Ras

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1.
1 point
The complete disappearance of a species from Earth
2.
1 point
The complete disappearance of a species from Earth
3.
2 points
Blood group AB is a result of
4.
2 points
Which one of the following occurs when you look up from reading a book to look at a distant mountain on a clear, sunny day? The . . .
5.
1 point
An opening on primate skulls through which the spinal cord passes
6.
2 points
In accomodation of the human eye, the . . .
7.
1 point
A sudden change in genetic sequence
8.
2 points
The sensation of sight in human beings originates in the . . .
9.
2 points
The optical disc where the fibres of the optic nerve leave the eyeball, is the . . .
10.
2 points
In accomodation of the human eye, the . . .
11.
2 points
When the tension of the suspensory ligaments in the human eye is slackened, the . . .
12.
2 points
The probability that two heterozygous parents will have a homozygous dominant offspring , is . . .
13.
2 points
RNA differs from DNA in that it . . .
14.
1 point
A group of similar organisms that can breed to produce fertile offspring
15.
1 point
A cell condition in which the nucleus contains a single set of chromosomes
16.
2 points
A scientific idea that still has to be tested is referred to as
17.
1 point
The complete disappearance of a species from Earth
18.
1 point
Different forms of a gene which occur at the same locus
19.
1 point
The biotechnical production of genetically identical offspring
20.
1 point
A chemical substance that is designed to kill pathogenic bacteria