What Is Keratin Debris Can Anyone Help Me With Some Study Questions About Sea Turtles?

Can anyone help me with some study questions about sea turtles? - what is keratin debris

I have to memorize these answers, but I do not know what help is welcome!

1. What is the difference between a turtle, a turtle and a tortoise?
When sea turtles live in the sea Terrapins are on the ground. The turtles live in fresh water.
B turtles live in the sea. Of freshwater turtles are found in freshwater. Turtles live in the country.
C turtles live in fresh water. The freshwater turtles found in the sea. The turtles live in the ocean.

2. Heal if a turtle hit by a ship and injured his dish, the wound can? Identify the correct answer to this question and the exact names of certain parts of the body as a response.
R. Yes, heal, be the deposit of the situation. A turtle shell in two parts: the upper part asis called keratin, and called the lower half of the shield.
B. No, will not cure the Deposit to be in the situation. A tortoise shell named in two parts: the upper part, keratin, and called the lower half of the shield.
C. Yes, heal, be the deposit of the situation. A turtle shell in two parts called the upper part of the shield, and the lower half, the name of the shell.
D. Yes, heal, be the deposit of the situation. A turtle shell in two parts: the upper part, called the carapace and the lower half of the shield mentioned.

3. Which of the following is an example of a natural risk that sea turtles face?
A. Entanglement and uptake of marine debris
As raccoons, birds and crabs to eat eggs and juveniles
Against invasive species C.tion