The boundary where fresh water feeds into salt water is called a

The boundary where fresh water feeds into salt water is called an estuary. Estuaries and the wetlands surrounding them are bodies of water that are commonly seen where rivers meet the sea. Estuaries are home to different animal groups and distinctive plants that have adapted to salty water, which is a combination of fresh water draining from the land and salty seawater. Estuaries are among the most productive ecosystems in the world. A lot of animals depend on estuaries for migration stopovers, places to breed, and food.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]