If a man expresses an X-linked recessive trait, we can draw the following conclusion:A
His father carried the mutation.
B. His father transmitted the trait to his son.
C. His mother did not carry the mutation gene.
D. His mother was heterozygous or homozygous for the trait.
E. All his brothers will also show the trait.
D
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Spirochetes are able to move due to ________.
A. a periplasmic flagellum B. pseudopods C. glycocalyx for gliding motility D. a membrane-bound flagellum E. cilia serving as walking feet
Bees are a colonial species and live in hives with thousands of other bees. Which of the following is an example of commensalism?
a. a bee hive located in an attic space b. a bee hive in the trunk of a tree c. a bee hive built in the ground d. a bee hive in a wall e. a bee hive in a garage
Lichens sometimes reproduce asexually using
a) small clusters of fungal hyphae surrounding photosynthetic cells. b) specialized conidiophores. c) coenocytic fungal hyphae located within photosynthetic cells. d) the fruiting bodies of fungi. e) flagellated, conjoined spores of both the fungus and alga.
Iron is an important element in human body cells. If iron has an atomic number of 26, what does this tell you about this element?
A) An iron atom has 13 electrons and 13 protons. B) An iron atom is unable to become an isotope. C) An iron atom has 26 protons. D) An iron atom has 13 protons and 13 neutrons.