Biology - March 2007

the name of this 'thing' that shares both fauna and flora chacateristics?

2007-03-09 15:07:48 · 6 answers · asked by Charles V 4

2007-03-09 15:01:19 · 2 answers · asked by tiffany a 1

Father is B+ and Mother is O+. One child is B+ and the other is O+. Is this possible?

2007-03-09 14:47:10 · 14 answers · asked by notyourbiz 1

1. . Imagine you are a scientist trying to determine the evolutionary relationship between 2 different groups of snakes. The first group of snakes lives in North America, the second lives in Africs. The 2 groups are very structurally similar, although North American snakes are brown and white and the African snakes are green. The two groups of snakes have nearly identical chromosome structures. Do you think these 2 groups of snakes share a common ancestor? Why or why not?

2. Would you classify the 2 groups of snakes as the same species? Why or why not?

2007-03-09 14:40:50 · 4 answers · asked by confidential 2

2007-03-09 14:39:05 · 21 answers · asked by Anonymous

2007-03-09 14:23:34 · 11 answers · asked by Anonymous

I've noticed that the knuckles of some people's hands pop out (the majority I believe), whereas with others they go "down" to create little hollowed-out holes where their knuckles are. What causes this?

2007-03-09 13:26:24 · 2 answers · asked by Anonymous

is it possible to have identicle male twins and identicle female twins, and if one male mates with one girl, and the other male mates with the other girl...will the two couples children have identicle genotypes? i know it has to do something along the lines of the laws of heredity and the pricipals of genetic variation.

2007-03-09 12:58:43 · 5 answers · asked by Anonymous

Or just give me the examples please.

2007-03-09 12:43:02 · 4 answers · asked by joyce o 1

1) List three main differences between DNA and RNA

2) Compare conservative, semiconservative, and dispersive modes of DNA replication.

3) Several temperature -sensitive mutant strains of E. coli display various characteristics. predict what enzymes or function is being affected by each mutation.
a) Newly synthesized DNA contains many mismatched base pairs.
b) Okazaki fragments accumulate, and DNA synthesis is never completed.
c) No initiation occurs.
d) Synthesis is very slow.
e) supercoiled strands are found to remain following replication , which is never completed.

4) define and indicate the significance of a) Okazaki fragments, DNA ligase and Primer RNA during DNA replication.

2007-03-09 12:38:35 · 3 answers · asked by Lilac 2

Hi all
Why do mens r having nipples on there chest
& Why do WOMENS chest called BREAST

2007-03-09 12:03:18 · 5 answers · asked by Anonymous

why makes us human.? Are we predictable? can our behavoiur change? can the leoprad change its spots..
is is human possible that its enviromental in how we change or is it genetic. what is there to change and can we adapt

2007-03-09 11:28:12 · 6 answers · asked by Elvis 109 3

2007-03-09 11:22:46 · 5 answers · asked by zaggittier 4

...why is the coronary artery (which brings oxygenated blood to the heart) called an artery?

2007-03-09 11:00:26 · 9 answers · asked by IamBatman 4

2007-03-09 10:51:01 · 3 answers · asked by Anonymous

Why must a person floating on the surface of the water and breathing through a snorkel increase tidal volume and/or breathing rate to maintain normal alveolar ventilation?
a. The lumen of the snorkel introduces additional dead space, adding to the residual volume of the airways.
b. Breathing through the mouth introduces more airway resistance than breathing through the nostrils.
c. Breathing through a snorkel decreases the total resistance of the airways to air flow.
d. Water pressure compresses the chest cavity, making breathing more difficult.

I think it is d. Please help.

2007-03-09 10:46:18 · 3 answers · asked by Anonymous

In which one of the following situations would you expect hemoglobin to have the lowest binding affinity for oxygen?
a. just below the surface of the skin on a cold day
b. in actively exercising skeletal muscle
c. in resting skeletal muscle
d. in the lung

I think it is c

2007-03-09 10:45:17 · 4 answers · asked by Anonymous

A human red blood cell in the artery supplying the jejunum is on its way to deliver oxygen to the jejunum. From this point in the artery, how many capillary beds must this red blood cell pass through before it returns to the left ventricle of the heart?
a. One
b. Two
c. Three
d. Four
e. Five

I have no idea on this one. Please help.

2007-03-09 10:44:28 · 2 answers · asked by Anonymous

Which one of the following statements is false?
a. Near arterioles, the blood pressure that forces fluid out of capillaries exceeds the osmotic pressure that drives fluid into capillaries.
b. Smooth muscle cells in the walls of arterioles control the flow of blood into capillaries.
c. The fluid that leaks from capillaries returns to the heart in the right atrium.
d. Blood flows faster through capillaries than it does through veins.
e. Blood pressure is lower in veins than in capillaries.

I think it is b, but I'm not 100% sure

2007-03-09 10:43:41 · 1 answers · asked by Anonymous

Michael Behe says, ". . . the fundamental mechanisms of life cannot be ascribed to natural selection, and therefore were designed."

Couldn't the opposite be asserted just as easily? "The fundamental mechanisms of life cannot be ascribed to design, and therefore were naturally selected?" Why must evolution be held up to severe logical scrutiny, while the alternative -- a designer and creator -- is not?

If ID is to compete as a scientific explanation for life's origins, shouldn't it be required to justify the mechanism of the Creator's power? How exactly does a being design and create life? What chemical & physical steps are involved? Why aren't those valid scientific objections?

I don't agree that there are any truly "irreducibly complex" phenomena in nature, but if there were, I would argue that a designer could no more be postulated without evidence than a series of successive variations could be.

Proponents of Intelligent Design, how do you respond to that?

2007-03-09 10:09:27 · 4 answers · asked by Ben H 4

2007-03-09 10:07:40 · 6 answers · asked by BROCK 1

On an evoulutionary point of view what function do the wings of chickens have if they cannot fly?

2007-03-09 09:55:51 · 12 answers · asked by mallan 1

2007-03-09 09:53:45 · 7 answers · asked by Anonymous

Like food cloning, or human cloning or things like that.

2007-03-09 09:44:14 · 1 answers · asked by Anonymous

takes places on ribosomes, occurs only in eukaryotic cells, can only produce messenger RNA molecules, or builds an RNA strand in the 5' to 3' direction.

2007-03-09 09:43:46 · 1 answers · asked by whatsinaname07 1

please help !!

2007-03-09 09:42:16 · 5 answers · asked by zahara 1

2007-03-09 09:40:43 · 3 answers · asked by zahara 1

2007-03-09 09:37:20 · 9 answers · asked by volleyballchikk02 1

Who is responsible for antibiotic resistance? Why?

2007-03-09 09:32:32 · 8 answers · asked by shane200388 1

What substance does your body produce to block the pain caused by eating chili peppers?

2007-03-09 09:31:52 · 1 answers · asked by shane200388 1