In humans, one pair of pharyngeal pouches become the tube-shaped organ called the
A. trachea.
B. esophagus.
C. pharynx.
D. bronchial tube.
E. Eustachian tube.
Answer: E
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Which substances speed up or halt transcription?
a. RNA polymerases b. DNA polymerases c. introns d. regulatory proteins e. exons
Which of the following statements accurately describes prophase?
a. The cell appears to have a line of chromosomes across the midregion. b. The nuclear envelope becomes visible. c. The cell constructs microtubules to form a spindle. d. Chromatids separate and become known as chromosomes.
Which of the following hormones is produced in the ovaries?
a) estrogen b) vasopressin c) prolactin d) oxytocine
You are given the task of finding all the information that you can about a newly discovered species. Unfortunately the only material you have to study is a small tissue sample. You are able to sequence the DNA of this animal from the sample, and in doing so you find that the animal has multiple clusters of Hox genes. Without looking further, what can you conclude about this species? Check all that apply.
A. It has the potential for tremendous structural complexity. B. It is endothermic. C. It is a vertebrate. D. It is a chordate. E. It is a primate.