The bilaterians animals are divided into two monophyletic groups, the _____ and the _____, which are supported by patterns of comparative anatomy, comparative embryology, and molecular sequence data
A. Protostomia and Deuterostomia
B. Lophotrochozoa and Ecdysozoa
C. Chordata and Hemichordata
D. Eumetazoa and Protozoa
A
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Compare and contrast the structure and function of the saccule and utricle with that of the semicircular
canals with regard to maintaining equilibrium. What will be an ideal response?
Which of the following is an adaptation to increase the surface area of a part of a cell that is involved in cellular respiration?
A) the cristae of a mitochondrion B) the outer membrane of a chloroplast C) the grana of a chloroplast D) the endoplasmic reticulum
What is the effect of increased levels of parathyroid hormone?
A) Increased blood calcium levels B) Decreased blood calcium levels C) Increased estrogen levels D) Decreased metabolism E) Increased metabolism
The vir genes of the Ti plasmid
a. are transferred to the plant cell. b. are an example of a classic bacterial system in which stimulation of a sensor protein causes automethylation and transfer of the methyl to the second protein. c. are activated by phenolic compounds released by plant wounds. d. are expressed constitutively. e. are not required for transfer of DNA.