Third phase of mitosis; chromosomes are aligned at the metaphase plate.
What will be an ideal response?
metaphase
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Review Figure 19.15 below: The lactose operon is an example of negative regulation by a repressor whose function is modulated by an inducer
A. true B. false
Synthetic thyroxine taken orally in the form of pills
is the recommended treatment for a. hypothyroidism. b. goiters. c. hyperthyroidism. d. Graves’ disorder. e. acromegaly.
During male ejaculation, the internal urethral sphincter closes tightly to
A) prevent urine from leaking into the urethra. B) isolate the ureters from the urinary bladder. C) block movement of mucus from the bulbourethral gland into the ejaculatory duct. D) keep sperm from moving into the ductus deferens. E) allow seminal vesicle to transfer sperm to the epididymis.
Which of the following lack a nucleus and are structurally simple?
A. Eukaryotes B. Prokaryotes C. Fungi D. Algae E. Protists