Mendel studied what he called characters and traits. What terms do we use today that have the same meaning?
a. alleles and genes
b. homozygous and heterozygous
c. diploid and haploid
d. genotype and phenotype
Answer: a. alleles and genes
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Pathogens or disease-causing agents are typically found in which two domains?
a. Archaea and Bacteria b. Bacteria and Eukarya c. Archaea and Eukarya d. Prokarya and Eukarya
Which of the following is NOT true?
a. Acids donate hydrogen ions. b. In a neutral solution, the amounts of hydrogen and hydroxyl ions are equal. c. Salts have no function in cells. d. Bases accept hydrogen ions.. e. .7.0 represents a neutral pH.
Which step of the nitrogen cycle is not performed by most bacteria?
a. ammonification b. denitrification c. assimilation d. nitrogen fixation e. nitrification
A typical human yawn lasts for about six seconds and once initiated, is nearly impossible to stop. Although there are many hypotheses for why we yawn, it is accepted that yawning is contagious - when we see someone else yawn, we often find ourselves yawning as well. This happens across all cultures and even in infants! In this case, the yawn an individual observes is ________, while their own yawn is ________.
A. a sign stimulus; a fixed action pattern B. reflex response; learned behavior C. an association; a conditioned response D. innate behavior; habituation