The activity of adenyl cyclase is influenced by
A. the presence of lactose in the environment.
B. the phosphotransferase system.
C. homoserine lactones.
D. None of the choices are correct.
Answer: B
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When looking at a linear ascus of spores in Neurospora, you find the following octet: leu- leu- + + leu- leu- leu- +
This sequence of spores most likely arose as the result of A) gene conversion. B) mitosis. C) meiosis I. D) meiosis II. E) mutation.
CO2 is transported in the blood in which of the following?
a. dissolved in the plasma exclusively. b. as bicarbonate ions exclusively. c. bound to hemoglobin exclusively. d. dissolved in the red blood cells exclusively. e. dissolved in the plasma, as bicarbonate ions and bound to hemoglobin.
An individual tree or plant produced by sexual reproduction and thus arising from a zygote is a genetic individual, known as a(n) ________
Fill in the blank(s) with correct word
Four of the following statements about fossils found on the island of Flores are true. Which one is the exception?
A. They are shorter than modern humans. B. They have very small brains. C. They are 200,000 years old. D. They have a heavy brow ridge. E. They have been described to be like “hobbits.”