Which one of the following is the transparent portion of the sclera in the front of the eye?
A. lens
B. cornea
C. pupil
D. iris
B
You might also like to view...
An example of an inhibitory neurotransmitter is
A) acetylcholine. B) epinephrine. C) dopamine. D) GABA. E) insulin.
Caenorhabditis elegans is a nematode that scientists have shown grows from a single cell into about 1000 cells, of which the same 80 cells die during development through apoptosis. Studying this process in Caenorhabditis elegans has helped scientists identify the genes that regulate similar processes in humans. Which of the following statements is supported by this observation?
A. Caenorhabditis elegans have all of the same genes as humans. B. Caenorhabditis elegans give live birth like humans. C. Caenorhabditis elegans and humans have a common ancestor. D. Caenorhabditis elegans infections in humans trigger apoptosis. E. Caenorhabditis elegans has the same organs that are present in humans.
If a study of several pedigrees demonstrates that two
parents express a characteristic and none of their children express it, then the trait is controlled by a. a codominant gene. b. a simple dominant gene. c. a recessive gene. d. a sex-linked gene. e. No conclusion can be drawn.
Which of the following cell structures is NOT found in a bacterial cell?
A) Ribosomes B) Central vacuole C) DNA D) Plasma membrane E) Cell wall