Reproduction in Bryophytes

Q. Contrivance for self-pollination is

1. Bisexuality
2. Homogamy
3. Cleistogamy
4. All of the above

Q.

Why are bryophytes called amphibians of the plant kingdom?

Q. In bryophytes and pteridophytes, transport of male gamete requires :

1. Wind
2. Insects
3. Birds
4. Water

Q. Why does vegetative phase precede flowering in a plant?

Q. Plant part which consists of two generations one within the other is?
Germinated seed, embryo, unfertilized ovule, Seed?

Q.

How do fertilization and zygote formation take place in pteridophytes?

Q. Equational division and reduction division are also known as X and Y, respectively. Identify X and Y.

1. X-mitosis, Y-meiosis
2. X-meiosis, Y-mitosis
3. X-meiosis, Y-binary fission
4. X-mitosis, Y-binary fission

Q.

Why are bryophytes homosporous?

Q. In a grafted plant, stock has $48$ chromosomes while scion has $24$ chromosomes. The chromosome number for root cells and eggs are

1. 
   $48\text{and}12$
2. 
   $24\text{and}24$
3. 
   $24\text{and}12$
4. 
   $48\text{and}24$

Q. Choose the incorrect statement from the following about the fertilisation in bryophytes:

1. Isogamous fertilisation happens in bryophytes
2. Antherozoid and egg are haploid
3. The embryo forms the sporophytes and is diploid
4. The sporophyte is dependent on the gametophyte and produces spores

Q. In which of the following plants, vegetative propagation occurs by adventitious buds on leaves?

1. Ginger
2. Byophyllum
3. Banyan
4. Mint

Q. In bryophytes and pteridophytes, transport of male gametes requires

1. Water
2. Birds
3. Wind
4. Insects

Q.

Which of the following regenerated with help of layering ?

1. Cactus

2. Rose

3. Mango

4. Jasmine

Q. The unique feature of bryophytes is that they

1. they produce spores
2. lack vascular tissues
3. lack roots
4. have sporophyte attached to the photosynthetic gametophyte

Q.

Are Pteridophytes amphibians?

Q.

Are antheridia multicellular?

Q. Endosperm is not completely consumed by developing embryo in

1. Castor
   
2. Bean
   

3. Pea
   

4. Gram
   

Q. In Phaeophyceae, vegetative reproduction takes place by

Q. Bryophytes cannot reproduce in the absence of water.

1. True
2. False

Q.

Distinguish between the following on the basis of what is given in the brackets.

$\left(i\right)$ Mitosis and meiosis $\left(\text{mode, occurrence and significance}\right).$

Q.

In bryophytes male and female sex organs are called ......... and ......... .

Q. Equational division and reduction division are also known as X and Y, respectively. Identify X and Y.

1. X-mitosis, Y-meiosis
2. X-meiosis, Y-mitosis
3. X-mitosis, Y-binary fission
4. X-meiosis, Y-binary fission

Q.

The unique features of bryophytes is that they produce _____

1. Sporophyte on the gametophyte

2. Protonema

3. Gametophyte

4. Both A and B

Q. Equational division and reduction division are also known as X and Y, respectively. Identify X and Y.

1. X-meiosis, Y-mitosis
2. X-meiosis, Y-binary fission
3. X-mitosis, Y-meiosis
4. X-mitosis, Y-binary fission

Q. Assertion :Angiosperms lack flagellate male gametes. Reason: Sperms are not dependent on water for fertilization.

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. Which of the following is not an adaptation of xerophytes?

1. Spongy tissue
2. Thick cuticle
3. Well developed mechanical tissue
4. Well developed vascular tissue

Q. Bryophytes are called the amphibians of the plant kingdom because

1. they can float on land and water
2. they live on land but use water for reproduction
3. they live in water but use soil for reproduction
4. they can survive on land and water like frogs

Q. The male and female sex organs of bryophytes are called.......... and..........respectively

Q. Vegetative reproduction is absent (except bulbils in few) in

1. Gymnosperms
2. Higher plants
3. None of the above
4. Angiosperms

Q. Choose the correct pair:

1. Mosses - isogamy
2. Liverworts - oogamy
3. Liverworts - budding
4. Mosses - gemmae