Question

enlist the general character of angosperm with two example
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Answer 1

Answer:

Angiosperms are able to grow in a variety of habitats. They can grow as trees, shrubs, bushes, herbs, and small flowering plants. Some of the characteristics of angiosperms include:

All angiosperms have flowers at some stage in their life. The flowers serve as the reproductive organs for the plant, providing them a means of exchanging genetic information.

Angiosperms have small pollen grains that spread genetic information from flower to flower. These grains are much smaller than the gametophytes, or reproductive cells, used by non-flowering plants. This small size allows the process of fertilization to occur quicker in the flowers of angiosperms and makes them more efficient at reproducing.

All angiosperms have stamens. Stamens are the reproductive structures found in flowers that produce the pollen grains that carry the male genetic information.

Angiosperms have much smaller female reproductive parts than non-flowering plants, allowing them to produce seeds more quickly.

Angiosperms have carpels that enclose developing seeds that may turn into a fruit.

A great advantage for angiosperms is the production of endosperm. Endosperm is a material that forms after fertilization and serves as a highly nutritional food source for the developing seed and seedling.

Examples

Angiosperms come in a variety of forms. Some common examples of angiosperms include magnolia trees, roses, tulips, and tomatoes. Magnolia trees can be found towering all throughout the southern United States. These trees are prime examples of angiosperms. They are large trees growing up to 40 feet tall. Their large, impressive flowers are used to attract pollinators and as a means of reproduction.

Magnolia tree

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Additional Activities

Angiosperms Research Prompts

Research Prompt 1

Some angiosperms rely heavily on the fruits to disperse their seeds. Research the following angiosperms and how the plant disperses seeds: impatiens, witch hazel, and touch-me-nots. Compare the differences between the methods of seed dispersal between the plants. How are they different? How are they the same? Is one method more effective than the other methods?

Research Prompt 2

Angiosperms are pollinated by water, wind, insects and animals. Research how the following angiosperms are pollinated: oak tree, tomato plant, and tulips. Do any of these plants use more than one type of pollination?

Research Prompt 3

Angiosperms are flowering plants. There are three different life patterns of angiosperms: annuals, biennials, and perennials. Research the three life patterns of angiosperms. What are the differences between these angiosperm life patterns? What are some examples of each type of angiosperm?

Research Prompt 4

Angiosperms can be found in almost every terrestrial habitat. They can be found in the Arctic tundra, in deserts, wetlands, and even the cracks of urban sidewalks. Research more information about angiosperms and explain why they are the dominant form of plant life in most terrestrial ecosystems. What advantages do they have over gymnosperms that makes them more dominant?

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Answer 2

Answer:

$\huge \red{\sf{ Answer :}}$

$\bigstar \: \underline{\purple{\sf General \: characteristics \: of \: Angiosperms:}}$

(i.) Habitat: The Angiosperms are group of highly evolved plants, primarily adapted to terrestrial habitat.

(ii.) Alternation of generations: Angiosperms show heteromorphic alternation of generations in which the sporophyte is diploid dominant, autotrophic and independent, while the gametophytes are recessive, haploid and dependent on the sporophyte.

(iii) Body: The body of sporophyte is divisible into root, stem and leaves. It has flowers, fruits and seeds.

(iv.) Vascular tissues: Vascular tissues are well differentiated. Xylem shows vessels or tracheae, while phloem has sieve tubes and companion cells.

(v.) Spore: Heterospory is exhibited by all Angiosperms. Microspores (also called pollens) are formed in microsporangia. They develop on highly specialized microsporophylls or stamens, while megaspores are formed in megasporangia (or ovules) borne on highly specialized megasporophylls called carpels.

(vi.) Sporophylls: Besides the essential whorls of microsporophylls (Androecium) and megasporophylls (Gynoecium), there are accessory whorls of sepals (calyx) and petals (corolla), clustered together into flowers.

(vii.) Pollination: The pollination is indirect and maybe self or cross.

(viii.) Sexual reproduction:

There is typically double fertilization, one male gamete fusing with egg cell and another fusing with secondary nucleus.

The zygote continues to develop within the ovule until seed is developed. The ovary simultaneously ripens into a fruit.

e.g. Helianthus annus, Zea mays.