Spore Formation

Q. What are zoospores?

Q. Which among the following is non-flagellated?

1. Zoospores of brown algae
2. Asexual spores of red algae
3. All of these are biflagellate
4. Asexual spores of green algae

Q. Zoospores are formed due to

1. meiosis
2. mitosis
3. fragmentation
4. budding

Q. Plants reproducing by spores such as mosses and ferns are grouped under the general term:

1. Thallophytes
2. Cryptogams
3. Bryophytes
4. Sporophytes

Q. What is apomixis and what is its importance?

Q. Which of the following class of fungi is being described by the given statements ?
(i) They are found in aquatic habitats and on decaying wood in moist and damp places.
(ii) Mycelium is aseptate and coenocytic.
(iii) Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile).
(iv) Some common examples are Mucor, Rhizopus and Albugo.

1. Deuteromycetes
2. Phycomycetes
3. Basidiomycetes
4. Ascomycetes

Q.

Conidia is an asexual spore . Correct or not ?

Q. The number of taxa exhibiting asexual reproduction is drastically reduced in higher plants (angiosperms) and higher animals (vertebrates) as compared with lower groups of plants and animals. Analyse the possible reasons for this situation.

Q.

In Rhizopus fungus, the fine thread-like structures spread on the whole surface of slice of bread are called:

Q. What is reproduction? Explain two advantages of sexual reproduction over asexual reproduction.

Q. Although sexual reproduction is a long drawn, energy-intensive complex form of reproduction, many groups of organisms in Kingdom Animalia and Plantae prefer this mode of reproduction. Give at least three reasons for this.

Q.

What is the meaning of Ascomycetes?

Q. A person has to perform crosses for the purpose of studying inheritance of a few traits/ characters. What should be the criteria for selecting the organisms?

Q. Zoospores are formed due to

1. meiosis
2. mitosis
3. fragmentation
4. budding

Q. Zoospores are formed due to

1. budding
2. fragmentation
3. meiosis
4. mitosis

Q. Match the following from column 1 and column 2:

	Column 1		Column 2
p	Penicillium	1	Zoospores
q	Hydra	2	Gemmules
r	Chlamydomonas	3	Buds
s	Sponge	4	Conidia

1. p - 2, q - 3, r - 1, s - 4
2. p - 1, q - 4, r - 3, s - 2
3. p - 2, q - 1, r - 4, s - 3
4. p - 4, q - 3, r - 1, s - 2

Q. Give two examples in which asexual reproduction occurs by spore formation.​

Q. Fungi are filamentous with the exception of $“X”$ which is unicellular. Identify $X$.

1. Mucor
2. Albugo
3. Lichen
4. Yeast

Q. In ferns, spores are produced in

1. Sori
2. Roots
3. Stem
4. Sporangiophore

Q. Agamospermy produces new plant through the formation of

1. Bulbil
2. Asexual embryo
3. Gemma
4. Parthenocarpy

Q. Which is common asexual reproductive structure in sponges?

1. Conidia
2. Buds
3. Gemmules
4. Zoospores

Q. Spore travels long distance to get favorable condition by

1. Humans
2. Animals
3. Water
4. Air

Q. Protein which plays a significant role in ageing is

1. Actin
2. Myosin
3. Collagen
4. Elastin

Q. Ulothrix is:

1. Nonmotile colonial alga lacking reproductive stages
2. Filmaentous alga with nonflagellated reproductive stages
3. Membranous alga producing zoospores
4. Filmaentous alga with flagellated reproductive stages

Q. The Ulothrix is considered morphologically more advanced than Spirogyra because

1. In Ulothrix zoospores are formed.
2. In Ulothrix motile gametes are formed.
3. In Ulothrix, the filament has holdfast.
4. None of the above.

Q.

When a moist slice of bread was kept aside for a few days then some organism grew on it to form a white cottony mass which later turned black. When this slice of bread was observed through a magnifying glass, then fine thread-like projections and thin stems having bulb-like structures at the top were seen.

(g) Name two non-flowering plants which reproduce by this method.

Q. Rhizopus belongs to

1. Zygomycetes
2. Ascomycetes
3. Basidiomycetes
4. Deuteromycetes

Q. In which of the following bryophytes, fragmentation of older thallus, the means of vegetative reproduction?

1. Riccia
2. Marchantia
3. Anthoceros
   
4. Both B and C

Q. In Mucor, zygospore develops from :

1. Promycelium
2. Progametangium
3. Gametangia
4. Mycelium

Q.

Are zoospores result of asexual reproduction?