Science Game (2 Viewers)

[suzlee]

Twin thread to "Maths game".

Same concept... answer & ask questions from year 9-10 science syllabus.


I'll start:
State Newton's first law and give an example of its application.

 

[suneeta =)]

Twin thread to "Maths game".

Same concept... answer & ask questions from year 9-10 science syllabus.


I'll start:
State Newton's first law and give an example of its application.

newtons first law states that an object in motion or at a state of rest will remain at a constant velocity or rest unless acted upon by an external force. Eg a rock flying around in outerspace keep flying until something stops it or alters it's path, whether that be a collision or the gravity of a nearby planet/star.

 

[suneeta =)]

what is the difference between incomplete dominance and co-dominance?

 

[suzlee]

what is the difference between incomplete dominance and co-dominance?

They are both occurences of a combination of two phenotypes (as a result of two dominant genes), but a co-dominance shows both phenotypes whereas incomplete dominance shows something in-between the two.

I tried to make some kind of sense

 

[XShiv]

In both instances, both alleles are expressed. How they're expressed is different.

In incomplete dominance, the phenotype resembles a sort of blending of the two alleles. That is, if you have an allele for red petals and and allele for white petals, you end up getting pink petals with incomplete dominance.

Co-dominance is when both alleles are expressed separately. Human blood type is a good example of this. The A and B alleles are both expressed, so you get the AB blood type. In the petal color example above, you'd get a flower with white and red splotches.

 

[suneeta =)]

name the scientist who proposed the theory of natural selection

 

[suzlee]

Name a global issue

 

[suzlee]

name the scientist who proposed the theory of natural selection

ohhhhh was it Darwin and some Wallace guy? don't know the full name

 

[suneeta =)]

Charles Darwin proposed the theory of natural selection.

Who's Wallace?

xD

 

[suneeta =)]

dyu mean Watson?

James Watson and Francis crick developed the first double helix DNA model and won a Nobel prize for it aka the Watson crick model

 

[suzlee]

Charles Darwin proposed the theory of natural selection.

Who's Wallace?

xD

I dunno but just as Darwin was about to publish his research, he heard news about a Wallace guy who had the same idea as him............... so he got freaked out that all his 20 years' worth of work was gonna be stolen by him and ran to the publisher to get it done before it happened

NOT important though

 

[pwoh]

There was an Alfred Wallace guy who had a similar theory to Darwin.

Describe the processes of meiosis and mitosis.

 

[suneeta =)]

Mitosis is a form of cell division used for growth, repair and replacement of tissues. It occurs in the nucleus of the body cells. There is only one cell division that occurs in this process. This division contains four stages. They are Prophase, metaphase, anaphase and telophase. This cell division process results in two daughter cells identical to the parent cell. They both contain the diploid number of chromosomes.

Meiosis is like and extended version of mitosis. It is used in the production of gametes. This type of cell division takes place in the reproductive organs.. Gonads to be more specific. There are two cell divisions completed in this process. The first division is exactly like mitosis. The second cell division is made up of another four stages. These are prophase II, metaphase II, anaphase II and telophaseII. At the end of this state four daughter cells have been produced which contain the haploid number of chromosomes.



One of the very few topics I listened to. XD

 

[XShiv]

meiosis = sexy time!

mitosis = cell replication!

 

[suneeta =)]

roflol sexytime xDD

what's your msn shiv?

 

[Deer]

Ok, let's start again.


Outline the lifecycle of a star.

set it out like: _______ -> _________ -> _________ ->

 

[ttrinix]

nebula--> protostar --> average star -->red giant --> planetary nebula --> white dward --> black dwarf

nebula --> massive star--> red supergiant -->supernova --> nebula + black hole or neutron star

what is the function of the male rep. system?

 

[Miss Sunshine]

Male rep. system produces sperm which fertilises the ovum to form a zygote.

Relate the natural selection theory to the evolution theory.

 

[XShiv]

Science SC Question

thanx guys.
hyperlink above...

 

[pwoh]

Science SC Question

thanx guys.
hyperlink above...

D?

Name & describe 7 chemical general equations you have learnt, including examples.