The physical traits of an organism are called its _________.
A. allele
B. genotype
C. gene
D. phenotype
D. phenotype
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All of the following are functions of the mammalian kidney EXCEPT
A. water retention. B. filtration of blood. C. excretion of nitrogenous waste. D. regulation of salt balance in the blood. E. production of urea.
What is true of the differences between chemical and electrical synapses?
a. Signals across chemical synapses are sometimes bidirectional. b. Electrical synapses are only found in the brain. c. Neurons are physically connected across electrical synapses. d. Only charged ions can travel across electrical synapses.
Describe, in order from outside to inside, the cell layers of the typical plant root. Trace the path of water entering the root
What will be an ideal response?
How can Cytophaga and Flexibacter be distinguished in the laboratory?
a. by observing for gliding motility b. by comparing growth rate in acetate c. by scoring for growth on cellulose d. all of the above