10 - Science - 04. Biology - Reproduction In Plants
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This is the one of the methods of reproduction in unicellular organisms like amoeba and bacteria in which they split into two equal halves and produce new ones is called_________
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Fragmentation
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Binary fission
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Budding
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Spore formation
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Prepared By Mr. S. Ravikumar, B. T. Asst., GHS, Arangaldhurgam, Vellore District. & www. Padasalai. Net
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- 2.
In sexual reproduction of lowering plants, the first event involved in this is ___________
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Fertilization
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Germination
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Regeneration
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Pollination
Correct Answer
A. PollinationExplanation
In sexual reproduction of flowering plants, pollination is the first event that occurs. Pollination is the transfer of pollen from the male reproductive organ (anther) to the female reproductive organ (stigma) of a flower. This can occur through various means such as wind, water, or animal pollinators like bees or birds. Once pollination occurs, fertilization can take place, leading to the formation of seeds and fruits. Germination and regeneration are not directly related to the first event in sexual reproduction, making them incorrect options.Rate this question:
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- 3.
Which of the following statement is true?
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Thin walled non mobile spores are called zoospores
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A motile asexual spore produced by some algae bacteria and fungi are Akinetes
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Uninucleate non-motile asexual spores are produced by the fungus are called conidia
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Thick walled vegetative cells produced by the algae during adverse conditions are called aplanospores
Correct Answer
A. Uninucleate non-motile asexual spores are produced by the fungus are called conidiaExplanation
The correct answer is "Uninucleate non-motile asexual spores are produced by the fungus are called conidia." Conidia are a type of asexual spore produced by fungi that are uninucleate (contain only one nucleus) and non-motile (do not have the ability to move). These spores are important for the dispersal and reproduction of fungi.Rate this question:
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- 4.
The fertilized ovary is a fruit. The fruit develops from a single lower with multi carpellary, apocarpous superior ovary is _____
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Aggregate fruit
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Composite fruit
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Simple fruit
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Multiple fruit
Correct Answer
A. Aggregate fruitExplanation
An aggregate fruit is formed from a single flower with multiple separate carpels, each of which develops into a small fruit called a fruitlet. These fruitlets are attached to a central receptacle, giving the appearance of a single fruit. Therefore, the correct answer is aggregate fruit.Rate this question:
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- 5.
If a water soaked seed is pressed, a small drop of water comes out through _________
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Stomata
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Lenticel
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Micropyle
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Radicle
Correct Answer
A. MicropyleExplanation
When a water soaked seed is pressed, a small drop of water comes out through the micropyle. The micropyle is a small opening in the seed coat through which water can be released. This opening allows for the exchange of gases and the release of excess water, ensuring that the seed does not become waterlogged and can continue to respire properly.Rate this question:
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- 6.
The mango fruit is called as stone fruit. because it has _________
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Skinny epicarp
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Stony mesocarp
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Fleshy endocarp
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Hard endocarp Hard endocarp Hard endocarp
Correct Answer
A. Hard endocarp Hard endocarp Hard endocarpExplanation
The mango fruit is called a stone fruit because it has a hard endocarp. The endocarp is the innermost layer of the fruit, and in the case of mangoes, it is hard and stony. This hard endocarp surrounds the seed or pit of the fruit, giving it the characteristic of a stone fruit.Rate this question:
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- 7.
Pick out the wrong statement.
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In a dicot seed there is a short longitudinal whitish ridge is called the raphae
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There is a minute opening in dicot seed is known as micropyle.
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The rudimentary stem portion known as radicle.
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The rudimentary root portion is called radicle
Correct Answer
A. The rudimentary stem portion known as radicle.Explanation
The statement "The rudimentary stem portion known as radicle" is incorrect. The radicle is actually the rudimentary root portion of a seed, not the stem portion.Rate this question:
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- 8.
Consider the following statement regarding the dispersal of fruit by wind and select the correct answer.
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Fruits and seeds dispersed with a sudden jerk by an explosive mechanism.
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Fruits of tridax are carry a persistent calyx modified into pappus.
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The fruits of xanthium have sharp pointed stiff hooks.
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The mesocarp of coconut is fibres.
Correct Answer
A. Fruits of tridax are carry a persistent calyx modified into pappus.Explanation
The correct answer is "Fruits of tridax are carry a persistent calyx modified into pappus." This statement suggests that the fruits of tridax have a persistent calyx, which is a structure that typically withers and falls off after the fruit matures. However, in the case of tridax, the calyx is modified into a pappus, which helps in wind dispersal of the fruit. The pappus is a structure that aids in the dispersal of fruits and seeds by wind.Rate this question:
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- 9.
The product of triple fusion which acts as nutritive tissue for the development of embryo is ______
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Zygote
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Placenta
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Scutellum
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Endosperm
Correct Answer
A. EndospermExplanation
The endosperm is the correct answer because it is the tissue formed as a result of triple fusion in angiosperms. It acts as a nutritive tissue for the developing embryo, providing it with essential nutrients for growth and development. The endosperm is rich in starch, proteins, and other nutrients, and it is usually consumed by the growing embryo during germination.Rate this question:
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- 10.
The disadvantage of self pollination is _______
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There is no wastage of pollen grains
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The seeds are less in number
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Self pollination is sure in bisexual flowers
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Flowers need not depend on agents of pollination
Correct Answer
A. The seeds are less in numberExplanation
The disadvantage of self pollination is that the seeds produced are less in number.Rate this question:
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Dec 01, 2013Quiz Created by
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