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What is the function of filiform apparatus in an angiospermic embryo sac?
General Science Biology Botany Class 12th NEET UG NEET UG Preparation
Q. 25 of Quiz-1424 (Que-ID : 2868)
What is the function of filiform apparatus in an angiospermic embryo sac?
- Brings about opening of the pollen tube
- Guides the pollen tube into a synergid
- Prevents entry of more than one pollen tube into a synergid
- None of these
Ans → (b)Guides the pollen tube into a synergid
Explanation → Guides the pollen tube into a synergid
This question is taken from this post → Sexual Reproduction in Flowering Plants - Class 12th Biology Practice Test| MCQs For NEET - attemp/practice
More MCQs in - Sexual Reproduction in Flowering Plants - Class 12th Biology Practice Test| MCQs For NEET
Q. 1 of Quiz-1424 (Que-ID : 2844)
The anther wall consists of four wall layers where
- tapetum lies just inner to endothecium
- middle layers lie between endothecium and tapetum
- endothecium lies inner to middle layers
- tapetum lies next to epidermis
Q. 2 of Quiz-1424 (Que-ID : 2845)
Anther is generally
- monosporangiate
- bisporangiate
- tetrasporangiate
- trisporangiate.
Q. 3 of Quiz-1424 (Que-ID : 2846)
The stamens represent
- microsporangia
- male gametophyte
- male gametes
- microsporophylls.
Q. 4 of Quiz-1424 (Que-ID : 2847)
Nonessential floral organs in a flower are
- sepals and petals
- anther and ovary
- stigma and filament
- petals only.
Q. 5 of Quiz-1424 (Que-ID : 2848)
Science of cultivation, breeding, marketing and arrangement of flowers is called
- arboriculture
- floriculture
- horticulture
- anthology
Q. 6 of Quiz-1424 (Que-ID : 2849)
From among the sets of terms given below, identify those that are associated with the gynoecium
- Stigma, ovule, embryo sac, placenta
- Thalamus, pistil, style, ovule
- Ovule, ovary, embryo sac, tapetum
- Ovule, stamen, ovary, embryo sac
Q. 7 of Quiz-1424 (Que-ID : 2850)
During microsporogenesis, meiosis occurs in
- endothecium
- microspore mother cells
- microspore tetrads
- pollen grains
Q. 8 of Quiz-1424 (Que-ID : 2851)
The outermost and innermost wall layers of microsporangium in an anther are respectively
- endothecium and tapetum
- epidermis and endodermis
- epidermis and middle layer
- epidermis and tapetum.
Q. 9 of Quiz-1424 (Que-ID : 2852)
Embryo sac is to ovule as _______ is to an anther.
- Stamen
- filament
- pollen grain
- androecium
Q. 10 of Quiz-1424 (Que-ID : 2853)
An embryo may sometimes develop from any cell of embryo sac other than egg. It is termed as
- apospory
- apogamy
- parthenogenesis
- parthenocarpy
Q. 12 of Quiz-1424 (Que-ID : 2855)
Indentify the wrong statement regarding post-fertilisation development
- The ovary wall develops into pericarp.
- The outer integument of ovule develops into tegmen
- The fusion nucleus (triple nucleus) develops into endosperm.
- The ovule develops into seed.
Q. 13 of Quiz-1424 (Que-ID : 2856)
Persistent nucellus is called as _______ and is found in _______.
- perisperm, black pepper
- perisperm, groundnut
- endosperm, black pepper
- endosperm groundnut
Q. 14 of Quiz-1424 (Que-ID : 2857)
In albuminous seeds, food is stored in _______ and in non albuminous seeds, it is stored in _______
- endosperm, cotyledons
- cotyledons, endosperm
- nucellus, cotyledons
- endosperm, radicle
Q. 15 of Quiz-1424 (Que-ID : 2858)
Endospermic seeds are found in
- castor
- barley
- Coconut
- All of these
Q. 16 of Quiz-1424 (Que-ID : 2859)
Spiny or sticky pollen grains and large, attractively coloured flowers are associated with
- hydrophily
- entomophily
- ornithophily
- anemophily
Q. 17 of Quiz-1424 (Que-ID : 2860)
Which of the following is not a water pollinated plant ?
- Zostera
- Vallisneria
- Hydrilla
- Cannabis
Q. 18 of Quiz-1424 (Que-ID : 2861)
Plants with ovaries having only one or a few ovules are generally pollinated by
- bees
- Butterflies
- birds
- Wind
Q. 20 of Quiz-1424 (Que-ID : 2863)
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in
- papaya
- bottle gourd
- maize
- all of these.
Q. 21 of Quiz-1424 (Que-ID : 2864)
Even in absence of pollinating agents seed-setting is assured in
- Commelina
- Zostera
- Salvia
- Fig
Q. 22 of Quiz-1424 (Que-ID : 2865)
Both chasmogamous and cleistogamous flowers are present in
- Helianthus
- Commelina
- Rosa
- Gossypium
Q. 23 of Quiz-1424 (Que-ID : 2866)
Polygonum type of embryo sac is
- 8 – nucleate, 7 – celled
- 8 – nucleate, 8 – celled
- 7 – nucleate, 7 – celled
- 4 – nucleate, 3 – celled
Q. 24 of Quiz-1424 (Que-ID : 2867)
The female gametophyte of a typical dicot at the time of fertilisation is
- 8 – celled
- 7 – celled
- 6 – celled
- 5 – celled
Q. 25 of Quiz-1424 (Que-ID : 2868)
What is the function of filiform apparatus in an angiospermic embryo sac?
- Brings about opening of the pollen tube
- Guides the pollen tube into a synergid
- Prevents entry of more than one pollen tube into a synergid
- None of these
More MCQs In - General Science Biology Botany Class 12th NEET UG NEET UG Preparation
Q. 1 of Quiz- (Que-ID : 3494)
log S = log C + Z log A In the given equation of species-area relationship, the value of regression coefficient for a whole continent, would be
- 0.1-0.2
- 0.5-0.7
- 0.6-1.2
- 0.3-0.5
Q. 21 of Quiz- (Que-ID : 2664)
which among the following is caused due to decreased respiratory surface area
- Astma
- Emphysema
- Sclerosis
- None of the above
Q. 19 of Quiz- (Que-ID : 3462)
Science linking heredity with environment is:
- Ecology
- Ecophysiology
- Genecology
- Genetics
Q. 7 of Quiz- (Que-ID : 3075)
Oxidative phosphorylation refers to
- Anaerobic production of ATP
- The citric acid cycle production of ATP
- Production of ATP by chemiosmosis
- Alcoholic fermentation
Q. 18 of Quiz- (Que-ID : 3436)
Bt toxin is :
- intracellular lipid
- Intracellular crystalline protein
- Extracellular crystalline protein
- Lipid
Q. 18 of Quiz- (Que-ID : 3161)
The minimum amount of energy required to initiate a chemical reaction is called
- enzymatic energy
- activation energy
- substrate energy
- initiation energy
Q. 25 of Quiz- (Que-ID : 3343)
Which of the following diseases is transmitted by the bite of the female mosquito vector ?
- Filariasis
- Amoebiasis
- Typhoid
- Pneumonia
Q. 23 of Quiz- (Que-ID : 2966)
They year 2003 was celebrated as the 50th anniversary of discovery of
- transposons by Barbare Me Clintock
- structure of DNA by Watson and Crick
- Mendel’s laws of inheritance
- biotechnology by Kary Muliis.
Q. 16 of Quiz- (Que-ID : 3109)
Toxicity of which element leads to the appearance of brown spots on leaves
- Mg
- Mn
- Fe
- Cu
Q. 5 of Quiz- (Que-ID : 2748)
Chemical name of T4 is
- Tetradiodothyronine
- Tridiodothyronine
- Tetraiodothyronine
- Triiodothyronine
Q. 23 of Quiz- (Que-ID : 3416)
Two microbes found to be very useful in genetic, engineering are
- Escherichiya Coli and Agrobacterium tumefaciens
- Virbio chloerae and tailed bacteriophage
- Diplococcus sp and pseudomonas sp
- None of these
Q. 24 of Quiz- (Que-ID : 3217)
Which of the following provide maximum mechanical strength to a tree trunk.
- Heart wood
- Sap wood
- Cork
- Late wood
Q. 21 of Quiz- (Que-ID : 3514)
in your opinion, which is the most effective way to conserve the plant diversity of an area?
- By creating Biosphere reserve
- By creating Botanical gardens
- By developing seed banks
- By tissue culture method
Q. 2 of Quiz- (Que-ID : 3045)
Angiosperm pollen is generally released at the
- 1 – celled stage
- 2 – celled stage
- 3 – celled stage
- male gamete formation stage
Q. 5 of Quiz- (Que-ID : 567)
Conversion of heat into electrical energy can be achieved by using a -
Conversion of heat into electrical energy can be achieved by using a -
- ammeter
- hydromere
- voltmeter
- thermocouple
Q. 7 of Quiz- (Que-ID : 3425)
Bt Toxin is :
- Intracellular lipid
- Intracellular crystal protein
- Extracellular Crystal protein
- Lipid
Q. 24 of Quiz- (Que-ID : 2942)
Experimental verification of ‘chromosomal theory of inheritance’ was done by
- Sutton and Boveri
- Morgan et al
- Henking
- Karl Correns
Q. 22 of Quiz- (Que-ID : 3140)
Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as
- Porins
- Pressure gradient
- Enzymes
- Flaccid
Q. 1 of Quiz- (Que-ID : 3269)
Rhodophyceae is called red algae because of the pigment
- Fucoxanthin
- Phycoerythrin
- Carotenoids
- Chlorophyll c
Q. 20 of Quiz- (Que-ID : 3113)
NPK denotes
- Nitrogen, Protein, Kinetin
- Nitrogen, Protein, Potassium
- Nitrogen, Potassium, kinetin
- Nitrogen, Phosphorus, Potassium
Q. 4 of Quiz- (Que-ID : 2797)
The cutaneous plexus and the papillary plexus consist of
- Specialized cells for cutaneous sensations
- A network of arteries to provide dermal supply
- A network of nerves to provide dermal sensation
- Gland cells that release cutaneous secretions
Q. 13 of Quiz- (Que-ID : 3431)
The Ti plasmid used in genetic engineering is obtained from:
- Bacillus thruingiensis
- E. Coii
- Agrobacterium hizogenes
- Agrobacterium tumefaciens
Q. 19 of Quiz- (Que-ID : 3087)
Light reactions of photosynthesis occurs in
- stroma
- thylakoid
- grana
- cytoplasm of cell
Q. 25 of Quiz- (Que-ID : 2893)
Intensely lactating mothers do not generally conceive due to the
- suppression of gonadotropins
- hypersecretion of gonadotropins
- suppression of gametic transport
- suppression of fertilisation
Q. 23 of Quiz- (Que-ID : 3341)
Elephantiasis, a chronic inflammation that results in gross deformities is caused by
- Ascaris
- E.coli
- Wuchereria
- Trichophyton
Q. 6 of Quiz- (Que-ID : 3349)
Jaya and Ratna are the semi-dwarf varieties of
- wheat
- rice
- cowpea
- mustard
Q. 25 of Quiz- (Que-ID : 3168)
The most common monomer of carbohydrates is
- Sucrose
- Fructose
- Maltose
- Glucose
Q. 12 of Quiz- (Que-ID : 3380)
Statins used for lowering blood cholesterol level are extracted from
- algae
- bacteria
- viruses
- yeast
Q. 6 of Quiz- (Que-ID : 3324)
Which of the following pathogens causes whooping coough ?
- Legionella spp.
- Burcella melitensis
- Vibrio cholerae
- Burcella melitensis
Q. 23 of Quiz- (Que-ID : 3066)
Acetyl CoA combine with oxalo-acetate in presence of condensing enzyme citrate synthase to form 6-C compound called
- Malic acid
- Tartaric acid
- Pyruvic acid
- Citric acid
Q. 16 of Quiz- (Que-ID : 3459)
Habitat together with functions of a species constitute its:
- Topography
- Trophic level
- Boundary
- Ecological niche
Q. 2 of Quiz- (Que-ID : 2820)
Which of the following options shows bisexual animals only?
- Amoeba, sponge, leech
- Sponge, cockroach, Amoeba
- Earthworm, sponge, leech
- Tapeworm, earthworm, honeybee
Q. 1 of Quiz- (Que-ID : 3519)
Which chemical substance affects the Ozone Layer?
- Chlorofluorocarbon
- Chlorine
- Hexafluorocarbon
- Molecular Carbon
Q. 1 of Quiz- (Que-ID : 3294)
Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution ?
- Development of transgenic animals
- Production of “Dolly’, the sheep by cloning
- Prevalence of pesticide resistant insects
- Development of organs from ‘stem cells’ for organ transplantation.
Q. 22 of Quiz- (Que-ID : 3390)
Process of biogas production is
- aerobic process
- anaerobic process
- active process
- passive process
Q. 24 of Quiz- (Que-ID : 3067)
Number of oxygen atoms required for aerobic oxidation of one pyruvate
- 10
- 8
- 5
- 12
Q. 6 of Quiz- (Que-ID : 3474)
Water co-deficient contains:
- Large thin walled cells
- Large-vacuoles
- Membrane
- All of these
Q. 1 of Quiz- (Que-ID : 2969)
Which among the following is not ammonotelic
- Aquatic amphibian
- Aquatic insect
- Bony fishes
- Mammal
Q. 9 of Quiz- (Que-ID : 2902)
In oocyte secondary maturation occurs in
- ovary
- abdominal cavity
- Fallopian tube
- uterus.
Q. 2 of Quiz- (Que-ID : 2745)
Secretin cause stimulation of
- Bile juice
- Water
- Gastric secretion
- Pepsinogen
Q. 10 of Quiz- (Que-ID : 2753)
Choose the incorrect statement
- Hormones are non-nutrients chemicals
- Exocrine glands are ductless glands
- Invertebrates have simple endocrine system
- All of the above statements are incorrect
Q. 16 of Quiz- (Que-ID : 3209)
After the secondary growth, the oldest layer of secondary phloem in a dicot stem is located
- just outside the vascular cambium
- just inside the vascular cambium
- just inside the vascular phloem
- just outside the secondary xylem
Q. 24 of Quiz- (Que-ID : 2967)
Amino acids which are specified by single codons are
- phenylalanine and arginine
- tryptophan and methionine
- valine and proline
- methionine and aroinine
Q. 9 of Quiz- (Que-ID : 3527)
Nutrient enrichment of water bodies causes
- Stratification
- Eutrophication
- Succession
- None of these
Q. 10 of Quiz- (Que-ID : 2878)
The correct surgical procedure as a contraceptive method is
- ovariectomy
- hysterectomy
- vasectomy
- castration
Q. 9 of Quiz- (Que-ID : 2702)
Name a disorder which occurs due to rapid spasm in muscles due to low ca2+ in body fluid
- Tetany
- Arthritis
- Myasthenia gravis
- Gout
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