Biology - July 2007

2007-07-25 02:18:54 · 4 answers · asked by Motunrayo A 1

How does a paramecium move from one place to another?

A. It attaches to the surface of a mobile aquatic organism.
B. It uses its cilia.
C. It whips its flagellum like a tail.
D. It creeps along a surface, similar to an amoeba.

2007-07-25 01:43:07 · 6 answers · asked by ♥Anonymous♥ 2

Where might you find protists?

A. In the soil
B. Inside your intestines
C. In the ocean
D. All of the above

2007-07-25 01:36:22 · 4 answers · asked by ♥Anonymous♥ 2

How does bacterial decomposition benefit the biosphere?

A. It provides a steady source of oxygen that aerobic organisms need to breathe.
B. It enables plants to use nitrogen from the soil
C. It helps reduce the size of the ozone hole.
D. It returns carbon from once-living organisms to the atmosphere in the form of CO2.

2007-07-25 01:17:43 · 2 answers · asked by ♥Anonymous♥ 2

Is it something in their genes, like a nutrient or protien that makes this possible?

I have not a clue and I'm curious.

2007-07-25 01:17:31 · 2 answers · asked by Anonymous

2007-07-24 22:57:11 · 2 answers · asked by happytramp 4

test how you can give best information in the least time

afterall time is money

value it & be fast, short &simple

2007-07-24 18:42:48 · 14 answers · asked by Anonymous

i am always asked "which came first the chicken or the egg"but i never know have like scientists found out yet???

2007-07-24 17:43:48 · 34 answers · asked by philisity_scatcat 2

What feature do all chordates share, at least at some point in their development?

A. A tail
B. Lungs
C. Four limbs
D. Vertebrae

2007-07-24 17:01:27 · 6 answers · asked by ♥Anonymous♥ 2

Which statement best characterizes Gram-negative bacteria?

A. They have a thin peptidoglycan layer in their cell wall.
B. They turn purple when treated with Gram stain.
C. They live in extreme environments.
D. They contain a distinct membrane-enclosed nucleus.

2007-07-24 16:50:46 · 3 answers · asked by ♥Anonymous♥ 2

If I grow radish seeds in a germination BAG, (which is basically a plastic bag) is light a major factor in the seed's growth? (there will be 10 seeds in 5 bags each representing a different level of the independent variable, I chose light) The reason I am asking this is because in the teacher 's directions, it says hang the bag on a cabinet door or in another location if the ind. variable requires it. I was going to put the control as the reg. day/ night cycle, one in comple darkness for 10 days, one bag of seeds which gets 1 hr. of sunlight a day, another for 2, etc.. Does this sound ok? And can light be my independent variable if they are grown in bags? If this is not a good idea, what can my independent variable be?

2007-07-24 16:46:23 · 5 answers · asked by Anonymous

Which of these factors plays the most significant role in natural selection during times of food scarcity?

A. Behavioral isolation
B. Genetic drift
C. Competition
D. Reproductive isolation

2007-07-24 16:46:13 · 5 answers · asked by ♥Anonymous♥ 2

Explain why certain species of animals are used as marker for determining the oxygen levels of lakes?
Explain why certain species of animals are used as marker for determining the oxygen levels of lakes?
Explain why certain species of animals are used as marker for determining the oxygen levels of lakes (example, many leeches are found along bottoms of lakes with low levels of oxygen)
please provide reasons

2007-07-24 16:12:53 · 2 answers · asked by Anonymous

2007-07-24 15:50:57 · 10 answers · asked by suyin_12 1

2007-07-24 15:40:38 · 4 answers · asked by Eric C 2

If somehow we were able to detect the soul leaving the body at death, then at what point would we be able to detect a soul entering a fetus while it‘s in the womb? Would that point be characterized as the “beginning” of life?

2007-07-24 15:33:52 · 8 answers · asked by Prince Auggie 2

2007-07-24 14:01:05 · 6 answers · asked by PrettyinPink 2

2007-07-24 14:00:29 · 4 answers · asked by brandilynn222 1

2007-07-24 13:59:00 · 3 answers · asked by Zack 4

2007-07-24 13:40:05 · 4 answers · asked by Anonymous

If possible i;d like to hear both sides of the arguement.

2007-07-24 13:00:29 · 5 answers · asked by Salivating Fish 3

2007-07-24 12:55:55 · 5 answers · asked by Anonymous

A population has 3 genotypes distributed as follows:
FF200, Ff0, ff800. What would be the Hardy-Weinberg equilibrium genotype frequencies in this population? Show values for p and q?
someone show me how to do this but each was different, which one is really right?
F2+Ff+f2
400/2000 =.2 F
1600/2000=.8F
.2^2= .04FF
2 x .2 x .8= .32 Ff
.8^2= .64 ff
------------------------------... or this one?
p2+ 2pq+q2=1
p+q=1
200+800 = 1000
200/1000= .20 (p2)
800/1000= .80 (q2)
2pq= 0
p= .44 (root of .2)
q=.89 ( root of .8)

2007-07-24 12:25:17 · 4 answers · asked by Kelly 1

Both allels are contributed by the female parent.
A. TRUE
B.FALSE

2007-07-24 09:58:06 · 7 answers · asked by eeyore_girly17 1

Which law applies only for genes located on different pairs of chromosomes of far apart on the same chromosome pair?
A. the law of segreation
B. law of independent assortment
C.law of seperation

2007-07-24 09:46:42 · 3 answers · asked by eeyore_girly17 1

What environmental factors or events might lead to geographic isolation of a population?

A. Creation of a desert out of what was once fertile grassland, during a long period of drought
B. An earthquake creates a new mountain range
C. Formation of an island during a very warm period where the ocean level rises dramatically
D. All of the above

2007-07-24 09:41:49 · 3 answers · asked by Anonymous

I am now 32 and when I was in 7th grade (1987-88), I was taught both the theory of evolution and the theory of creation. At the time, I did not think that there was anything significant about the teaching of both of these ideas, but now I realize that it may have been unusual. So I am curious whether this happened to many others. If you were taught both evolution and creationism, please tell me what year it was (guess if you can't be 100% sure) and what city and state. By way of explanation, I am fascinated by the "fight" between evolution and creationism. Thanks.

2007-07-24 09:40:49 · 12 answers · asked by Unorthodox 3

This is an article called 'Butterfly shows evolution at work' very interesting and I just want to see what people think about it. http://news.bbc.co.uk/2/hi/science/nature/6896753.stm

2007-07-24 09:19:32 · 3 answers · asked by Anonymous

2007-07-24 05:14:38 · 10 answers · asked by momtoboys 2

2007-07-24 05:11:22 · 3 answers · asked by momtoboys 2