Biology - March 2007

water is important for so many reasons what is the real importance of it?

2007-03-16 11:15:09 · 3 answers · asked by unstoppable! 1

Autosomal dna is received 50-50 from both parents. From what I see on the genealogy websites is that the testing will only help you with your ethnicity, not help you find specific ancestors like the Y and mitochondrial DNA. Does anyone know a website that will test Autosomal dna more specifically that might tie you into ancestors?
My great grandfather died when my grandfather was a very small boy. My grandfather was his only child. Now my grandfather had 5 sons all deceased Those 5 sons had a tendency to have daughters. Actually, my grandfather has 2 grandsons, one I never hear from at all and the other really hasn't responded to my request. I don't like to press something like this as people sometimes feel for their DNA to be checked is an intrusion.
I don't need my mitochondrial DNA as my direct maternal line is well researched by many people.
I know my father had mitochondrial DNA from my grandmother, but he doesn't pass it on to his children.

2007-03-16 11:11:35 · 4 answers · asked by Shirley T 7

2007-03-16 11:09:38 · 1 answers · asked by onihomahan 1

2007-03-16 11:07:25 · 0 answers · asked by jerry m 1

I am doing a biology study and am not sure which statistical test to use to test for significance. I have collected data on tree ages and the number of fungal fruiting bodies which appear on them. I am trying to see if there is a correlation between age and the number of fruiting bodies i.e. the older the tree the more fungus. I think I should be using the t-test but am not sure any help appreciated -thanks

2007-03-16 11:05:35 · 4 answers · asked by louise faz 1

a. maintain homeostasis
b. respond to stimuli
c. adapt to their environment
d.reproduce
e. evolve

2007-03-16 10:37:53 · 4 answers · asked by Anonymous

We assume this part was preserved in a cool place (like a refrigerator) before it was used.

2007-03-16 10:25:24 · 8 answers · asked by Roy Nicolas 5

A. T lymphocytes act by ingesting foreign substances.
B. Once a lymphocyte enters the lymphoid tissue, it resides there permanently.
C. Lymphoid macrophages secrete antibodies into the blood.
D. Lymphoid tissue is predominantly reticular connective tissue

2007-03-16 09:57:02 · 4 answers · asked by Anonymous

A. Its concentration in the blood is decreased by hyperventilation.
B. Its accumulation in the blood is associated with a decrease in pH.
C. CO2 concentration are greater in venous blood than arterial blood.
D. More CO2 dissolves in the blood plasma plasma than is carried by the RBCs.

2007-03-16 09:42:54 · 6 answers · asked by Anonymous

2007-03-16 09:42:43 · 8 answers · asked by jjonesnow 1

A. Rising blood pressure
B. Arterial pH resulting from CO2 retention
C. Rising Carbon Dioxide Levels
D. Arterial PO2 below 60 mm Hg

2007-03-16 09:35:37 · 4 answers · asked by Anonymous

I was told that the Bible is not made to be historically accurate, but spiritually accurate. If this is true, then humans really did evolve from apes. So that made me wonder, will other animals evolve into more intelligent species? Like civilized dogs, cows, or llamas. What would the world come to then? Would animals have jobs and income, pay taxes, live in houses, and drive cars? Also, would there be new species formed, like if a human person married a human dog? (I know that's really gross to think of, but if they're both human, then who knows what could happen?) Another question is, do you think that humans may also evolve into creatures of different sizes or shapes?

2007-03-16 09:27:40 · 7 answers · asked by Anonymous

1. Why do plants and animals that live in the water have a simpler reproductive process than the plants and animals that live on land?

2. Why are many kinds of fish very easily produced in fish hatcheries?

3. Why are egg cells in birds relatively few in number and large in size?

4. Describe the migrations made by salmon and eels for purposes of reproduction.

5. Describe the life history and reproduction of the common toad.

6. Why are hens' eggs very satisfactory for the study of embryology?

7. In what bilaterally symmetrical animals is there only one ovary?

8. Is fertilization necessary in the production of eggs?

9. Describe the development of the rabbit embryo from fertilization to birth.

10. Compare the differences in parental care in the case of fish, birds, and mammals.

2007-03-16 09:12:25 · 5 answers · asked by kissesfromhvn807 2

You are required to make up 200ml of cell growth media containing penicillin.
Concentration of supplied penicillin: 100mM
Final concentration required in media: 10 microM

What is the volume of penicillin needed?

Im a bit confused, do i need to use this formula?

Conc 1 x Vol 1 = Conc 2 x Vol 2

2007-03-16 08:58:06 · 2 answers · asked by buki_girl 1

? so many questions yet, no answers.or is there?

2007-03-16 08:13:15 · 7 answers · asked by Anonymous

why is this so?

2007-03-16 07:47:19 · 5 answers · asked by Anonymous

im doing a lab report and it says to describe the experimental group and control group, my lab report is over bacteria & disinfectants lab.....help!!!

2007-03-16 07:45:10 · 7 answers · asked by blondie14 1

2007-03-16 07:39:29 · 2 answers · asked by Anonymous

2007-03-16 07:38:10 · 4 answers · asked by Anonymous

2007-03-16 07:20:11 · 3 answers · asked by Anonymous

2007-03-16 07:18:40 · 4 answers · asked by Anonymous

a. possesses membrane-bound organelles.
b. lacks DNA
c. lacks a nuclear evelope.
d. is usually considerably larger.
e. is structurally more complex.

2007-03-16 07:16:00 · 5 answers · asked by Anonymous

Why won't a single cell ever grow large enough to devour New York City? There may be more than one correct answer.

A. The larger the cell, the lower the ratio of surface area to volume.
B. The amount of cell membrane around the cell is too large to support the volume of the cell.
C. The volume inside the cell is too large to be supported by the amount of cell membrane around the cell.
D. The larger the cell, the higher the ratio of surface area to volume.
E. The exchange of gases, water, and other molecules through the cell membrane will not occur fast enough to support such a large cell.



I have no idea : | Please HELP!!!

2007-03-16 07:03:43 · 11 answers · asked by Kendra 2

a, numerous adaptions
b. reproductive success
c. biodiversity
d. rate of environmental change

2007-03-16 06:56:54 · 4 answers · asked by Anonymous

a. Everthing is allowed to vary between treatments.
b. The treatments differ in only one way.
c. All the experimental subjexcts are the same.
d. Only one experimental treatment is used.

2007-03-16 06:53:25 · 2 answers · asked by Anonymous

having a black baby I read that this sometimes happens

2007-03-16 06:49:35 · 5 answers · asked by hanna 1

It's for a school project. How do doctors use biology?

2007-03-16 06:40:04 · 6 answers · asked by pshhhbiteme 1

a. There is no reasonable alternative to their hypothesis.
b. Another person would record the same results.
c. Only natural causes are involved.
d. The same thing would happen at other places and times.
e. All of the above are assumed.

2007-03-16 06:04:48 · 10 answers · asked by Tony 1

What is The significance of mitosis cell dvivision and meiosis cell division?

2007-03-16 05:45:05 · 4 answers · asked by Anonymous

A. There is no reasonable alternative to their hypothesis.
B. Another person would record the same results.
C. Only natural causes are involved.
D. The same thing would happen at other places and times.
E. All of the above are assumed?

2007-03-16 05:42:24 · 8 answers · asked by Tony 1