Fishes have a two-chambered heart, a single atrium, and a single ventricle
Indicate whether the statement is true or false
TRUE
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Does the presence of introns/exons in eukaryotic cells provide more potential diversity in gene products (proteins) than is possible in prokaryotic cells?
A. It doesn't-this is a trick question. There's the same potential for gene products (proteins) in a bacterium with 1,000 genes as there is in a eukaryotic cell with 1,000 genes. B. It does-each exon and each intron could be used individually and discretely to make agene product (protein). Since bacteria lack these, they will have less ability to create different proteins. C. It does-exons/introns can be spliced together in different ways post-transcription to yield different mRNAs (and therefore, different proteins). Bacteria lack this system, so the gene you transcribe is translated into the only protein you'll end up getting. D. It does-exons/introns can be spliced together in different ways at the DNA levelto eventually yield different mRNAs (and therefore, different proteins). Bacteria lack this system, so the gene you transcribe is translated into the only protein you'll end up getting.
A species that three sets of homologous chromosomes can have __ different combinations of chromosomes in its gametes?
A. 3 B. 6 C. 8 D. 27 E. 64
Many animals share homologues of the gene PAX6, which is important in the development of ________
a. legs b. eyes c. segmentation d. wings
The idea that many species that once lived are now extinct due to major geologic events is called ________ and was developed by ________
a. catastrophism / Georges Cuvier b. inheritance of acquired traits / Jean-Baptiste Lamark c. principles of geology / Charles Lyell d. evolution / Charles Darwin