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The process through which a biological organism grows to maturity. In certain contexts it can mean the changes the organism goes through over its entire lifetime.

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How is the timing of gene expression controlled in developing embryo?

I understand how cell differentiation works in general (gradients of homeobox proteins etc), but how is timing controlled? Why do some genes switch on at a very specific moment of development and then ...
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0answers
34 views

How Does the Body Know a Finger is Fully developed?

When a baby is being developed inside the womb, 1) how does the baby's body know a finger, or any other part of the body, has been fully developed? 2) following question, how does it "stop" the ...
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1answer
23 views

Dynamic of the number of cells over time as the embryo grows

I would like to investigate the dynamic of the number of cells over time as the embryo grows. I am interested in any multicellular animal species for which we can have some data. How does the number ...
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0answers
24 views

Learning tensors for evolutionary or developmental biology

I'm looking for book recommendations on tensor algebra for use in biology. Tensors are being used increasingly in evolutionary biology and developmental biology, it seems. For example, here is an ...
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1answer
40 views

Daphnis Nerii not moving

Its been quite a while since my Daphnis Nerii has passed its eating phase, now its just a sort of recluse and is curled up in one corner and sleeps the whole day. It's a bit brownish in colour now. ...
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0answers
25 views

Difference between morphogens and evocators in development?

I am specifically interested in this within the context of 1950's developmental biology (I presume the meaning and scope of usage of the terms has changed since then), as I am reading Alan Turing's ...
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1answer
68 views

Why can a zygote develop into all different types of cell, whereas a differentiated cell cannot? [closed]

A cell formed by the fertilization between two gametes has all the DNA and can lead the development of a human person (or other animals in other species). But other cells in a human person has also ...
9
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1answer
283 views

What animal has the longest juvenile period?

I just heard the following complaint from a comedienne. Humans are the only animal that is completely useless for the first twenty five years of life. Obviously this is just a joke but it is true ...
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0answers
28 views

Why doesn't Pax6 expression in the pancreas lead to eye formation in the pancreas?

Researchers have been to induce ectopic eye structures in fruit flies using the Sey/Pax6 from mouse. But since Pax6 is also expressed in the pancreas, why is there a different phenotype?
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0answers
49 views

Role of processing bodies in mammalian development

I am currently writing a project proposal for university admissions regarding the duration till which maternal mRNA is required for mammalian development. Till now all the literature I have read has ...
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2answers
145 views

Why does a frog's oxygen intake through the skin and lungs vary throughout the year?

Why does a frogs oxygen intake through the skin and lungs vary throughout the year? And why does the intake through the skin vary slightly while through the lungs dramatically? (Blue line = oxygen ...
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0answers
50 views

Can sperm fertilize egg after it has finished meiosis 2?

We know that there is a mechanism, the cytostatic factor CSF that doesn't allow the Anaphase Promoting Complex (APC) to work by inhibiting it. So in the female oocyte during ovulation chromosomes are ...
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2answers
45 views

Text or source (preferably free) for learning developmental biology

I might have to take a graduate level course in developmental biology, of which I have never taken a course in before. The course website lists no recommended texts. Therefore, I assume we will be ...
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1answer
39 views

Decision-making in tree limb growth?

Sorry if this is a naive question, but it occurred to me as I was walking across campus today; How does a tree decide which limb is allocated the most resources, and thus grows the largest? My first ...
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1answer
293 views

Humans have tails? [duplicate]

Today in biology class, my teacher said that all chordates have all the necessary traits, at least during the embryo stage, and we humans are chordates. So, one of these necessary traits was that they ...
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1answer
52 views

What happens to the language processing brain part if no language is ever learned?

Language is processed in the human brain in multiple regions. Some of them seem to be used exclusively or mainly for language processing, other regions are distributed overlapping with other functions....
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0answers
52 views

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, ...
103
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3answers
22k views

Are male and female brains physically different from birth?

Male and female brains are wired differently according to this article: Maps of neural circuitry showed that on average women's brains were highly connected across the left and right hemispheres, ...
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2answers
38 views

Cell differentiation by non-identical copies

There are in principle two ways that two cells with the same mother cell can differentiate/specialize/diverge: Because they are not perfect identical copies (= different internal influencing factors)....
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1answer
106 views

Why does cell differentiation start with the morula?

I suppose that cell differentation has to start by some external symmetry breaking. The first time there are two different types of cells is the morula with roughly 16 cells: there are some 12-15 ...
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2answers
168 views

What is the real meaning of the statement “*ontogeny recapitulates phylogeny*”? [closed]

I tried searching in this site but couldn't find an appropriate answer to the title question: what is the real meaning of the statement "ontogeny recapitulates phylogeny"?
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1answer
44 views

Interplay of neuritic and synaptic growth

Let me try to give a picture of my understanding of neuritic and synaptic growth and their interplay. Pick two neurons in corresponding areas of opposite hemispheres which are connected by a synapse (...
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0answers
28 views

Do blood vessels expand during angiogenesis?

I know that there are two usual ways of creating new blood vessels: A new vessel sprouts from the wall of an old one, A wall of cells grows down the middle of a vessel, splitting it into two. I also ...
2
votes
1answer
137 views

How to differentiate male and female mosquitoes at pupal stage?

There are many differences between male and female mosquitoes in their adult stage. But for my experiment, I need mosquitoes before they mate. So I need to sort them before they develop in to an adult....
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0answers
21 views

Under which circumstances does muscle hyperplasia happen in humans?

What circumstances allow humans to have muscle hyperplasia in the prenatal and immediately postnatal period that doesn't exist later? Is it about specific hormones that follow through our veins?
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0answers
80 views

How do cells become differentiated using epigenetics despite having the same genome?

How is epigenetics used in the differentiation of cells and is this the only thing that is used? I've seen that transcription factors play a role but are these simply proteins that initially write the ...
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1answer
390 views

Why aren't human babies considered larvae?

I've seen people who are anti-baby describe babies, or children in general, as human larvae. This is generally done in order to make them seem weird. While I feel like this statement is wrong, I can't ...
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0answers
47 views

Are baby centipedes poisonous like the adults?

I know that centipedes have an appendage called "poison claw".But I am not sure if the same is there in the baby centipedes and if its functional like that of the adults. So are baby centipedes ...
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3answers
581 views

What does a female mosquito need from blood?

I have come across many articles stating that female mosquitoes suck blood from vertebrate hosts to develop their eggs. Some also state that they need proteins, carbohydrates, iron etc., from human ...
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0answers
23 views

Is an adaptation against impact of fall a factor in babies' bones' structure?

Obviously, babies' bones need to be flexible to get through the pelvic bone. But is that the only reason? Could it be that as babies aren't able to maintain stability, they need bones less prone to ...
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1answer
31 views

Is O4I2 sufficient to reprogram cells (ie induce pluripotency)? [closed]

Is exposure to the chemical O4I2 (ethyl 2-((4-chlorophenyl)amino)-thiazole-4-carboxylate) sufficient to reprogram an adult cell back to pluripotency? They sell this chemical online for pretty cheap. ...
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0answers
69 views

Why are (most) right hand dominant people also right foot dominant? And the same for left handed/footed people

Just as the title states -- Why do people who are right hand dominant also tend to be right foot dominant? And, the same question for left handed/footed people. Does the brain actually designate an ...
2
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0answers
119 views

Can a mother somehow positively affect fetus during pregnancy?

My mother keeps telling me that I like to study and have a predisposition to it because she was a student when she was pregnant. I highly doubt it, because I can't find any logic in these words. I ...
2
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1answer
82 views

What does “out-titration” mean?

I am reading an article on developmental biology and cannot understand (even after searching the internet) what is meant by "out-titration". For example, in this phrase: We have previously shown ...
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4answers
193 views

How are hereditary neural circuits created in the brain during early development?

Whilst our experiences shape the specifics of our brains throughout life, we know that there are a lot of shared properties between us. We all share the same basic layout as, for example, the V1 ...
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0answers
10 views

Are there any studies detailing the overall “-omics” effects of using bleach to synchronise a C. elegans population?

I wasn’t able to find papers detailing the changes in the transcriptome/proteome of C. elegans when synchronised by bleaching vs not-bleaching. Hopefully someone can point me in the right direction!
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5answers
9k views

How does a baby deer stand the day it's born?

I know most creatures take time to learn some things. Birds take some time to fly. Human beings take some time walk or stand. But in the case of the deer species, it's different. It can stand the ...
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0answers
360 views

Do all body organs grow in proportion during the period of physical development?

It is obvious that during childhood and puberty, the human body grows uniformly or proportionally so that a child's arm length, for example, is shorter than an adult's arm length but is proportional ...
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1answer
3k views

How long before robin no longer needs the nest on my porch?

A robin has made a nest on my porch. Unfortunately, the nest is on my weed wacker which I might want to use at some point this summer. Currently, there are two eggs in the nest. How long will it be ...
2
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0answers
32 views

How thick is the neural tube at Stage 10 in a chick embryo?

As the question states - I am really struggling to find ANY website/paper/article which states this. I want to know if the neural tube is still one cell thick and stage 10 of development. Any evidence ...
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0answers
34 views

Development threshold of a blowfly species differ depending on situation?

Within a species, does the lower development temperature threshold remain the same in all situations (also known as the development zero temperature)? For example, would the temperature threshold be ...
11
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1answer
3k views

Is female the default sex in humans?

I was taught in school that female is the default sex in humans based on the following logic: Development into a human male requires the activation of the SRY gene in the foetus. If that doesn't ...
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1answer
658 views

Is there a difference between an organizer and inducer substance?

There is a question in my Embryology textbook's exercise that asks about an organizer and inducer substance. I found their definitions and now I am wondering if they are the same things?
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0answers
142 views

What is the lifespan of a human skeletal muscle cell (such as in the biceps)?

I have read that most human skeletal muscles (such as those in the biceps) cannot multiply after development (except for exceptional situations of severe damage that involve satellite cells) and that ...
3
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1answer
169 views

Would a clone of myself have exactly the same development (character, appearance) as me?

If I'd have a clone of myself (with my DNA) and I would record the development of that person, would I be able see exactly the same development as myself (same personality, appearance)? For example ...
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1answer
33 views

Why the total phosphorylation of certain neuronal proteins decrease during development?

Looking at the effects of RIM1a which is a protein involved in neurotransmitter release. Any ideas as to why its total phosphorylation decreases as the rats develop? Many thanks Image; https://i....
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1answer
462 views

What is the evolutionary advantage of menstruation?

I was wondering why woman have fertile periods. Based on some simple reasoning I would expect that if woman were always fertile this would increase the chance of reproduction(one of the important ...
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1answer
1k views

Importance of fate maps

I did some normal google.book search and found the two importance of fate maps- 1. They helped establish the idea that communication between different parts of an embryo leads to the formation of new ...
4
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1answer
298 views

How do Sertoli cells protect sperms?

I was reading Developmental biology by Gilbert and stumbled upon a fact that Sertoli cells provide protection to the developing sperms with no futher explanation. I googled it and found a few books ...
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0answers
79 views

What is the evolutionary significance of germ cell migration to gonads?

Why do germ cells have a different origin than the gonadal organs? Does it help the animals in any way? P.S. I know it is difficult to answer whys in biology but is there any theory as why do they ...