Luteinizing hormone (LH) triggers ovulation in females. What is its role in males?
A. It exists in rudimentary levels since LH is made by the anterior pituitary.
B. It controls production of testosterone.
C. It does not exist since males lack ovaries.
D. It is exactly the opposite chemical from male hormones, in an antibody-antigen fashion.
Answer: B
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What molecule can oxidize NADH?
A. Ubiquinone B. Acetaldehyde C. Isocitrate D. Lactate E. Glucose
In mammals, gestation is defined physiologically as the time from ________ to birth.
A. fertilization B. the first missed menstruation C. implantation D. ovulation E. blastocyst formation
Molecular/structural orientations (gradients) in an egg are thought to play a significant role in development. What evidence indicates that the maternal genotype is involved in providing such gradients?
A) Snail shell's coil based on environmental conditions. B) Results (non-Mendelian) indicate that the direction of shell coiling in snails is determined by the genotype of the mother, not the genotype of the zygote. C) Results indicate that the snail shell coiling is passed exclusively from the mother. D) The snail's father's genotype dictates the next generation's phenotype. E) The snail shell coiling depends on the genotype of the mother and the offspring.
The second law of thermodynamics states that:
A) energy can be neither created nor destroyed. B) all living organisms must eat to derive energy. C) energy is required to bring molecules into a cell against a concentration gradient. D) in energy-yielding reactions, matter goes from a more-ordered to a less-ordered state.