Nematodes have an outer nonliving layer called a cuticle that must shed as the animal passes
from one juvenile stage to the next. This cuticle is produced by the epidermal cells that
originate from which germ layer?
a. endoderm
b. mesoderm
c. ectoderm
d. epiderm
C
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Which of the following concepts explains why the wings of a chicken and a robin are different?
a. homologous structure b. analogous structure c. modern synthesis d. microevolution
A Coulter counter can count viable cells as well as determine their size.
Answer the following statement true (T) or false (F)
Latency is associated with which of the following?
a. adenoviruses b. lysogenic pathways c. lytic pathways d. DNA viruses e. RNA viruses
Moist heat is more efficient at killing microbes and is effective at lower temperatures or shorter exposure times than dry heat.
Answer the following statement true (T) or false (F)