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.
Which plants seeds are dispersed by explosion?
Answer :
Pea and Beans
Pea and bean
are two plants whose seeds are dispersed by explosion of their fruits.
What plants shoot their seeds?
Violets, poisonous squirting cucumbers, and touch-me-nots or Impatiens capensis
(not to be confused with these touch-me-nots) have an effective way of dispersing their seeds: They burst! The forceful ejection sends the seeds flying as far away as possible from the original plant.
What 3 things does a seed required for germination?
We know that seeds need optimal amounts of
water, oxygen, temperature, and light
to germinate.
How do you spread seeds?
Spread the seed evenly by hand in small areas. Use a hand or lawn spreader or a mechanical seeder in large areas.
Apply approximately 16 seeds per square inch
. Too many seeds too close together causes seedlings to fight for room and nutrients.
Which seed is dispersed by water?
Seed Dispersal by Water
Coconut, palm, mangroves, water lily, water mint
, are a few examples of plants whose seed are dispersed by the water.
Can seeds explode?
Exploding seed pods are a dramatic example of the many and varied strategies that plants use to disperse their seeds. The energy to power these explosions was thought to be generated through the seed pods deforming as they dried out. … So rapid movements, like exploding seed pods, are
rare
in the plant kingdom.
Which seeds are dispersed by animals?
Examples include
mangoes, guavas, breadfruit, carob
, and several fig species. In South Africa, a desert melon (Cucumis humifructus) participates in a symbiotic relationship with aardvarks—the animals eat the fruit for its water content and bury their own dung, which contains the seeds, near their burrows.
Can you germinate seeds in just water?
Why would seeds not germinate in
water
alone? Plain water usually doesn't have enough of the nutrients needed for seeds to germinate. Also, there is nothing in the water for the roots to grasp onto as they develop.
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.
How many hours of light do seeds need to germinate?
The most important thing to consider and deliver is adequate plant light. Seedlings need more light than full grown plants, ideally as much as
16-18 hours a day
. Additional light may be required for seeds started during the winter months.
What month is best to put grass seed down?
Generally speaking, you can plant grass seed any time of the year, but
fall
is the best time to seed a lawn with a cool season turfgrass variety. Spring is the best time to plant warm season turfgrass seed.
Can you just throw down grass seed?
Let us start with the simple question, will the seed grow if it is just thrown on the ground? The simple answer is,
yes
. Beyond just throwing the seed out into the lawn and not performing any grass maintenance there is a whole world of lawn care. While the seed is one of the most resilient out there.
How long does it take for grass to grow from seed?
Whether you're repairing bare spots, overseeding an existing lawn or starting from scratch, you can generally expect grass seedlings to emerge within
seven to 21 days
when grown under proper conditions. It may take another three to four weeks of growth before grass is long enough to mow.
Which fruits are dispersed by water?
Seeds dispersed by water are contained in light and buoyant fruit, giving them the ability to float.
Coconuts
are well known for their ability to float on water to reach land where they can germinate. Similarly, willow and silver birches produce lightweight fruit that can float on water.
How is an apple seed dispersed by water?
Answer:In some plants seeds are housed within a fruit (such as apples or oranges). These fruits, including the seeds, are eaten by animals who then disperse the seeds when they
defecate
. Some fruits can be carried by water, such as a floating coconut.
