Why are Angiosperms so successful? Question 2 options: They use motile sperm for

Question

Why are Angiosperms so successful?

Question 2 options:

They use motile sperm for reproduction which allows them to disperse gametes widely to promote genetic diversity

They use pollen to disperse male gametes and enlist the services of pollinators to carry pollen

They produce seeds which provide nutrition (in the triploid endosperm) for the growing embryo, and have seed dispersal mechanisms

2 and 3

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Question 3 (1 point)

Which of the following is NOT part of the pollination process of flowering plants?

Question 3 options:

The egg contained within the female gametophyte is fertilized by a sperm cell contained within the male gametophyte

The pollen grains germinate on the stigma and grow down the style to reach the egg contained within the female gametophyte (inside the ovule).

Pollinators pick up pollen grains from the flowers stamens and move them from flower to flower.

Pollen on the pollinators body is often deposited on the next flowers stigma

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Question 4 (1 point)

Gymnosperms evolved before Angiosperms

Question 4 options:

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They use motile sperm for reproduction which allows them to disperse gametes widely to promote genetic diversity

They use pollen to disperse male gametes and enlist the services of pollinators to carry pollen

They produce seeds which provide nutrition (in the triploid endosperm) for the growing embryo, and have seed dispersal mechanisms

2 and 3

Explanation / Answer

QUESTION 2.

Why are Angiosperms so successful ?

ANSWER: 2 and 3

2.They use pollen to disperse male gametes and enlist the services of pollinators to carry pollen:-

            Pollination is the movement of male sex cell( male gamete) to female reproductive organs. Generally angiosperms use various modes of pollen dispersal.

E.g. (a). Pollination by insects- various insects helps in the dispersal of pollen grains and in return they got nector as a reward/food and in some species floral rewards are to provide safe place to lay eggs.

    (b).wind pollination

    (c). Pollination by birds etc.

3.They produce seeds which provide nutrition (in the triploid endosperm) for the growing embryo, and have seed dispersal mechanisms : seeds of angiosperms are enclosed within a ovary and endosperm provides nutrition.

These features of angiosperms made them highly evolved or successive than other plants of the planet.

QUESTION;3

(1)The egg contained within the female gametophyte is fertilized by a sperm cell contained within the male gametophyte. This is NOT part of the pollination process of flowering plants; this is the fegg fertilization process occurs in the female gametophyte.

Question 4:

Gymnosperms evolved before Angiosperms is True.

Gymnosperms and angiosperms are spermatophytes( 1. whose body is differentiated into roots ,stem and leaves. 2. Vascular bundles are well developed 3. These plants produce seeds.)

Gymnosperms are woody trees with cones like appearance. They bear no flower, no fruits and they are not covered by the fruit wall. E.g. Pinus, Cycas etc.

Angiosperms consists of herbs,shrubs and trees. The angiosperms are divided into Dicotyledons and Monocotyledons.

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