Biology (Science & Mathematics) - June 2007

When theists talk about "macroevolution" they will say that it has never been observed, which is true. We have never seen family to family evolution in action except mostly in the interpretation of the fossil record.

But in criminal trials we normally do not see the defendant committing the crime. So why do we use a lower standard for something with way bigger consequences? People can be killed and imprisoned for life for something that we never actually saw them do, we of course use evidence that was left behind that shows that the person or event happened.

So why do we use the "I never saw it standard" when it comes to science if the overwhelming evidence shows that something happened even when we didn't see it for ourselves? Why do we not use the "I need to see it" for criminal trials?

Another example is continental drift. If before we could measure continental drift would we be right in saying that it is real based on the ample climatological and paleontological evidence?

2007-06-05 11:11:44 · 3 answers · asked by Anonymous

0 ⤊

What are the three basic structures found in most cells?

2007-06-05 11:03:14 · 4 answers · asked by Bee 2

0 ⤊

A result of global warming might be a rise in sea level.?

True/False

2007-06-05 10:25:30 · 10 answers · asked by Anonymous

0 ⤊

Conservation goals must be weighed against economic costs.?

True/False

2007-06-05 10:25:03 · 4 answers · asked by Anonymous

0 ⤊

Biodiversity is important to humankind because we are part of it and dependent on it for our own survival.?

true/false

2007-06-05 10:24:47 · 2 answers · asked by Anonymous

0 ⤊

What environmental factor would cause an increase in the rate of genetic change?

2007-06-05 10:24:32 · 2 answers · asked by Razzledazzle010 2

1 ⤊

DDT was used to?

a. fertilize soil. c. form ozone.
b. kill insects. d. feed animals.

2007-06-05 10:19:53 · 5 answers · asked by Anonymous

2 ⤊

Lichens!!!?

im confused

a. are parasites in the digestive systems of mammals.
b. are bacteria that survive in extremely hot water.
c. have a three-chambered heart and a closed circulatory system.
d. are symbiotic combinations of algae and fungus.

2007-06-05 09:22:49 · 7 answers · asked by BOL3N$ HOODPiiNC3$$ 1

0 ⤊

Help with some biology questions?

I was going through past biology papers and came across a few questions i found difficult. I'd appreciate any help...
1)Suggest why treating diabetics with insulin made by genetically engineered bacteria may be better than with insulin made by pigs/cattle.
2) How do decomposers break down carbon-containing compounds from dead remains of plants?
3) Why isn't starch digested in the stomach?

2007-06-05 09:07:39 · 2 answers · asked by Razzledazzle010 2

1 ⤊

Biology Help PLease?

1. The human immune system uses a variety of means to defend the body from pathogens. Which elements are parts of the human immune system?
A.skin, neurons, muscle cells, and pancreas
B.white blood cells and red blood cells
C.skin, lymph nodes, white blood cells, and spleen
D.mucous, urine, and kidneys

2.Which consequence occurred when sea otters were overhunted along the Pacific Coast?
A.The kelp grew rapidly and created new habitat for fish.
B.The sea urchin population was reduced to dangerous levels.
C.The sea otters on the Pacific Coast went extinct.
D.The sea urchin population expanded and consumed the kelp and damaged the habitat.

2007-06-05 08:48:35 · 3 answers · asked by isummerlover 1

3 ⤊

What cells of the immune system does the AIDS virus attack and why is this so significant?

2007-06-05 08:45:47 · 7 answers · asked by Anonymous

0 ⤊

Do identical twins have more likely probabilities of experiencing / incidentsof having the same thoughts???

... as opposed to single individuals (no twins)?

What about paternal twins?

2007-06-05 07:51:23 · 3 answers · asked by Anonymous

2 ⤊

My 6 year old son would like to ask a question. "why are my hamsters teeth yellow but mine are white?"

My question - what is the evolutionary reasoning behind this

2007-06-05 07:40:58 · 15 answers · asked by Anonymous

3 ⤊

DNA helP!!!?

DNA is made up of two separate strands of base sequences. The same sequence is found on both strands, but running in opposite directions. What word describes this characteristic?

2007-06-05 07:32:57 · 9 answers · asked by ButtErFlY 3

0 ⤊

what happens if you eat your own feces? Does the following excrement cease to be? I shall not try this.?

2007-06-05 07:01:26 · 3 answers · asked by vain_guerilla 3

1 ⤊

four major tissue types?

2007-06-05 06:32:41 · 3 answers · asked by superstar80 1

0 ⤊

Help With Biology QUestion PLEASE?

1.When a human embryo is developing, the embryo produces a special type of hemoglobin not found in infant, child, or adult blood. Which statement best explains how an embryo can produce a different type of hemoglobin from that of an infant, child, or adult?
A.Humans have genes for different types of hemoglobin, and they are expressed at different times.
B.An embryo and an adult have different genes for hemoglobin.
C.As the embryo develops and cells differentiate, certain genes are lost.
D.Human genes change slowly as a person ages.

2.Which situation would most likely result in evolution?
A.A green parrot has an allele for green feathers and an allele for blue feathers.
B.A butterfly predator sees yellow more easily than it does green, and a population of butterflies includes both phenotypes.
C.A large population continues to grow larger.
D.A single individual dies in a large population.

2007-06-05 05:49:40 · 4 answers · asked by isummerlover 1

0 ⤊

DNA gel electrophoresis?

The primary reason that DNA gel electrophoresis is usually undertaken using an agarose gel and not an acrylamide based gel as in protein electrophoresis is:
(a) DNA is always negatively charged while proteins are not
(b) that using an agarose gel makes it easy to distinguish DNA from proteins
(c) that higher voltage must be used for DNA electrophoresis
(d) that detection and visualization of DNA bands is easier on agarose based gels
(e) due to the larger size of DNA compared to proteins

which is the correct answer. i need them for my exam,plx

2007-06-05 05:49:38 · 4 answers · asked by jackycheongiohong 1

0 ⤊