i have to give a short and good talk about any topic in biology on (21st Aug), Plz help me with the topic...??

Answer 1

if u are in school then do something people dont know about much and is easy u will shine!
my sugession- Forensic Medicine, brain tumor
Ya you will find lots of presentations on search engines

Answer 2

Talk about the topic you are most interested in and you have more knowledge in.
Eg. if you are interested in the human body, you can talk about :

-DNA, RNA (not easy)
-digestive system
-cell components (seems more manageable)
-Proteins
-Carbohydrates
-The different fields of biology
brief introduction
-microbiology, biochemistry, cell and molecular biology, virology, plant biology, marine biology etc
-Just introduce what the field is about and that is about all.

-The importance of chemistry in studying biology

-What you can do with a biology diploma or degree

more difficult topics:
-Biotechnology
-Genetically modified food
-Bioethics
-Evolution
-Intelligent Design

Answer 3

DNA - always fascinating.
I read somewhere that the liquid crystal structure of DNA actually lases (yes, like a laser) as part of the process of duplication and regeneration.
Or something like that.....
Oh and it also shows properties of non-locality -
that is, photons dance in and out of existence along the length of the chain, as the molecule refers back to previously constructed sections in order to get the coding right.

Dunno....check it out.


Oh, and some other weird sh*t - DNA, when irradiated with weak lasers of a certain wavelength, generates a phantom field that gets scientists talking about new vacuum sub-structures.......

Answer 4

Personally, I've always found bioluminescence, biomimicry and almost anything on morphological adaptation to be fascinating. LOTS of stuff on the web about them all. Deep sea vent (black smoker) fauna and their bio-mechanisms for using/coping with H2S is really cool too. Lots and lots of potential topics depending on your interest and how much effort you are willing to put in.

Good luck.

Answer 5

the blazing topic in biology today is the use of gene transfer and its various applications for human benefit like preparation of genetically engineered vaccines{like the hepatitis b vaccine} , medications {like insulin prepared from E. coli}, and many others.
hopethis helps
all the best!

Answer 6

i think the the best topic to discuss is the genetic mutation.... check out that its nice to do. and send the topic u choose and describe the topic if possible

Answer 7

how about on membrane transplant? giving u a brief overview. if u need more u could do some research yourself on that.

Membrane Transport Mechanisms
There are four primary means that water and other small molecules cross into or out of cells. They are reviewed here since they play such an important role in body fluids and many other physiological functions.

Diffusion
Powered by random movement of molecules in a solution
Net movement is from regions of high concentration to low.
Does not saturate as the concentration or gradient changes
Diffusion of different substances do not interfere with each other (no competition).
Net flux (amount of movement) is proportional to the concentration difference and the permeability of any barrier like a membrane.
Substances can cross membranes by diffusion if they can dissolve in the oily interior of the membrane (hydrophobic)
Diffusion can occur through tight junctions or within bulk solutions.
Diffusion of water down its concentration gradient is called osmosis.
Facilitated Diffusion
Proteins act as carriers or pores permit flux of substances that cannot diffuse directly through the membrane.
Movement is still passive (like diffusion), from high concentration to low.
Occurs across cell membranes only.
Saturates when substance reaches high concentrations due to lack of available protein.
Related substances can compete for the same carrier or pore.
Maximum rate of transport (fully saturated) is called Tm, the transport maximum.

Primary Active Transport
Proteins in the membrane can also act as pumps.
Move ions or small molecules from low concentration to high concentration (i.e. up their gradients).
Require cellular energy, usually as ATP
Saturates when substance reaches high concentrations due to lack of available protein.
Example: Na-K ATPase Present in nearly every cell in the body
Pumps 3 Na ions out in exchange for 2 K ions pumped in (cost=1 ATP)

Other pumps include the Ca-ATPase, and the H-ATPase.

Secondary Active Transport


Uses proteins similar to those for facilitated diffusion.
Couples the movement of several different molecules in each cycle.
Saturates when substance reaches high concentrations due to lack of available protein.
Cotransport moves 2 or more molecules in the same direction across the membrane.
Counter transport moves molecules in opposite directions.
The gradient for one molecule can cause the other to move against its own diffusion gradient.
Normal active transport (Na-K ATPase) makes a strong Na gradient, which in turn powers many secondary active transport mechanisms.
Example: Na-Glucose cotransport.

Answer 8

The different types of cloning and the controversys surrounding it (natural cell cloning through mitosis and whatever and then organ cloning and so on) there are tons of places you can look all of this up just start at google...

Answer 9

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Answer 10

I think the topic wd be from reproduction chapter