Biology - February 2007

2007-02-10 08:10:13 · 6 answers · asked by aDam 1

On what do you base your opinion. Experience in your family?
What you've read in the press? From research on the literature of autism and paternal age?

2007-02-10 08:08:50 · 4 answers · asked by Alex 2

a)Crossing over occurs in meiosis and not mitosis. b) Difference in metaphase of mitosis and metaphase of 1 of meiosis explain why mitosis reserves the ploidy (haploid or diploid) of the cell, while meiosis always produces haploid cells from a diploid cell. c) DNA replicates before mitosis, but not before meiosis 2. d) The total mass of DNA present in all four products of meiosis is the same as the total mass in the two cells produced by mitosis. e) Centomeres divide during mitosis metaphase, but not metaphase 1 of meiosis.

2007-02-10 08:08:47 · 2 answers · asked by Page 1

Xeropthalmia, Aritaminosis. Wilkepedia gives no result. Thanks

2007-02-10 08:04:59 · 2 answers · asked by quinton p 2

if a organism has a diploid number of 72 then how many chromosomes would be present in each daughter cell after mitotic cell division? ow did u figure this out

2007-02-10 08:00:54 · 4 answers · asked by Siminator 2

2007-02-10 07:53:36 · 5 answers · asked by shafali v 1

a) heterochromatin- prophase b) mitosis- heterochromatin c) interphase- euchromatin d) euchromatin- mitosis e) none

2007-02-10 07:52:14 · 2 answers · asked by Page 1

a)a means of producin offsprings b) a means of producing new combinations c) a means of reducing genetic variabilty d) an essential element for evolution

2007-02-10 07:50:02 · 3 answers · asked by Page 1

i have to do this for homework so please tell me

2007-02-10 07:41:16 · 7 answers · asked by mandy 1

a) protozoan- protista b)algae- planta c) parasite-fungi d)bacteria- monera

2007-02-10 07:25:19 · 2 answers · asked by kimzzz 1

a)haploid- haploid b) haploid diploid c) diploid- diploid d)diploid- haploid

2007-02-10 07:16:09 · 5 answers · asked by kimzzz 1

2007-02-10 07:02:02 · 7 answers · asked by Anna H 1

Researchers found that the arginine code AGG is poorly represented in genes of E.coli. Interestingly, they also found that this triplet, when present, binds to the ribosome 7-9 base pairs upstream from the starting ATG triplet (methionine). What does this information suggest in regard to the AGG codon?
A. it is a codon rarely found in this bacterium
B. it is conserved in most prokaroytic organisms
C. it may have a regulatory function in the cell
D. both B and C
E. A, B and C

2007-02-10 06:50:42 · 4 answers · asked by Anonymous

13. A population of 2800 flowers is in Hardy-Weinberg equilibrium, and 2352 of them are red in color. The red allele [R]is the dominant allele; the allele for white color [r] is recessive. What would be the frequency of heterozygotes in the population?
A. .03
B. .16
C. .48
D. .71
E. .84

2007-02-10 06:49:47 · 3 answers · asked by Anonymous

7. If radioactive sulfur (35S) is used in the culture medium of bacteria that harbor bacteriophage viruses, it will later appear in:
A. bacterial RNA
B. bacterial cell walls
C. viral DNA
D. viral RNA
E. viral coats

2007-02-10 06:48:52 · 4 answers · asked by Anonymous

6. Suppose radioactive thymine was added to an actively dividing culture of E.coli bacteria. What would happen if a cell replicated once in the presence of this radioactive base?
A. one of the daughter cells, but not the other, would have radioactive DNA
B. neither of the two daughter cells would be radioactive
C. all four bases of the DNA would be radioactive
D. radioactive thymine would pair with nonradioactive guanine
E. DNA in both daughter cells would be radioactive

2007-02-10 06:48:07 · 2 answers · asked by Anonymous

A. RNA has ribose
B. RNU is always linear
C. RNA has U instead of T
D. RNA is usually single stranded
E. there are many more RNAse enzymes

2007-02-10 06:47:27 · 4 answers · asked by Anonymous

why is the initial number of chromosomes in cells referred to as diploid and 2n, what does the n represent?

2007-02-10 06:30:05 · 6 answers · asked by Siminator 2

a) homologous chromosomes synapse b)btetrad seprate during Anaphase 1 c) chromosomes number is reduced from diploid to haploid d) G1-S-G2 e) none

2007-02-10 06:19:04 · 4 answers · asked by kimzzz 1

a) gametes produces by mitosis b) flowers produced by ogenesis c) pollen produces by microsporogenesis d) zygotes produces by fertilization e)none

2007-02-10 06:15:43 · 5 answers · asked by kimzzz 1

can a human produce a baby with a dog or another kind of animal that is of a different species...just curious

2007-02-10 06:14:54 · 13 answers · asked by kiwi 2

2007-02-10 06:14:27 · 3 answers · asked by swift 1

Exactly! The fossil record shows stasis and stability not the 'preexisting spieces. Have you ever thought that the similarity of the genetic code could be because it is a stable, broad gene pool created by one supernatural artist? Not a unstable, often mutating gene pool that is not supported by the fossil record. Sorry, you are working off the theory of inherited characteristics that was disproved before Darwin's time. Darwin even knew that once a parent inherits a charateristic they cannot pass it on. If the parents pierce their ear, does the baby come out with pierced ears... No they dont. Please, I need solid evidence.

2007-02-10 06:13:29 · 4 answers · asked by Adidas Man 2

when making up agar plates why do you need to ensure that the depth of nutrient agar is the same in all the plates. I need scientific knowledge as to why pls!

2007-02-10 06:06:09 · 1 answers · asked by Anonymous

Like what would happend?

2007-02-10 05:59:59 · 5 answers · asked by Anonymous

thx a lot:)

2007-02-10 05:58:53 · 3 answers · asked by Anonymous

Does anyone have ANY proof that can prove evolution. No peppered moths, or chemical resistant bacteria. Cause that is natural selection. And the study at the University of Michigan doesn't count because that is intelegent design not accidental progession of computers.

2007-02-10 05:47:00 · 12 answers · asked by Adidas Man 2

2007-02-10 05:15:58 · 4 answers · asked by avalentin911 2

http://www.sfusd.edu/schwww/sch697/depts/science/wenning2/datedskulls.htm

What species do F, G, and K belong to? I find that many of the skulls look nearly identical; any tips for identifying them would be appreciated.

2007-02-10 04:52:09 · 1 answers · asked by lirael1019 1

general bio 1,2
inorganic chem 1,
organic chem 1
calculus I, II
Physics with calculus I,II?
something like that or not? Im planning on going to UCLA

2007-02-10 04:45:24 · 1 answers · asked by avalentin911 2