✍ Different Stages of Plant Life Cycle
- ➤ 1. Seed –. The plant life cycle starts with a seed. ...
- ➤ 2. Germination –. The next stage is germination. ...
- ➤ 3. Seedling –. The next step is seedling. ...
- ➤ 4. Adult Plant –. When a plant becomes mature, it started to grow flower (in a flowering plant) and flowers produce seeds.
- ➤ 5. Pollination –. ...
- ➤ 6. Seed Dispersal –
What plant has the longest life cycle?
Plant Life Cycles. The plant life cycle alternates between haploid and diploid generations. Embryonic development is seen only in the diploid generation. The embryo, however, is produced by the fusion of gametes, which are formed only by the haploid generation. So understanding the relationship between the two generations is important in the study of plant development.
How would you describe the plant life cycle?
What is the general life cycle of plants? The major stages of the flower life cycle are the seed, germination, growth, reproduction, pollination, and seed spreading stages. The plant life cycle starts with a seed; every seed holds a miniature plant called the embryo. There are two types of flowering plant seeds: dicots and monocots.
Which statement describes the life cycle of a plant?
The life cycle of plants consists of four phases; seed, sprout, small plant and mature plant. When the seed is planted in the soil with water and sunlight, it starts to grow into a small shoot. The sun helps the plant produce the food it needs when it grows into a small plant.
Do all plants have life cycles?
Plants alternate between the diploid sporophyte and haploid gametophyte, and between asexual and sexual reproduction. Because of this reason, the life cycle of plants is termed as an Alternation of Generations. The ability of the plants to reproduce sexually and asexually helps them to adapt to different environments.
Q1. What is the Alternation of Generations?
Ans - Alternation of generations can be defined as a type of life cycle in which a number of generations of plants differentiate between diploid an...
Q2. Mention the Steps Involved in the Alternation of Generations
Ans - The alternation of generations include the following stages:The diploid sporophyte has a structure called a sporangium.The sporangium undergo...
Q3. What Do You Mean by Sporophyte Generation?
Ans - Two haploid gametes fuse together to form a diploid zygote. This results in a sporophyte. The sporophyte is formed by multiple rounds of mito...
What is the life cycle of a plant?
The life cycle of a plant describes the different stages of the plant from the beginning of its life until the end, which is from seed to mature plant. However, not all plants produce seed.
What is the next step in a plant's growth cycle?
The next step is seedling. A very young plant that grow after germination. It starts growing towards the sunlight. Plants need sunlight, nutrients, water, and air to survive and grow. Photosynthesis helps the seedling grow into a mature plant.
What is it called when a plant does not produce flowers?
The plants which do not produce the flowers and seeds to reproduce are called Seedless Plants. Such as fern or mosses produce different kinds of cells called “ Spores ”. Spores are the part of the plants or their remaining. New plants are produced from the spores and continue to grow.
What are the parts of a flower?
There are different parts of a flower such as petals, sepals, stamen, pistil etc. Related Article – Parts of a Flower. ➤ 5. Pollination –. Pollination plays a very important role in the plant life cycle. Flowers use pollen to make seeds through a process called pollination.
When pollen moves from the stamen to the pistil, it is called: "Seeds start to grow
So, when pollen moved from the stamen to the pistil, called pollination. And Once pollination takes place, the seeds start to grow. ➤ 6. Seed Dispersal –. Finally, seeds get dispersed (scattered) away to new places and the plant life cycle starts again. Seeds can get spread by animals, wind, and water.
How is pollen transferred?
Pollen is transferred by different pollinators, such as birds, butterflies, insects, bees or even wind. When a butterfly or other insect lands on a flower, dust of pollen sticks to its legs. As the butterfly flies to the next plant, it transfers the pollen to the pistil. So, when pollen moved from the stamen to the pistil, called pollination.
What is the condition for a seed to germinate?
For germination, seeds need a suitable condition i.e. water, correct temperature and right location (such as in soil). When the proper conditions are met for the seed, it will begin to sprout. The first root begins to grow downward.
What is the life cycle of plants?
The life cycle of plants consists of four phases; seed, sprout, small plant and mature plant. When the seed is planted in the soil with water and sunlight, it starts to grow into a small shoot. The sun helps the plant produce the food it needs when it grows into a small plant.
What are the 5 stages of the plant life cycle?
There are 5 stages of the plant life cycle. The stages of seed, germination, growth, reproduction, pollination and seed propagation.
What are the 3 general life cycles of plants?
Depending on the life cycle, a plant is classified as annual, biennial or perennial. An annual, such as a Zinnia, completes its life cycle in 1 year.
What kind of life cycle do all plants have?
All plants have a characteristic life cycle that includes the alternation of generations. Plants alternate haploid and diploid generations. The alternation of generations makes both asexual and sexual reproduction possible. Starting from the diploid sporophyte, the spores are formed from meiosis.
What is the plant cycle called?
The life cycle of land plants is known as sporic (for sporic meiosis), dibionic or haplodiplontic life cycle. This type of life cycle presents an alternation of generations. In other words, to complete a complete circuit of its life cycle, a land plant must produce two different types of multicellular organisms.
What are the 6 stages of the plant life cycle?
Like humans and animals, the plant also goes through life stages before dying. There are a total of six stages: seed, plant, flower, fruit, then back to seed, then the plant dies.
What are the 2 phases of the plant life cycle?
Plants have two different stages in their life cycle: the gametophyte stage and the sporophyte stage. The haploid gametophyte produces the male and female gametes by mitosis in different multicellular structures. The fusion of male and female gametes forms the diploid zygote, which develops into a sporophyte.
Why is the life cycle of plants called an alternation of generations?
Because of this reason, the life cycle of plants is termed as an Alternation of Generations. The ability of the plants to reproduce sexually and asexually helps them to adapt to different environments. The alternation of generations depends upon the type of plant. The dominant generation is haploid and the gametophyte comprises ...
What are the stages of a flowering plant?
A flowering plant undergoes the following events during its life cycle: 1 Germination: A plant undergoes germination and begins to grow from seed. The roots are formed below the soil while the leaves, roots, and stem appear above the soil. 2 Pollination: Pollens are carried by wind or insects to another flower. This is called pollination. 3 Fertilization: The pollen travels to the ovary of the flower where the fusion of the male and gametes takes place. This is called fertilization. 4 Dispersal: The seeds are scattered by the wind and animals. Some of these seeds emerge into a new plant.
What is the next generation of sporangia?
These spores are released and carried away by air and water and when the conditions are favourable they develop into a gametophyte. Gametophyte Generation. This is the next generation in the alternation of generations.
What are the two stages of alternation of generations?
Following are the two stages of alternation of generations: Sporophyte Generation. When two haploid gametes fuse together they form a diploid zygote. This results in a sporophyte. The sporophyte is formed by multiple rounds of mitosis and is a multicellular organism.
How is a sporophyte formed?
The sporophyte is formed by multiple rounds of mitosis and is a multicellular organism. On reaching maturity, the sporophyte develops reproductive organs known as sporangia. This is one key point in the alternation of generations. These sporangia are used to create haploid spores.
What is the life cycle of diploid sporophytes?
Alternation of Generations – Life Cycle. The diploid sporophyte has a structure called a sporangium. The sporangium undergoes meiosis and forms haploid spores. The spore develops into a gametophyte which is haploid in nature. The gametophyte has the reproductive organs which undergo mitosis to form haploid gametes.
What is the meaning of ANS in plants?
Ans - Alternation of generations can be defined as a type of life cycle in which a number of generations of plants differentiate between diploid and haploid organisms. Alternation of generations is a common factor in plants, algae, and fungi. This can be compared to the sexual reproduction in animals where both haploid and diploid cells are found in every generation.
What is the life cycle of plants?
Therefore, the life cycle of plants is known as alternation of generations. The ability of the plants to reproduce sexually and asexually helps them to adapt to different environments. The alternation of generations depends upon the ...
How do plants begin their life cycle?
Some of these seeds emerge into a new plant. Thus we see how a plant life cycle begins with a seed. The seed sprouts to form a seedling. The seedling gets converted into a new plant which forms new seeds and the cycle continues. Also Read: Sexual Reproduction in Plants.
What is the structure of a diploid sporophyte?
The diploid sporophyte has a structure called sporangium. The sporangium undergoes meiosis and forms haploid spores. The spore develops into a gametophyte which is haploid in nature. The gametophyte has the reproductive organs which undergo mitosis to form haploid gametes.
What is the next generation of gametophytes?
Gametophyte Generation. This is the next generation in the alternation of generations. The spore is newly formed and has half the DNA as the parent organism. This spore undergoes mitosis multiple times to form a gametophyte. The gametophyte generation creates gametes. These gametes are produced by gametangia.
How is a sporophyte formed?
The sporophyte is formed by multiple rounds of mitosis and is a multicellular organism. On reaching maturity, the sporophyte develops reproductive organs known as sporangia. This is one key point in the alternation of generations. These sporangia are used to create haploid spores.
What is the alternation of generations?
What is Alternation of Generations? Alternation of generations is common in plants, algae, and fungi. This can be compared to the sexual reproduction in animals where both haploid and diploid cells are found in every generation. Plants alternate between the diploid sporophyte and haploid gametophyte, and between asexual and sexual reproduction.
Which generation is dominant in bryophytes?
In Bryophytes, the dominant generation is haploid and the gametophyte comprises the main plant. In tracheophytes, the dominant generation is diploid and the sporophyte comprises the main plant. The plants’ life cycle in one of the two generations is dominant over the other.
What is the life cycle of a plant parasite?
General Life Cycle. The life cycles of most plant-parasitic nematodes are similar and start with an egg [5, 6]. The egg undergoes embryonic development resulting in a first-stage (J1) juvenile nematode. Depending upon the nematode species, the J1 may hatch from the egg or molt within the egg, forming a second-stage juvenile (J2).
When do root-knot nematodes become stationary?
The root-knot nematode becomes stationary once it begins feeding inside the root system, where it completes its respective molts and forms the adult [9, 11, 13, 38]. When the adult stage is reached, the mature female begins laying eggs. Males are rarely produced and if formed, will leave the roots and no longer feed.
How many eggs can a nematode lay?
Depending on the species, each nematode female can lay dozens to hundreds of eggs in her life span. The life stage at which nematodes infect plants varies by nematode species. All juvenile stages, as well as the mature adult of the lesion and lance nematodes, are capable of infecting a crop’s root system. The lesion and lance nematodes are ...
What happens to a soybean cyst after mating?
The female remains sedentary in the root, but as it grows in size its posterior will push out of the root. After mating, the female will begin laying eggs.
How are giant cells created?
The giant cells are created by the feeding activity of the nematodes, and they act as a nutrient sink and feed the nematode throughout its life cycle. FIGURE 12.4. The infective stage of the reniform nematode, Rotylenchulus reniformis, the immature female, at 400x magnification.
Where do root-knot nematodes enter?
The root-knot nematode enters roots just behind the root cap while the reniform and soybean cyst nematodes enter at any point on the root system [5]. After entering the root, all three species migrate through the root system to the vascular tissue.
How long does it take for a nematode to hatch?
The complete life cycle from egg to egg requires three to six weeks depending on the nematode species, ...
What is the definition of a life cycle?
These stages are called a life cycle. A life cycle is defined as the developmental stages that occur during an organism's lifetime.
How long does it take for an organism to complete its life cycle?
The time it takes for an organism to complete its life cycle is called a life span. The life span of organisms ranges from weeks to thousands of years. To unlock this lesson you must be a Study.com Member. Create your account.
How do salmon live?
Salmon have a complex life cycle comprised of 6 main stages. Salmon begin their life in a stream as a fertilized egg. Once the eggs hatch, they are infant salmon called alevin. Upon leaving their nest, they become juvenile fish called fry. As they grow larger, fry start to swim toward the ocean and become smolt.
What are the stages of life?
In general, the life cycles of plants and animals have three basic stages including a fertilized egg or seed, immature juvenile, and adult.
How long does it take for salmon to die?
Shortly after they mate, salmon die. The time it takes for salmon to complete their life cycle ranges from 3 to 7 years. Human Life Cycle. The human life cycle is complex and is comprised of five main stages. The life cycle starts as a fertilized egg. Then after 40 weeks in utero an infant is born.
What are the stages of a flowering plant?
Flowering plants have a simple life cycle comprised of three main stages, a seed, seedling, and a mature plant. A germinated seed sprouts into an immature seedling. Over time, the seedling will develop into a mature, reproducing adult where it will produce flowers and seeds.
When does the life cycle end?
A life cycle ends when an organism dies. In general, plants and animals go through three basic stages in their life cycles, starting as a fertilized egg or seed, developing into an immature juvenile, and then finally transforming into an adult. During the adult stage, an organism will reproduce, giving rise to the next generation.
Spore to Gametophyte
A hornwort start as a haploid spore, which just means a spore that contains one set of chromosomes. Sometimes you will see a haploid represented by an n. You can contrast that with diploid organisms that contain two sets of chromosomes (one from each parent).
Sex Organs and Fertilization
The female sex organs of the hornwort are called archegonia (plural) and the male sex organs are called antheridia (also plural). The archegonia have eggs and the antheridia have sperm (which, fun fact, has two tails). If you've studied plants before, the term 'anther' may sound familiar.
Sporophyte
The zygote eventually becomes the sporophyte, which is the part of the plant that will produce haploid spores.
