Which of the following statements is FALSE? Saturated fats _____
A) are more common in animals than in plants
B) have many double bonds in the carbon chains of their fatty acids
C) usually solidify at room temperature
D) contain more hydrogen than unsaturated fats that consist of the same number of carbon atoms
B
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Why is it unlikely that DNA was NOT the first
self-replicating molecule of life?
a. nitrogen is essential for constructing DNA and there was no nitrogen on early Earth b. DNA is hyper-sensitive to oxygen and would have disassembled quickly in its presence c. DNA requires proteins like DNA polymerase for assembly so it doesn’t truly “self-replicate” d. it must have RNA to self-replicate and RNA evolved much later in life’s history e. more than one of these is correct
Reading a cladogram, birds are least related to?
A. mammals. B. turtles. C. amphibians. D. nonavian dinosaurs. E. crocodiles.
A group is experimenting with selection in an insect species due to exposure to a newly developed insecticide, cpd AW143. The group has found that after 10 generations of exposure, the population is now bimodal in its response to the drug
Close to 30% of the population are completely normal while 70% live only about 1/6 of the normal lifetime. This is an example of __________. A) threshold effect B) stabilizing selection C) additive genes D) directional selection E) disruptive selection
Following are correct reasons a young woman should consider adding calcium supplements to her diet, except
a. she follows a vegan diet. b. she has a milk allergy. c. she is a lacto-ovovegetarian. d. she is an ovovegetarian.