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Biology; Chemistry; Physics: Post your doubts here!

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What about it? Both are pretty easy chapters. Just open the book (Mary Jones has it - not sure which else) or use notes on it. Google them - like "biology o level microorganism and biotechnology notes". Can also find on this site.

Don't worry, lots of time left, you'll learn them EASILY. :)
It would b kind of u to post some sources please :( :( ?
 
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May sound noobish - but cant find anything in book.

what are leguminous plants? what is a legume?
-have legumes (e.g. pea plant and beans)
- need more nitrogen
-have root nodules which contain Nitrogen-Fixing Bacteria, which use Nitrogen gas and oxygen gas to produce NO2 and NO3
 
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A is answer. B, C and D stop sperms, which is wrong since egg is fertilized.

I googled A and it looks like it puts some plastic over the uterus lining or something.
but it says Which method of birth control prevents the implantation of the *fertilized* egg. that means the sperms do fertilise egg and form zygote but do not get implanted.
but the right answer given is A.
 
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In genetics, do we have to learn about basic units of DNA; deoxyribose, phosphate group, bases andall that?
 
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