What is it called when seeds are spread?

What is it called when seeds are spread?

Seed dispersal is the movement, spread or transport of seeds away from the parent plant. Dispersal involves the letting go or detachment of a diaspore from the main parent plant.

Which seeds are spread?

There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus.

What do you mean by seed dispersal?

Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources. Seeds are dispersed in several different ways. In some plants seeds are housed within a fruit (such as apples or oranges). Some fruits can be carried by water, such as a floating coconut.

Which seed is dispersed by seed?

Seed Dispersal by Gravity In some cases, the fallen fruit is carried by other agents like water, wind, birds or animal and helps in the dispersion of seeds. Apples, Commelina, canna, coconuts, calabash, passion fruit are a few examples of plants whose seeds are dispersed by Gravity – A force of attraction.

What conditions do seeds need to germinate?


  • The beginning of the growth of a seed into a seedling is known as germination.
  • All seeds need water, oxygen and the right temperature to germinate.
  • Dormancy is a state of suspended animation in which seeds delay germination until conditions are right for survival and growth.

What are the 3 basic parts of a seed?

“There are three parts of a seed.” “A bean or seed consists of a seed coat, an embryo, and a cotyledon.”

How seeds can spread?

Seed dispersal Plants disperse their seeds in lots of different ways. Some seeds are transported by the wind and are shaped to float, glide or spin through the air. Some seed pods are designed to explode and throw the seeds a good distance from the parent plant. Many plants also use animals to carry their seeds.

Can you just throw down grass seed?

If you simply toss the grass seed onto the soil, you will end up with poor germination. If the seeds are not properly protected by existing grass or a thin layer of topsoil, they may dry before germination or be washed away by rain.

Why do seeds sown very deep in soil fail to germinate?

Seeds planted deep in the soil do not germinate because they are unable to get enough oxygen. – When the seedling develops, it breaks out of the soil. After this stage, germination is complete, and the seedling can begin photosynthesis to gain energy.

What are some plants that spread their seeds?

Some common plants that use this type of seed dispersal are wisteria and mesquite. The jewel weed (also known as touch-me-not) shown here, has a seed pod that opens violently, spreading seeds in all directions.

Which is an example of the dispersal of seeds?

The seeds are usually ejected by an elastic contraction of fruit tissue. This shoots the seeds sort of like the pellets from a shotgun. Just like all the other methods of seed dispersal, some plants are better at ballistic dispersal than others. Some common examples of this type of plants are garden peas.

Why do plants spread their seeds in a circle?

Because this method of seed dispersal works so well, many of the plants that have this type of seeds are considered to be weeds. These seeds have a special wing-like adaptation that causes the seeds to spin in a circle as they fall, like the blades of a helicopter.

How are seeds carried away from parent plant?

Many plants have seeds that use water as a means of dispersal. The seeds float away from the parent plant. Mangrove trees live in estuaries. If a mangrove seed falls during low tide, it can begin to root in the soil. If the seeds fall in the water, they are carried away by the tide to grow somewhere else.