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2 votes
1 answer
59 views

How do roots of a seedling know the direction to grow?

When a seedling starts to grow covered by soil, I thought directions are clear: Roots grow following gravity (down to the water), and the cotyledons (right word?) grow against gravity, so that they'...
U. Windl's user avatar
  • 129
0 votes
0 answers
40 views

Why are sunflower seeds so much smaller than their shells?

I was snacking on some sunflower seeds recently when I noticed the large disparity between the size of the seed itself and the woody shell surrounding it. Why is this gap present? Is there some ...
Robert Goddard-Wright's user avatar
0 votes
0 answers
57 views

What could those shiny spots on the walnut kernels be?

I bought the shelled walnuts — many were mouldy — but those small round reflective spots don't look like mould (ascomycetes). It reminds more of E.coli colonies. I couldn't find anything on the net ...
Damocle Damoclev's user avatar
0 votes
0 answers
38 views

How can I determine statistical significance in seed length and width measurements?

I am researching seed size variation in cereals. I used ImageJ to measure the seeds and generated arbitrary values. Later I converted the measurements to micrometers. I took length and width ...
Eric Whisnant's user avatar
0 votes
1 answer
67 views

White oak germination in autumn — Leaves or just roots?

I collected fallen acorns from a white oak tree in Toronto, Ontario, in mid-September 2023. The acorns were germinating at the time, so I planted them (in a cage to protect them from rodents). So far, ...
User1974's user avatar
  • 958
0 votes
1 answer
72 views

Can you identify this seedpod (Malvaceae)?

I collected this seedpod from a plant I was pretty sure belongs to the mallow family (Malvaceae). Location = Central Europe. Unfortunately I lost my picture of the whole plant. Can you help me to ...
chlaus's user avatar
  • 23
0 votes
0 answers
67 views

Seeds of fruits

Some fruits ( like watermelon , pomegranate, etc ) have their seeds spread out throughout their bulk . Also , there are fruits which have seeds at their centre of symmetry ( like apples ) . Is there ...
Get_ Maths's user avatar
1 vote
2 answers
162 views

Seed head Identification. July in Toronto, Ontario, Canada

What flower has this type of seed head? (this was shot on July 17th, 2020) This was in a residential garden in Toronto. Going from memory, i believe the size was approx. 2 1/2" to 3" in ...
OrbitRob's user avatar
  • 647
0 votes
2 answers
268 views

Do plants originate from a single cell

I read the generalization that life originates from a cell, and from my understanding animals, they originate from a single cell, produced as a result of sexual reproduction. And then life begins to ...
PIngu's user avatar
  • 45
2 votes
1 answer
423 views

Identification of tree seed pods observed in Western Australia near the city of Perth in February

These where observed during a holiday in Western Australia near the city of Perth in February 2019. I assume they are tree seed pods. But from which tree?
nevrome's user avatar
  • 197
3 votes
1 answer
151 views

Can anyone identify this seed, pit, or nut?

I found this on the recessed top of the intake manifold of my car engine. It may have been there for weeks. It was likely brought there by a rat or squirrel who was unable to chew through the outer ...
OCPatch's user avatar
  • 131
2 votes
2 answers
172 views

What was the evolutionary advantage of having seeds so large that they could only be dispersed by megafauna?

I understand that fruits like the avocado and the osange orange are so large and unwieldy that their evolutionary "intent" was to be consumed whole by megafauna that are now extinct. What I ...
jwezorek's user avatar
  • 123
2 votes
1 answer
525 views

Do de-husked seeds germinate?

As simple as that, lentils beans and other legumes are sold both with and without husk, and often I make beans with the husk germinate in a jar. Do those without husk germinate as well? Or are they ...
Enlico's user avatar
  • 161
-2 votes
1 answer
41 views

Where can I find information on the anatomy or biology of seeds?

Where can I find information on the anatomy or biology of seeds? For example if I want to know the anatomy (some sort of drawing) of a green bean where can I go to find such information? Searching ...
wwjdm's user avatar
  • 99
13 votes
6 answers
3k views

Why do seeds grow upwards?

Why do seeds grow upwards? Surely gravity would pull them towards the earth's core? Can anyone shine any light on this? Do seeds that are planted deeper grow more quickly.
user avatar
2 votes
0 answers
27 views

Why does the iron content differ in different species on seeds?

Iron can be affected by pH of the soil but why does each species actually have a different iron content. What causes it? What genes cause it?
lara's user avatar
  • 21
1 vote
1 answer
179 views

How does one identify a seed's species & variety?

How does one identify a seed's species & variety, could it be done by some means of DNA or by use of a microscope? Say for example, I had a pumpkin seed, I knew that it was a "small sugar pumpkin"...
Kyukiou's user avatar
  • 11
5 votes
1 answer
318 views

What are these little leaves growing on these other leaves? (plant growing near the ocean)

I saw many of these plants while hiking on a hill facing the ocean in northern Taiwan. I've included a snapshot of a nearby part of the same trail to show it's rugged, wet, green, and rocky, and ...
uhoh's user avatar
  • 5,598
2 votes
1 answer
42 views

Cattail seeds spring revitalization

There's a genus of plants known as Typha, or cattail. They have seeds like of dandelion, that form thick heads. Such a head may be cut off from the plant and be used for, say, decorative purpose, but ...
Usurer's user avatar
  • 171
0 votes
1 answer
159 views

Would salt cause a pistachio nut not to be able to germinate?

If I buy a bag of pistachio nuts that have been hand picked off the tree when ripe, then salted in a (light) saltwater solution, then vacuum-sealed, and stored in a refrigerator, then will they ...
brutal_machinery's user avatar
2 votes
1 answer
273 views

Is the flesh of a fruit selected for the benefit of the sprouting seed or to attract the frugivorous seed disperser animal?

In a question about the low protein content in fruits, one answer suggests the energy, carbohydrate, and protein content in a fruit evolved to entice animal seed dispersers, not foster the sprouting ...
ziggurism's user avatar
  • 129
2 votes
4 answers
216 views

Are spores seeds?

It seems to me that the spores produced by bread mould are actually its seeds but my textbook says that they are not. My rationale is that spores are seeds of bread mould because both spores and seeds ...
CandidFlakes's user avatar
0 votes
1 answer
58 views

Inexpensive way to determine mass of tiny seeds?

My niece is doing a science project and she wants to weigh various seeds, determine their volume and density. She tried using my kitchen scale, but it is not sensitive enough. I've suggested ...
futurebird's user avatar
2 votes
1 answer
1k views

Which method of seed dispersal is the most common among the seed plants?

The five most common methods of seed dispersal in the plant kingdom are: wind (anemochory): tumbleweeds, dandelions, maples animals:(epizoochory) externally - burs / (endozoochory) internally - ...
wanderweeer's user avatar
  • 2,743
5 votes
1 answer
1k views

Plant growing inside a fruit

Today after cutting open a papaya , a plant was found in it: How is it possible for a plant to grow in a fruit? How does it gets $CO_2$ and light for photosynthesis?
JM97's user avatar
  • 4,836
1 vote
0 answers
48 views

What impact do genetic engineering techniques have on seed breeders?

In research of seed breeding, I'm trying to understand the impact of genetic engineering techniques like CRISPR (This is the main one as I understand) on traditional seed breeders. Through searching ...
Fedor Stüpfendarf's user avatar
1 vote
0 answers
15 views

Do most plants need long photperiods in order to germinate.

For a plant to perform photosynthesis, it needs long photoperiods, right? But what about for germination, do MOST seeds need long photoperiods for germination? Thanks
Christopher U's user avatar
6 votes
1 answer
2k views

How does coconut form?

I've seen that at the earlier stage coconut is filed with water and, as time passes, the water inside the coconut escapes and a thick layer of white substance forms. Is the water converted into that ...
Mental Shakya's user avatar
8 votes
2 answers
161 views

What is this fruit / nut?

These were found in a park in Pittsburgh, PA. From a distance they looked almost like plums, but they're actually hollow, paper-like covers that contain a hard pea-sized seed.
Dmitry Brant's user avatar
2 votes
2 answers
78 views

Self-fertile PRUNUS: Approximately how much of the genome gets rearranged by meiosis?

I'll admit that I don't have a background in science, so this might be a stupid question. Suggestions and edits are welcome. The question is related to a similar question I had here: What DNA does a ...
HeyBud's user avatar
  • 47
2 votes
1 answer
2k views

What DNA does a self-fertile plant's seedling have?

Some plants are said to be self-fertile. An example is Prunus tomentosa. Assuming that no cross-pollination happened with ...
HeyBud's user avatar
  • 47
0 votes
1 answer
434 views

Do seeds use cellular respiration when they are germinating?

Do seeds use cellular respiration when they are germinating?
Timothy's user avatar
1 vote
0 answers
575 views

Could a 3D Printed Plant Seed be Possible with Existing Technology?

The first genetically cloned animal was Dolly the sheep. As I understand it, this was possible because all that was needed was an embryo containing the cloned genetic material and a womb for that ...
Kenneth Moore's user avatar
1 vote
1 answer
271 views

Are there any fruits that rely on dispersal of their seeds using excrement?

Are there any fruits that have seeds which can survive the digestive entirety of an animal's digestive system and remain germinable once passed on in animal excrement? Perhaps this is the primary ...
RackAttack's user avatar
1 vote
0 answers
257 views

Anatomy of seeds (dicot and monocot)

Do all dicot seeds have endosperm? Will they be retain as they grow and what are the difference with its monocot counterpart?
Vincent Vhan Goh's user avatar
6 votes
1 answer
89 views

How should lentil roots grow in a microgravity system?

I recently executed an experiment in which I collocated 20 lentil seeds in independent Petri boxes with an agar agar solution, all of it located in a clinostat (a slowly rotating device used to ...
Alejandro Del Valle Alvarado's user avatar
0 votes
1 answer
629 views

What is an example of a plant species that is a halophyte with seeds that germinate quickly?

I’m doing an experiment on the effect of salt concentration on the germination of seeds from halophyte plants. What would be an example of a species that is suitable for such an experiment? I would ...
L. Johnson's user avatar
3 votes
1 answer
74 views

Are there seeds intended to feed eaters?

Seeds are meant to survive digestive systems of the animals that disperse them. Are there seeds meant for a creature, who will digest most of the seeds for nutrition and disperse only a minority of ...
Jesvin Jose's user avatar
6 votes
1 answer
1k views

Could potatoes that have been refrigerated for 142 days still sprout?

I know that potatoes can still sprout even after being refrigerated, but could you refrigerate them for 142 days still use them as seeds to grow more plants after that? As for the temperature of the ...
Fiksdal's user avatar
  • 169
5 votes
3 answers
306 views

Wax layer destruction from seed coats

I'm working with some orchid species, and i encounter a specific issue. Some of those species deposits upon their seed coat a wax layer. This layer makes seeds behave in a very hydrophobic way. You ...
F.N's user avatar
  • 409
3 votes
1 answer
155 views

Determine which seed will germinate first

I recently studied about plant physiology for a test. Strangely, there was this question which I had no idea how to approach. The question is, Which seed will germinate first? a) Castor b) Wheat c)...
Mrinal Gautam's user avatar
1 vote
0 answers
49 views

Yew seed dormancy reduction

Yew seeds have very long dormancy when artificially planted. They are also adapted to passage through digestive systems of animals that eat/transport them. But could the dormancy be shorter (or the ...
user2373145's user avatar
6 votes
1 answer
786 views

What sort of seed pod is this?

My son found this floating in a stream in Massachusetts, in the northeastern US. It was intact when he found it, but he cracked it open to see what was inside. I did some Google image searching, but ...
MattDMo's user avatar
  • 15.3k
1 vote
0 answers
914 views

Why is it easy to separate the cotton wool from the roots of young plants grown in cotton?

In my book it is said that if we grow Maize and Gram seeds in wet cotton, after the seeds are sprouted it is easy to separate the cotton wool from the roots of young plants. My question is why is it ...
user31782's user avatar
  • 613
21 votes
1 answer
23k views

Why do plants fruit?

This is a two-part question: What is the point of fruit if not to be eaten? It’s my understanding that organisms will adapt to survive and thrive. I understand that being eaten can spread seeds, but ...
Srb1313711's user avatar
3 votes
1 answer
156 views

Confusion regarding seedless grape and the normal process of germination

In general, does seedless grape by definition contains seed or is the seed small enough that the process of ingestion creates the illusion that there is no seed? If the latter is true, is the ...
user3685689's user avatar
1 vote
0 answers
116 views

Why do some fruits have their seeds disintegrated

Sometimes I'd come across a Lychee or a Naseberry whose seeds are kinda disintegrated.. in a thick powdered form, either completely or partially. What could cause such a thing? And is the fruit with ...
laggingreflex's user avatar
2 votes
1 answer
541 views

How are oranges in the US or anywhere made seedless?

How are oranges in the US or anywhere made seedless? Please explain the broad principles and not the technicalities.
Pranay Aryal's user avatar
5 votes
1 answer
15k views

What happens when seeds are refrigerated before planting?

My son is doing a science research project at school, and he's chosen to research what happens when seeds are refrigerated before planting. I cannot provide any information in regards to background ...
Zerium's user avatar
  • 585
5 votes
2 answers
2k views

If DNA has a half life of about 500 years, how can old seeds be planted?

According to this article, DNA has a half life of 512 years Wikipedia claims that there are seeds planted as old as 31000 years Doing the basic math $100 / (2^{30000/512})$ we get that only about $...
Andrey's user avatar
  • 286