Each of the following is a general characteristic of bryophytes except
A) a cellulose cell wall.
B) vascular tissue.
C) chlorophylls a and b.
D) being photosynthetic autotrophs.
E) being eukaryotic.
Answer: B) vascular tissue.
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The letter “B” in the above figure represents
a. nerve cords. b. ganglion. c. brain. d. branching nerves. e. none of these.
When carbon dioxide is low in the leaf, the Calvin cycle cannot proceed efficiently and the result is:
A. photorespiration B. shutting down photosynthesis C. cellular respiration D. light-independent reactions
Which enzymes from the pancreas function in the small intestine to digest proteins?
A. Amylases B. Lipases C. Trypsin and chymotrypsin D. Bile acids E. Disaccharidases
A researcher hypothesizes that crocodile gender is determined by the incubation temperature of the egg. The hypothesis states that an average nest temperature of 32-33°C results in the birth of male crocodiles while cooler and higher incubation temperatures result in female crocodiles.What is a valid, testable prediction based on this hypothesis?
A. Male eggs will hatch at 32°C, while female eggs will not hatch at 32°C. B. Male crocodiles will prefer temperatures of 32-33°C. C. Male eggs will be more fragile than female eggs. D. Incubation of any crocodile egg at 32°C, will result in a male crocodile. E. Crocodiles arrange the gender of offspring by manipulating incubation temperatures.