Many scientists do not consider viruses to be living organisms. Why is this?
a. because they are surrounded by a capsid
b. because they cannot be killed
c. because they are dependent on their hosts' metabolic machinery for replication
Ans: c. because they are dependent on their hosts' metabolic machinery for replication
You might also like to view...
Which of the following statements would not be consistent with the theory for the endosymbiotic origin of mitochondria and chloroplasts?
A. Mitochondria and chloroplasts have their own DNA enclosed within a nuclear envelope. B. The composition of the outer membrane of chloroplasts and mitochondria is similar to the plasma membrane of eukaryotic cells. C. The composition of the inner membrane of chloroplasts and mitochondria is similar to the plasma membrane of prokaryotic cells. D. Mitochondria and chloroplasts have some enzymes unique to them. E. Genes encoded within mitochondria and chloroplasts indicate a closer relationship to prokaryotes than do most nuclear genes. Clarify Question · What is the key concept addressed by the question? What type of thinking is required? Gather Content · What do you already know about the origin of mitochondria and chloroplasts? How does it relate to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What are the base-pairing rules for DNA?
a. A-G, T-C c. A-U, C-G b. A-C, T-G d. A-T, G-C
Alfred Wallace
a. conducted extensive fieldwork in the Amazon River Basin. b. wrote letters to Darwin and Lyell about patterns in the geographic distribution of species. c. is known as the “father of biogeography.” d. independently formulated a theory of natural selection. e. did all of these.
Which of the following statements concerning receptors is FALSE?
a. They are found inside the cell and on the cell surface. b. They are proteins or glycoproteins. c. They are also called ligands. d. They are highly selective. e. They are activated by binding to a signaling molecul