What is the function of heart pacemaker?

✅ A. gastropods

Option A: gastropods Option B: bivalves Option C: arthropods Option D: platyhelminthes Correct Answer : gastropods Read more

✅ A. Periosteum

Option A: Periosteum Option B: Woven bone Option C: Epithelium lining Option D: Connective lining Correct Answer : Periosteum Read more

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Option A: Muscles Option B: Hydrostatic skeleton Option C: Parapodia Option D: Setae Correct Answer : Parapodia Setae Read more

✅ C. Phosphorus

Option A: Potassium Option B: Magnesium Option C: Phosphorus Option D: Iron. Correct Answer : Phosphorus Read more

✅ B. Insoluble

Option A: Soluble Option B: Insoluble Option C: Partially soluble Option D: Depends upon condition Correct Answer : Insoluble Read more

✅ D. It explains the mechanism of every chemical reaction

Option A: Specific enzyme can transform only a specific substrate Option B: Active site of an enzyme is a non flexible structure Option C: Active site does not change before during or even after the reaction Option D: It explains the mechanism of every chemical reaction Correct Answer : It explains the mechanism of every chemical reaction Read more

✅ B. Older sediment layers have less amount of these reaioactive isotopes as that of the young ones.

Option A: Older sediment layers have equal amount of these reaioactive isotopes as that of the young ones Option B: Older sediment layers have less amount of these reaioactive isotopes as that of the young ones. Option C: Older sediment layers have greater amount of these radioactive isotopes as that of the young ones. Option D: Older sediment layers did… Read more

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Option A: Nucleus Option B: Cytosol Option C: Mitochondria. Option D: Ribosomes Correct Answer : Read more