Miller and Urey's experiments to simulate prebiotic evolution produced
A) mitochondria and chloroplasts.
B) a rich mixture of organic molecules.
C) prokaryotic cells.
D) large amounts of free oxygen.
E) protocells.
B
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True or false: sequences that are conserved (i.e., similar in many different organisms) are unlikely to be functionally important
A. true B. false
Which of the following is correct?
1.dragonfly and bat wings are homologous
2.dragonfly, bat and bird wings are homologous
3.dragonfly and bat wings are an example of divergent evolution
4.none of these
Sarah loved to run in the dry desert town of Needles, CA. However, when she moved to Mobile, AL, on the coast of the Gulf of Mexico, she was surprised that when she went out for a jog at 91°F (33°C), she developed dizziness and confusion sooner than
she had in the desert at the same temperature. She is probably suffering from ________. A) homeostasis B) hypothermia C) hyperthermia D) hypothalamus
The eye is a warm, moist environment favored by many harmful bacteria. Nevertheless, eye infections are relatively rare. Why is this?
A) Tears contain the antibacterial enzyme lysozyme. B) The eyes are constantly exposed to UV light, which inhibits bacterial growth. C) Antibodies, particularly IgM, are secreted in abundance in the tears. D) The enzyme tearase inhibits bacterial growth.