Description : $ Protonema is found in the life cycle of Liverworts. ! Liverworts have multicellular rhizoids.
Last Answer : $ Protonema is found in the life cycle of Liverworts. ! Liverworts have multicellular rhizoids. A. If both ... wrong D. If both As and R are wrong.
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 : Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because (a) female gametophyte is free and gets dispersed like seeds (b) female gametophyte ... by seed coat (d) embryo develops in female gametophyte which is retained on parent sporophyte.
Last Answer : (b) female gametophyte lacks archegonia
Description : Which of the following statements is correct? (a) Ovules are not enclosed by ovary wall in gymnosperms. (b) Selaginella is heterosporous, while Salvinia is homosporous. (c) Horsetails are gymnosperms. (d) Stems are usually unbranched in both Cycas and Cedrus.
Last Answer : (a) Ovules are not enclosed by ovary wall in gymnosperms.
Description : Which of the following statement is correct ? (1) Ovules are not enclosed by ovary wall in gymnosperms (2) Selaginella is heterosporous, while Salvinia is homosporous (3) Horsetails are gymnosperms (4) Stems are usually unbranched in both Cycas and Cedrus
Last Answer : (1) Ovules are not enclosed by ovary wall in gymnosperms
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 : Which one has the largest gametophyte? (a) Cycas (b) Angiosperm (c) Selaginella (d) Moss
Last Answer : (d) Moss
Description : Examine the given figure and select the correct option giving all the four parts (A, B, C and D) rightly identified. A B C D (a) Archego- Female Gemma Rhizoids niophore thallus cup ( ... thallus (c) Seta Sporo- Proto- Rhizoids phyte nema (d) Antherid- Male- Globule Roots iophore thallus
Last Answer : (a) Archego- Female Gemma Rhizoids niophore thallus cup
Description : $ A simple but dominant gametophyte is called Prothallus. ! Prothallus is found in Bryophytes.
Last Answer : $ A simple but dominant gametophyte is called Prothallus. ! Prothallus is found in Bryophytes. A. If both As ... wrong D. If both As and R are wrong.
Description : $ The zyhote developes into a multicellular organisms. ! Each cell is totipotent.
Last Answer : $ The zyhote developes into a multicellular organisms. ! Each cell is totipotent. A. If both As and R are ... is wrong D. If both As and R are wrong.
Description : $ Progenote is considered to be the more ancient form of life which gave rise to archaeobacteria and eubacteria. ! Monomers are always multicellular.
Last Answer : $ Progenote is considered to be the more ancient form of life which gave rise to archaeobacteria and eubacteria ... D. If both As and R are wrong.
Description : $ Cellular totipotency means that single cell can give rise to a fully grown multicellular organisms ! Meristematic cells are also called "stem cells"
Last Answer : $ Cellular totipotency means that single cell can give rise to a fully grown multicellular organisms ! Meristematic ... D. If both As and R are wrong.
Description : Explain development of female gametophyte in a flowering plant. -Biology
Last Answer : answer:
Description : Which is the structure in which the female gametophyte develops? -Biology
Description : In pines the female gametophyte contains? -Biology
Description : Why is the embryo sac called the female gametophyte? -Biology
Description : Female gametophyte of angiosperms is represented by (a) ovule (b) megaspore mother cell (c) embryo sac (d) nucellus.
Last Answer : (c) embryo sac
Description : Read the following five statements (A - E) and answer as asked next to them. (A) In Equisetum, the female gametophyte is retained on the parent sporophyte. (B) In Ginkgo, male gametophyte is not independent. (C ... . How many of the above statements are correct? (a) Two (b) Three (c) Four (d) One
Last Answer : (d) One
Description : Which one of the following is a correct statement? (a) Pteridophyte gametophyte has a protonemal and leafy stage. (b) In gymnosperms, female gametophyte is free- living. (c) Antheridiophores and ... are present in pteridophytes. (d) Origin of seed habit can be traced in pteridophytes.
Last Answer : (d) Origin of seed habit can be traced in pteridophytes.
Description : Name the parts of angiospermic flowers in which development of male and female gametophyte takes place.
Last Answer : Ans: Anther and Ovary
Description : What is meant by monosporic development of female gametophyte?
Last Answer : Ans: The method of embryo sac formation from single megaspore is called monosporic development.
Description : In angiosperm female gametophyte is: a) Embryo b) Egg Apparatus c)Embryo sac d) synergids
Last Answer : Ans: c)Embryo sac
Description : Female gametophyte of Gnetum follows the developmental pattern of ..... a) tetrasporic type b) bisporic type c) monosporic type d) none of the above.
Last Answer : a) tetrasporic type
Description : 85. Which one of the following is a correct statement ? (1) Origin of seed habit can be traced in pteridophytes (2) Pteridophyte gametophyte has a protonemal and leafy stage (3) In gymnosperms female gametophyte is free-living (4) Antheridiophores and archegoniophores are present in pteridophytes
Last Answer : Origin of seed habit can be traced in pteridophytes
Description : How rhizoids in liverworts differ from that of mosses?
Last Answer : How rhizoids in liverworts differ from that of mosses?
Description : A plant growing on moist soil has a thalloid body, rhizoids and archegonium. To which group of Metaphyta do you include it? Give one example of the group.
Last Answer : The plant belongs to bryophyte Ex: Riccia, Funaria etc.
Description : What are rhizoids?
Last Answer : Rhizoids are the root like extensions present in bryophytes.
Description : The structures that help some bacteria to attach to rocks and/or host tissues are (a) mesosomes (b) holdfast (c) rhizoids (d) fimbriae.
Last Answer : (d) fimbriae.
Description : Examples of homosporous pteridophytes. -Biology
Description : Difference between homosporous and heterosporous pteridophytes -Biology
Description : Select the correct statement. (a) Sequoia is one of the tallest trees. (b) The leaves of gymnosperms are not well adapted to extremes of climate. (c) Gymnosperms are both homosporous and heterosporous. (d) Salvinia, Ginkgo and Pinus all are gymnosperms.
Last Answer : (a) Sequoia is one of the tallest trees.
Description : Select the mismatch. (a) Cycas – Dioecious (b) Salvinia – Heterosporous (c) Equisetum – Homosporous (d) Pinus – Dioecious
Last Answer : (d) Pinus – Dioecious
Description : Bryophytes are dependent on water, because (a) water is essential for their vegetative propagation (b) the sperms can easily reach upto egg in the archegonium (c) archegonium has to remain filled with water for fertilization (d) water is essential for fertilization for their homosporous nature.
Last Answer : (b) the sperms can easily reach upto egg in the archegonium
Description : Select the mismatch (1) Cycas – Dioecious (2) Salvinia – Heterosporous (3) Equisetum – Homosporous (4) Pinus – Dioecious
Last Answer : (4) Pinus – Dioecious
Description : Distinguish between homosporous and heterosporous condition in pteridophytes.
Last Answer : Ans: Majority of pteridophytes are homosporous.All spores produced od similar type. Example: Psilotum Heterosporous pteridophytes produce macro and microspores. Example: Selaginella.
Description : Heterospory in Selaginella -Biology
Description : .Match items in column I with those in columnII. Column I Column II (A) Peritrichous flagellation (J) Ginkgo (B) Living fossil (K) Macrocystis (C) Rhizophore (L) Escherichia coli (D) Smallest flowering plant (M) Selaginella (E) Largest perennial ... - M; E - J (d) A - J; B - K; C - N; D - L; E - M
Last Answer : (a) A - L; B - J; C - M; D - N; E - K
Description : A plant in which sporophytic generation is represented by zygote is (a) Pinus (b) Selaginella (c) Chlamydomonas (d) Dryopteris
Last Answer : (c) Chlamydomonas
Description : Which one is the most advanced from evolutionary view point? (a) Selaginella (b) Funaria (c) Chlamydomonas (d) Pinus
Last Answer : (d) Pinus
Description : Which one of the following is categorised under living fossils? (a) Pinus (b) Cycas (c) Selaginella (d) Metasequoia
Last Answer : (b) Cycas
Description : Examine the figures A, B, C and D. In which one of the four options all the items A, B, C and D are correct? A B C D (a) Chara Marchantia Fucus Pinus (b) Equisetum Ginkgo Selaginella Lycopodium (c) Selaginella Equisetum Salvinia Ginkgo (d) Funaria Adiantum Salvinia Riccia
Last Answer : (c) Selaginella Equisetum Salvinia Ginkgo
Description : Evolutionary important character of Selaginella is (a) heterosporous nature (b) rhizophore (c) strobili (d) ligule.
Last Answer : (a) heterosporous nature
Description : Which one of the following is not common between Funaria and Selaginella? (a) Archegonium (b) Embryo (c) Flagellate sperms (d) Roots
Last Answer : (d) Roots
Description : Resurrection plant is a. Spirogyra b. Selaginella c. Lichen d. Rhynia
Last Answer : b. Selaginella
Description : What is the reproductive advantage of Coniferous trees to drop their gametophyte containing pine cones during the winter?
Last Answer : So they're on the ground in the spring, when the have the best chance of beating out the smallish ground cover before they grow too big. If you're looking at a relatively mature forest, the saplings ... the ground cover, but if the ground cover were already there, they wouldn't make it above it.
Description : Difference between sporophyte and gametophyte -Biology
Description : Why is the sporophyte dependent on the gametophyte? -Biology
Description : When is gametophyte dependent on sporophyte? -Biology
Description : When does the sporophyte and gametophyte generation begin? -Biology
Description : Why is gametophyte dominant in moss? -Biology