The study of plant life; e.g. angiosperms, gymnosperms, bryophytes, pteridophytes, and algae.

learn more… | top users | synonyms (1)

4
votes
0answers
24 views

Gender and age-specific mutation rate in plants

Background General According to Cochran and Harpending (2013), mothers transmit on average a number $x$ of new mutations to their offspring. This number $x$ is independent of the age of the Mother. ...
2
votes
0answers
13 views

Does a presence of ants on a plant mean that the plant has been infested by aphids?

Ants protect aphids from their predators (such as ladybirds): Aphids and other hemipteran insects secrete a sweet liquid called honeydew, when they feed on plant sap. The sugars in honeydew are a ...
2
votes
0answers
12 views

Why are watermelons sweeter in the center?

Today I had a slice of watermelon and when I reached the outer parts of the pulp I wondered why those are less sweet. Whether or not the sugar occurs in crystalline form in watermelons is still an ...
6
votes
2answers
413 views

Is it possible to genetically modify a plant at home?

Would I be able to genetically modify a plant at home? What equipment will be necessary? I think it might be a fun change from the 'norm'. Are some plants easier to modify than others?
3
votes
1answer
90 views

Are there any air-plants with parts that are edible for humans?

Are any air plants (Tillansia sp.) safe for humans to eat? I haven't been able to find whether or not there are. Pineapple is in the same family (Bromeliaceae), but isn't an air plant.
7
votes
1answer
112 views

How did these apples grow together?

I came through this pic while scrolling through facebook, and it was a bit strange to me. As far as I know apples have a corymbose type of inflorescence, in which a single pedicel ends in a single ...
2
votes
1answer
237 views

How is this yellow bumblebee called that I photographed in New York City?

Does anybody know the name of this bumblebee? (For categorization on wikipedia commons)
3
votes
1answer
487 views

What is the name of this flower with purple leaves and orange inner part in NYC?

I've photographed this flower a few days ago in New York City: Does anybody know the name of it? (and how is the orange part called?)
2
votes
1answer
45 views

Is it dangerous to eat a mutated eggplant descended from a radioactive ancestor?

What is the risk, if any, associated with eating a 100th-generation mutated eggplant derived from a radioactive ancestor? In another word, is that possible that organic toxin will be produced by the ...
3
votes
1answer
62 views

What is the name of this plant?

This plant was found growing in Germany. I have never seen it before, reverse Google image search did not help either. Can you help me identify what type of plant this is? Thanks, looks like it ...
3
votes
1answer
58 views

why are neutral [sterile] female flowers present in inflorescences when they are reproductively incompatible

in many compound and special inflorescences like spadix and hypanthodium there are sterile female flowers along with male and female fertile flowers and are often present in between male and female ...
0
votes
1answer
30 views

Significance of synthesis of D-glucose in plants..?

why plants can only synthesize D-glucose why not L-glucose along with D glucose. I know it very well that plants have only enzymes which can synthesize D-glucose but Why not they have enzymes which ...
2
votes
1answer
33 views

How can I determine the gender of a tree seedling?

I would like to plant some home grown female mulberry trees in a circle, with a male plant in the center for pollination. How do I determine the gender of a tree seedling? I know it's possible, ...
0
votes
1answer
14 views

What is the difference between drought resistant non-succulent plants and plants that cannot be allowed to dry out?

What features make one plant able to withstand dry spells better than another with relatively similar structure? For instance, one of my Rudbeckias is wilting from drought at the moment, and an ...
1
vote
1answer
26 views

What is the name of this type of inflorescence?

I was having a look at a rhizophora plant (from the mangrove family), and I got curious about its inflorescence. I can't make out what kind of inflorescence it is. Here is a photo of the ...
3
votes
1answer
49 views

How does boiling water revive cut flowers?

A classic tip to revive wilted cut flowers is to plunge the stem into boiling water for some period of time, and then back into cold water. What process is occurring that causes the flower to be ...
0
votes
0answers
24 views

Basic chemistry of the Shinoda test for flavonoids? [migrated]

In this test, four pieces of magnesium fillings (ribbon) are added to the ethanolic extract followed by a few drops of concentrated hydrochloric acid. A reddish colour indicates the presence of ...
2
votes
1answer
67 views

How do some plants grow in salt water, while others die?

My question is basically out of curiosity and comes from observing how certain plants (such as mangroves) can grow in seawater. If this gives the plant an advantage, why haven't all plants that grow ...
2
votes
2answers
72 views

What is doubling of genetic material invented in flowering plants?

David Attenborough in his Kingdom of Plants 3D said, that flowering plants made two inventions: (1) doubling of genetic material and (2) symbiosis with animals. What was meant by "doubling of genetic ...
3
votes
2answers
74 views

Where do trees get their shape?

Does anyone know any good resources dealing with shapes of trees? For example, pine trees are cone shaped for optimal absorption of sunlight, but lone pine trees growing in isolation (and other ...
3
votes
1answer
43 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 ...
1
vote
1answer
24 views

Silene virginica Endangered in FL

Why is Silene virginica, colloquially known as Fire Pink, endangered in Florida? What factors besides human industrialization are affecting its survival there?
8
votes
3answers
2k views

What's the worst that can happen from eating too many spicy peppers? Can you die?

Some peppers, such as the habanero or Carolina reaper are extremely spicy, and when eaten in larger amounts than one is accustomed to, can cause some discomfort. I've also heard anecdotes claiming ...
5
votes
3answers
120 views

Why are there no tree-like plants that grow in lakes?

Looking at aerial photos of boreal forests, with dense woods clear-cut by quiet lakes, I wondered why exactly are the woods so clear-cut at the edge of water? Why won't trees develop adaptations that ...
2
votes
1answer
46 views

Plant's phylogeny tree to identify which of them are closer (genetically) with another plant

I'am trying to create a phylogeny tree from some plants, as the post's title says, to help me conclude which of those plants are closer genetically with another one plant. So let's say that this is ...
1
vote
1answer
53 views

Why the plants are not black but green? [duplicate]

if the evolution makes the species better then why the leaf and trees are not black?? black colour absorbs more ligth than simply the green color so a black plant should make photosinthesis better ...
4
votes
1answer
77 views

How does a pine cone open?

When a pine cone is wet, it remains closed. However, when it's dry it opens again. From the perspective of physics or biomechanics, what is the mechanism that allows a pine cone to open and close as ...
1
vote
1answer
65 views

What is the current molecular explanation of Mendel's pea cross?

With reference to the simplest Punnet square for Mendel's pea plant experiments it occurred to me that I could not connect the little I know about genetics to the little I know about molecules. The ...
2
votes
2answers
33 views

In which direction plants' root grow in weightlessness? [duplicate]

As far as I know, roots of plants grow to the direction of Earth's gravity - this is called gravitropism. But what happens if plants are in space? Are they able to perceive gravity in state of ...
1
vote
1answer
45 views

identification of this flower

I saw this flower in Pulau Ubin in Singapore. Can anyone identify the species of this flower? Thanks in advance!
1
vote
1answer
50 views

identification of species of tree

I just want to confirm the species of the tree in the middle of the picture. Is it the "Flame of the Forest"? This is taken in my school campus. Thanks in advance!
2
votes
1answer
36 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.
2
votes
1answer
27 views

Why do oranges in the US have a small separate part?

Why do oranges in the US have a small separate detachable part at the tip which is separate from the other pods? It looks like a tiny orange itself and has a long fiber attached to it.
1
vote
1answer
64 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 ...
6
votes
3answers
339 views

Why are there ecosystems?

Why would things self-organize in such a manner? I'm a mathematician and I have no baggage in ecology or biology. If the question is too broad maybe someone can point me to formal sources where this ...
1
vote
1answer
26 views

How can a YAC be screened against a cDNA library and a cosmid library of genomic DNA to find a gene?

I am reading fw2.2: A Quantitative Trait Locus Key to the Evolution of Tomato Fruit Size (doi: 10.1126/science.289.5476.85). The authors are trying to find the gene that makes tomatoes bigger. As far ...
0
votes
0answers
29 views

Antimicrobial Compounds in Common Plants?

Are there any common plants that contain compounds with anti-microbial effects? I tried googling the answer, but got bogged down in bio-jargon abstracts. What I'm really looking for is some plant that ...
4
votes
1answer
101 views

Sexual Differentiation in Monoecious plants with unisexual flowers

In monoecious plants having unisexual flowers (eg Zea Mays, Ricinus Communis etc), there must be some mechanism as to produce two sexually distinct flowers from the same genotype. Since both the type ...
2
votes
1answer
66 views

What is this plant?

I really like this plant--I'm just wondering what its name is (perhaps genus+species). I think this plant grows in the tropical rainforest in Malaysia. Any suggestions? Thanks!
1
vote
1answer
42 views

Does Yerba Mate contain Beta carbolines like harman and norharman?

I know that this is true of (roasted) coffee but haven't been able to find any reliable information about mate in its smoked or steamed state. Thank you.
1
vote
2answers
36 views

Clarification on Hatch and slack pathway

The following is a minor clarification that I want to make, since it is rarely addressed directly in most of the texts I have gone through. In $C_4$ pathway, the chloroplasts are dimorphic, that ...
3
votes
2answers
51 views

Why do humans circulate monosaccharides instead of disaccharides as in plants?

Plants transport food mostly in the form of disaccharides like sucrose but humans transport them in the form of a monosaccharide - glucose. What is the reason behind this ?
0
votes
2answers
87 views

Why can we breathe only oxygen?

Plants has the capacity to take in both CO2 and oxygen, that's during day CO2 and at night oxygen. Why don't humans have such a capability?
1
vote
1answer
45 views

Botany related question: liverwort sporophyte

Is perianth part of the sporophyte or gametophyte in liverworts (Marchantiophyta)?
2
votes
1answer
85 views

what is the difference between early blight of potato and late blight of potato?

apart from different fungus causing these diseases in potato, how are Early Blight of potato and Late blight of potato different?
3
votes
1answer
57 views

H2S as a source of electrons for plants

The first electron source for plants was H2S, but now most modern plants use H2O as an electron source. What is the advantage of using H2O instead of H2S?
5
votes
2answers
99 views

Can you tell the sex of a white willow when it's not flowering?

Can you tell whether a salix alba tree will produce male flowers or female flowers by looking at it, touching it or generally using your unaided senses? If not, is there any way to do that without ...
5
votes
1answer
69 views

Why does wood become darker when it ages?

I have lots of pieces of pine furniture which have different colours depending on how old they are. So, I just wondered why that is. I guess it has something to do with structures and chemical ...
5
votes
1answer
56 views

How are Raunkiær's plant life forms viewed today?

At the beginning of the 20th century, Raunkiær proposed a typology of plant life-forms based on where they bear their buds, roughly as: cryptophytes: belowground hemicryptophytes: at the surface ...
4
votes
1answer
54 views

How much cost would artificial pollination add to common products (fruits etc.)?

I've read about ecosystem services and their possible valuation - statements like "honeybee pollination service in the US is worth 1.6 billion dollars". Is data available on how this would affect the ...