Methane is a significant part of the carbon cycle in ________ environments dominated by methanogens.
A. thermophilic
B. autotrophic
C. anaerobic
D. oligotrophic
Answer: C
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Oviparous animals ____
a. lay eggs that contain the nutrients needed for development of the embryo outside the mother’s body b. retain the embryo within the mother’s body and nourish it at least through early embryo development c. have a specialized temporary structure, the placenta, which connects the embryo to the uterus during development d. retain fertilized eggs within the body, where the embryo develops using the nutrients provided by the egg e. have mature egg-producing and mature sperm-producing tissue present in the same individual
Individuals with Turner syndrome have the genotype ________
a. X0 b. XYY c. XXY d. XXX
Which occurs last in the stages of infection and recovery?
a. inflammation b. attack by lysozymes in sweat and saliva c. antibody-mediated immune response d. production of mucous e. production of interferon
Which of the following is a reason for metabolic regulation?
A. Ensure efficient use of energy stores B. Maintain cell components at appropriate levels C. Conserve materials D. All of the choices are correct.