Which proteins are encoded by genes that code for the first mRNAs transcribed in Drosophila embryos?
A. Morphogen proteins
B. Caudal and Hunchback proteins
C. Dorsal proteins
D. Gap and Pair-rule proteins
E. Bicoid and Nanos proteins
Answer: E
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Glacial ice core data can provide scientists with information about atmospheric CO2 levels for the last 500 million years of Earth's history
A. true B. false
The outermost of the three primary germ layers is the ________
a. endoderm b. epidermis c. mesoderm d. ectoderm
Long-term memory
a. involves reverberating circuits. b. is limited to multiple chunks of information over a given time. c. requires extensive time for consolidation. d. is dependent on the corpus callosum. e. depends on activated receptors that are linked to G proteins.
A water molecule could move all the way through a plant from soil to root to xylem to leaf to air and pass through a living cell only once. This living cell would be a part of which structure?
A. a guard cell B. the root epidermis C. the endodermis D. the root cortex