An adult male produces sperm continuously by meiotic division of cells lining what structure?
A. Fallopian tubules
B. epididymis tubules
C. vas deferens tubules
D. Malpighian tubules
E. seminiferous tubules
Answer: E
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Which of the following is a correct statement about the formation of sustainable human stem cell
cultures?
a. Organs could not be grown for transplantation. b. Defective cells could be replaced with functional versions derived by stem cells (e.g., Parkinson disease). c. They could cure cancer. d. They could cure the common cold. e. They could cure the flue.
Which of the following does NOT occur in
prophase I of meiosis? a. cytokinesis b. pairing of homologues c. formation of a bipolar spindle d. crossing over e. condensation of chromosomes
What factors may affect the carrying capacity for a species in an environment? Is the carrying capacity usually a fixed number, and why or why not?
What will be an ideal response?
Tiktaalik is an important fossil for the understanding of phylogeny because it is an intermediate form between fish and amphibians.
Answer the following statement true (T) or false (F)