waste
What will be an ideal response?
any materials unused and rejected as worthless or unwanted
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True or false: You would expect similar species with a different number of chromosomes to be genetically compatible and therefore able to reproduce
A. true B. false
How are purines distinguished from pyrimidines?
a. Purines are derived from a pair of fused C-N rings, while pyrimidines are derived from a single C-N ring. b. Pyrimidines are derived from a pair of fused C-N rings, while purines are derived from a single C-N ring. c. Purines have a carbon-containing ring, while pyrimidines have a nitrogenous ring. d. Pyrimidines have a carbon-containing ring, while purines have a nitrogenous ring. e. Purines are found only in DNA, while pyrimidines are found only in RNA.
The continental rise is composed of sediments deposited from:
a. biological activity. b. underwater landslides. c. midocean ridges. d. windblown sources. e. cosmogenous sources.
Of the following, which is probably the most common route for membrane flow in the endomembrane system?
a. Golgi lysosome ER plasma membrane b. tonoplast plasma membrane nuclear envelope smooth ER c. nuclear envelope lysosome Golgi plasma membrane d. rough ER vesicles Golgi plasma membrane e. ER chloroplasts mitochondrion cell membrane