Genomic technology allows researchers to use ____ to survey the genome to detect associations between common
variations and a specific phenotype.
a. pedigrees
b. continuous traits
c. chromosome number
d. nucleotide variations
e. RNA
d
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Single-celled Paramecium live in pond water (a hypotonic environment). They have a structural feature, a contractile vacuole, which enables them to osmoregulate
If you observed them in the following solutions, at which sucrose concentration (in millimolars, mM) would you expect the contractile vacuole to be most active? A) 0.0 mM sucrose B) 0.05 mM saline C) 0.08 mM sucrose D) 1.0 mM saline
Cancer patients cells are removed and a new gene is introduced into their _____________
Fill in the blank(s) with the appropriate word(s)
You are on the committee to update the design of the hospital NICU (neonatal intensive care unit), which currently has incubators for the babies but not much else. Based on what you have learned about Harlow's experiments with rhesus monkeys, what would you suggest adding to the NICU to improve the babies' health and well-being?
A. comfortable chairs for parents to hold their babies B. pheromones C. white-noise devices to mask the sound of beeping machines D. softer lighting
The earliest cells detectable in fossils were different from the cells in animals, plants, fungi, and protists living today. These first prokaryotic cells gave rise to eukaryotic cells approximately 1.7 billion years ago. The structure of eukaryotic cells today suggests how they might have evolved from their prokaryotic ancestors. Scientists examining mitochondria and chloroplasts now think that these organelles were probably free-living prokaryotes before becoming a part of eukaryotic cells long ago. Which of the following is a characteristic of chloroplasts that suggests that they might have evolved from free-living bacteria?
A) Chloroplasts have cell walls. B) Chloroplasts contain pigments. C) Chloroplasts have their own DNA. D) A single, highly folded plasma membrane surrounds chloroplasts.