1. ___ muscle tissues contract quickly but also get tired quickly. They use a lot of energy and are great for "sprints" of effort.
A. Dynamic
B. Endurance
C. Slow- twitch fibers
D. Fast-twitch fibers
Please help I have no idea

Cultural, economic , and social changes that resulted in the migration of more people into cities - utilitarianism -industrial revolution -age of enlightenment

Which of the following is not a symptom of chronic fatigue syndrome

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors. b) transcription from the host cell rna polymerase introduces numerous mutations. c) capsid proteins from the host cell can replace the viral capsid. d) viral rna is translated by host cell ribosomes.