Biology - April 2007

Help me answer these questions:
Contrast male and females in terms of # of sex cells matured in a lifetime, size of sex cells, signs of puberty, and chromosome structure
How many chromosomes do humans have? How many are present in the sperm cell? The egg cell?

2007-04-11 12:53:58 · 1 answers · asked by ilovetennis 2

2007-04-11 12:49:32 · 3 answers · asked by Anonymous

Is it possible for two siblings about three years apart to be identical twins?

2007-04-11 12:07:47 · 9 answers · asked by Anonymous

plz respond to this quickly plz plz plz plz plz

2007-04-11 11:34:52 · 4 answers · asked by smilelyface4 2

2007-04-11 11:14:58 · 3 answers · asked by Anonymous

Under what conditions do bacteria thrive and reproduce frequently by binary fission?

2007-04-11 10:57:48 · 1 answers · asked by notor1ousostrich 1

Where does the energy go?

2007-04-11 10:40:48 · 4 answers · asked by .::Princess::. 1

Why or Why not?

2007-04-11 10:40:26 · 3 answers · asked by Anonymous

i need an edited version of how moss sexually reproduces. Everything else that I read leaves me confused.

2007-04-11 10:11:44 · 4 answers · asked by mirandapickett 1

Why do athletes have lower resting heart rates and couch potatoes have higher resting hr? a citation would be appreciated

2007-04-11 09:44:08 · 2 answers · asked by Anonymous

2007-04-11 09:40:15 · 5 answers · asked by Habiba 1

2007-04-11 09:34:53 · 6 answers · asked by Habiba 1

2007-04-11 09:31:24 · 8 answers · asked by Habiba 1

As best we know...I have heard their are more alive today than all total deceased,since mankind.

2007-04-11 09:25:33 · 3 answers · asked by cal 1

2007-04-11 09:24:21 · 11 answers · asked by Habiba 1

perhaps via a virus or stem cell therapy. also to be specific, when i say alter i mean not only manipulate preexisting genes (turning them on or off), but adding or subtracting new genes. (also permenant, not temporary)

2007-04-11 09:18:35 · 1 answers · asked by Anonymous

2007-04-11 08:57:36 · 3 answers · asked by westafrocherokee 1

2007-04-11 08:40:40 · 2 answers · asked by thanh l 1

is stored within ATP, doesn't this mean that ATP contains more energy than ADP contains. If yes, then doesn't the body in fact have to spend energy to form a molecule of ATP. And hence doesn't the body waste energy forming ATP? How much energy must the body spend to form a molecule of ATP. I suppose if the amount of energy necessary to form a molecule of ATP is small, then it is a minor price to pay for the convenience of effective energy storage.

I guess in a nutshell my question is . . .does the body have to exert energy to form a molecule of ATP? If so, must the body spend a significant amount to do so?

2007-04-11 08:15:55 · 5 answers · asked by kmm4864990 1

4. Compare and contrast the roles of plants and animals int he flow of energy in the living world. Give an example of a food chain

2007-04-11 07:40:37 · 1 answers · asked by cherryvalley2006 2

I'm thinking paternity rest ? Is it possiable ? a guy at work is going through this situation and ask me this question , I told him I was unsure , but if he had any doubs to ask for a paternity test , I kinda think it's not possiable but I didnt want to tell him that ...My husband has dark brown eyes and I have blue eyes and our child has green eyes , It seems like the brown try to dominate ...any feedback would be apperciated..The baby is around 7 months old so it is very easy to tell the eyes are light , crystal blue , I know in newborns it is very hard to determin the eye color

2007-04-11 06:44:46 · 8 answers · asked by Anonymous

2007-04-11 02:59:32 · 3 answers · asked by Peshwari 2

2007-04-11 02:34:01 · 21 answers · asked by andy j 1

whata kind of creatures would have existed inbetween monkey and human transformation, monkeys still exist, why all monkeys didn't evolute like humans, some were retained as monkeys...other turned into humans.

2007-04-10 23:28:40 · 13 answers · asked by Anonymous

i had read the JAGDISH CHANDRA BOSE, the scientist who first discovered that plants were living..also found that metal pieces do have some sort of feeling though inferior to plants......

2007-04-10 20:17:32 · 3 answers · asked by newt 1

Some species of lungfish breathe only air; they have no gills, and will drown if forced underwater. Why might it be an advantage for lungfish to breathe air even though they live in water?

2007-04-10 18:58:13 · 5 answers · asked by confidential 2

2007-04-10 18:52:03 · 5 answers · asked by Anonymous

2007-04-10 18:33:35 · 11 answers · asked by Anonymous

1. Basking sharks swim close to the surface of the water and appear to be sunning themselves like lizards. In fact, however, they are feeding on plakton. Why might a land-dwelling creature like a lizard need to sun itself, while a water-dwelling creature like a shark does not?

2007-04-10 18:32:11 · 4 answers · asked by confidential 2

Im doing a college biology project where we have to come up with our own experiments. I've looked everywhere and can't find the answer, and poison control couldn't help me. I want to know how much ammonia is lethal if ingested, how much ammonia would it take to change a pH of 2 to a base pH.

2007-04-10 17:22:47 · 2 answers · asked by ashley_stromberg21 1