A park ranger wants to increase the number of fragrant, sweet smelling flowers in the park. In the park, there are very few plan
ts with fragrant, sweet smelling flowers. Scientists think this is because plants with fragrant, sweet smelling flowers are often eaten by animals in the park before they can reproduce. The park ranger is planning to select only individuals of this plant species with fragrant, sweet smelling flowers to breed. The trait of fragrant, sweet smelling flowers is recessive (ff) in the species of plant. The goal is that all of the offspring will have fragrant, sweet smelling flowers, which the ranger can plant in the park. (AKS 3d, DOK 3)
A<em> fish ladder</em> is also known as fish steps, fish pass or fishway.
It is built around waterfalls, dams and locks.
The purpose of building a fish ladder is to<em> facilitate the natural migration of diadromous fishes.</em>
A fish ladder helps the fish to pass through the barriers by leaping up or swimming through the low steps of the ladder and reach into the water on the other side.
Since, without the fish ladder the barriers will not allow the migration of fishes, it is essential to be built around the dams, waterfalls and locks.
