O Level Biology MCQs - Complete Course
Heart: O Level Biology MCQs App & e-Book Download - 179
Apps:
MCQ: 179
Back flow of blood from right ventricle to right atrium is prevented through
- semilunar valves
- mitral valves
- tricuspid valves
- median septum
c
O Level Biology App & e-Book Tests PDF Download
Piliferous Layer Test 190
Free Online Biology Test 191
What is Excretion Test 192
Biotic and Abiotic Environment Test 193
Anemia and Minerals Test 194
Genetic Engineering and Biotechnology Test 195
O Level Biology Questions Test 196
Viruses and Biochemical Parasites Test 197
School Level Biology Test 198
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O Level Biology MCQs eBook Download
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