Questions tagged [growth]

In reference to a biological system over time, growth refers to the increase in physical size/mass as well as the progression through its life cycle.

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Plant growth in blue light

For the past two weeks, I have been in a group of 3 studying how different lights affect plant growth. So we growth two chickpeas plants and put one in white light and the other in blue light. These ...
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Do babies have a fight or flight response?

Do babies react in the same way as young children and adults in regards to the fight or flight response? If they do not respond in a similar way or don't have a fight or flight response at all then at ...
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What to do with this Araucaria sprout

I live in Santiago, Chile, and I see this Araucaria frequently: For what I have read, it seems to be a female A. angustifolia individual (leaves are 2-3 cm long and a few mm wide, with a very sharp ...
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Is there a law that defines an upper bound for the speed of growth of an organism?

I was wondering if there is some biological law (or chemical/physical law for that matter) that limits how fast an organism can grow. I know that the growth of a plant is often restricted by the ...
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Cause-and-effect questions about growth and development of plant

I need to solve some cause-and-effect problems. The problems are related to growth and development of plant. "Growth and Development" chapter is the first chapter in third level of high ...
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Why are humans only so tall/large?

In biology I've learned that cells rapidly divide and can grow and split undefintely, and that certain parts of the body have to grow and evolve before growing, but I am tied up on the fact that the ...
Randy Huang's user avatar
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Can the human body store protein?

I am interested to know if a human body can store protein. Absolutely for the bodybuilders, does it really matter if they divide their protein consumption during the day or eat all of it in one meal ...
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Why do cherries sometimes grow as triplets?

Usually when I think of cherries, I think of them as pairs. I think most of us imagine them that way, but recently, I stumbled on a picture of a triple cherry: Which I found interesting, but I couldn'...
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what is the difference between pituitary dwarfism and thyroid dwarfism? [closed]

My book (Comprehensive Biology class XI, by J P Sharma ) mentions of two kinds of dwarfism- "Pituitary Dwarfism" and "Thyroid Dwarfism" but does not provide any details about the matter. so please ...
jyoti proy's user avatar
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Why do humans stop growing? [closed]

Humans grow most quickly when young, and to a lesser extent in preadolescence and early adolescence. However an equilibrium is then reached in adulthood, typically at around 1.6/1.7 meters tall. I ...
ConfusedJeff's user avatar
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How are some people able to continue growing after reaching maturity?

This is technically a cross-post of a question posted last year concerning gigantism and how certain people are able to grow far past expectations after it's assumed they've reached maturity. How are ...
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The properties of benign tumours

Do benign tumours have no functioning apoptosis mechanisms ? If so what stops benign tumours from excessive growth? Also can a benign tumour have a functioning apoptosis mechanism?
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How to measure growth of algae with colorimeter

I am doing an lab for IB Bio and don't know how to use a colorimeter to measure growth in algae. The experiment I am doing will measure the effect of pH on algae growth. The algae will be taken from a ...
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Pituitary giants - is the fusing of growth plates dependent on amount of growth hormone in blood?

I wanted to ask a couple questions related to pituitary giants (people who are giants because of some anomaly, such as a tumor, in their pituitary gland). Some of these giants seem to keep growing ...
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Does the process of photosynthesis occur in insectivorous plants? [closed]

Does the process of photosynthesis occur in insectivorous plants? Can you please give me a clear answer and explain to me how? and also can you describe the environment in which they grow ? Thank you
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Can growth rate be used as an indicator of fitness in fish populations?

I would like to calculate selection gradients in order to gain insight into the strength and type of selection influencing my study population. (see here for review. http://jgking.web.unc.edu/files/...
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Archenteron vs Gastrocoele

What is Difference between “Archenteron” and “Gastrocoele”. Are they same or different? Gastrula is characterized by Archenteron or Gastrocoele or Both?
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due to hypersecretion of growth hormone why only terminal growth takes place?

why only terminal growth takes place in acromegaly and gagiantism, due hypersecretion of GH?
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Is an animal's body height dependent on its environment?

Imagine the follwing situation: a newly born animal is brought into a small room. This room has no windows, but artifical light to imitate the sunlight. Furthermore, this light behaves like the sun, ...
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Are nastic responses growth responses?

I know they are non directional movement responses, but like tropic responses, does their movement involve growth?
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Growth of Axons

Does anybody know a paper in which the growth of axons, i. e. their length in dependence of time was measured? I did some literature mining myself, but couldn' t find any results. I'm looking for a ...
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Prevent clumping of bacteria in my media so that I can measure turbidity?

Forgive my naivety, I'm an undergraduate Chemical Engineering student doing research this summer into growth rates of various combinations of bacterial isolates. I have about 9 isolates from a toxic ...
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Is it possible to simulate the effects of high altitudes for plants?

Note- I considered asking this on gardening.stackexchange.com but i believe it is better suited for this site since it deals with more complicated material. As I understand it, certain plants (...
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Genetically improved *Leucaena leucocephala* seeds

I am looking for fast growing Leucaena leucocephala seeds. Now, I am cultivating Leucaena leucocephala which can grow 6 meters in a year. But I am looking for a genetically improved seed which can ...
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Refuge impact on growth rate

I have a question related to the refuge effect in ecological models. The assumption is that the population of hosts/prey is divided into two groups. One group consists of individuals that are safe ...
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Is it viable to make liquid potassium ferilizer through dissolving very small amounts of potassium chloride in water

I wasn't able to find fertiliser online that was simply potassium chloride and I didnt want to source my potassium chloride solution from potassium sulphate or other general NPK fertilisers for my ...
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Is process, opposite for growth, known for mammals?

Every animal born small, then grow larger and larger. The same is true for parts of the animal bodies. Is there any cases, when body or part of the body diminishes in size and mass, while staying ...
Suzan Cioc's user avatar
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There are some species that grow throughout their lives -- is there evidence that even in adulthood their brains increase in size?

One species I have read about is carp whose growth is limited only by food supply and space. One can actually, because their skin is almost transparent, see their brains and it sure does look like ...
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How do trees grow?

A nail is inserted into a tree's trunk at a young stage of its development. At which height will we find the nail after some years? Will it be found higher or at the same height(What extent of ...
Siva Manasan's user avatar
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At what age does the mouse skull stop growing?

Unless otherwise mandated, neuroscientific research on mice is done with ~7-week old animals. There is a sort-of mantra that at this age their skulls stop growing. However, recently, I noticed a ...
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Growing Penicillium Digitatum Mold

I left a cup of tea with Lemmon on my desk and after a while green mold start growing on the water. From my understating this is Penicillium digitatum. I gave it some sugar and after one day black ...
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Why is it desirable to couple chemical production to growth?

I have the following question in systems biology: a) Draw a graph showing the relationship of growth (Vbio) and Vefni for the system here. (Let the horizontal axis represent Vbio and the vertical axis ...
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A question about microbes growing media

I was told in my microbiology course that blood agar can be put in GasPak system (anearobic) to grow strict anaerobes, but why would someone use blood-dependent bacteria in this experiment as these ...
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Growth rate oscillation in the a population of non-interacting bacteria

I have come across this theoretical paper claiming that if you start a batch culture from a single E. coli cell, the exponential growth rate of the population defined as $$k = \frac1N \frac{dN}{dt}$$ ...
stochastic's user avatar
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What is Growth and how can we define it to be a defining property of life?

I was reading a book and it said that internal/intrinsic growth is defining property of life and not extrinsic growth as saying accumulation of dust on a book makes it a bit bigger, even if it is by a ...
Abner Alfred Thompson's user avatar
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Measuring optical density with/without re-suspending cells

When measuring absorbance using a plate reader, is it necessary (or better) to resuspend the culture if the plate has been sitting still for 1-2 days? While this could be a good physics question, I ...
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Can plants grow healthily being watered in either deionized or distilled water? [closed]

I want to use deionized/distilled water to water plants from some. I have the choice whether to use tap water, deionized water or distilled water that come from a closed system that has a water cycle, ...
Gal Grünfeld's user avatar
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The correlation between a leaf's age and its length in the initial stage of growth [closed]

I am building a machine learning algorithm which predicts the age of a leaf before its maturity period based on its measured length or area. I would like to know whether there is a mathematical ...
Siddhant Kumar's user avatar
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Beyond anabolism, what are factors that restrict growth rate?

Beyond obvious constraints in the case of nutrient limitation, what can explain the relatively slow growth rate of cells in rich media? Lab strains of E. coli grow really, really fast. The cell ...
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Does a cell deprived of growth factors undergo apoptosis or G0 stasis?

I can't seem to find a decisive answer on this topic in any of my textbooks. If a cell is deprived of growth factors does it: Activate apoptosis Go into the G0 phase but keep living? Thanks.
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Selective pressure for reduced rates of growth and maturity in primates

Humans are somewhat notable for the slow rate at which they grow and reach physical maturity. Some related primates also take over a decade to reach sexual maturity. However, many mammals – ...
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What determines when plants grow?

I am interested in dryland ecosystems, and I am trying to find material on what determines the time at which plants in dryland ecosystems, either shrubs or grasses, grow and shoot? Is it only related ...
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What makes delayed onset muscle soreness stop occurring?

If someone lifts weights or takes a long jog after not doing it for a while, they can experience delayed onset muscle soreness (DOMS). However, when they return to the same exercise days afterwards, ...
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Wet weight measurements: Setting up cultures for measuring growth rate via wet weight

I have some isolates which I am trying to grow in some toxic leachate in order to measure their growth rate I also want to measure the growth rates of certain combinations of these bacteria. I've ...
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Values of Miu_max and Ks from parameter estimation?

Background I have this simple biomass growth model: $$ \mu = \mu_{max}\cdot \left(\frac{S}{K_S+S}\right) \cdot \left(\frac{1}{1+S/K_{iS}}\right) \cdot \left(\frac{K_{iP}}{K_{iP}+P}\right) \\ \frac{...
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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 ...
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Which of these methods is both effective and reliable in elongate muscle and tendon for use in humans: growth factors or stem cell technology

Which method is it the most effective, but also the most reliable for elongating muscle and tendons for clinical trial; using modern growth factor technology or using modern stem cell technology? ...
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Calculating the canopy size (crown) of a newly planted tree at a future date

Assuming that one knows the maximum area of the canopy and the age of the tree when it achieves this. And given an initial canopy size from the nursery. How would I calculate the canopy size at a ...
niallhaslam's user avatar
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Does Acromegaly cause actual expansion of the zygomatic(cheek) bone

Acromegaly is a disorder in adults involving excess growth hormone production. Since epiphyseal fusion has already taken place in most bones of adults , this does not cause an increase in stature. ...
Eridanus's user avatar
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Giant insects growing question

During the dinosaurs time 100-200 million years ago there were giant insects like 1 meter long. An example is here. One of the theories why they could grow this big is that oxygen level was much ...
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