Projectile motion is caused by?

a. the downward force of gravity
b. the initial forward velocity
c. a final vertical velocity
d. the downward force or gravity and an initial forward velocity

The answer is D

The downward force of gravity and an initial forward velocity

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

the answer is d p: cell, q: organ, r: organ system, s: tissue