Structure of Male Reproductive Part

Q.

Why pollen grains are well preserved as fossil?

Q. Name the two parts in a flower in which the two most important units of sexual reproduction develop?

Q.

What does megasporangium mean?

Q. Which of the following groups of plants have underground stems?

1. Potato, cucumber, watermelon, zaminkand, Colocasia
2. Potato, ginger, turmeric, zaminkand, Colocasia
3. Potato, ginger, turmeric, Euphorbia, zaminkand
4. Potato, Citrus, Opuntia, zaminkand, Colocasia

Q. The secretion by ___________ helps the sperm to enter into the cytoplasm of the ovum.

1. zona pellucida of ovum
2. middle piece of sperm
3. cells of corona radiata
4. acrosome

Q. Identify X
Pollen grain : Male gametophyte :: Stamen : X

1. Microsporophyll
2. Megasporangium
3. Megasporophyll
4. Microsporangium

Q. Microsporangia and megasporangia are found in the same strobilus in:

1. Adiantum
2. Pinus
3. Dryopteris
4. Selaginella

Q. Which of the following has proved helpful in preserving pollen as fossils?

1. Oil content
2. Cellulosic intine
3. Pollenkitt
4. Sporopollenin

Q. Choose the protein not found in human sperm.

1. Hyaluronidase
2. Acrosin
3. Antifertilisin
4. Fertilisin

Q.

Differentiate between stamens and carpels.

Q.

Ubisch bodies are present in

1. Pollen tube

2. Pollen grains

3. Microspore

4. Tapetum

Q. Classify the following transverse section of anther into appropriate categories:

1. Bilobed, monothecous
2. Unilobed, monothecous
3. Unilobed, dithecous
4. Bilobed, dithecous

Q. Gaseous exchange in land plants takes place through stomatal openings while in submerged hydrophytes it takes place by

1. Stomata
2. Hyathodes
3. General surface of the cells by diffusion.
4. Lenticels

Q. Pollen grains have been found well-preserved in fossil. Choose the statement that gives the correct explanation.

1. Pollen grains form a cyst during unfavourable conditions
2. Intine is made of cellulose and pectins
3. Exine is made up of sporopollenin
4. Germ pores were closed to avoid entry of water

Q. What types of structures are formed at the end of micro and megasporogenesis?

Q. Carpels are equivalent to the :

1. Microsporophylls
2. Megasporophylls
3. Megasporangia
4. Embryo sac

Q. Assertion :A typical microsporangium of angiosperms is generally surrounded by four wall layers- epidermis, endothecium, middle layers and tapetum. Reason: The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. The anthesis is a phenomenon, which refers to

1. Development of anthers
2. Stigma receptors
3. All of these
4. Opening of flower bud

Q. Ubisch bodies are present in

1. Pollen grain
2. Microspore
3. Tapetum
4. Pollen tube

Q.

Which Type Of Endosperm Is Found In Cereals?

Q. A typical dithecous anther in angiosperms is:

1. Unisporangiate
2. Bisporangiate
3. Trisporangiate
4. Tetrasporangiate

Q. Regarding the cross-pollination, which of the following statement is incorrect?

1. 
   Plants use two abiotic and one biotic agent
2. Majority of plants use abiotic agents for pollination
3. 
   Production of enormous amount of pollen grains is concerned to compensate uncertainty and loss of pollens
4. 
   Pollination by wind is more common among abiotic pollinations

Q. Winged pollengrains are the characteristic feature of?

1. Cycas
2. Ephedra
3. Pinus
4. Gnetum

Q. Antheridia and archegonia are absent in

1. Bryophyta
2. Pteridophyte
3. Gymnosperms
4. Angiosperms

Q. Assertion :Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation. Reason: Sporopollenin is absent in the region of germ pores.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. The ubisch bodies are present in

1. Pollen tube
2. P.M.C
3. Tapetal cells
4. Pollen grain

Q. Fertilisin protein is present in:

1. Polar bodies
2. Mature oocyte
3. Acrosome
4. Middle piece of sperm

Q. Draw a neat labelled diagram of T.S of young anther.

Q. Choose the correct description of the flower depicted in the floral diagram given below.

1. United, valvate sepals; free, imbricate petals; free stamens; unilocular ovary with axile placentation
2. United, valvate sepals; free, twisted petals; free stamens; unilocular ovary with basal placentation
3. United, valvate sepals; free, imbricate petals; free stamens; unilocular ovary with marginal placentation
4. United, valvate sepal; free, imbricate petals, epipetalous stamens; unilocular ovary with marginal placentation

Q. A typical dithecous anther in angiosperms is:

1. Unisporangiate
2. Bisporangiate
3. Trisporangiate
4. Tetrasporangiate