Although the structures of the functional groups that are most important to life vary, they share one thing in common: They _____.
A. all contain oxygen
B. all have at least one double bond
C. always cause the carbon to which they are attached to become an asymmetric carbon, thus they convert the molecule into an enantiomer
D. all are hydrophilic and increase the organic compound's water solubility
E. force straight chains of carbons into closed rings of carbon
Ans: D. all are hydrophilic and increase the organic compound's water solubility
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Organisms that cannot make their own food and must obtain energy from the foods they eat are called
a) autotrophs. b) heterotrophs. c) thylakoids. d) plants.
What is the name of a sudden and involuntary muscular contraction, often accompanied by pain?
A. spasm B. bursitis C. tic D. strain E. sprain
Most of the energy available to a primary consumer
a. will be used up in various biological activities. b. will be converted into biomass. c. is obtained directly from solar energy. d. will be passed on to the animal that feeds upon it. e. will remain with the consumer until death.
Which of the following is a true statement?
A. A cross between Bb and bb genotypes would lead to offspring with a 1:4 phenotypic ratio. B. An example of a homozygous individual is Bb. C. You may associate pedigrees with purebred animals, such as purebred dogs, but pedigrees cannot represent human matings. D. A testcross is a mating between an individual with a dominant phenotype (but unknown genotype) and a homozygous recessive individual.