Pseudocoelomate nematodes lack a body cavity.
A. Correct, they are solid from the gut to the cuticle.
B. Incorrect, their body cavity is fully enclosed by ectoderm but is a functional body cavity.
C. Incorrect, although not fully enclosed by mesoderm, the pseudocoel is a body cavity.
D. Correct, their pseudocoel does not allow for the development and expansion of organs.
Answer: C
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On the island of Madeira, two populations of house mice have accumulated different Robertsonian translocation. Which are true about these two populations of mice? (Select all that apply.)
A) They have fewer chromosomes than mice in other areas of the world. B) They are isolated from each other geographically. C) If mice from different populations mate, their offspring are sterile. D) Mice from different populations are unable to mate with each other. E) They are becoming extinct because of semi sterility.
In eukaryotes, the electron transfer chain of aerobic respiration is located ____
a. in the intermembrane space of mitochondria b. in the matrix of mitochondria c. on the inner membrane of mitochondria d. in the outer membrane of mitochondria e. throughout the cytoplasm of the cell
Which group of organisms are viroids (not viruses) most likely to parasitize?
a. cattle b. fungi c. plants d. fish e. bacteria
Which of the following methods of preserving food sterilizes it?
A) canning B) pasteurization C) drying D) gamma radiation E) lyophilization