Grade 9 Science Quiz
Quiz by Althea Hushin Gerona
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- Q1
What system is responsible for the exchange of oxygen and carbon dioxide between the air and the cells?
respiratory
digestive
excretory
circulatory
30s - Q2
Which part of the respiratory system filters and warm the air upon entering it?
air sac
nasal cavity
diaphragm
bronchi
30s - Q3
What is the primary organ of the circulatory system?
Arteries
blood
Heart
veins
30s - Q4
A type of circulation which is described by the movement of blood through the tissues of the HEART.
Systemic
Coronary
Respiratory
Pulmonary
30s - Q5
The _______ prevents the back flow of blood.
atrium
ventricle
valve
septum
30s - Q6
A red cow is crossed with a white cow and produced an offspring that is a roan cow. What is a roan cow?
A purebred white cow
A purebred red cow
A pink cow
A cow with red hair and white blotches
30s - Q7
In humans, maleness or femaleness is determined by a pair of sex chromosomes called X and Y. What is the genotype for males?
XX
XY
XO
XXY
30s - Q8
It is a hereditary material and is also known as the blue print of life.
RNA
tRNA
DNA
mRNA
30s - Q9
A DNA strand has the following bases: A A G C C A. What are the bases on its complementary strand?
A A G C C A
C C A T T C
TTCGGT
A C C G A A
30s - Q10
It happens when there is removing or clearing of forest to include cutting of all trees, mostly for agricultural or urban use.
Water pollution
Acid rain precipitation
deforestation
Eutrophication
30s