Which of the following is CORRECT about the prokaryotes known as deeply branching bacteria?
A) They are chemoheterotrophs.
B) They lack peptidoglycan walls.
C) They are commonly found in acidic, anaerobic conditions.
D) They grow in long branching filaments.
E) They are photosynthetic.
C
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A hybrid zone is defined as an area where two populations may breed and produce ____
a. inviable, sterile offspring b. viable host races c. inviable hybrid subspecies d. viable, fertile offspring e. viable, sterile offspring
The first colonizers of bare rock are often:
a. angiosperms b. lichens c. mycorrhizae d. sac fungi e. zygote fungi
The primary consumers in natural communities
are a. herbivores. b. carnivores. c. scavengers. d. decomposers. e. all of these
The two common vectors used to transfer a piece of DNA into a cloning host are ________ and ________.
Fill in the blank(s) with the appropriate word(s).