The transcription factor called SHOOT ROOT is involved in the specialization of root cells into what type of tissue?
A. Cortex.
B. Epidermis.
C. Endodermis.
D. Pericyte.
C. Endodermis.
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You have a sequence of DNA with a site on which the restriction enzyme EcoRI will act. EcoRI recognizes the sequence below and cuts each strand at the locations indicated by the arrows
Below is your sequence of DNA. You cut it with EcoRI. What fragments are produced? 5'ATTCGCGGAATTCTGG3' 3'TAAGCGCCTTAAGACC5' A. 5'ATTCGCGG3' 5'AATTCTGG3' 3'TAAGCGCCTTAA5' 3'GACC5' B. 5'ATTCGCGGAATT3' 5'CTGG3' 3'TAAGCGCC5' 3'TTAAGACC5' C. 5'ATTCGCGG3' 5'AATTCTGG3' 3'TAAGCGCC5' 3'TTAAGACC5' D. 5'ATTCGCG3' 5'GAATTCTGG3' 3'TAAGCGCCTTAAG5' 3'ACC5' E. 5'ATTCGCGG3' 5'AATT3' 5'CTGG3' 3'TAAGCGCC5' 3'TTAA5' 3'GACC5'
Which group of organisms are likely to live in the low tide zone?
a) Hermit crab, rock weed, sea lettuce b) Rock louse, periwinkle, limpet c) Buckshot barnacle, striped shore crab d) Sea star, brittle star, sea urchins
The presynaptic neuron and postsynaptic neuron do not directly contact each other because
a. one would inhibit the actions of the other. b. they never grow to sufficient length. c. the synaptic vesicles keep them apart. d. this would cause continuous impulse transmission. e. acetylcholine prevents this action.
Nondisjunction during mitosis leads to:
a. an individual with a clone of abnormal cells. b. an individual with all abnormal cells. c. death of the daughter cells. d. nonviable sperm. e. normal daughter cells.