Importance of Tapetum

Q. Explain the role of tapetum in the formation of pollen grain wall

Q.

Male gametophyte of angiosperms/monocots is

1. Nucellus

2. Microsporangium

3. Stamen

4. Microspore

Q.

Explain the role of tapetum in the formation of pollen grain wall.

Q. Multinucleated cells are present in

1. pollen tube
2. pollen grain
3. microspore
4. tapetum

Q.

Which of the following is incorrect with respect to the tapetum?

1. It possess dense cytoplasm and generally have one nucleus

2. It is the innermost layer of anther wall.

3. It nourishes the developing pollen grains

4. It surrounds the inner sporogenous tissue

Q.

Which gland is only found in males?

Q. The germ pores in the pollen grain are the regions ________.

1. that can withstand high temperature and strong acids and alkalis
2. through which sperms are released into the female gametophyte
3. which are made up of cellulose and pectin.
4. which lack sporopollenin

Q. The microspore tetrad of angiosperm at the time of formation, are surrounded by a callose wall. Breakdown of this wall is brought about by the enzyme callase synthesized by the:

1. Middle layer cells
2. Endothecium
3. Tapetal cells
4. Microspore mother cells

Q.

Explain the role of tapetum in the formation pollen-grain wall.

Q. Which of the following options describes tapetum correctly?

1. Nutritive tissue
2. Sporogenous tissue
3. Protective and haploid tissue
4. Outermost layer of microsporangium wall

Q. Which of the following is wrong about tapetum?

1. It nourishes developing microspores
2. It secretes callase enzyme for dissolving callose around pollen tetrad
3. It is multi-nucleated due to free nuclear division
4. None of the above

Q. Cyclosis is absent in which of the following..??

1. Diatoms
2. Eubacteria
3. Algae
4. Plantae.

Q. Cellular totipotency is shown by ____________.

1. Only bacterial cells
2. Gymnosperm cells
3. All eukaryotic cells
4. All plant cells

Q. Albuminous seeds store food materials in ___________.

Q. Very short answer type.
What is corona radiata?

Q. Which two factors primarily affect the development phase of growth of plants?

1. Light and temperature
2. Rainfall and temperature
3. Light and wind
4. Temperature and relative humidity

Q. A mature ligule, having a prominent basal portion, is called

1. Trichocyst
2. Heterocyst
3. Rhizophore
4. Glossopodium

Q. Which of the following options describes tapetum correctly?

1. Nutritive tissue
2. Sporogenous tissue
3. Protective and haploid tissue
4. Outermost layer of microsporangium wall

Q. Fertilization in which the male gametes are carried through agency of pollen tube is known as

1. Syngamy
2. Siphonogamy
3. Chalazogamy
4. Porogamy

Q. Study of pollen grains is?

1. Palaeontology
2. Palynology
3. None of the above
4. Palaeobotany

Q. can we consider sporogenous tissue as inner wall of young anther or it should be tapetum?

Q. In a stratified cambium, the fusiform initials are

1. Short and arranged in horizontal tiers
2. Short and overlap each other at the ends
3. Long and overlap each other at the ends
4. Short or long and overlap each other at the ends

Q. what is the difference between apomixis and parthenocarpy in fruits?

Q.

what is the advantage of retaining the bulk of the nutrient rich cytoplasm of primary oocyte by secondary oocyte?

Q. Egg with peripheral cytoplasm around the yolk is

1. Isolecithal
2. Microlecithal
3. Telolecithal
4. Centrolecithal

Q. The most common type of tapetum is?

1. Secretary or glandular type
2. Amoeboid or invasive type
3. Nonglandular and noninvasive type
4. Resupinate type

Q.

Which of the following is incorrect with respect to the tapetum?

1. It is the innermost layer of anther wall.

2. It nourishes the developing pollen grains

3. It surrounds the inner sporogenous tissue

4. It possess dense cytoplasm and generally have one nucleus

Q. Which one of the following statements is correct?

1. Sporogenous tissue is haploid.
2. In over 60 per cent of angiosperms, pollen grains are shed at the 3-celled stage.
3. Pollen grains of some species are stored in liquid ammonia.
4. Tapetum nourishes the developing pollen.

Q. Meckel's diverticulum is found in_________.

1. Ileum
2. Appendix
3. pylorus
4. Rectum

Q. The generative cell of a two-celled pollen divides in the pollen tube but not in a three-celled pollen. Give reasons.