Plant Kingdom : Gymnosperms and Angiosperms | Diversity in Living Organisms | Assessment | English | Grade 9

Which of the following group of plants is called naked seeded plants?

• Pteridophyta

• Bryophyta

• Gymnosperms

• Angiosperms

Answer explanation

The seeds of gymnosperms are not covered by the wall of the ovary, that's why their seeds are naked. Hence gymnosperms are also called naked seeded plants. Pteridophyta and bryophyta do not have seeds. Angiosperms have seeds that are enclosed within an ovary i.e. seeds are not naked.

What is the main feature of angiosperms?

• Presence of seeds

• Presence of flowers

• Presence of male and female gametes

• Presence of vascular tissues

Answer explanation

The main feature of angiosperms is the presence of flowers. The seeds of these plants develop in the ovaries of flowers which develops into the fruit. Hence these plants are also called the flowering plants.

Which of the following does not fit in the group?

• Wheat

• Maize

• Tomato

• Cycas

Answer explanation

Wheat, Maize, Tomato are all flowering plants i.e. Angiosperms but cycas is Gymnosperm. Hence, it does not fit in the group.

Tags

NGSS.MS-LS4-2

Which group of the plant kingdom is phanerogam without the ovaries?

• Angiosperms

• Pteridophytes

• Gymnosperms

• All of these

Answer explanation

The plants in which the reproductive organs are fully developed and differentiated and produce seeds through sexual reproduction, are called phanerogams. Pteridophytes lack the ability to produce seeds, so they are called cryptogams. While angiosperms and gymnosperms produce seeds. Hence these are phanerogams. Angiosperms are flowering plants. Flower has the ovary. Whereas gymnosperms are non-flowering plants. Hence ovary is not present in gymnosperms. Hence the gymnosperms are phanerogam without the ovaries.

Which of the following statement is correct?

• After the fertilization the zygote of angiosperms develop into the seed.

• After the fertilization the zygote of angiosperms develop into the fruit.

• After the fertilization the zygote of angiosperms develop into the endosperm.

• After the fertilization the zygote of angiosperms develop into the flower.

Answer explanation

In angiosperms two male gametes are released from the pollen grain. One male gamete fuses with the egg cell to form zygote and other male gamete fuses with the bipolar nuclei to form endosperm. After that the zygote develops into the seed and the ovary develops into the fruit. Hence after fertilization the zygote of angiosperms develop into the seed.

Match the columns.

• A - i B - ii C - iv D - iii

• A - iii B - i C - ii D - iv

• A - iv B - iii C - i D - ii

• A - iv B - ii C - iii D - i

Answer explanation

Mango is an Angiosperm. Deodar is a gymnosperm. Funaria is a bryophyte. Fern is a pteridophyte.

Which of the following is true with respect to onion plant? Statement I: It is angiosperm. Statement II: It is monocotyledonous.

• Statement I only

• Statement II only

• Statement I and II both

• Neither statement I nor statement II

Answer explanation

An onion plant is an angiosperm and has single cotyledon in its seed so it is also monocotyledonous.