Which best describes thermal energy?
1. it is the difference between internal energies of two or more substance
2. it is the sum of internal energies of two or more substances.
3. it is the portion of internal energy that can be transferred from one substance to another.
4. it is the portion of potential energy that can be transferred from one subtance to another.

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination

What is the most abundant vertebrate on earth?