HELPhelp ASAP)If a substance has a half-life of 45 days, how much of the original substance would be left after 90 days?
A. One half (1/2)
B. One quarter (1/4)
C. One eighth (1/8)
D. One tenth (1/10)

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Looking at this image, what relationship can be drawn from it? the lower the degree of latitude, the lower the degree of temperature there is no relationship between latitude and temperature the higher the degree of latitude, the higher the degree of temperature the lower the degree of latitude, the higher the degree of temperature

The transport tubes from food came down the plant are called?