2. 1.An inference is an explanation to your Problem. 2.There is only one manipulated variable in every experimental set-up. 3.Biology is a Natural science.

3. 4.To get the measurement of a colorless substance using a graduated cylinder, you must read the lower meniscus at an eye level. 5. Humility helps the scientist come up with a valid and reliable result. 6. Vaccine gives acquired passive immunity to a baby.

4. 7.Spatula is used to transfer liquid substances. 8.Making prediction is safe when there is a pattern in the observed data. 9.Stethoscope is a product technology. 10.The atria pump blood out from the heart.

5. 1.A. nucleic acid B. proteins C. vitamins D. lipids 2. A. funnel B. pipet C. graduated cylinder D. buret 3. A. veins B. Heart C. arteries D. capillaries

6. 4. A. breathing B. jogging C. swimming D. dancing 5. A. RBCB. WBC C. Skin D. Immunity 6. A. lymph B. blood C. lymphatic vessels D. lymph nodes

7. 7. A. Polio B. AIDS C. Stroke D. Alzheimer’s Disease 8. A. Thymosin B. Heart C. Adrenaline D. Estrogen 9. A. Uterus B. Tonsils C. Vagina D. Ovaries

8. 10. A. Lymph B. Sensory C. Association D. Motor 11. A. 500 ml B. twice a day C. Colorless D. 20 drops 12. A. P.E. Class B. Orange ball C. Jogging pants D. Dribbling

9. A.________________ Circulation 1 Right ventricle pumps deoxygenated blood. ____ Oxygenated blood enters the heart through the pulmonary vein. ____The blood goes to the lungs to get oxygen. ____ Capillaries exchange carbon dioxide to oxygen. ____ De-oxygenated blood passes the pulmonary valve to the lungs. ____ Left atrium collects oxygenated blood.

10. B. _________Circulation 1 left atrium ____ mitral valve ____ aortic valve ____ left ventricle ____ arteries ____ kidneys

11. C. Pathway of ________ __ The brain interprets the message. 1 The stimulus is picked up by the receptor cells. ___ The motor neurons carry the message away from the brain. ___ The stimulus is converted into impulse/message. ___ The muscle receives the message and carries out the reaction/response. ___ The impulse/message is carried by the sensory neurons to the interneurons in the CNS.

12. D. Pathway of Blood ______ capillaries ______artery ______veins

13. E. Pathway of Impulse ___ Axon ____ Interneuron ___Dendrites ____Sensory ___Cell Body ____ Motor

14. A. Hormones 1. Hypothalamus gland: _____; Pituitary Gland :growth hormone 2. Melatonin: Pineal gland; ____________: Parathyroid gland

15. 3. Islets of Langerhans: _____ ; Adrenal gland : adrenaline 4. Testes: _______________ ; Ovaries : Progesterone 5. Thymosin : _________ ; Thyroxin : Thyroid Gland

16. B. Body Systems 1. waste removal : _____; control: nervous system 2. regulation and control : endocrine system; ____________: immune & lymphatic system

17. 3. gas exchange : ___________ ; transport : circulatory system 4. movement : _______________; reproduction : reproductive system 5. food absorption : _________ ; support : skeletal system

18. C. Diseases 1. Hypertension: _____________; Hypotension: Low Blood Pressure 2. ______: Cancer of the Blood; Anemia: Low hemoglobin in the blood

19. 3. ______________: permanent loss of memory ; Amnesia: temporary loss of memory 4. Heart attack : no blood supply in the heart; ____:no blood supply in the brain 5. Cancer of the Lymph nodes: ________; Hypothyroidism: Cretinism