Which of the following is/are a biological "population?"
A. all of the variable-colored ladybird beetles of the species Harmonia axyridis in a forest
B. all male and female English sparrows that reside in your community
C. all of the corn plants in a cornfield
D. all of the human population of a rural western town
E. All of the choices are correct.
Answer: E
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Deforestation in areas like Madagascar can significantly affect the water cycle. Why is this?
A. Less moisture is transpired into the atmosphere after deforestation. B. It is more difficult for soil nutrients to leach into streams after deforestation. C. The rate of evapotranspiration increases after deforestation. D. Cloud cover will increase after deforestation.
The most complete scientific picture of the oceans comes from:
a. thorough oceanographic studies. b. thorough marine biology studies. c. combining oceanography and marine biology information. d. having ocean usage policies. e. the popular media.
What is responsible for storing oxygen for muscle activity?
a. Hemoglobin b. Myoglobin c. Lactic acid d. Blood
Which of the following is true of ribosomes?
A) All prokaryotic ribosomes are 70S and eukaryotic cytoplasmic ribosomes are 80S B) Bacterial ribosomes are 70S, whereas archaeal and eukaryotic cytoplasmic ribosomes are 80S. C) Organelle ribosomes and prokaryotic ribosomes are 70S, whereas eukaryotic cytoplasmic ribosomes are 80S. D) Prokaryotic ribosomes are 80S, but eukaryotic cytoplasmic ribosomes are variable in size.