Biology - April 2007

- What are all the factors limiting cell size?
-Is SA:V a factor in limiting cell size? how?

2007-04-10 17:16:06 · 2 answers · asked by Anne-Ice♥cream 2

2007-04-10 16:55:54 · 4 answers · asked by Jasmine 1

When crossing RR with RR, the resulting gamete would be RR, right? and what about RR and PP. Would it be RP? They are all dominant so I don't know. Or do you use all four alleles for the resulting gamete and am I even using allele and gamete in the right context? So would it be RRRR and RPRP(RRPP)?

2007-04-10 16:32:24 · 6 answers · asked by Toni E 1

a.Herpesviruses and the virus that causes AIDS can remain latent inside our cells for long periods of time,b.a virus is generally considered to be alive because it is cellular and can reproduce on its own, c.the host cell provides most of the tools and raw materials for viral multiplication, d. viruses can enter a host cell when the protein molecules on the outside of the virus fit into receptor molecules on the outside of the cell

varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as: a.independent crosses, b. the F2 generation, c. hybrids, d.true-breeding, e. monohybrid crosses

2007-04-10 16:20:00 · 2 answers · asked by lindasue402004 1

Which of the following best illustrates homeostasis?

a)Most adult humans are between 5 and 6 feet tall.
b)The lungs and large intestines have large surface areas.
c)When blood salt concentration goes up, the kidneys expel more salts.
d)All the cells in the body are about the same size.
e)When oxygen in the blood decreases, you feel dizzy.

i thought it was C, but im not sure... i honestly dont understand any of these choices... so please explain your answers

2007-04-10 16:08:58 · 3 answers · asked by Anonymous

My friends and family always told me that my thumb and pinky aren't fingers. Are they?

2007-04-10 15:44:18 · 25 answers · asked by _Wonder_Woman_ 1

2007-04-10 15:40:36 · 3 answers · asked by mcghinich 1

2007-04-10 15:39:17 · 11 answers · asked by Anonymous

The reproductive cycle of a human is usually regulated by
1-gametes
2-hormones
3-natural selection
4-immune responses

Which statement best describes part for human reproductive process?
1-testosterone produced in the testes is transferred to ovary, where it influences embryonic development
2-testosternone produced in ovary influences formation of sperm within penis
3- Estrogen and progesterone influence the activity of vigina
4-progestrone stimulates the division of the egg within vigina

Which structure is correctly paired with its function?
1-fallopian tube: releases estrogen and progesterone
2-ovary: produces the releases the egg
3-uterus: provides the usual site from fertilization
4-virgina: nourishes a developing embryo

Which statement does not correctly describe an adaptation of the human female reproductive system?
1-it produces gametes in ovaries
2-it provides for external fertilization of an egg
3-it provides for internal development of the embryo
4-it removes excretions produced by the fetus.

2007-04-10 15:35:34 · 1 answers · asked by Anonymous

Which of the following pairs are mismatched?
1. Arthrospore -- formed by fragmentation
2. Sporangiospore -- formed within hyphae
3. Conidiospore -- formed in a chain
4. Blastoconidium -- formed from a bud
5. Chlamydospore -- formed in a sac

A. 2 and 5
B. 3 and 4
C. 2 and 3
D. 4 and 5
E. 1 and 2

2007-04-10 15:25:40 · 1 answers · asked by mackdjroc187 2

Explain the term "response" and disccuss why the ability to resspond is important for the survival of organisms in a natural habitat. In your discussion, refer to ONE example of response in animals and ONE example in plants.

2007-04-10 15:04:18 · 3 answers · asked by baby girl 1

Which process normally occurs at the placenta?
1-Oxygen diffuses from fetal blood to maternal blood
2-Materials are exchanged between fetal and maternal blood
3-maternal blood is converted from maternal blood to fetal blood
4-digestive enzymes pass from maternal blood to fetal blood

In humans, a sperm cell and an egg cell normally fuse in the upper portion of the
1-cervix
2-vagina
3-oviduct
4-ovary

Estrogen has a direct effect on the
1-fromation of a zygote
2-changes within the uterus
3-movement of an egg toward the sperm
4- Development of a placenta within the ovary

Which statement about sperm cell is true?
1-they are produced by females
2-they are fertilized in an ovary
3-they transport genetic material
4-they are produced by mitosis

2007-04-10 14:57:47 · 1 answers · asked by Anonymous

pigs, black Bfur is dominant toalbino and rough R coat is dominant to smooth. the 2 genes assort indeendently, A black-rough coated and albino-rough coated produce a lttler containing several albino-smooth coated offspring
a. give genotypes of black-rough coated parent
b. give the genotype of albino-rough coated parent
c. determine the phenotype ratio expected in offspring of these parents
thanks in advance

2007-04-10 14:51:49 · 3 answers · asked by jennifer 2

how does the menstrual cycle illustrate homeostatis? I;m trying to figure out if it has to do with the hormones or body temperatures

2007-04-10 14:50:20 · 2 answers · asked by dsds 1

2007-04-10 14:23:07 · 12 answers · asked by Matt 1

2007-04-10 14:03:11 · 1 answers · asked by isacm87 2

2007-04-10 13:57:36 · 5 answers · asked by bballmaster 3

2007-04-10 13:52:44 · 2 answers · asked by Anonymous

2007-04-10 13:42:49 · 3 answers · asked by Anonymous

Why does a cell spend 90% of its life in interphase?
Why does this stage make such a large part of the cell cycle?
I admit its straight from my homework, sorry, but no notes on it and my notes would of answered it :(
Anything will helps. Thanks for your time.

2007-04-10 13:26:44 · 2 answers · asked by Anonymous

I need to contruct a pie chart to represent the cell cycle.
color each of the 3 major components a diff. color and indicate subphases (ie. G1, S, and G2, ; PMAT) where necessary.

What exactly is it asking me to do?
Think it matters wether i do mitosis or meiosis?
Not very good with G1-, S, and G2 so I'm not even sure which one they are in. . Anything helps me in this case.
Thanks!

and you at least know a free download (perhaps a trial version) that actually lets me 'create and save' a full pie chart' without having to buy it because I'll only need it this one time otherwise I draw but teachers rules=computer only)

2007-04-10 13:12:21 · 4 answers · asked by Anonymous

2007-04-10 13:10:17 · 3 answers · asked by wise4567 1

w have 2 independentlyassorting genes control the production of feature pigment, gene B codes fro anenzyme that is blue pigment, gene Y code fore enzyme of yellow pigment, the recessive allele of each gene codes for a non functional enzyme and no pigment is made, with blue and yellow pigment in their feathers are green, while with no pigment in their feathers are white
two green are mated, theiroffspring are green, blue, yellow, and white.
what are thegenotypes ofgreen parents, what is genotype of each four colors of offspring, what fraction of the total number offspring should be each color
plz help i really need your help, thanks in advance

2007-04-10 12:59:11 · 1 answers · asked by jennifer 2

2007-04-10 12:58:50 · 5 answers · asked by dennis372006 2

2007-04-10 12:49:56 · 3 answers · asked by wise4567 1

stranded and what stages are they haploid or diploid?

2007-04-10 12:47:56 · 2 answers · asked by Skitahoe9 1

some diets call for protein-rich foods and the complete elimination of carbs. people on these diets often complain of frequent urination and increased thirst. what is the likely source of these symptoms?

2007-04-10 12:34:47 · 2 answers · asked by Anonymous

2007-04-10 11:38:14 · 10 answers · asked by Christopher S 2

How the discovery of life elsewhere in our solar system may affect the explanations for the origin of life ?

You can post simple answers.... like 2 to 3 lines
I googled it but couldn't find any sufficient site to get the answer
Please help me.. will be appreciated thank you

2007-04-10 11:30:29 · 3 answers · asked by melong_91 1

2007-04-10 11:21:08 · 9 answers · asked by DJ 1