When the heart becomes weaker and less efficient at pumping blood, the blood may back up in the veins and cause a condition known as ________.
Fill in the blank(s) with the appropriate word(s).
Answer: congestive heart failure
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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.
Which of the following observations supports the endosymbiotic theory for mitochondria? a. Mitochondria divide independently of nuclear division
b. All of the choices. c. Mitochondria have their own DNA. d. Membranes within mitochondria resemble plasma membranes of bacteria.
In living organisms, emergent properties
A. functionally arise from smaller successful parts and work together for a more successful organism. B. are produced in a new generation of offspring that will show the properties. C. develop tissue and organ systems, which show higher levels of complexity. D. functionally arise from larger successful parts working together for stronger organism. E. evolve new properties from other similar organisms.
The most diverse group of placental mammals are the ____.
A. bats B. carnivores C. rodents D. moles and shrews E. whales and dolphins