This biome is the coldest, with the lowest biodiversity and a permanent layer of ice beneath the soil
A. alpine
B. savanna
C. taiga
D. tundra
E. temperate coniferous forest
D
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Although 61 different codons code for amino acids, cells contain fewer than 61 different tRNAs. Why?
A. Because the 5' base on the tRNA anticodon has some flexibility (wobble); thus, some tRNA anticodons can pair with more than one mRNA codon. B. Although 61 different codons code for amino acids, any given cell contains fewer than 61. C. Because the 5' base on the mRNA codon has some flexibility (wobble); thus, some mRNA codons can pair with more than one tRNA anticodon. D. Because each amino acid is coded for by just one codon.
How can the biomass of fungi in soil be greater considering that bacteria are more numerous?
A. Fungi are always multicellular organisms, while bacteria are unicellular. As such, biomass of fungi would always be larger than that of bacteria, since they possess more cells in each individual organism. B. This is a matter of size. Fungi, whether unicellular or multicellular, are eukaryotic. As such, they will generally be larger than bacteria (which are prokaryotic). This means that, even with a lower overall number, they will have more total biomass. C. It depends on where they grow. Fungi generally grow in the most moist areas near the top of soil. This gives them an advantage over bacteria. They may not be as numerous, but this advantage in location and nutrients is what makes them larger than the bacteria (and therefore having more biomass). If the bacteria evolved to take over the top portion of the soil, THEY would have the larger biomass than the fungi. D. Fungi are capable of incorporating the dead materials around them into themselves as nutrient sources (while bacteria are not). This capacity allows them to greatly increase their biomass per each organism, well beyond what a simple bacterial cell could hold. This capability is what allows them to achieve higher biomass than bacteria.
Calico cats with orange and black patches will always be ________
a. female homozygotes with X-linked genotype oo b. male homozygotes with autosomal dominant genotype OO c. female heterozygotes with X-linked genotype Oo d. male homozygotes with autosomal recessive genotype oo
A trait such as albinism is seen with equal frequency in males and females. Two people who do not have the trait might have offspring who do have the trait, at a frequency of approximately one in four. What can you conclude about the inheritance of this
trait? A) dominant, X-linked B) recessive, X-linked C) recessive, autosomal D) dominant, autosomal E) recessive, caused by polyploidy