Frank Palmay from mississauga asks

I understand the concept of dominant and recessive alleles but I was wondering why some alleles are...

Nick (via his mother Illan) from Denver, Colorado asks

I put frozen spinach, fresh spinach, canned spinach, frozen peaches, fresh peaches and canned...

Julie from Portland, Oregon asks

How are sand dollars bleached white? Is it by the sun or the sea?

Kate Cunningham from Wellington NZ asks

I saw you answer to the composition of banana peels, but I would really like to know what chemical...

Nancy rosamond from Owen Sound, Ontario asks

When I grew up most oranges grapes and other fruit had seeds. This was the normal fruit and...

Steph from London, England asks

I've often wondered about this. It's kind of complicated, so bear with me... If a person suddenly...

Jonathan from Kuala Lumpur, Malaysia asks

Is it possible for the air that we breathe to either run out or deteriorate to such an extent that...

Jim from Philadelphia asks

Why doesn't a person lose 9 lb when they consume 1 litre of ice water? If a calorie is the energy...

Katlin from Springville, NY asks

How many languages are there in the world?

Avadhuta Raya from Amsterdam asks

I imagine there must be a gene for lactose tolerance in mammals and humans? They have to have it,...

Sarah from Fredericton, NB asks

What is the chemical in banana that causes drowsiness?

Marc Baldwin from the Internet asks

In their book on the 'Mammals of Britain and Europe', MacDonald and Barrett state that Red Foxes...

Sam asks

There is this question in my physics book asking me to check out the ways plants wrap themselves...

Angie from New Tripoli, PA asks

What goes on during the change between isometric and isotonic in muscle cells? What does it look...

Jeremy Wolf from Kintnersville, PA asks

Has anyone tried a vaccine (attenuated, similar pathogen, killed, toxoid, or subunit vaccine) for...

Drew Radue from Wisconsin asks

Will Cyanide be a poison to brewer's yeast used to make beer?

Bethany Garrison from Summerville, SC asks

My mom and I are having an argument. She claims that the gene for blonde hair will be wiped out...

Manny from Kanata, Ontario asks

Does caffeine affect  boys and girls' blood pressure differently?

Robin from Brighton asks

How is it that some people can 'float' while others seem unable to? In the sea I can quite happily...

Dan Van Brunt from Thunder Bay asks

Recently a friend of mine took a picture of what he thought was a grasshopper out at his camp far...

Ashis from Mumbai asks

I want to know how ascorbic acid (vitamin-c) is metabolised in the body of fishes.

Davina from Vancouver, Canada asks

Why is it that when you get the chicken pox when you're little it's not as bad as getting it when...

Reatha Tillman from Ocean Pines, MD asks

A student gave me 4 pairs of different duck and goose feet. How can I preserve them? Do I dry them...

Brandon from cleveland asks

How long does it take bubble gum to digest after it is swallowed?

Avishan from the Internet asks

What gives yellow corn and blue corn its color? What is the specific pigment and why?

Bryn Williams from Vancouver asks

If the telomeres of a cloned organism are smaller than a non-cloned organism, and therefore may...

Kirsty from Cumbria asks

Why do both sexes of dabbling ducks have brightly coloured bills?

Jessica Hawthorn from Lac La Biche, Alberta, Canada asks

What experience and education should I get for a career in paleontology?

Dennis from the Internet asks

Could you explain how to complete and find the genotypes and phenotypes of sexlinked, multiple...

theo baker from santa barbara asks

I have heard somewhere that there is what could be described as a secondary brain in the large...

Rick James from palm springs asks

I'm just curious why we humans are the only species on this planet that have to manufacturer...

Dean Jones from Saskatoon asks

Why do we not have a mouthwash that prevents plaque buildup and, hence, gum disease?

Mike from Hamilton asks

Who discoverd dinosaurs? Tyrell?

jehan asks

Are liposomes currently being used to cure cystic fibrosis. How is this done?

Nesa Xiong from Sacramento, CA asks

How long does it takes your hair to grow? How many years and how many inches?

Michelle asks

I want to study and work with animals and their environment. Is there an occupation like this? What...

Brian from Vancouver, BC asks

I've heard that alcohol can be passed to a baby through breast milk. Is this true and if so what is...

Diana from Tucson asks

How large is a human genome? What percentage of the DNA in the Human Genome actually codes for...

Ben Marengo from Manchester, England! asks

Why does a sperm in the female reproductive system not get attacked? It has foreign antigens, which...

Donald from St. Johns, Newfoundland asks

Comparing the storage capacity of the human brain to computers, if data and memories in a human...