Sexual Reproduction in Flowering Plants Test

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Sexual Reproduction in Flowering Plants Test - 44

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Weekly Quiz Competition

Question 1
1 / -0

Masses of pollen grains i.e. pollinia is found in

A
Orchidaceae

B
Solanaceae

C
Malvaceae

D
Gramineae

Solution

Orchidoideae have a single terminal stamen and the anthers produce one or more waxy masses of pollen called as pollinia. The gynoecium consists of a single compound pistil of 3 carpels that together with the androecium comprises the column. The stigma is proximal to the single terminal stamen. The stigma is two or three lobed and the ovary is inferior and has 1 locule with numerous tiny parietal ovules. The fruit is mostly capsular.
So, the correct answer is 'Orchidaceae'
Question 2
1 / -0

The scutellum observed in a gram of wheat or maize is comparable to which part of the seed in other monocotyledons?

A
Plumule

B
Cotyledon

C
Endosperm

D
Aleurone layer
Question 3
1 / -0

After preparing a transverse section out of a cut piece of a
plant axis, it was seen that it has a C shaped open arch of
end arch collateral vascular bundles with secondary growth.
This indicates that it is a transverse section of _______________.

A
A dicotyledonous petiole

B
A dicot stem at the node

C
A dicot root at the point where a root branch is corning out

D
A phylloclade
Question 4
1 / -0

Inferior ovary occurs in _____________.

A
Cruciferae

B
Compositae

C
Malvaceae

D
Ranuculaceae

Solution

In family compositae carpels 2, connate , ovary inferior and basal placentation.
Question 5
1 / -0

A triglyceride molecule has

A
Three fatty acids with one glycerol molecule

B
Three fatty acids with two glycerol molecule

C
Two fatty acids with two glycerol molecules

D
One fatty acid with one glycerol molecule

Solution

Triglyceride consist of a glycerol molecule bound to three fatty acid molecules. Triglycerides are esters. These are main components of body fat.
Question 6
1 / -0

A clove represents a

A
Terminal bud

B
Accessory bud

C
Flower bud

D
Vegetative bud
Solution
- Cloves represent the flower bud. They are aromatic. They are flower buds of a tree Syzygium aromaticum belonging to the family Myrtaceae.
So the correct option is C.
Question 7
1 / -0

Grafting is not possible in monocots because they

A
Have scattered vascular bundles

B
Have parallel venation

C
Are herbaceous

D
Lack cambium

Solution

A new variety is produced by joining parts of two different plants (with the help of cambia) is called grafting. In monocots, cambium is absent hence the parts of two different plants are unable to joint each other.So the correct option is D.
Question 8
1 / -0

The condition of stamens in Cruciferae family is correctly
expressed as

A
$$A_{6}$$

B
A_{2+4}

C
A_{4+2}

D
All of these

Solution

6 stamens, polyandrous , tetradynamous condition i.e., 4+2 or in two whorls . 4 inner long and 2 outer short .
Question 9
1 / -0

In a type of apomixis known as adventive embryony, embryos develop directly from the -

A
Synergids or antipodals in an embryo sac

B
Nucellus or integuments

C
Zygote

D
Accessory embryo sacs in the ovule

Solution

Apomixis does not involve gamete formation and fertilization as found in amphimixis. Adventive embryo formation is a type of apomixis in which embryos are formed from diploid integumental or nucellar cells.

So, the correct answer is 'Nucellus or integuments'
Question 10
1 / -0

In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Choose a suitable explanation for the above situation.

A
Stamens removed but pistil is intact.

B
Stamens removed but androecium is intact.

C
Stamens removed but sepal is intact.

D
None of the above.

Solution

When the stamen or the male part of the flower is removed, it will have no effect on flower-producing capability of the plant because the pistil or the female reproductive part is intact. So, by the process of cross fertilization, the stamen from other plant might fertilize the pistil of this flower, thereby producing a fruit.
Thus, the correct answer is option (A).

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Re-Attempt Weekly Quiz Competition

Sexual Reproduction in Flowering Plants Test - 44

Result

Sexual Reproduction in Flowering Plants Test - 44

Score

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SHARING IS CARING

Question 1

Orchidaceae

Solanaceae

Malvaceae

Gramineae

Solution

Question 2

Plumule

Cotyledon

Endosperm

Aleurone layer

Question 3

A dicotyledonous petiole

A dicot stem at the node

A dicot root at the point where a root branch is corning out

A phylloclade

Question 4

Cruciferae

Compositae

Malvaceae

Ranuculaceae

Solution

Question 5

Three fatty acids with one glycerol molecule

Three fatty acids with two glycerol molecule

Two fatty acids with two glycerol molecules

One fatty acid with one glycerol molecule

Solution

Question 6

Terminal bud

Accessory bud

Flower bud

Vegetative bud

Solution

Question 7

Have scattered vascular bundles

Have parallel venation

Are herbaceous

Lack cambium

Solution

Question 8

$$A_{6}$$

A_{2+4}

A_{4+2}

All of these

Solution

Question 9

Synergids or antipodals in an embryo sac

Nucellus or integuments

Zygote

Accessory embryo sacs in the ovule

Solution

Question 10

Stamens removed but pistil is intact.

Stamens removed but androecium is intact.

Stamens removed but sepal is intact.

None of the above.

Solution

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