Valeria has a serious disorder called fragile X syndrome and her brother does not have the disorder
Her mother does not have the disorder but her father does. What is the most likely inheritance pattern
for fragile X syndrome?
A. Autosomal dominant D. X-linked recessive
B. Autosomal recessive E. Y-linked recessive
C. X-linked dominant
C
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Which structure selectively regulates the transport of substances into and out of a plant cell?
A. The chloroplast B. The nucleus C. The cell wall D. The plasma membrane
Looking at a bacterial phylogenetic tree, in which group would you not expect to find photosynthetic bacteria?
A. cyanobacteria B. proteobacteria C. gram-positive bacteria D. purple sulfur bacteria E. heliobacteria
What is the biological risk of using salt on icy roads in parts of the country that have a cold winter season?
a. Plant root cells will grow in excess to try to reach fresh water. b. Plant cells will take on excess water from the melted ice and become turgid. c. Salt is in limited supply in the ecosystem and this type of overuse will make it even more so. d. The salt has the risk of leeching into the ground and creating a hypertonic environment for plant cells.
The lymphatic system
A. has a pumping mechanism to move fluid. B. includes areas of high concentrations of APCs, T and B cells. C. collects fluid from around the brain and spinal cord. D. is very impermeable to extracellular fluid. E. is the site of B and T cell clonal deletion.