Biology - October 2007

What are they made of, how do they work?

2007-10-31 19:13:31 · 1 answers · asked by Anonymous

provide structural support for the mitochondria

decrease the surface area so substances can’t diffuse in

increase the surface area to allow more space for ATP synthesis

house enzymes needed for digestion

2007-10-31 17:39:25 · 4 answers · asked by xunsunghero 2

cells
tissues
systems
organs

2007-10-31 17:26:16 · 5 answers · asked by xunsunghero 2

Which is more dominant and recessive? Hypothetically, if one parent came from a family of 100% blue eyes, and the other came from a family of 100% green eyes, which is the kid more likely to have?

2007-10-31 17:10:37 · 7 answers · asked by Sara For Life 3

1. In human genetics, the abnormal trait
(a) may be recessive or dominant.
(b) Is always recessive
(c) is always dominant
(d) is always found in the parents, if it's present in the progeny
(e) is never found in the parents, if it's present in the progeny

2. Human albinism is due to the inability to synthesize the dark pigment melanin. Albinism is a recessive trait. These facts suggest that...
(a) two functional alleles are needed to make melanin.
(b) two dominant alleles are needed to make melanin.
(c) only one functional allele is needed to make melanin
(d) two recessive alleles are needed to make melanin.
(e) one recessive and one dominant allele are needed to make melanin

3. A father is heterozygous for the Rh-antigen gene. The mother is homozygous recessive. These parents are concerned that an embryo with Rh+ blood will be attacked by the immune system of the mother. What is the probability that an embryo they conceive will be Rh+?
0.10, 0.20, 0.25, 0.50, or 0.75..

2007-10-31 16:07:09 · 7 answers · asked by Anonymous

Since the human brain is so big - sometimes causing female pelvics to break - wouldn`t natural selection work against humans evolving to have bigger brains?

BTW - I`m an atheist that does not deny that evolution is a fact. This question is merely a gap in my understanding - it is not some creationists attempt to prove the theory wrong.

2007-10-31 12:57:57 · 8 answers · asked by Future 5

2007-10-31 12:52:01 · 3 answers · asked by Terri L 2

2007-10-31 12:11:11 · 5 answers · asked by mary 1

2007-10-31 12:03:18 · 5 answers · asked by Anonymous

(a) in the oviduct
(b) in the ovary
(c) in the uterus
(d) in the vagina

2007-10-31 11:59:01 · 9 answers · asked by Anonymous

(a) the beating of the cilia in the oviduct
(b) the beating of the flagella in the oviduct
(c) the beating of the egg?s cilia
(d) the beating of the egg?s flagella

2007-10-31 11:57:40 · 3 answers · asked by Anonymous

(1) It contains the sperm?s nucleus and is the part of the sperm that enters the egg during fertilization
(2) In contains the sperm?s mitochondria
(3) It fuses with the plasma membrane of the egg cell
(4) It contains enzymes that are released when the sperm encounters an egg and dissolves a hole in the matrix that surrounds the egg

2007-10-31 11:50:31 · 5 answers · asked by tnawee 1

(1) have the gonads of one sex but the external appearance of the other
(2) possess both male and female reproductive systems
(3) develop from unfertilized eggs
(4) usually fertilize themselves

2007-10-31 11:48:52 · 5 answers · asked by tnawee 1

For instance, cloning can lead to the death of the person being experimented is a point. I need like 1 or more points regarding this subject and it needs to be on the No to cloning side b/c i got lots of positive things about cloning? Hope I can be helped :)
PS: Please do NOT make it tooo scientific b/c im only in Junior High school lvl so yea....

2007-10-31 11:47:40 · 5 answers · asked by shaneluchun 2

2007-10-31 11:36:00 · 6 answers · asked by irien 1

Is the alcohol that we drink lipophilic? Namely, does alcohol we consume enter the brain through the blood-brain-barrier because it is lipophilic? Or, does it require a co-transporter of some sort in order to enter the brain and administer its effects?

2007-10-31 11:16:45 · 2 answers · asked by experimental9582 1

how those that organelle work on a analogy as a restaurant.
help please

2007-10-31 11:06:09 · 2 answers · asked by Domingo/Janet 1

HELP ME PLEASE!

2007-10-31 11:02:19 · 3 answers · asked by Anonymous

I'm stuck on this genetics problem. I have the answers, but I need to know how to figure out each question. The question is:

In sesame plants, the one-pod conidition (P) is dominant to the three-pod condition (p), and a normal leaf (L) is dominant to wrinkled leaf (l). Pod type and leaf type are inherited independently. Determine the genotypes for the two parents for all possible matings producing the following offspring:

a. 318 one-pod, normal leaf : 98 one-pod, wrinkled leaf
b. 323 three-pod, normal lead : 106 three-pod, wrinkled leaf
c. 401 one-pod, normal leaf
d. 150 one-pod, normal leaf : 147 one-pod, wrinkled leaf : 51 three-pod, normal leaf : 48 three-pod, wrinkled leaf.
e. 223 one-pod, normal leaf : 72 one-pod, wrinkled leaf : 76 three-pod, normal leaf : 27 three-pod, wrinkled leaf.

Please show work and explain. =/ My teacher failed to explain this, so thanks! =]

2007-10-31 10:13:35 · 3 answers · asked by RAWR. 5

2007-10-31 09:36:51 · 18 answers · asked by Cody 3

Describe how the electron transport chain and the process of chemiosmosis generate the majority of the ATP molecules produced during cellular respiration.

2007-10-31 09:36:28 · 3 answers · asked by Anonymous

2007-10-31 09:17:16 · 3 answers · asked by Olga 2

2007-10-31 09:00:45 · 4 answers · asked by srs112982 1

fill in the blanks.....
blood is a mixture of four main parts. there are two types of cells called _______ cells which carry oxygen and _______ cells . blood also contains ________ which helps it clot . these are carried in a pale _______ liquid called __________ .

2007-10-31 08:59:56 · 5 answers · asked by Anonymous

why bacterium has 1024 type of protein but only one type of polysacharide?

2007-10-31 08:59:15 · 1 answers · asked by setareh n 1

i need this for my project...

2007-10-31 08:57:53 · 1 answers · asked by bree $ 1

2007-10-31 08:52:09 · 15 answers · asked by boardr 1

i need to know a couple of animals that are herbivores that live in grasslands

2007-10-31 08:43:53 · 3 answers · asked by Laurennn 1

PTC testing. Why is it common to be a taster than to be a non-taster?

2007-10-31 08:35:49 · 3 answers · asked by Anonymous

you want to refute or support.
1) frogs come from muddy soil because they always appear in that environment
2) Flies come from rotten meat because they always appear where there is meat rotting

2007-10-31 08:18:49 · 4 answers · asked by Anonymous