Further evolution of the protostomes changed the coelom by
a. losing it.
b. reducing it.
c. it becoming a pseudocoel.
d. all of the above.
c
You might also like to view...
Intermediate filaments
A) were first discovered in muscle cells. B) are grouped into five classes based on the cell types in which they are found. C) have molecular masses averaging 500 kDa. D) are smooth and sticky. E) assemble from nonfibrous filaments.
Repressible genes are usually actively transcribed when:a
repressor molecules bind to the promoter. b. the supply of the end product formed by the enzymes encoded by these genes is low. c. tryptophan accumulates in the cell. d. quantities of precursor materials are high. e. there is no other substrate that can be used by the cell.
A population of people who have lived in the middle of the jungle for thousands of years without
coming in contact with other individuals would show evidence of: a. genetic stasis. b. genetic equilibrium. c. random mating. d. an increase in non-harmful alleles. e. genetic polymorphism.
_______ is a large protein that extends from Z line to M line in a sacromere and accounts for the passive tension response of a stretched muscle fiber.
A. myosin B. titin C. connexin D. actin