What is the function of the Casparian strip in the root?
A. It protects the surface of the root but allows water to be absorbed.
B. It allows for horizontal transport of water and nutrients.
C. It is the portion of the root that contains numerous root hairs.
D. It is an internal water-proofed layer that prevents water and minerals from moving through intercellular spaces on their way to the vascular tissue.
E. It seals the surface of roots that have been damaged.
Ans: D. It is an internal water-proofed layer that prevents water and minerals from moving through intercellular spaces on their way to the vascular tissue.
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What does DNA sequencing suggest about the relationship between the nuclear and organellar genomes?
A) The same subset of mitochondrial genes has moved to the nuclear genome in all species. B) Mitochondrial genes that are found in the nuclear genome do not have introns, suggesting that movement occurred via an RNA intermediate. C) The mitochondrial and nuclear genomes are entirely independent of each other. D) Some cells have two types of mitochondria that have different genome sequences. E) Some proteins found in mitochondria are imported from the cytoplasm.
Discuss the benefits of making genome sequencing techniques a routine part of medical care. What will be an ideal response?
The coefficient of inbreeding quantifies the probability that two alleles in a homozygous individual are ________, having descended from the same copy of the allele carried by a common ancestor of the inbred individual
Fill in the blank(s) with correct word
Gene inactivation is likely to produce
A. paralogs. B. horizontal gene transfer (HGT). C. homologues. D. orthologs. E. pseudogenes.