Explain how blood samples taken from men who have undergone an orchidectomy (removal of the testes) and women have measurable levels of testosterone
What will be an ideal response?
The adrenal cortex of both sexes secretes small amounts of testosterone.
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Inside its beak an octopus has a rasping tongue that is used to tear apart food. Which gastropod structure is this analogous to?
A. Mantle B. Shell C. Radula D. Nephridium Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about mollusk feeding? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In angiosperms, pollen is the product of a haploid microspore dividing mitotically. Therefore, pollen is
A. a sporophyte. B. a seed. C. a gametophyte. D. a spore. E. sperm.
The bacterium Staphylococcus aureus is commonly found in the nasal cavity of healthy people. If inhaled into the lungs, however, it may cause pneumonia. Staphylococcus aureus is best described as
A) a parasite. B) resident microbiota. C) a mutualist symbiotic partner. D) transient microbiota. E) both resident microbiota and opportunistic pathogen.
Which of the following lines of evidence suggest that mitochondria evolved from the endosymbiosis of a pre-eukaryotic cell with a prokaryote
A. they conation circular molecules of DNA B. they contain 70S ribosomes C. they divide independently from the cell D. all of these suggest