Which of the following is an adaptation to land seen in ferns but not in mosses?
a. vascular system
b. alternation of generations
c. ovules
d. seeds
e. spores
A; Ferns contain a vascular system; mosses do not. Both display alternation of generations and both contain spores. Neither contains ovules.
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Archaea have a unique form of conjugation involving cytoplasmic bridges for bidirectional transfer of DNA
Indicate whether the statement is true or false.
The most common adjuvant is
A. ethanol. B. formalin. C. alum. D. aluminum. E. alum AND aluminum.
A researcher has mapped the entire genome of an insect. She notices that the genome contains around a thousand copies of a particular DNA sequence. What is the most likely function of this DNA sequence?
A. The sequence most likely has no function. B. Its function is to code for rRNA. C. Its function is to provide antibiotic resistance. D. Its function is to copy and move within the genome via an RNA intermediate.
Which structure holds homologous chromosomes tightly together and supports them as they undergo recombination?
a. kinetochore b. centromere
c. microtubules d. spermatozoa e. synaptonemal complex