How many kcal are expended during 45 minutes of jogging for a 68 kg person (150lbs)?

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing

Which structure in the cardiovascular system connect arteries to veins?

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome