Tag: phanerogams
Questions Related to phanerogams
In angiosperms, the chalazal megaspore undergoes mitosis how many times?
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Never
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Twice
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Thrice
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Repeatedly
Identify the incorrect statement.
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In over $60$ percent of angiosperms, pollen grains all shed at $2$-celled stage
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In less than $40$ percent species of angiosperms pollination occurs at $3$-celled stage of pollen grains
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Intine of pollen grain is made up of cellulose and pectin
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Pollen grains of a few species cause severe allergies and bronchial
What are cotyledons?
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They are the leaves of embryo.
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They are the leaves.
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They are the stems of embryo.
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None of the above.
Cotyledons are the leaves of embryo. Their number is either one or two. Sometimes, they store food materials and become fleshy.
Angiosperms were the first plants to have
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Petals
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Seed coats to protect seeds
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Fleshy fruit
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All of the above
.......... is an example of monocot.
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Nutmeg
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Maize
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Cinnamon
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Sunflower
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Both B and C
- Monocot plants seeds have one cotyledon. Rice, wheat, maize, bamboo, palm, banana, ginger, onion, garlic, lilies, daffodils, iris, orchids, bluebells, tulips, amaryllis are examples of monocots.
The plants whose seeds have only one cotyledon are called as
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Monocots
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Dicots
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Biennials
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Annuals
Angiosperms are also called as flowering plants. Monocots contain a single cotyledon as because the endosperm needed to nourish is not present outside the seed leaf. Therefore, the correct answer is option A.
Sunflower is a
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Dicot
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Monocot
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Pteridophyte
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Nonflowering plant
Sunflower is a dicot plant meaning that it produces two cotyledons. Dicots produce two leaves when they first germinate. The leaves of a dicot vary in shape and size, with the veins extending out from the center. Roots of a dicot are tough and branched. A sunflower seed is a dicot that contains the characteristic double cotyledon. The cotyledon, also known as a seed leaf, holds food reserves for the developing seed. Sunflower is a flowering plant and not a monocot or pteridophyte.
An example of angiosperm (closed-seeded plant) is
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Mango
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Cycas
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Pinus
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Ginkgo
Angiosperms are the flowering plants. Their seeds develop inside a female reproductive part of the flower, called as the ovary, which usually ripens into a protective fruit. Gymnosperms do not have flowers or ovaries. Their seeds mature inside cones. Seeds may be carried away from the parent plant by wind, water, or animals. Mango is an angiosperm. Cycas, Ginkgo and Pinus are gymnosperms.
Phanerogamae having vascular tissue and reproductive tissue
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Thallophyta
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Bryophyta
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Phanerogamae
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All of above
Thallophyta and bryophyta are cryptogams. They do not have vascular tissue and reproductive tissue, they are non-vascular plants and they reproduce asexually by formation of spores. They are flowering plants and have vascular and reproductive tissue.
The plants whose seeds have two cotyledons are called as
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Monocots
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Dicots
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Biennials
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Annuals
Angiosperms are also called as flowering plants. They are classified based on characteristics that include cotyledon structure, pollen grains, as well as flower and vascular tissue arrangement. Basal angiosperms, classified separately, contain features found in both monocots and dicots, as they are believed to have originated before the separation of these two main groups. Monocots contain a single cotyledon and have veins that run parallel to the length of their leaves; their flowers are arranged in three to six-fold symmetry. Dicots have flowers arranged in whorls, two cotyledons, and a vein arrangement that forms networks within their leaves.