The oldest plant fossils indicate plants only had stems but no leaves, flowers, or roots.
true
false

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

Which of the following is a common danger of commercial fishing?

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity