A structure, such as a flower in plants, or a liver in animals, consisting of tissues organized to carry out a specific function is a(n)
A. molecule.
B. cell.
C. organ.
D. population.
E. organelle.
C. organ.
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Enzymes
a. change the rate of a reaction. b. change the direction of a reaction. c. change the free energy of a reaction. d. are used up in a reaction. e. are present in concentrations approaching their substrates' concentrations.
Which of the following statements is false?
a. Axillary buds are found at the tip of the stems. b. Internodes are the spaces between leaves. c. Cotyledons are leaves within a seed. d. Ground tissue is the most common type of tissue in a plant. e. Dermal tissue covers the body of the plant.
Since males have only one X chromosome, the allele frequency of an X-linked trait is equal to the number of males
with the recessive phenotype. a. True b. False
Upon which of the following is passive immunity dependent?
A) a person's own immune system producing antibodies B) antibodies made by another organism C) antibody-producing cells from another organism D) antigens from a person's own body