Biology - June 2007

why is the colour of humans living near equator is dark for example the people who live in african countries but as we go away from the equator it starts to get fairer and fairer and fairer please explain

2007-06-23 07:17:12 · 15 answers · asked by 007dragoon 1

Describe how the products of photosynthesis are carried from the leaves of a plant to an underground storage organ.

2007-06-23 06:25:13 · 2 answers · asked by Stormy Knight 1

2007-06-23 06:09:21 · 12 answers · asked by fbl 1

is reproduction among humans possible at any time or it works only in specific periods? and at which age is it possible?

2007-06-23 03:35:09 · 12 answers · asked by Anonymous

It is "recorded" in Genesis that a man's life span was once hundreds of years. Given the current life expectancies and what we know about cardiac and nerve cells not being able to replicate themselves, is it logical to take these genealogies literally.

2007-06-23 02:47:19 · 14 answers · asked by Troy B 4

What do you know about it?
Is there any evidence about it?

2007-06-23 02:18:29 · 11 answers · asked by neo 1

2007-06-23 01:33:23 · 15 answers · asked by archa 1

2007-06-22 22:48:21 · 5 answers · asked by Anonymous

Evolutionists say that a newly formed river or stretch of water can separate people, causing them, over vast periods of time, to speciate (or evolve into another species). How, then, if water was such a barrier, did humans manage to spread out over the entire planet, crossing massive seas etc?

2007-06-22 21:03:01 · 14 answers · asked by Anonymous

2007-06-22 20:23:57 · 10 answers · asked by carnival queen 5

Please check this
http://www.npr.org/templates/story/story.php?storyId=4225769&sc=emaf
http://www.learner.org/channel/courses/biology/textbook/gender/gender_4.html
I read that size of Y chromosome has reduced because it did not have partner at all. but X chromosome has not reduced, they say that it is because, it has partner in female sex to recombine.
If Chromosome don't get partner to recombine than there is tendency to delete genes which may be harmful produced by mutation. which intern will reduce the size of chromosome is the logic.
Now if X chromosome gets only 50% chances to recombine then I think size of X chromosome should also reduce to a size in between Y and its initial size in reptiles This is my guess. Please comment.

2007-06-22 19:50:16 · 2 answers · asked by Dr Umesh Bilagi 2

2007-06-22 18:56:18 · 5 answers · asked by viswamvishnu 3

Most sex-linked characteristics are carried on the _____________________.

2007-06-22 15:28:30 · 9 answers · asked by Shawn 1

Crosses between certain white-flowered and red-flowered plants result in pink-flowered offspring. What type of inheritance is this?

2007-06-22 15:25:46 · 8 answers · asked by Shawn 1

When we talk of simple cells or proteins or amino acids as the earliest building blocks of life, is it understood that they all had a source of food or is food unnecessary for these to exist?

How long, if they do require nourishment, could they survive in what might be thought of as a hostile environment?

Please help a non-scientist in his quest to understand evolution.
Thanks

2007-06-22 15:03:35 · 8 answers · asked by kazmania_13 3

2007-06-22 11:25:17 · 6 answers · asked by Anonymous

My brother might be fathering a child in a month.. and what does he need to do after the baby is born? and how long will it take for results?

2007-06-22 10:20:12 · 3 answers · asked by Anonymous

2007-06-22 10:13:16 · 3 answers · asked by gandalf_for_president_3rd_age 3

2007-06-22 09:45:39 · 11 answers · asked by Gorgan M 2

Am not sure if this is accurate but..A steak dinner can take you two, maybe three days to get out of your intestine. What that means is the way you digest it is basically to rot it in your intestines. On the other hand, if you eat vegetables and fruits, they're out of your system in less than 12 hours.

2007-06-22 09:09:15 · 6 answers · asked by titti 2

Crossing over occurs frequently,
They assort independently.
They are in the same linkage group
They are segregated during meiosis
An inversion will usually occur.

2007-06-22 08:19:57 · 2 answers · asked by Shawn 2

Acquired characters
variations
weakest members
noncompetitiors
similarities

2007-06-22 07:33:30 · 7 answers · asked by Thomas A 1

located on chromosomes
inherited in the same way as chromosomes
arranged in linear sequence of chromosomes
assorted independently during meiosis
all of these

2007-06-22 07:26:53 · 3 answers · asked by Thomas A 1

The least of taxonomic categories listed here are:
a. family
b. phylum
c. class.
d. order
e. genus

And can you explain why? Thanks.

2007-06-22 06:09:33 · 2 answers · asked by **** 2

I don't hear much discussion over it, and that surprises me.

2007-06-22 05:51:16 · 11 answers · asked by Anonymous

2007-06-22 05:11:09 · 4 answers · asked by Anonymous

Because our ability to retaine scents is based upon how many particles are attched to our nose hairs for a particular odour would the pigmentation of those hairs affect our sense of smell at all!?

2007-06-22 04:39:36 · 4 answers · asked by Anonymous

http://uk.news.yahoo.com/rtrs/20070620/tsc-uk-bush-stemcells-donors-011ccfa.html

2007-06-22 04:37:17 · 8 answers · asked by Anonymous

2007-06-22 04:17:12 · 8 answers · asked by renhoez 5

2007-06-22 04:16:50 · 10 answers · asked by j9819441646 t 1