2 Points

Which role do fish ladders serve?

O

A. They allow fish farmers to raise certain kinds of fish.

O

B. They help some kinds of fish migrate past dam barriers.

O

C. They improve the nutritional value of some kinds of fish.

O

D. They help certain kinds of fish stay physically fit.

B. They help some kinds of fish migrate past dam barriers.

Explanation:

Description

A fish ladder, also known as a fishway, fish pass or fish steps, is a structure on or around artificial and natural barriers (such as dams and waterfalls) so as to enhance diadromous fishes' natural migration as well as movements of potamodromous species.

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne