Four of the five answers listed below are related by a common gender. Select the exception
a. Barr body
b. Y chromosome
c. dosage compensation
d. XIST gene
e. X inactivation
b
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Trophic efficiency is _____
A) the ratio of net secondary production to assimilation of primary production B) the percentage of production transferred from one trophic level to the next C) a measure of how nutrients are cycled from one trophic level to the next D) usually greater than production efficiencies E) about 90% in most ecosystems
Some researchers think H. floresiensis is a
more common early human with a genetic or nutritional disorder. What other early human was thought of this way when their fossils were first discovered? a. H. neanderthalensis b. H. erectus c. H. sapiens d. H. ergaster e. H. habilis
The AIDS epidemic has driven many African
populations to what demographic stage? a. preindustrial b. transitional c. industrial d. postindustrial e. pretransitional
Four of the five answers listed below are true of a neuron at resting potential. Select the exception
a. The interior of a neuron is positive. b. The interior of a neuron has a negative charge. c. There are more sodium ions outside a neuron. d. There are more potassium ions inside a neuron. e. The membrane of a neuron is polarized.