A sponge body type consisting of one spongocoel having many folds is called:
a. asconoid.
b. syconoid.
c. leuconoid.
d. hexactinellida.
e. demospongoid.
B
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Why do scientists insert their DNA of interest into the middle of the lacZ coding sequence?
a. It makes the bacteria resistant to the antibiotic. b. It provides a way for researchers to sort the bacteria that have the cloning plasmid from the bacteria that don't have the cloning plasmid. c. It aids scientists in developing new antibiotic treatments. d. It provides a way for sorting bacteria that have the gene of interest from the bacteria that just have an "empty" cloning plasmid. e. It makes the bacteria produce more clones.
A(n) ____________________ is a large-scale community of organisms in a major ecological setting. Fill in the blank(s) with the appropriate word(s)
Although ________ evolved many times in different lines of the protists, most protists are single-celled.
Fill in the blank(s) with the appropriate word(s).
When a bacteriophage genome incorporates itself into the chromosome of the host, that phage genome is referred to as a(n) ________
A) lytic phage B) temperate phage C) T4 phage D) episome E) prophage