Biology - May 2007

Among the species that produce by the process of mating (sexual intercourse between a male and female) my question is on the starting point. How the first male or female or both were born? If it was without mating why the process is required for all subsequent reproductions?

2007-05-14 22:58:25 · 7 answers · asked by sasha 1

Because of farming and medicine etc, there is pretty much no natural selection because any person can live in the world at the moment despite their traits. That is first world countries...

But if the world becomes really screwed up int eh future (predicted to hit 10 billion ppl) and there aint much food, will being tall become a negative trait due to the cost of feeding one's self?

I do evolution at uni, and currently it is obvious that taller is better but that can't keep happening without implictions eventually arising that will select for shorter height.

2007-05-14 22:28:47 · 6 answers · asked by Anonymous

2007-05-14 21:39:07 · 11 answers · asked by mark v 1

I'm doing an Assignment for Uni and I was wondering if you had either earlobes attached to face (no gap) or Earlobes with a gap?
And whether your second toe was Longer than your first toe or your first toe Longer than your second toe?

2007-05-14 21:15:01 · 13 answers · asked by cpu_droideka 1

2007-05-14 20:29:36 · 3 answers · asked by karlljoy 1

+Any recipe will help .
Have a nice day .

2007-05-14 20:05:00 · 6 answers · asked by Anonymous

2007-05-14 18:11:18 · 3 answers · asked by punk rock princess 1

A. Jointed fins
B. Endoskeleton
C. Scales
D. Jaws
E. Gill pouches

2007-05-14 18:01:51 · 4 answers · asked by punk rock princess 1

How do they work?...and stuff?..I googled it, but couldn't find the hisory of it etc. Enzymes?...is that part of the puzzle?..thanks.

2007-05-14 17:41:05 · 4 answers · asked by Cherryberry 1

By the way I'm taking medicine/doctor for my career.thanks

2007-05-14 16:23:33 · 12 answers · asked by E.S ZEBULUN 2

Can someone please give me ideas on materials to use for my science project? I have to make a 3D model of a cell (animal or plant) Very simple. I need materials - practical ones. Please help!

2007-05-14 15:40:21 · 5 answers · asked by me 2

2007-05-14 15:24:05 · 3 answers · asked by chiloypunx 1

_____23. Which provides protection against malaria in the heterozygote?

a) Duchenne muscular dystrophy
b) hemophilia
c) sickle-cell disease
d) male pattern baldness
e) color blindness

2007-05-14 14:37:24 · 3 answers · asked by made4jessemccartney 1

1. In peas, green pod color (G) is dominant over yellow (g) pod color. What are the expected phenotypic ratio for a cross between a parent heterozygous for green pods (Gg) and a parent with yellow pods (gg)? (1 point)
all green
1 green: 1 yellow
all yellow
3 green: 1 yellow
2. Using the traits in question 1, what is the expected phenotypic ratio for a cross between parents that are Gg and Gg? (1 point)
all green
1 green: 1 yellow
all yellow
3 green: 1 yellow
3. In peas, round seeds (R) is dominant over wrinkled (r) seeds. What are the expected genotypic ratio for a cross between two parents that are heterozygous for round seeds? (1 point)
all Rr
1 Rr: 1rr
1RR: 2Rr: 1rr
3Rr: 1rr
4. Using the genetic information from Question 3 what are the expected phenotypic ratio for a cross between a parent that is homozygous for round seeds and a parent with wrinkled seeds? (1 point)
all round
1 round: 1 wrinkled
all wrinkled
3 round: 1 wrinkled
5. In hamsters brown fur (B) is dominant and white fur is recessive (b). Predict the phenotypic ratio for a cross between a white hamster and a brown hamster if the brown hamster's mother was white. (1 point)
1 brown: 1 white
all brown
all white
3 brown: 1 white
6. In squash, the allele or white fruits (W) is dominant over the allele for yellow fruit (w). If a white-fruited plant is crossed with a yellow-fruited plant and 37 offspring were white and 40 offspring were yellow, what are the genotypes of the parents? (1 point)
WW and Ww
Ww and ww
WW and ww
Ww and Ww
7. Using the traits from question 6, predict the genotypic ratio of the offspring if two heterozygous white squash plants are crossed. (1 point)
1 WW: 1 ww
all Ww
1 WW: 2Ww: 1ww
3 Ww: 1ww
8. You are experimenting with flies in which red eyes (R) are dominant over white eyes (r). If the mother has white eyes and the father is heterozygous, what are the expected results for the phenotype of the offspring? (1 point)
1 red eyes: 1 white eyes
all white eyes
3 red eyes: 1 white eyes
all red eyes
9. In dogs, short hair (S) is dominant over long hair (s). Two short-haired dogs are the parents of a litter of eight puppies. Six puppies have short hair and two have long hair. What are the genotypes of the parents? (1 point)
Ss and SS
SS and ss
Ss and ss
Ss and Ss
10. In Guinea pigs, rough coat (R) is dominant over a smooth coat (r). A guinea pig with a rough coat whose father had a smooth coat mates with a guinea pig having a smooth coat. If they have a total of 8 offspring how many piglets would you expect to have a smooth coat? (1 point)
none of the piglets would have smooth coats
4 of the piglets would have smooth coats
all 8 of the piglets would have smooth coats
2 of the piglets would have smooth coats

2007-05-14 14:18:58 · 7 answers · asked by misscarter 1

2007-05-14 14:17:53 · 3 answers · asked by Der Mann 1

_____13. In a pedigree chart, which is correct?

a) Circles = males; Squares = females
b) A line between a circle and a square represents a mating.
c) A carrier with a normal phenotype is represented by a black circle or square.
d) Offspring are represented by triangles.

2007-05-14 14:08:10 · 2 answers · asked by made4jessemccartney 1

Calculate the Reference front value for a red pigment that migrated 2.5 cm if the solvent front migrated 12.5 cm during the experiment.

2007-05-14 14:02:46 · 1 answers · asked by misscarter 1

I need to make an biological atlas, which consist in four diferent pictures of the different systems in an organism.

The digestive system, circulatory system, respiratory system and finally the urinary system.

Can you help me with a web, where i can find those charts?, it doesn't matter which organism, just not the human being.

2007-05-14 14:01:55 · 1 answers · asked by Nico 2

2007-05-14 14:00:05 · 11 answers · asked by Anonymous

I am refering to times before the modern human existed.

2007-05-14 13:17:26 · 5 answers · asked by richard n 2

Is there a biologist in the house? I'm having trouble finding this, and I need it for a lab report I'm writing. Thanks!

2007-05-14 13:04:52 · 1 answers · asked by sam_we_is 2

This was a discussion in one of my classes. My friend said that the outcome would be gigantic testicles but I don't really believe him.

2007-05-14 12:43:47 · 7 answers · asked by Paul A 2

also, what are the Rh factors of the babies. thank you.

2007-05-14 11:39:02 · 1 answers · asked by what? 7

2007-05-14 11:10:02 · 3 answers · asked by Ines H 1

2007-05-14 11:09:37 · 2 answers · asked by HOME SLICE! 2

Since you can cross different species of animals (ie lions and tigers crossed can create ligers, horses and a donkey crossed create mules) would it be possible to cross a human sperm with a animal egg or vice versa

2007-05-14 10:49:10 · 6 answers · asked by Anonymous

Since sperm is a sugar source could we ferment it and turn it into alcohol?

2007-05-14 10:31:21 · 9 answers · asked by Anonymous

This is the educational mindset that grips all schools today. Its no longer involved in education but instead in indoctrination. Evolutionists are indoctrinating our entire generation in the false belief that there is no God and that we are simply animals evolved from slimy algae.

2007-05-14 04:51:55 · 9 answers · asked by periclesundag 4

1.To identify a biome, which types of information would be most helpful?

A.
predator and prey types

B.
climate, and plant and animal life

C.
longitude

D.
highest latitude measurement

2.Which statement is true about biomes?

A.
Many types of water and land biomes exist on earth.

B.
Biome types only refer to areas on land, not water.

C.
There are many types of land biomes, but only one type of water biome.

D.
Land biomes are more complex than water biomes.

2007-05-14 04:43:46 · 6 answers · asked by Anonymous

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2007-05-14 03:48:52 · 14 answers · asked by Anonymous