Life sciences Grd 12 Test your self – paper 2 June 2018

Which ONE of the following is a mechanism of reproductive isolation?
A Extinction
B Breeding at different times of the year
C Mutation
D Independent assortment

 Who formulated the law of use and disuse?
A Lee Berger
B Rosalind Franklin
C Gregor Mendel
D Jean Baptiste de Lamarck

Which ONE of the following features is found in BOTH humans and African apes?
A Short upper arms
B Claws instead of nails
C Opposable thumbs
D Small brain

Scientists made an observation that some species of butterfly are
more numerous during wet summers than dry summers. In order to
“investigate this, the next step would be to …”
A record the results.
B state a hypothesis.
C measure the results.
D draw a conclusion.

 REFER TO THE DIAGRAM BELOW SHOWING THE INHERITANCE OF HAEMOPHILIA IN A FAMILY.

Which ONE of the combinations in the table below is CORRECT for BOTH individuals 1 and 5?

 REFER TO THE DIAGRAM SHOWING THE INHERITANCE OF HAEMOPHILIA IN A FAMILY AND ANSWER QUESTION BELOW 

What is the percentage chance that individuals 3 and 4 would have a child with haemophilia?
A 100%
B 75%
C 25%
D 0%

A dye stains a particular type of nucleic acid red. When this dye was “used to identify which organelles in a cell contain this nucleic acid, only the nucleus and ribosomes stained red. This result shows that the dye stains structures that contain …

A DNA.
B RNA.
C DNA and protein.
D both DNA and RNA. 

Study the diagram below.

Which present-day finch is LEAST related to all the others?
A Woodpecker finch
B Large tree finch
C Mangrove finch
D Vegetarian tree finch