Which cell structure is most likely responsible for sensing gravity?
A. central vacuole
B. Golgi appartus
C. chloroplast
D. amyloplast
E. apical meristem
D. amyloplast
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Which of the following statements about the human male reproductive system is false?
A. Constriction of the arteries and dilation of the veins in the penis causes a change in blood flow that leads to an erection. B. The scrotum hangs outside of the abdominal cavity because spermatogenesis requires cooler temperatures. C. Sperm become motile in the epididymis. D. Both sperm and urine leave the body through the same structure. E. The head of the penis is known as the glans penis.
Triploid cells have three copies of each chromosome rather than two. If a triploid cell undergoes
meiosis, it produces inviable products. Why is this the case?
What will be an ideal response?The female gametophyte in flowering plants forms in a
a. calyx. b. carpel. c. receptacle. d. corolla. e. stamen.
The anaerobic Clostridium species are troublesome pathogens largely because of their capacity for
A. endospore production. B. rapid reproduction. C. oxygen production. D. biofilm production. E. high salt tolerance.