In a cross-bed, the bottoms of rock layers are curved due to the bottoms being eroded. true false

False

Explanation:

Cross bed rocks are basically sedimentary rocks that are faulted to produce folded and tilted layers. Therefore, these rocks are primarily found as a part of ripples or dunes. These are curved at the bottom/base so that they could form or tangential surface to the base.  

The upper portion of ripples are usually lost in erosion and it is the lower portion of the ripples that is represented by the cross beds.

Hence, the given statement is false

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy