Description : Define aereole and give an example.
Last Answer : Ans: Aereole is elevated region on the Phylloclade of Opuntia which represents a node and consists of spinous modified leaves. The spines are normal spines and hair like spines known as barbs.
Description : Failure of a viable pollen to grow down the style of the flower of the same variety is called ___________: a. Self sterility b. Self incompatibility c. Self unfruitfulness d. Sterility
Last Answer : Self incompatibility
Description : In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result (a) there is high degree of sterility (b) one can conclude that the plant is apomictic (c) self fertilization is prevented (d) there is no change in success rate of fertilization.
Last Answer : (c) self fertilization is prevented
Description : Define marcescent and acrescent calyx and an example to each.
Last Answer : Ans: Persistant calyx that does not show development after fertilization is marcescent calyx. Ex: Solanum melongena. Persistant calyx that shows development even after fertilization is called as Acrescent calyx. Ex: Physalis
Description : What is self-pollination ?
Last Answer : Self-pollination is when the pollen spontaneously transfers from the anther into the uterus of the same flower or any other flower of the same plant.
Description : Define artificial system of classification and give two examples.
Last Answer : Ans: Classification which is based on one or few easily comparable characters is called as Artificial system of classifications. Ex: Theophrastus classification of plants into Herbs, Shrubs ... in Historia Plantarum. Linnaeus classification of plants based on androecium and Gynoecium characters.
Description : What is a complete root parasite? Give an example.
Last Answer : Ans: A complete parasite is achlorophyllous, establishes haustorial connection with both xylem and Phloem of the host to absorb both mineral water and organic food materials from the host plant. Ex: Orobanche
Description : Which group of Plants are called Amphibians of the plant kingdom and give an example.
Last Answer : Ans: Bryophytes are called as Amphibians of the Plant Kingdom. Example is Funaria.
Description : To which family the petro plants belong and give an example.
Last Answer : Ans: Petro plants belong to family Euphorbiaceae. Example is Jatropa
Description : What are alleles? Give an example.
Last Answer : Ans: Alternative forms for a gene are called as alleles. Ex: The alleles for length of stem are T and t.
Description : Define phylloclade and describe it.
Last Answer : Ans: Phylloclade is an aerial modified stem or branch with several internodes whose axis becomes green colored to perform photosynthesis. It may be cylindrical as in Casuarina or flat as in ... known as areole. This type of modifications reduce transpiration and an adaptation of xerophytes.
Description : Define anterior and posterior sides of flower.
Last Answer : Ans: The side of the flower facing the bract is anterior side and facing the axis is posterior side.
Description : Define Phytogeography
Last Answer : Ans: it is Study of distribution of plants on this planet.
Description : Define mericarp
Last Answer : Ans: It is each fruit unit seen in Schizocarpic fruits like Lomentum and Schizocarp.
Description : Define communities? Who classified plant communities into hydrophytes, mesophytes and xerophytes.
Last Answer : Ans: Community is a group of different species living under same climatic conditions. They are classified by Warming based on dependence on water
Description : Define Population and Community.
Last Answer : Ans: Population is a group of similar individuals of a species living in an area. Community is a group of different species living under same climatic conditions.
Description : Define chromosome maps
Last Answer : Ans: it is condensed graphic representation of the distance between the genes in a linkage group expressed in the percentage of recombination, located in a single chromosomal group.
Description : Vegetative propagation is an example of
Last Answer : Vegetative propagation is an example of – Recurrent apomixis
Description : Nutmeg is an example of
Last Answer : Nutmeg is an example of – Ruminate endosperm
Description : What cross is useful in determining the genetic purity of gametes? Show with an example.
Last Answer : Ans: Test cross. If it is done between an individual with Tt genotype and the recessive parent with tt genotype, 50% of the individuals obtained will be tall and the remaining are dwarf.
Description : Example of natural vegetative propagation does not include a) Corals b) bulbs c) corms d) rhizomes
Last Answer : a) Corals
Description : Example of plant in which vegetative propagation is occurred by leaves is called a) Cannabisn b) Chrysanthemum c) Cryophyllum d) Brassica
Last Answer : c) Cryophyllum
Description : A common example of stem tuber is a) Ginger b) Garlic c) Onion d) Potato
Last Answer : d) Potato
Description : The anti-sterility or anti-reproductory vitamin is:
Last Answer : The anti-sterility or anti-reproductory vitamin is: A. Vitamin `B_(12)` B. Vitamin D C. Vitamin D D. Vitamin A
Description : Anti sterility Vitamin is (A) Vitamin B1 (B) Vitamin B2 (C) Vitamin E (D) Vitamin K
Last Answer : Answer : C
Description : In human beings, vitamin E prevents (A) Sterility (B) Hepatic necrosis (C) Muscular dystrophy (D) None of these
Last Answer : Answer : D
Description : The vector of sterility mosaic of pigeonpea
Last Answer : Ans. Mite (Aceria cajani) (5) Groundnut
Description : An important male sterility source of sorghum
Last Answer : Ans. Tift 60
Description : When pollen sterility is caused by cytoplasmic genes
Last Answer : Ans. Cytoplasmic Male Sterility (CMS)
Description : Sterility mosaic and wilt resistant variety of pigeonpea
Last Answer : Ans.Amar, Narendra Arhar 1, Azad
Description : Which of the following techniques ar used to create transgenic crops? a. Budding and Grafting in fruit plants b. Cytoplasmic male sterility c. Gene slicing d. Only 1 e. Both 1 and 2 f. Both 2 and 3 g. Both 1 and 3
Last Answer : f. Both 2 and 3
Description : Male sterility promotes: a. Autogamy b. Allogamy c. Homogamy d. Chasmogamy
Last Answer : Chasmogamy
Description : In pollen development Gametocides induces a problem of: a. Sterility b. Viability c. Fertility d. Mobility
Last Answer : Sterility
Description : Which of the following is incorrect regarding vasectomy? (a) No sperm occurs in seminal fluid (b) No sperm occurs in epididymis (c) Vasa deferentia is cut and tied (d) Irreversible sterility
Last Answer : (b) No sperm occurs in epididymis
Description : Salpingitis is associated with_______ and can lead to___________ a. Syphilis; Gumma Formation b. Gonorrhea; Sterility c. Chlamydia; Ophthalmia d. Chancroid; Soft Chancre
Last Answer : b. Gonorrhea; Sterility
Description : Which of the following is vector for sterility mosaic of Red gram a. Aphid b. Erophyid mite c. White fly d. Thrips
Last Answer : b. Erophyid mite
Description : Inability of a hybrid to produce viable offsprings is known as a. Hybrid b. sterility c. Hybrid inviability d. Hybrid breakdown e. All of these
Last Answer : a. Hybrid
Description : 17. Deficiency of vitamin B1 causes the disease (1) Sterility (2) Convulsions (3) Beri-Beri (4) Cheilosis
Last Answer : Beri-Beri
Description : What is the principle behind sterility testing? Describe Membrane filtration method for sterility testing.
Last Answer : Principle: Basic principle of sterility test is that if bacteria or fungi are placed in a medium which provides the nutritive material and water and kept at favourable temperature the organism will grow and their presence can be indicated by the turbidity in the clear medium.
Description : Which combination is incorrect (a)Niacin-Pellagra (b)Thiamin-Beriberi (c) Vitamin K-Sterility (d) Vitamin D-Rickets
Last Answer : (c) Vitamin K-Sterility
Description : What is aseptic technique? List the various sources of contamination and explain the sterility test.
Last Answer : Aseptic technique: The method which is used to prevent the access of microorganism during the preparation of parenteral product and their testing are called Aseptic Technique . Sources of contamination: 1) ... the sample is declared to have pass the test and same test is repeated for two times.
Description : Give an account on the structure and function of tRNA
Last Answer : Ans: Transfer RNA is the smallest among the RNAs. It is also known as adaptor RNA or decoding RNA or soluble RNA. It accounts for 10 - 15% of total cellular RNA. It consists of 80 - 90 ... significance. tRNA brings the aminoacids to the surface of ribosomes at the time of protein synthesis.
Description : With the help of labeled diagram give an account of the cell organelle which is generally referred as Cell brain.
Last Answer : Ans: Nucleus is the controlling centre of the cell that consists of chromosomes. Structurally it has four parts known as Nuclear envelope, Nucleoplasm, Nucleolus and Chromatin. Nuclear ... chromosome at secondary constriction. It also disappears in Prophase and reappears in telophase.
Description : Give an account on suicidal bags of the cell.
Last Answer : Ans: These are Lysosomes. They have single unit membrane and formed from E.R. and Golgi complex. These were discovered by de Duve. They are rich in hydrolytic enzymes and play a role in digestion. ... lysosomes can destroy the contents of the same cell they are called as Suicidal bags of the cell.
Description : What are the three types of styles? Give examples.
Last Answer : Ans: The three types of styles are 1. Terminal – Ex: Datura, 2. Lateral – Ex: Mangifera, 3. Gynobasic – Ex: Ocimum
Description : What is Polygamous condition and give two examples.
Last Answer : Ans: Polygamous condition is presence of male, female and bisexual flowers on the same plant. Ex: Mangifera, Polygonum
Description : Which aerial stem modification is concerned with vegetative propagation? Give two examples.
Last Answer : Ans: Bulbils. Ex: Agave americana, Dioscoria bulbifera
Description : What are fasciculated roots? Give two examples.
Last Answer : Ans: Tuft of storage adventitious roots are called as fasciculated roots. Ex: Asparagus, Dahlia
Description : What are assimilatory roots? Give two examples.
Last Answer : Ans: Modified green adventitious roots that help in assimilation of carbon dioxide are called as assimilatory roots. Examples are Taeniophyllum, Tinospora.
Description : What is meant by Monosiphonous and Polysiphonous pollen grains? Give examples.
Last Answer : Ans: Pollen gains that form single pollen tube are monosiphonous. Ex: Solanum. Which form more than one pollen tubes are Polysiphonous. Ex: Malvaceae, Cucurbitaceae