Why should you not use model organisms for genetic engineering?

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

Moving down the ramp from 6 meters to

Describe the two types of vascular tissue