Which of these is the portion of the heartbeat that involves contraction of the heart?

A) pacemaker B) systole C) diastole D) cardiac cycle


Answer: B

Biology & Microbiology

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Which of the following describe a role that ethylene plays in plant physiology. Check all that apply.  

_____  Retarding stem and root elongation. _____  Hastening the ripening of fruit. _____  Inhibition of leaf abscission. _____    Inhibition of lateral bud growth. _____  Accelerates the loss of damaged fruits.

Biology & Microbiology

All of the following processes are located within a membranous structure EXCEPT

A. protein synthesis (translation). B. cell respiration - electron transport chain. C. photosynthesis - light reactions. D. intracellular digestion of food particles.

Biology & Microbiology

Which cellular component is common to all cell types?

a. cell wall b. mitochondria c. cytoplasm d. nucleus e. endoplasmic reticulum

Biology & Microbiology

During glycolysis, glucose is broken down into

A. ATP. B. NADH. C. acetyl CoA. D. oxygen. E. pyruvate.

Biology & Microbiology