Balbharati solutions for Biology [English] 12 Standard HSC Maharashtra State Board chapter 1 - Reproduction in Lower and Higher Plants [Latest edition]

Multiple choice question.

Insect pollinated flowers usually posses ______

Multiple choice question.

In ovule, meiosis occurs in ______

Multiple choice question.

The ploidy level is not the same in ______.

Which of the following types require pollinator but the result is genetically similar to autogamy?

If diploid chromosome number in a flowering plant is 12, then which one of the following will have 6 chromosomes?

Multiple choice question.

In angiosperms, endosperm is formed by/ due to ______

Multiple choice question.

Point out the odd one.

Very short answer type question:

Name the part of gynoecium that determines the compatible nature of pollen grain.

Very short answer type question:

How many haploid cells are present in a mature embryo sac?

Even though each pollen grain has 2 male gametes, why at least 20 pollen grains are required to fertilize 20 ovules in a particular carpel?

Very short answer type question:

Define megasporogenesis.

Very short answer type question:

What is hydrophily?

Name the layer which supplies nourishment to the developing pollen grains.

Very short answer type question:

Define Parthenocarpy.

Very short answer type question:

Are pollination and fertilization necessary in apomixis?

Very short answer type question:

Name the parts of pistil which develop into fruits and seeds.

What is the function of filiform apparatus?

How polyembryony can be commercially exploited?

Pollination and seeds formation is very crucial for fruit formation. Justify the statement.

Incompatibility is a natural barrier in the fusion of gametes. How will you explain this statement?

Describe three devices by which cross-pollination is encouraged in angiosperms by avoiding self- pollination.

Describe the process of double fertilization.

Explain the stages involved in the maturation of microspore into a male gametophyte.

Explain the development of dicot embryo.

Long Answer Question:

Draw a labeled diagram of the L.S. of anatropous ovule and list the components of the embryo sac and mention their fate after fertilization.

Fill in the blank:

The _________ collect the pollen grains.

Fill in the blanks:

The male whorl, called the ________ produces ________.

Fill in the blank:

The pollen grains represent the ________.

Fill in the blank:

The ________contains the egg or ovum.

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________takes place when one male gamete and the egg fuse together. The fertilized egg grows into a seed from which the new plants can grow.

Fill in the blank:

The ______ is the base of the flower to which other floral parts are attached.

Fill in the blank:

________is the transfer of pollen grains from the anther of the flower to the stigma of the same or a different flower

Once the pollen reaches the stigma, the pollen tube traverses down the ________ to the ovary where fertilization occurs.

Fill in the blanks:

The ______ are coloured to attract the insects that carry the pollen. Some flowers also produce ______ or ______ that attracts insects.

Fill in the blank:

The whorl ________is green that protects the flower until it opens.

Label the parts of seed.

Match the column.