Which of the following is regulated by the kidneys?
A. blood pressure
B. plasma sodium levels
C. blood volume
D. blood pH
E. All of the choices are correct.
Answer: E
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Only high-risk individuals such as scientists working with the organism, livestock workers, and military personnel are vaccinated for anthrax
Indicate whether the statement is true or false.
What is the result of DNA ligase's action?
A. DNA is broken up at specific sites. B. DNA fragments are joined together. C. DNA translation occurs. D. DNA transcription occurs. E. DNA is condensed to chromosomes.
Which molecule serves as the template during transcription?
A) DNA B) mRNA C) tRNA D) polymerase
In biology class, Joan makes careful observations using a microscope of stained cells undergoing meiosis. During which phase of meiosis will she see homologous chromosomes first pair up?
A) anaphase I B) prophase I C) metaphase II D) metaphase I