Dicot seed - class-IX
Description: dicot seed | |
Number of Questions: 27 | |
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Tags: the life cycle of plants seeds - structure and germination getting to know plants seed plants: structure and function pollination plants: parts and functions biology structure and functions of living organisms -i the flower |
Plants with single whorl of perianth are placed under
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Class - Monocot, Sub class - Monochlamydeae
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Class - Dicot, Series - Monochlamydeae
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Class - Dicot, Sub class - Monochlamydeae
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Class - Monocot, Sub class - Gamopetalae
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Class - Dicot, Series - Bicarpellatae
Monochlamydeous flower has only one accessory whorl present (perianth). For example, Polygonaceae and Liliaceae.
The only dicot family bearing six cotyledons is
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Leguminosae
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Compositae
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Orchidaceae
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Loranthaceae
The only dicot family bearing six cotyledons is Loranthaceae. The Loranthaceae are a family of flowering plants, which has been universally recognized by taxonomists. It consists of about 75 genera and 1,000 species of woody plants, many of them hemiparasites, all of them except three having the mistletoe habit.
A dicot exalbuminous seed is
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Pea
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Ester
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Rice
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Wheat
Pea is a dicot exalbuminous seed. In the non-endospermic dicotyledons the endosperm is absorbed by the embryo as the latter grows within the developing seed and the cotyledons of the embryo become filled with stored food. At maturity, seeds of these species have no endosperm and are also referred to as exalbuminous seeds. The exalbuminous seeds include the legumes such as beans and peas.
Therefore, the correct answer is option A.
Fruit of a groundnut is
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Lomentum
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Siliqua
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Caryopsis
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Nut
The fruit of a groundnut is a lomentum. In botanical terms, nut specifically refers to indehiscent fruit, the peanut is not technically a nut, but rather a legume and its fruit is a lomentum. Lomentum is a dry fruit of certain leguminous plants, having constrictions between the seeds and separating at maturity into one-seeded segments. A loment (or lomentum) is a type of indehiscent legume fruit that breaks apart at constrictions occurring between segments, so that each segment contains one seed. It is a type of schizocarp.
Thus, the correct answer is option A.
Some plants of Angiosperms are called as dicotyledons, because their seedlings contain
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Three cotyledons
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Two cotyledons
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Many cotyledons
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Four cotyledons
Dicots have floral parts in multiples of four or five, and their seeds contain two cotyledons. The cotyledons usually absorb the food from the endosperm first, and then provide the food for the embryo.
Bentham and Hooker classified dicots into
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Polypetalae, gamopetalae and glumiflorae
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Polypetalae, gamopetalae and monochlamydae
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Achlamydae, diclamydeae and metachlamydae
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Archichlamydae, sympetalae and apetalae
- The Bentham and hooker classification system compromises of the following main groups in Class DICOTYLEDONES:
- POLYPETALE
- GAMOPETALAE
- MONOCHLAMYDAE.
- Hence, Bentham and Hooker classified dicots into Polypetalae, gamopetalous and monochlamydae.
- So, the correct answer is 'Polypetalae, gamopetalae and monochlamydae'.
The active growing region in a dicot embryo which forms shoot is
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Epicotyl
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Cotyledon
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Coleoptile
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Plumule
The active growing region in a dicot embryo which forms shoot is the plumule. The plumule is the young shoot of a plant embryo above the cotyledons, consisting of the epicotyl and often of immature leaves. The young shoot or plumule, is said to be negatively geotropic, because it moves away from the soil it rises by the extension of either the hypocotyl.
Thus, the correct answer is option D.
The botanical name of ground nut is
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Cicer arietinum
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Glycine max
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Arachis hypogea
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Lens esculentus
The peanut or groundnut (Arachis hypogaea) is a species in the family Fabaceae. The peanut was probably first domesticated and cultivated in the valleys of Paraguay. It is an annual herbaceous plant growing 30 to 50 cm tall. Because, in botanical terms, nut specifically refers to indehiscent fruit, the peanut is not technically a nut, but rather a legume. Peanuts are often served in a similar manner to true nuts in many Western cuisines, and are often referred to as a nut in common English.
Thus, the correct answer is option C.
Root cap in dicots is formed from
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Protoderm
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Ground meristem
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Calyptrogen
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Procambium
Protoderm is a type of primary meristem which has developed from apical meristem. It forms the outermost epidermis which is responsible for root cap formation.
Thus, the correct answer is option A.
Eustele is present in
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Bryophytes
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Pteridophytes
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Dicots
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None of the above
Vascular tissue in dicot stem consists of many vascular bundles which are arranged in the form of broken ring known as eustele.
The reticulate venation is commonly found in the leaves of
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Monocot plants
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Dicot plants
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Bryophytes
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Thallophytes
Reticulate venation is the arrangement in which the veins of the leaf cross each other around the midrib. It may be unicostate or multicostate depending on the number of mid-ribs and lobes of the leaf. For example, dicot plant.
Thus, the correct answer is option B.
Cotyledons constitute the first pair of leaves in
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Castor
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Maize
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Pea
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Gram
A. Embryo lies in the centre of endosperm. It consists of a radicle, a plumule and two lateral cotyledons, all of which are present on a short embryo axis. The cotyledons are thin, semi-transparent and oval in outline. They have palmate venation. The middle costa or rib is more prominent and bears a few lateral veins.
B. Maize- Cotyledons store food material for the embryo.
C. Pea- Cotyledons store food material for the embryo.
The most vast dicot family is
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Fabaceae
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Compositae
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Orchidaceae
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Loranthaceae
The production of vast amount of grain is one of the most outstanding outcome of modern agriculture. Poaceae (monocot) and fabaceae (dicot) contribute to the species, that are responsible for the vast majority of grain production worldwide.
Which among dicotyledons are considered to have most primitive genera?
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papilionaceae (Crotolaria sp.)
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Cucurbitaceae (Cucurbita sp)
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Magnoliaceae (Magnolia sp.)
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Rosaceae (Rosa sp.)
The earliest known flowering plants date back to about 130 million years ago. According to Cronquist (evolution and classification of flowering plants, 1988), the most primitive of all living angiosperms belong to the subclass Magnoliidae. This subclass contains several primitive plant families, including the water-lily family (Nymphaeaceae), buttercup family (Ranunculaceae) and magnolia family (Magnoliaceae).
Non-porous wood is found in __________.
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Dicot
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Monocot
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Gymnosperm
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Pteridophytes
Non porous woods are found in gymnosperms. Non porous wood are the wood which do not permit transfer of water or air.
The botanical name of ground nut is
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Cicer arietinum
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Glycine max
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Arachis hypogaea
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Lens esculentus
Arachis hypogaea is the botanical name of peanut or groundnut. It is an annual herbaceous plant in the Fabaceae (legume or bean family). Although appearing as and referred to as a nut, it is actually the underground pod of a legume, rather than a true nut.
Cork of dicot stem comprises of
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Phelloderm
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Phellem
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Phellogen
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Phloem
Pea nut or Ground nut oil is obtained from
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Lathyrus odoratus
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Pisum sativum
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Arachis hypogea
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Glycine max, Brassica juncea
The peanut or groundnut (Arachis hypogaea) is a species in the family Fabaceae. The peanut was probably first domesticated and cultivated in the valleys of Paraguay. It is an annual herbaceous plant growing 30 to 50 cm tall. Peanut oil is often used in cooking, because it has a mild flavor and a relatively high smoke point. Due to its high monounsaturated content, it is considered healthier than saturated oils and is resistant to rancidity. There are several types of peanut oil including aromatic roasted peanut oil, refined peanut oil, extra virgin or cold pressed peanut oil and peanut extract. In the United States, refined peanut oil is exempt from allergen labeling laws.
Peanut oil is not obtained from Lathyrus odoratus (sweet pea), Pisum sativum (garden pea), Glycine max (soya) or Brassica juncea (mustard).
Therefore, the correct answer is option C.
In plants, during embryonic condition
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All cells of the embryo divide.
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Meristematic activity is confined to single apical cell.
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Meristematic activity is confined to a group of apical cells.
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Apical and lateral cells only divide.
Embryonic tissue in plants refers to the actively growing cells but more than often this term is used to describe the early formation of tissue during its first growth stages. It thus refers to the sporophyte, gametophyte embryos from seedlings as well as meristematic tissues which are always in embryonic state. Under this condition, the growth of this tissues takes place through cell division and the cells of the embryo divide.
Only dicotyledon with parallel venation is
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Helianthus
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Calophyllum
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Riccinus
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All of the above
Dicots showing parallel venation are Calophyllum and Corymbium.
Caruncle is derived from
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Peduncle
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Cotyledon
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Outer integument
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Inner integument
Pea nut or ground nut oil is obtained from
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Lathyrus odoratus
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Pisum sativum
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Arachis hypogea
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Brassica juncea
Peanut (Arachis hypogaea) oil is the refined fixed oil obtained from the seed kernels of Arachis hypogaea. Hydrogenated peanut oil, peanut acid, and peanut glycerides are all derived from peanut oil. It is light yellow-colored oil and extremely stable, with nourishing and protective properties.
In which of the following, multiciliated/multiflagelated
anthropoids are present
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Riccia and Funaria
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Pteris and Cycas
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Riccia and Cycas
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Marchantia and Riccia
In pt eris antheridum is having (about 32) multiflagellated, coiled (2 - 3 coils) anthropoids or spermatozoids.
X is scar on the seed through which the developing seeds were attached to the fruit; above the X is a small pore called Y.
Identify X and Y and select the correct option.
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X - Micropyle, Y - Hilum
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X - Hilum, Y - Micropyle
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X - Testa, Y - Tegmen
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X - Chalaza, Y - Micropyle
X - Hilum - it is the point of attachmnet of the ovule to its stalk or the funicle
In dicots the most common pollen tetrad is?
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Isobilateral
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Tetrahedral
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Linear
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Decussate
A dicot plant lacking cotyledons is
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Cuscuta
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Santalum
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Lodoicea
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None of the above
Cuscuta is a plant whose embryos lack cotyledons. It is called dicot plant because the stem of cuscuta has as dicot structure.
In Groundnut, oil is stored in
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Embryo axis
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Endosperm
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Cotyledons
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None of the above
In groundnut, oil is stored in the seeds cotyledons. It is a legume plant. Each seed of groundnut has 2 cotyledons.