Hypersecretion of growth hormone in adulthood leads to enlarged hands, face, and feet, a condition known as:
a. dwarfism.
b. gigantism.
c. acromegaly.
d. goiter.
e. cretinism
c
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In reverse genetics, what is the correct order in which the experimenter proceeds?
A) silencing the genes in question using RNAi, followed by generating gain-of-function alleles B) screening genes via PCR, followed by deletion of the flanking sequences C) selection of a phenotypic alternative for the gene in question and sequencing its DNA D) induction of and selection for a mutant allele with a known sequence, followed by screening for mutations of interest E) random bombardment of the DNA with a known mutagen, followed by observation of offspring for newly acquired traits
The leaflike appendages of moss gametophytes may be one to two cell layers thick. Consequently, which of the following is LEAST likely to be found associated with such appendages?
A) cuticle B) phenolics C) stomata D) peroxisomes
Four of the following are shared characteristics of parabasalids and diplomonads. Which is the exception?
A. Heterotrophic B. Flagella C. Oxygen-poor or anaerobic habitats D. Abundant mitochondria E. Live in animals
Answer the following questions true (T) or false (F)
1. Cholesterol helps to maintain the correct fluidity of the plasma membrane. 2. The phospholipid bilayer forms spontaneously in water. 3. The phospholipid bilayer forms because fatty-acid tails do not dissolve in water.