Answer:
The continents were once connected, and marsupials were able to migrate over the land.
Explanation:
There are a lot of evidences present which indicates that the continent were once connected and present as a super continent but with the passage of time, this super continent splits into two parts and go far from each other. Marsupials also present on two different continents such as America and Australia. These two continents first attached to one another and these Marsupials spreads on these lands. With the passage of time, they splits and go far from one another.
All living organisms are made of only 20 different aminoacids- this is the correct answer! This means that the genetic code only codes for those 20 aminoacids (for example Glutamine and Lysine).
The 20 aminoacids that can form proteins are also called Proteinogenic amino acids.
Answer:
I think B
Explanation:
The circulatory system is the method of transport in plants and animals. Animals must have nutrients and oxygen reach every cell in their body. Plants must have nutrients and carbon dioxide reach every cell in their "body." The circulatory system is how these things are carried around the living organism.
Proteins are the building blocks of carbohydrates
