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百度 家长工作之余没有时间在放学后去接孩子，但是孩子到下午三点半就放学，这造成了很大困扰，成为成长中的烦恼、发展中的困难。
The biological process by which new individuals are formed.
6 questions from the last 365 days
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What's the weight of a human zygote?
This is 2025, and I figured that a simple Google search would answer very quickly, easily, and definitively my straightforward question:
What is the mass of a fertilized human ovum?
Well, Google's &...
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When is the second polar body formed — before, during, or after fertilization?
I’m trying to understand the timing of the formation of the second polar body in humans. I know that the second polar body is released after the completion of meiosis II, but I’m confused about the ...
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How does a giraffe fetus lie in the womb
As I understood it they are exiting "superman style" (is that in order to stop the fall with ther front legs instead of head?), so my guess would be backlegs legs somewhat like that as a ...
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How do Male Water Opossums' Pouches Function
I stumbled on this question where the answer claims, "The males of both the thylacine and water opposum used/use their pouch to keep their genitalia from getting entangled in vegetation." ...
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Is it possible that mosquitoes have been laying eggs and reproducing inside my house?
I am in Southern India. It is the rainy season now, so plenty of mosquitoes everywhere. I like to think my house is pretty well sealed off with mosquito nets in all openings, though.
Once in a while, ...
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What is the ploidy of endosperm formed through apomixis
From my limited knowledge, apomixis there is no fertilization. And there is no meiosis either.
So how does the mechanism for this come about and how can we find out the ploidy of the endosperm formed?
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