What is an oxygen and what is the benefit of oxygen?

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

In the category column, classify the following activities as either health promotion or health protection. if any of these actions fall under both the categories, write both. in the reason column, write down your reason for making each classification.

Avirus consisting of a single strand of rna, which is transcribed into complementary dna, is a ) proteaseb) retrovirusc) rna replicase virusd) nonenveloped virus