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

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235 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, ...
1
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1answer
39 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
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1answer
232 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 ...
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1answer
54 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.
3
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2answers
163 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
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1answer
53 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 ...
2
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2answers
109 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 ...
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1answer
64 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!
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1answer
589 views

Do trees age on a microscopic level?

Most animals age via at least two mechinisms: at a "macroscopic" level, basically wear and tear to the point where (on evolutionary time scales) it's more genetically advantageous to optimize for ...
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1answer
25 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?
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3answers
6k 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 ...
2
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1answer
116 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 ...
2
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1answer
81 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 ...
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3answers
371 views

Can plants get cancer?

I can't think of any reason why plants wouldn't be able to get cancer, but I've never heard of a plant growing a tumor. I've also never seen a plant with a noticeable abnormal growth. Can plants get ...
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2answers
552 views

How do white Caladiums perform enough photosynthesis to support their mass?

In some white caladiums, there is less than a square inch of green space spread over the whole leaf. How do these plants perform the photosynthesis necessary to support the large leaves, the roots, ...
6
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1answer
670 views

Do immature fruits perform photosynthesis?

Most immature fruits are green: peppers, pine cones, plums, lots of them. I want to know if the green is from chlorophyll in the cells. Do the fruit cells perform photosynthesis? When you cover a ...
4
votes
1answer
637 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 ...
2
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2answers
43 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 ...
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1answer
87 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 ...
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1answer
60 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!
2
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1answer
35 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.
2
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1answer
48 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.
1
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1answer
160 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
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3answers
380 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 ...
2
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1answer
43 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 ...
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1answer
64 views

Is Schoons Hard Shell muskmelon a hybrid?

Would Schoon's Hard Shell muskmelon be considered a hybrid as I have read it was a cross between a Bender's Surprise and a Honey Rock.
4
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1answer
177 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
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1answer
88 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!
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2answers
2k views

Online course on Plant Taxonomy and Physiology

After following a course in Permaculture, I realised that if I want to get serious about it, I need to be able to distinguish plants. So I am looking for an online Video course on Plant Taxonomy and ...
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2answers
80 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 ?
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2answers
214 views

Why don't plants get sunburned?

I just saw a video about the biology between sunburn, UVA and UVB and the different things we know about sunburn in humans. ( http://www.youtube.com/watch?v=ZSJITdsTze0 ) I wonder what keeps plants ...
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2answers
5k views

How do trees use Adhesion and Cohesion to move water against gravity?

I have an AP Bio class where I have to name 3 properties of water and I chose adhesion and cohesion for one of them. I'm having trouble finding out how exactly trees use adhesion and cohesion to move ...
7
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1answer
121 views

Any food crops that could grow in a desert provided that they get fertilizer and water

I am working on an idea to provide nearly unlimited amounts of water in desert regions. To make this commercially viable. I would use the water to irrigate desert sand and grow crops. Given my ...
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1answer
64 views

Botany related question: liverwort sporophyte

Is perianth part of the sporophyte or gametophyte in liverworts (Marchantiophyta)?
3
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1answer
419 views

When happens when pollen grains land on the a part other than the stigma of a flower of the same species?

When happens when pollen grains land on the a part other than the stigma of a flower of the same species? Would the pollen be transported to the stigma or would it just sit where it landed and nothing ...
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3answers
5k views

What's the difference between a plant and an animal?

Are there some living things where the distinction between plant and animal is blurry or unclear? I wouldn't know where to put something like yeast. I also thought of photosynthesis, but then I ...
5
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2answers
118 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 ...
6
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1answer
616 views

Regulation in plants bearing cleistogamous and chasmogamous flowers

In most plants bearing cleistogamous flowers, chasmogamous flowers are also borne by the plants. For example, Viola, Oxalis and Commelina contain both these kinds of flowers.( I am unaware of a ...
5
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1answer
205 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 ...
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1answer
937 views

Is there any natural blue rose?

I had recently read an article that the possibility of having natural blue rose is extremely rare because of the absence of delphinidin in most roses. Are all blue roses just a product of ...
2
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0answers
46 views

Embryo activity during seed dormancy?

What metabolic processes does a dormant embryo in a seed carry out? The newly produced seed will not germinate, either because of a lack of favourable conditions, seed hibernation, or because of a ...
9
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4answers
3k views

Why we have no enzyme to digest cellulose?

As we know, cellulose is the most abundant polysaccharide in nature. Why don't we have any enzyme to digest cellulose?
5
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1answer
77 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
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1answer
63 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 ...
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2answers
615 views

What does dominant generation mean

In my texbook it is written that for non- vascular seedless plants the dominant generation is the gametophyte as the gametophyte generation is larger and longer lived. Is the criteria for dominant ...
0
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1answer
200 views

Scientific name for the union point of a plant stem and root

Is there a word that describes the meeting point of a plants growing stem and its root? Is this the same term for aerial roots above soil level?
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1answer
85 views

Artificial Propagation and it's relation to asexual reproduction

I know that asexual reproduction is also called vegetative reproduction. However I do not understand it's relation to artificial propagation. Is it a technique used for asexual reproduction (the ...
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1answer
74 views

Terms related to megasporogenesis

Well, I am not able to understand the exact difference between megasporocyte and archesporium. Also I'm not quite able to get, how or precisely from where do these arise? Please help.
0
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1answer
45 views

Seed Germination

Is my understand of how seed germination comes to be and what it entails correct? Seed germination: As the seed matures it loses water and enters dormancy (a state in which it’s metabolic processes ...
3
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1answer
33 views

Seed Dormancy and Seed Transportation

My textbook says "As the seed matures it loses water and enter dormancy". I am confused as to whether this happens before the seeds are transported or after, and as to how seeds know to become dormant ...