What is the correct order of the passage of sperm, starting at the site of development and exiting the body?
A. Initial production occurs in the seminiferous tubules, sperm mature in the uterus, they then enter the vas deferens, they then pass through the ejaculatory duct and exit the body through the urethra.
B. Initial production occurs in the seminiferous tubules, sperm mature in the epididymis, they then enter the vas deferens, they then pass through the ejaculatory duct and exit the body through the ureters.
C. Initial production occurs in the seminiferous tubules, sperm mature in the epididymis, they then enter the fallopian tubes, they then pass through the ejaculatory duct and exit the body through the urethra.
D. Initial production occurs in the epididymis, sperm mature in the seminiferous tubules, they then enter the vas deferens, they then pass through the ejaculatory duct and exit the body through the urethra.
E. Initial production occurs in the seminiferous tubules, sperm mature in the epididymis, they then enter the vas deferens, they then pass through the ejaculatory duct and exit the body through the urethra.
Answer: E
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A. 60; 99.9; 99.9; 100 B. 100; 50; 50; 99 C. 75; 100; 60; 90 D. 40; 99.9; 100; 75 E. 10; 80; 25; 70
Boston ivy is able to climb up buildings due to its
a. cork cambium. b. fibrous roots. c. sticky pads. d. vascular cambium
The arms of human chromosome 2 are syntenic with two different chimpanzee chromosomes. What mechanism could have caused this pattern of synteny?
A) an inversion in the human chromosome B) an inversion in one of the chimpanzee chromosomes C) gene duplication in the human chromosome D) exon shuffling in the chimpanzee chromosomes E) a translocation involving two chromosomes
Huntington disease
a. is inherited as an autosomal dominant condition. b. results in progressive deterioration of the nervous system. c. often does not show any symptoms until after the child-bearing years. d. is caused by an expansion mutation. e. is all of these.