Description : In bryophytes and pteridophytes, transport of male gametes requires
Last Answer : In bryophytes and pteridophytes, transport of male gametes requires (A) Birds (B) Water (C) Wind (D) Insects
Description : The independent structure developed in pteridophytes which produces male and female gametes is
Last Answer : Prothallus.
Description : Read the following five statements (A to E) and select the option with all correct statements. A. Mosses and lichens are the first organisms to colonise a bare rock. B. Selaginella is a homosporous pteridophyte. C. Coralloid roots in Cycas ... D and E (b) B, C and E (c) A, C and D (d) B, C and D
Last Answer : (a) A, D and E
Description : Similarities between bryophytes and pteridophytes? -Biology
Last Answer : answer:
Description : Compare the gametophyte and sporophyte of Bryophytes with that of Pteridophytes.
Last Answer : Compare the gametophyte and sporophyte of Bryophytes with that of Pteridophytes.
Description : Double fertilization is found in: (a) Bryophytes (b) Angiosperms (c) Gymnosperms (d) Pteridophytes
Last Answer : Ans. ((b))
Description : Which of the following are mostly woody trees, always perennials and never herbs or annuals? (a) Angiosperms (b) Gymnosperms (c) Pteridophytes (d) Bryophytes
Last Answer : Ans:(b)
Description : Our major foods, fibres, spices, fruits and beverage crops are (a) Flowering plants (b) Gymnospermous plants (c) Pteridophytes (d) Bryophytes
Last Answer : Ans:(a)
Description : Pollination occurs in (a) bryophytes and angiosperms (b) pteridophytes and angiosperms (c) angiosperms and gymnosperms (d) angiosperms and fungi.
Last Answer : (c) angiosperms and gymnosperm
Description : .A well developed archegonium with neck consisting of 4-6 rows and neck canal cells, characterises (a) gymnosperms and flowering plants (b) pteridophytes and gymnosperms (c) gymnosperms only (d) bryophytes and pteridophytes
Last Answer : d) bryophytes and pteridophytes.
Description : .Multicellular branched rhizoids and leafy gametophytes are the characteristics of (a) some bryophytes (b) pteridophytes (c) all bryophytes (d) gymnosperms.
Last Answer : (a) some bryophytes
Description : In which of the following would you place the plants having vascular tissue lacking seeds? (a) Pteridophytes (b) Gymnosperms (c) Algae (d) Bryophytes
Last Answer : (a) Pteridophytes
Description : Pteridophytes differ from mosses/bryophytes in possessing (a) independent gametophyte (b) well developed vascular system (c) archegonia (d) flagellate spermatozoids.
Last Answer : (b) well developed vascular system
Description : Pteridophytes differ from bryophytes and thallophytes in having (a) vascular tissues (b) motile antherozoids (c) archegonia (d) alternation of generations
Last Answer : (a) vascular tissues
Description : Absorptive heterotrophic nutrition is exhibited by (a) algae (b) fungi (c) bryophytes (d) pteridophytes.
Last Answer : (b) fungi
Description : Assertion: Several organisms belonging to monera,fungi,algae and bryophytes produces gametes by mitosis. Reason: the plant body of the monera, fungi,a
Last Answer : Assertion: Several organisms belonging to monera,fungi,algae and bryophytes produces gametes by mitosis. ... , fungi,algae and bryophytes is haploid.
Description : Pollination in water hyacinth and water lily is brought about by the agency of (a) water (b) insects or wind (c) birds (d) bats.
Last Answer : b) insects or wind
Description : What type of pollination takes place in Vallisneria? (a) Pollination occurs in submerged condition by water. (b) Flowers emerge above surface of water, and pollination occurs by insects. (c) Flowers ... wind. (d) Male flowers are carried by water currents to female flowers at surface of water.
Last Answer : (d) Male flowers are carried by water currents to female flowers at surface of water
Description : Bryophytes are often called as amphibian plant because they : (1) appear like frog (2) are found both in water and on land (3) do not have habitat preference (4) can eat insects
Last Answer : (2) are found both in water and on land Explanation: Bryophytes are simple low growing plants, anchored to the ground or to tree bark by tiny filamentous rhizoids.
Last Answer : are found both in water and on land
Description : What is the function of germ pore? (a) Emergence of radicle (b) Absorption of water for seed germination (c) Initiation of pollen tube (d) Release of male gametes
Last Answer : (c) Initiation of pollen tube
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.
Description : How are male and female gametes production different?
Last Answer : In males 4 sperms are produced from one cell while in female 1egg and 3 polar bodies are produced in mammals .
Description : Where are Male gametes are produced?
Last Answer : Need answer
Description : What are the reproductive organs that produce gametes in both male and female?
Last Answer : That would be the Gonads.
Description : In gymnosperms, the male gametes are produced in structures called
Last Answer : microsporophyll.
Description : Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.
Last Answer : (a) two polar nuclei and one male gamete
Description : In angiosperms, pollen tube liberate their male gametes into the (a) central cell (b) antipodal cells (c) egg cell (d) synergids.
Last Answer : d) synergids.
Description : Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.
Last Answer : (d) syngamy and triple fusion.
Description : What is the fate of the male gametes discharged in the synergid? (a) One fuses with the egg and other fuses with central cell nuclei. (b) One fuses with the egg, other(s) degenerates in the synergid. (c) All fuse with the egg. (d) One fuses with the egg, other(s) fuse(s) with synergid nucleus.
Last Answer : (a) One fuses with the egg and other fuses with central cell nuclei.
Description : Male gametes in angiosperms are formed by the division of (a) generative cell (b) vegetative cell (c) microspore mother cell (d) microspore.
Last Answer : (a) generative cell
Description : The plant parts which consist of two generations- one within the other (1) pollen grains inside the anther (2) germinated pollen grain with two male gametes (3) seed inside the fruit (4) embryo sac inside the ovule (a) (1) only (b) (1), (2), and (3) (c) (3) and (4)
Last Answer : (d) (1) and (4).
Description : Erythroblastosis fetalis is caused when fertilisation takes place between gametes of (a) Rh– female and Rh+ male (b) Rh+ female and Rh– male (c) Rh+ female and Rh+ male (d) Rh– female and Rh– male.
Last Answer : (a) Rh– female and Rh+ male
Description : Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characterised features of (a) cycads (b) conifers (c) polypetalous angiosperms (d) gamopetalous angiosperms.
Last Answer : (a) cycads
Description : Flagellated male gametes are present in all the three of which one of the following sets? (a) Zygnema, Saprolegnia and Hydrilla (b) Fucus, Marsilea and Calotropis (c) Riccia, Dryopteris and Cycas (d) Anthoceros, Funaria and Spirogyra
Last Answer : (c) Riccia, Dryopteris and Cycas
Description : Male gametes are flagellated in (a) Ectocarpus (b) Spirogyra (c) Polysiphonia (d) Anabaena
Last Answer : (a) Ectocarpus
Description : Double fertilization is (1) Fusion of two male gametes of a pollen tube with two different eggs (2) Fusion of one male gamete with two polar nuclei (3) Fusion of two male gametes with one egg (4) Syngamy and triple fusion
Last Answer : (4) Syngamy and triple fusion
Description : Which of the following is not a characteristic of coniferales........ a)pycnoxylic wood b)motile male gametes c)presence of resin canal d) fertilization siphonogamous
Last Answer : b)motile male gametes
Description : Which of the following describes the major difference between bryophytes (pron: bry-oh-fites) and tracheophytes (pron: tray-key-o-fites)? a) tracheophytes can survive on land b) ... inside fruits c) tracheophytes can make their own food d) tracheophytes have vessels to transport materials
Last Answer : ANSWER: D -- TRACHEOPHYTES HAVE VESSELS TO TRANSPORT MATERIALS
Description : Water flows off the wings of birds and insects due to the presence of - (1) Waxes (2) Sugars (3) Proteins (4) Minerals
Last Answer : (1) Waxes Explanation: Insects and birds have the simplest surface waxes that serve to water proof feathers. These consist of long chain hydrocarbons. The interlocking feather barbs and a ... pathogens, the total surface was layer certainly functions to prevent microbial entry into the organism.
Description : Uricotelism is found in (a) mammals and birds (b) fish and fresh water protozoans (c) birds, land reptiles and insects (d) frogs and toads.
Last Answer : (c) birds, land reptiles and insects
Description : Water flows off the wings of birds and insects due- to the presence of (1) Waxes (2) Sugars (3) Proteins (4) Minerals
Last Answer : Waxes
Description : What insects chirp like birds but it happens only at night?
Last Answer : Could it be locusts or cicadas? They don’t only chirp at night, but the sound is just hideous to me. I was going to add some videos of the different chirps, but the sound was driving my dogs crazy.
Description : Wings of insects and wings of birds are the example of :
Last Answer : Wings of insects and wings of birds are the example of : A. Analogy B. Homology C. Secrology D. Mimicry
Description : In the process of eating the remains of dead organisms and their wastes earthworms aerate and fertilize the soil. They are also a source of food for many birds snakes and insects. Which term best desc?
Last Answer : Decomposer
Description : Omithophily is effected by – (1) snails (2) bats (3) insects (4) birds
Last Answer : (4) birds Explanation: Omithophily or bird pollination is the pollination of flowering plants by birds. This coevolutionary association is derived from insect pollination (ento-mophily) and is particularly well ... in some parts of the world, especially in the tropics and on some island chains.
Description : Wings of birds and insects are – (1) Xenologous (2) Homologous (3) Paralogous (4) Analogous
Last Answer : (4) Analogous Explanation: Wings of birds and insects are analogous struetures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
Description : Entomology is the study of – (1) Birds (2) Insects (3) Fossils (4) Fungi
Last Answer : (2) Insects Explanation: Entomology is the scientific study of insects, a branch of arthropodolo„ (.w. which in turn is a branch of biology. It is derived from Lhe Greek word `entomos' which means "that which is cut in pieces or engraved/ segmented", hence "insect".
Description : “Ornithology” is the study of-------? A. Birds (Answer) B. Insects C. Sea Plants D. Sea Animals
Last Answer : A. Birds (Answer)
Description : Which one of the following have the highest number of species in nature? (a) Fungi (b) Insects (c) Birds (d) Angiosperms
Last Answer : (b) Insects