Biology - January 2007

It's either interphase, prophase, metaphase, anaphase, or telophase. I think it's interphase but I'm not sure. Thank you for helping!

2007-01-23 17:54:19 · 2 answers · asked by s 1

I need to know because I am planning to leave this earth and looking for another more suitable habitual extrasolar planet! :p!!

2007-01-23 17:47:20 · 14 answers · asked by hyaki ikari 2

The pituitary gland controls blood water concentration.
This gland produces the hormone ADH.
ADH is carried by the blood to the kidneys.
ADH increases the permeability of the kidney tubules allowing water to be reabsorbed from the tubules into the blood.
If blood water concentration falls, more water reabsorption is needed so that less water is lost as urine. ADH production is increased.
If blood water concentration rises, less water reabsorption is needed so that more water is lost as urine. ADH production is decreased.

which is the stimulus, effector, detector, set point, integrator and output?

2007-01-23 17:45:22 · 2 answers · asked by Anonymous

1. Choose the BEST answer
Homeostastis is:
a) the maintenance of internal constancy in the face of a changing external environment.
b) the process of conforming to a changing environment.
c) maintained through feedback loops.
d) depends on an animal’s ability to detect external conditions.
e) all of the above except b.
f) a and c.
g) all of the above except d.

2. A phenotype is the product of:
a) a genotype, the environment has no influence.
b) an animal’s behavior.
c) a negative feedback loop.
d) an animal’s genetic makeup and its interaction with the environment.
e) the milieu interieur (internal environment).

3. True or False?
Differential survival of organisms with distinct phenotypes may result in evolutionary change in the genotype of a population over many generations.

4. The unusual properties of water have an important impact on biological processes. Which of the following is/are true?
a) Water has a lower melting point than most other solvents.
b) Water has a low heat of vaporization making sweating an effective cooling strategy for mammals.
c) Water has a higher melting point than most other solvents making it a very stable liquid.
d) Water is more dense as a solid which has important implications at the poles.
e) Water’s ability to form hydrogen bonds result in its unusual physicochemical properties.


5. Cholesterol influences membrane properties in the following ways except:
a) It is hydrophobic so does not integrate into the lipid bilayer.
b) It can reduce the membrane permeability to low-molecular weight solutes.
c) It increases membrane fluidity.
d) It strengthens the interactions between phospholipid head groups.
e) a and d

6. True or False?
Facilitated diffusion requires energy in the form of ATP to drive transport.

7. Which of these statements about the cytoskeleton is NOT true?
a) It supports networks of organelles like the Golgi apparatus within the cell.
b) It is a static structure that maintains the shape of the cell.
c) It is made up of protein polymers: microfilaments, microtubules and intermediate filaments.
d) It is involved in cellular processes like signal transduction.
e) None of the above, they’re all true.

8. True or False?
If potassium ions move out of an excitable cell, the magnitude of its membrane potential will increase (hyperpolarize); whereas if sodium channels open and Na+ moves into the cell, the magnitude of the membrane potential will decrease (depolarize).

9. Fill in the blank:
mRNA is used as a template to make proteins in a process called ___________.

10. True or False?
The electrochemical gradient that sets up an excitable cell's membrane potential can be created by simple diffusion.

2007-01-23 17:44:42 · 2 answers · asked by jummy63 1

Is it possible for just anybody to paint a masterpiece, win Wimbledon or write a bestseller? How much is purely down to genetics? Does the genetic part always show itself early (i.e. she was a natural tennis player at 11 years old) or can the genetic part show much later due to the help of additional training?

Can no real natural ability be turned into something special by endless training?

2007-01-23 17:36:25 · 9 answers · asked by Andrew 2

2007-01-23 17:32:08 · 7 answers · asked by Jackie B 1

2007-01-23 17:21:06 · 7 answers · asked by Lai Yu Zeng 4

2007-01-23 17:17:45 · 7 answers · asked by Jackie B 1

the teacher was talking about it i got very confuse

2007-01-23 17:07:22 · 3 answers · asked by Anonymous

2007-01-23 16:46:43 · 3 answers · asked by Jackie B 1

I just need to know what they are called

2007-01-23 16:41:57 · 6 answers · asked by Teth soda 1

BIO HELPPPP!!!!!!!!!!!!!!!!!!

2007-01-23 16:14:42 · 13 answers · asked by cb09 1

You may think I am nuts... but just wondering. How about Dolphins? I know the cromosms must match... no other animal has similar enough cromosm as humans?

2007-01-23 16:11:42 · 6 answers · asked by Anonymous

2007-01-23 15:56:45 · 2 answers · asked by ♪ ♫ ☮ NYbron ☮ ♪ ♫ 6

, be it precipitating below a chilled alcohol &/or H2O environment, or a string or ball of relatively dry 100% pure DNA...

AND, is DNA STILL viable & "alive" dry and by itself? if not, can it be revived / recovered, and to what extent?

2007-01-23 15:41:48 · 2 answers · asked by techronarrow 2

2007-01-23 15:39:29 · 9 answers · asked by annalou 1

in the simple bio-lab experiment that extracts DNA from fruit, what is the best type of alcohol to use?

isprop? poly vynal?

2007-01-23 15:37:25 · 4 answers · asked by techronarrow 2

I tried to do this poll before but it didn't work out cause no one gave me there info. I want to find out if sexuality or gender has an affect on our fear of spiders as in your english household kinda big looking spider, in phil jupitos terms a catagory 2 spider. so please say on a scale of 0-10 your fear, gender and sexuality, bisexual is not a possible catagory as Dr Hamer could not justify it in his research for the anotomy of desire so I won't either. You may email me the the graph or await its publication in the new york times science monthly addition. Thankyou very much!!

2007-01-23 15:31:32 · 13 answers · asked by Anonymous

I mean the excitement
Also the stress that comes from the failures of a level

2007-01-23 15:11:51 · 15 answers · asked by Ireqiredlotofhelp 1

2007-01-23 15:05:46 · 4 answers · asked by Lesly B 1

we could do a survey hen find out state sexuality and gender and then on a scale of 1-10 how much you fear spiders and if you like your 2 bit opinion also.

2007-01-23 14:57:57 · 24 answers · asked by Anonymous

2007-01-23 14:57:06 · 4 answers · asked by Anonymous

Is 36 and 37 correct? and how do i answer #38 am i suppose to find the amino acid sequence for mRNA or tRNA?
http://img256.imageshack.us/img256/7762/mydc00231xb.jpg

2007-01-23 14:55:49 · 5 answers · asked by santa_isntreal 2

2007-01-23 14:28:34 · 4 answers · asked by Anonymous

Is urgent

2007-01-23 14:28:11 · 1 answers · asked by miguel d 1

2007-01-23 14:26:53 · 2 answers · asked by fabulous101 2

2007-01-23 14:20:02 · 6 answers · asked by freckles 1

Kingdom Monera includes bacteria. Why is this good for humans?

2007-01-23 14:11:10 · 6 answers · asked by Anonymous

2007-01-23 14:02:01 · 3 answers · asked by Anonymous

2007-01-23 13:48:48 · 3 answers · asked by Anonymous