Write a sentence explaining the connection between each pair of words:
1. cell membrane, cytoplasm
2. lipids, proteins
3. nucleus, dna

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Which of the following is the smallest unit that would contain a complete copy of the entire human genome? a) one human somatic cell b) one human chromosome c) all of the dna of one human d) one human gene