Until the discovery of ________, enzymes were the only recognized biological molecules that were catalytic.
Fill in the blank(s) with the appropriate word(s).
ribozymes
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In populations of animals that defend an area for their own exclusive use or in plants that compete intensively for belowground resources such as water or nutrients, the spatial distribution of individuals is usually
A) homogenous. B) clumped. C) random. D) uniform.
How many oxidation reactions occur during the Citric acid cycle?
A. 2 B. 9 C. 6 D. 4 E. 1
The intensity of competition between two species increases as
a) the size of their shared environment increases b) their body size increases c) the similarity of their requirements and lifestyles increases d) one species approaches the point of extinction e) their reproductive success is reduced
If, in a heterozygous individual, only one allele is expressed in the phenotype, that allele is
A) normal. B) haploid. C) recessive. D) potent. E) dominant.