as _________. A. Preceeding Activities. B. Succeeding Activities C. Concurrent Activities D. Dummy Activities.

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Last Answer : A. Preceeding Activities.

The factors involved in the formation of new species are

Description : The factors involved in the formation of new species are

Last Answer : The factors involved in the formation of new species are A. competition and variation B. ... . competition and mutation D. isolation and mutation

The Constitution allows preventive detention but stipulates: (1) that no one should be detained beyond three months unless an Advisory Board authorizes detention beyond that period (2) that the grounds for detention should be conveyed to the detenu before arresting him (3) that the detenu must be produced before the nearest magistrate within a period of 24 hours of his arrest (4) All of the above

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A proclamation of emergency must be placed before the Parliament for its approval (1) Within 1 month (2) Within 2 months (3) Within 6 months (4) Within 1 year

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For union between stock and scion in grafting which one is the first to occur? (a) Formation of callus (b) Production of plasmodesmata (c) Differentiation of new vascular tissues (d) Regeneration of cortex and epidermis

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During which stage or phase of bone healing after fracture is devitalized tissue removed and new bone reorganized into its former structural arrangement? a) Remodeling Remodeling is the final stage of fracture repair. b) Inflammation During inflammation, macrophages invade and debride the fracture area. c) Revascularization Revascularization occurs within about 5 days after the fracture. d) Reparative Callus formation occurs during the reparative stage but is disrupted by excessive motion at the fracture site.

Description : During which stage or phase of bone healing after fracture is devitalized tissue removed and new bone reorganized into its former structural arrangement? a) Remodeling Remodeling is the final stage of ... occurs during the reparative stage but is disrupted by excessive motion at the fracture site.

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Not being nasty, but is there a jelly net/filter that the new phylum Cnidaria fall into before coming through to the main pool?

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Last Answer : answer:LOL… how well I recall this question, almost word-for-word, during the Answerbag diaspora of December 2009, when I joined. Try to find a quiet part of the pool to hang in while the new fry muddy up the littoral, @ZEPHYRA. They’ll be old-timers before you know it.

7. In a recombinant DNA technology a plasmid vector must be cleaved by a) the same enzyme that leaves the donor gene b) modified DNA ligase c) a heated alkaline solution d) four separate enzymes

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Select the one which does not results in the formation of aromatic species .

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Consider the coordination compound , `[Co(NH_(3))_(6)]Cl_(3)`. In the formation of the complex, the species which acts as the Lewis acid is :

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In genetic engineering the transfer of hereditary information from one species to another results in the formation of?

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Which of the following is/are correct about the Rann of Kachchh ? 1. It is a flat saline marsh land 2. It is in Rajasthan 3. It is the home of the Indian Wild Ass 4. It is a unique land formation supporting several singular species of fauna (a) 1, 2 and 3 (b) 2, 3 and 4 (c) 1, 3 and 4 (d) 1, 2, 3 and 4

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Individuals of species which occur in a particular area constitute: (a) Flora (b) Fauna (c) Population (d) Flora and fauna

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In which stage of cell does crossing over occur? What is its role in the origin of species?

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Assertion : In the human the temperature of scrotum is `2-2.5^(@)C` lesser then normal body temperature . Reason : Formation of sperm does not occur a

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